K8s | 二进制安装k8s集群 v1.25.4
二进制安装Kubernetes（k8s） v1.25.4 IPv4/IPv6双栈
https://github.com/cby-chen/Kubernetes 开源不易，帮忙点个star
注意：本文是在上文的基础上进行一定的修改和优化，建议将ip地址，主机名进行全局替换。本文总结遇到的bug，可以先看最后一点安装总结，提前知道哪里会有坑！！主要针对的系统是 CentOS7 版本是 1.25.4。我通过完善后的教程成功安装了！！！
介绍
kubernetes（k8s）二进制高可用安装部署，支持IPv4+IPv6双栈。
我使用IPV6的目的是在公网进行访问，所以我配置了IPV6静态地址。
若您没有IPV6环境，或者不想使用IPv6，不对主机进行配置IPv6地址即可。
不配置IPV6，不影响后续，不过集群依旧是支持IPv6的。为后期留有扩展可能性。
若不要IPv6 ，不给网卡配置IPv6即可，不要对IPv6相关配置删除或操作，否则会出问题。
1.环境
CentOS 7.4
Kubernetes 版本以 x.y.z 表示，其中 x 是主要版本， y 是次要版本，z 是补丁版本。目前最新 k8s 版本为 1.27（2023-7-31)
| 组件 | 单版本 | HA版本 | 说明 |
|---|---|---|---|
| kube-apiserver | 1.27 | 1.27，1.26 | 实例版本偏差最多为一个次要版本 |
| kubelet | 1.27，1.26，1.25 | 1.26，1.25 | 不能比 apiserver 高，可落后两个次版本 |
| kube-proxy | 1.27，1.26，1.25 | 1.26，1.25 | 不能比 apiserver 高，可落后两个次版本 可以比kubelet新或旧两个次版本 |
| kube-controller-manager kube-scheduler cloud-controller-manager |
1.27，1.26 | 1.26 | 不能比apiserver高，最多旧一个版本 |
| kubectl | 1.28、1.27，1.26 | 1.27，1.26 | 在 apiserver 的次要版本（新或旧一个版本）支持 |
| etcd | 3.4.22+和3.5.6+ |
主机规划
| 主机名称 | IP地址 | 说明 | 软件 |
|---|---|---|---|
| 192.168.1.60 | 外网节点 | 下载各种所需安装包 | |
| master1 | 192.168.222.11 | master节点 | kube-apiserver、kube-controller-manager、kube-scheduler、etcd、 kubelet、kube-proxy、nfs-client、haproxy、keepalived、nginx |
| master2 | 192.168.222.12 | master节点 | kube-apiserver、kube-controller-manager、kube-scheduler、etcd、 kubelet、kube-proxy、nfs-client、haproxy、keepalived、nginx |
| master3 | 192.168.222.13 | master节点 | kube-apiserver、kube-controller-manager、kube-scheduler、etcd、 kubelet、kube-proxy、nfs-client、haproxy、keepalived、nginx |
| node1 | 192.168.222.14 | node节点 | kubelet、kube-proxy、nfs-client、nginx |
| node2 | 192.168.222.15 | node节点 | kubelet、kube-proxy、nfs-client、nginx |
| 192.168.0.36 | VIP |
| 软件 | 版本 |
|---|---|
| kernel | 6.4.7-1.el7.elrepo.x86_64 |
| CentOS 7 | v8、 v7、Ubuntu |
| kube-apiserver、kube-controller-manager、kube-scheduler、kubelet、kube-proxy | 1.25.4 |
| etcd | v3.5.6 |
| containerd | v1.6.8 |
| # docker | v23.0.3 |
| cfssl | v1.6.0 |
| cni | v1.2.0 |
| crictl | v1.26.1 |
| # haproxy | v1.8.27 |
| # keepalived | v2.1.5 |
网段
物理主机：192.168.222.0/24
service：10.96.0.0/12
pod：172.16.0.0/12
安装包已经整理好：https://github.com/cby-chen/Kubernetes/releases/download/v1.25.4/kubernetes-v1.25.4.tar
1.1.k8s基础系统环境配置
1.2.配置IP
每一台都需要单独配置
配置网络（/etc/sysconfig/network-scripts/ifcfg-eth33）
#HWADDR=00:0c:29:F4:2F:93 // 网卡地址，注释便于克隆
ONBOOT=yes
BOOTPROTO=static // 将dhcp改为static,配置固定IP，
IPADDR=192.168.222.11 // 进入vmware虚拟网络编辑器查看，再设置IP 192.168.253.12
NETMASK=255.255.255.0
GATEWAY=192.168.133.2
DNS1=114.114.114.114
DNS2=8.8.8.8
# 重新加载
service network restart
删除/etc/udev/rules.d/70-persistent-net.rules //便于克隆,该文件也有网卡地址映射
rm -f /etc/udev/rules.d/70-persistent-net.rules
拍摄快照，克隆新的虚拟机 ，启动新虚拟机，MAC地址就会改变
1.3.设置主机名
配置主机名(/etc/sysconfig/network)
hostname=node01
配置映射(/etc/hosts)
192.168.133.31 node01
192.168.133.32 node02
......
验证 在node01上 ping node02 或 ping 192.168.133.32
编辑 C:\WINDOWS\System32\drivers\etc\hosts //windows应用程序也可以访问主机名
192.168.133.31 node01
......
hostnamectl set-hostname k8s-master1
hostnamectl set-hostname k8s-master2
hostnamectl set-hostname k8s-master3
hostnamectl set-hostname k8s-node1
hostnamectl set-hostname k8s-node2
1.4.配置yum源
cd /etc/yum.repos.d/
mv CentOS-Base.repo CentOS-Base.repo.bak
curl -Lo CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
yum clean all
yum makecache
yum update
yum upgrade
1.5.安装一些必备工具
# 对于 Ubuntu
apt update && apt upgrade -y && apt install -y wget psmisc vim net-tools nfs-kernel-server telnet lvm2 git tar curl
# 对于 CentOS 7
yum update -y && yum -y install wget psmisc vim net-tools nfs-utils telnet yum-utils device-mapper-persistent-data lvm2 git tar curl
# 对于 CentOS 8
yum update -y && yum -y install wget psmisc vim net-tools nfs-utils telnet yum-utils device-mapper-persistent-data lvm2 git network-scripts tar curl
1.7.关闭防火墙
# Ubuntu忽略，CentOS执行
systemctl disable --now firewalld
1.8.关闭SELinux
# Ubuntu忽略，CentOS执行
setenforce 0
sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/selinux/config
1.9.关闭交换分区
sed -ri 's/.*swap.*/#&/' /etc/fstab
swapoff -a && sysctl -w vm.swappiness=0
cat /etc/fstab
# /dev/mapper/centos-swap swap swap defaults 0 0
free -m #查看是否关闭 若swap行都显示 0 则表示关闭成功
1.11.进行时间同步
yum -y install ntpdate
crontab -e
0 */1 * * * ntpdate time1.aliyun.com
1.12.配置ulimit
ulimit -SHn 65535
cat >> /etc/security/limits.conf <<EOF
* soft nofile 655360
* hard nofile 131072
* soft nproc 655350
* hard nproc 655350
* seft memlock unlimited
* hard memlock unlimitedd
EOF
1.13.配置免密登录
# 生成SSH密钥对
ssh-keygen -t rsa
# 这将生成RSA密钥对，默认情况下保存在~/.ssh目录下，生成的密钥文件为id_rsa（私钥）和id_rsa.pub（公钥）。
# 将公钥复制到其他虚拟机
ssh-copy-id root@192.168.222.12
ssh-copy-id root@192.168.222.13
ssh-copy-id root@192.168.222.14
ssh-copy-id root@192.168.222.15
# 测试免密
ssh root@192.168.222.12
ssh root@192.168.222.13
ssh root@192.168.222.14
ssh root@192.168.222.15
1.15.升级内核至4.18版本以上
检查当前内核版本
uname -r
添加ELRepo源
sudo rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
sudo rpm -Uvh https://www.elrepo.org/elrepo-release-7.0-4.el7.elrepo.noarch.rpm
查看所有的内核版本
yum --disablerepo="*" --enablerepo="elrepo-kernel" list available
安装指定的内核版本, 下面是最新版本，m1是稳定版本
sudo yum --enablerepo=elrepo-kernel install kernel-m
查看系统所有的内核
sudo awk -F\' '$1=="menuentry " {print i++ " : " $2}' /etc/grub2.cfg
设置 grub
sudo grub2-set-default 0
编辑 /etc/default/grub 文件
设置 GRUB_DEFAULT=0
更新GRUB配置
sudo grub2-mkconfig -o /boot/grub2/grub.cfg
重启系统
sudo reboot
删除旧内核
rpm -qa | grep kernel
参考：https://aliatry.com/2022/01/08/CentOS-7-升级-Linux-内核/
1.16.安装ipvsadm
安装ipvsadm包
sudo yum install ipvsadm -y
加载IPVS内核模块
sudo modprobe ip_vs
sudo modprobe ip_vs_rr
sudo modprobe ip_vs_wrr
sudo modprobe ip_vs_sh
自动加载IPVS内核模块
编辑/etc/modules-load.d/ipvs.conf文件并添加以下内容：
ip_vs
ip_vs_rr
ip_vs_wrr
ip_vs_sh
保存文件后，重启系统或使用以下命令加载模块：
lsmod |grep ip_vs
1.17.修改内核参数
cat <<EOF > /etc/sysctl.d/k8s.conf
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-iptables = 1
fs.may_detach_mounts = 1
vm.overcommit_memory=1
vm.panic_on_oom=0
fs.inotify.max_user_watches=89100
fs.file-max=52706963
fs.nr_open=52706963
net.netfilter.nf_conntrack_max=2310720
net.ipv4.tcp_keepalive_time = 600
net.ipv4.tcp_keepalive_probes = 3
net.ipv4.tcp_keepalive_intvl =15
net.ipv4.tcp_max_tw_buckets = 36000
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_max_orphans = 327680
net.ipv4.tcp_orphan_retries = 3
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.ip_conntrack_max = 65536
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.tcp_timestamps = 0
net.core.somaxconn = 16384
net.ipv6.conf.all.disable_ipv6 = 0
net.ipv6.conf.default.disable_ipv6 = 0
net.ipv6.conf.lo.disable_ipv6 = 0
net.ipv6.conf.all.forwarding = 1
EOF
sysctl --system
1.18.所有节点配置hosts本地解析
cat > /etc/hosts <<EOF
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.222.11 k8s-master1
192.168.222.12 k8s-master2
192.168.222.13 k8s-master3
192.168.222.14 k8s-node1
192.168.222.15 k8s-node2
192.168.0.36 lb-vip
EOF
2.k8s基本组件安装
注意 ： 2.1 和 2.2 二选其一即可
2.1.安装Containerd作为Runtime （推荐）
# wget https://github.com/containernetworking/plugins/releases/download/v1.1.1/cni-plugins-linux-amd64-v1.1.1.tgz
cd kubernetes-v1.26.0/cby/
#创建cni插件所需目录
mkdir -p /etc/cni/net.d /opt/cni/bin
#解压cni二进制包
tar xf cni-plugins-linux-amd64-v*.tgz -C /opt/cni/bin/
# wget https://github.com/containerd/containerd/releases/download/v1.6.8/cri-containerd-cni-1.6.8-linux-amd64.tar.gz
#解压
tar -xzf cri-containerd-cni-*-linux-amd64.tar.gz -C /
#创建服务启动文件
cat > /etc/systemd/system/containerd.service <<EOF
[Unit]
Description=containerd container runtime
Documentation=https://containerd.io
After=network.target local-fs.target
[Service]
ExecStartPre=-/sbin/modprobe overlay
ExecStart=/usr/local/bin/containerd
Type=notify
Delegate=yes
KillMode=process
Restart=always
RestartSec=5
LimitNPROC=infinity
LimitCORE=infinity
LimitNOFILE=infinity
TasksMax=infinity
OOMScoreAdjust=-999
[Install]
WantedBy=multi-user.target
EOF
2.1.1配置Containerd所需的模块
cat <<EOF | sudo tee /etc/modules-load.d/containerd.conf
overlay
br_netfilter
EOF
2.1.2加载模块
systemctl restart systemd-modules-load.service
2.1.3配置Containerd所需的内核
cat <<EOF | sudo tee /etc/sysctl.d/99-kubernetes-cri.conf
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-ip6tables = 1
EOF
# 加载内核
sysctl --system
2.1.4创建Containerd的配置文件
# 创建默认配置文件
mkdir -p /etc/containerd
containerd config default | tee /etc/containerd/config.toml
# 修改Containerd的配置文件
sed -i "s#SystemdCgroup\ \=\ false#SystemdCgroup\ \=\ true#g" /etc/containerd/config.toml
cat /etc/containerd/config.toml | grep SystemdCgroup
sed -i "s#registry.k8s.io#registry.cn-hangzhou.aliyuncs.com/chenby#g" /etc/containerd/config.toml
cat /etc/containerd/config.toml | grep sandbox_image
sed -i "s#config_path\ \=\ \"\"#config_path\ \=\ \"/etc/containerd/certs.d\"#g" /etc/containerd/config.toml
cat /etc/containerd/config.toml | grep certs.d
mkdir /etc/containerd/certs.d/docker.io -pv
cat > /etc/containerd/certs.d/docker.io/hosts.toml << EOF
server = "https://docker.io"
[host."https://hub-mirror.c.163.com"]
capabilities = ["pull", "resolve"]
EOF
2.1.5启动并设置为开机启动
systemctl daemon-reload
systemctl enable --now containerd
systemctl restart containerd
2.1.6配置crictl客户端连接的运行时位置
# wget https://github.com/kubernetes-sigs/cri-tools/releases/download/v1.24.2/crictl-v1.24.2-linux-amd64.tar.gz
#解压
tar xf crictl-v*-linux-amd64.tar.gz -C /usr/bin/
#生成配置文件
cat > /etc/crictl.yaml <<EOF
runtime-endpoint: unix:///run/containerd/containerd.sock
image-endpoint: unix:///run/containerd/containerd.sock
timeout: 10
debug: false
EOF
#测试
systemctl restart containerd
crictl info
2.3.k8s与etcd下载及安装（仅在master1操作）
2.3.1解压k8s安装包
# 下载安装包
# wget https://dl.k8s.io/v1.25.4/kubernetes-server-linux-amd64.tar.gz
# wget https://github.com/etcd-io/etcd/releases/download/v3.5.6/etcd-v3.5.6-linux-amd64.tar.gz
# 解压k8s安装文件
cd cby
tar -xf kubernetes-server-linux-amd64.tar.gz --strip-components=3 -C /usr/local/bin kubernetes/server/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy}
# 解压etcd安装文件
tar -xf etcd*.tar.gz && mv etcd-*/etcd /usr/local/bin/ && mv etcd-*/etcdctl /usr/local/bin/
# 查看/usr/local/bin下内容
ls /usr/local/bin/
containerd crictl etcdctl kube-proxy
containerd-shim critest kube-apiserver kube-scheduler
containerd-shim-runc-v1 ctd-decoder kube-controller-manager
containerd-shim-runc-v2 ctr kubectl
containerd-stress etcd kubelet
2.3.2查看版本
[root@k8s-master1 ~]# kubelet --version
Kubernetes v1.25.4
[root@k8s-master1 ~]# etcdctl version
etcdctl version: 3.5.8
API version: 3.5
[root@k8s-master1 ~]#
2.3.3将组件发送至其他k8s节点
Master='k8s-master2 k8s-master3'
Work='k8s-node1 k8s-node2'
for NODE in $Master; do echo $NODE; scp /usr/local/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy} $NODE:/usr/local/bin/; scp /usr/local/bin/etcd* $NODE:/usr/local/bin/; done
for NODE in $Work; do scp /usr/local/bin/kube{let,-proxy} $NODE:/usr/local/bin/ ; done
mkdir -p /opt/cni/bin
2.3创建证书相关文件
mkdir pki
cd pki
cat > admin-csr.json << EOF
{
"CN": "admin",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "system:masters",
"OU": "Kubernetes-manual"
}
]
}
EOF
cat > ca-config.json << EOF
{
"signing": {
"default": {
"expiry": "876000h"
},
"profiles": {
"kubernetes": {
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
],
"expiry": "876000h"
}
}
}
}
EOF
cat > etcd-ca-csr.json << EOF
{
"CN": "etcd",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "etcd",
"OU": "Etcd Security"
}
],
"ca": {
"expiry": "876000h"
}
}
EOF
cat > front-proxy-ca-csr.json << EOF
{
"CN": "kubernetes",
"key": {
"algo": "rsa",
"size": 2048
},
"ca": {
"expiry": "876000h"
}
}
EOF
cat > kubelet-csr.json << EOF
{
"CN": "system:node:\$NODE",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "Beijing",
"ST": "Beijing",
"O": "system:nodes",
"OU": "Kubernetes-manual"
}
]
}
EOF
cat > manager-csr.json << EOF
{
"CN": "system:kube-controller-manager",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "system:kube-controller-manager",
"OU": "Kubernetes-manual"
}
]
}
EOF
cat > apiserver-csr.json << EOF
{
"CN": "kube-apiserver",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "Kubernetes",
"OU": "Kubernetes-manual"
}
]
}
EOF
cat > ca-csr.json << EOF
{
"CN": "kubernetes",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "Kubernetes",
"OU": "Kubernetes-manual"
}
],
"ca": {
"expiry": "876000h"
}
}
EOF
cat > etcd-csr.json << EOF
{
"CN": "etcd",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "etcd",
"OU": "Etcd Security"
}
]
}
EOF
cat > front-proxy-client-csr.json << EOF
{
"CN": "front-proxy-client",
"key": {
"algo": "rsa",
"size": 2048
}
}
EOF
cat > kube-proxy-csr.json << EOF
{
"CN": "system:kube-proxy",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "system:kube-proxy",
"OU": "Kubernetes-manual"
}
]
}
EOF
cat > scheduler-csr.json << EOF
{
"CN": "system:kube-scheduler",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "system:kube-scheduler",
"OU": "Kubernetes-manual"
}
]
}
EOF
cd ..
mkdir bootstrap
cd bootstrap
cat > bootstrap.secret.yaml << EOF
apiVersion: v1
kind: Secret
metadata:
name: bootstrap-token-c8ad9c
namespace: kube-system
type: bootstrap.kubernetes.io/token
stringData:
description: "The default bootstrap token generated by 'kubelet '."
token-id: c8ad9c
token-secret: 2e4d610cf3e7426e
usage-bootstrap-authentication: "true"
usage-bootstrap-signing: "true"
auth-extra-groups: system:bootstrappers:default-node-token,system:bootstrappers:worker,system:bootstrappers:ingress
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: kubelet-bootstrap
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:node-bootstrapper
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:bootstrappers:default-node-token
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: node-autoapprove-bootstrap
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:certificates.k8s.io:certificatesigningrequests:nodeclient
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:bootstrappers:default-node-token
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: node-autoapprove-certificate-rotation
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:certificates.k8s.io:certificatesigningrequests:selfnodeclient
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:nodes
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
annotations:
rbac.authorization.kubernetes.io/autoupdate: "true"
labels:
kubernetes.io/bootstrapping: rbac-defaults
name: system:kube-apiserver-to-kubelet
rules:
- apiGroups:
- ""
resources:
- nodes/proxy
- nodes/stats
- nodes/log
- nodes/spec
- nodes/metrics
verbs:
- "*"
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: system:kube-apiserver
namespace: ""
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:kube-apiserver-to-kubelet
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: User
name: kube-apiserver
EOF
cd ..
mkdir coredns
cd coredns
cat > coredns.yaml << EOF
apiVersion: v1
kind: ServiceAccount
metadata:
name: coredns
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
labels:
kubernetes.io/bootstrapping: rbac-defaults
name: system:coredns
rules:
- apiGroups:
- ""
resources:
- endpoints
- services
- pods
- namespaces
verbs:
- list
- watch
- apiGroups:
- discovery.k8s.io
resources:
- endpointslices
verbs:
- list
- watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
annotations:
rbac.authorization.kubernetes.io/autoupdate: "true"
labels:
kubernetes.io/bootstrapping: rbac-defaults
name: system:coredns
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:coredns
subjects:
- kind: ServiceAccount
name: coredns
namespace: kube-system
---
apiVersion: v1
kind: ConfigMap
metadata:
name: coredns
namespace: kube-system
data:
Corefile: |
.:53 {
errors
health {
lameduck 5s
}
ready
kubernetes cluster.local in-addr.arpa ip6.arpa {
fallthrough in-addr.arpa ip6.arpa
}
prometheus :9153
forward . /etc/resolv.conf {
max_concurrent 1000
}
cache 30
loop
reload
loadbalance
}
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: coredns
namespace: kube-system
labels:
k8s-app: kube-dns
kubernetes.io/name: "CoreDNS"
spec:
# replicas: not specified here:
# 1. Default is 1.
# 2. Will be tuned in real time if DNS horizontal auto-scaling is turned on.
strategy:
type: RollingUpdate
rollingUpdate:
maxUnavailable: 1
selector:
matchLabels:
k8s-app: kube-dns
template:
metadata:
labels:
k8s-app: kube-dns
spec:
priorityClassName: system-cluster-critical
serviceAccountName: coredns
tolerations:
- key: "CriticalAddonsOnly"
operator: "Exists"
nodeSelector:
kubernetes.io/os: linux
affinity:
podAntiAffinity:
preferredDuringSchedulingIgnoredDuringExecution:
- weight: 100
podAffinityTerm:
labelSelector:
matchExpressions:
- key: k8s-app
operator: In
values: ["kube-dns"]
topologyKey: kubernetes.io/hostname
containers:
- name: coredns
image: registry.cn-hangzhou.aliyuncs.com/chenby/coredns:v1.10.0
imagePullPolicy: IfNotPresent
resources:
limits:
memory: 170Mi
requests:
cpu: 100m
memory: 70Mi
args: [ "-conf", "/etc/coredns/Corefile" ]
volumeMounts:
- name: config-volume
mountPath: /etc/coredns
readOnly: true
ports:
- containerPort: 53
name: dns
protocol: UDP
- containerPort: 53
name: dns-tcp
protocol: TCP
- containerPort: 9153
name: metrics
protocol: TCP
securityContext:
allowPrivilegeEscalation: false
capabilities:
add:
- NET_BIND_SERVICE
drop:
- all
readOnlyRootFilesystem: true
livenessProbe:
httpGet:
path: /health
port: 8080
scheme: HTTP
initialDelaySeconds: 60
timeoutSeconds: 5
successThreshold: 1
failureThreshold: 5
readinessProbe:
httpGet:
path: /ready
port: 8181
scheme: HTTP
dnsPolicy: Default
volumes:
- name: config-volume
configMap:
name: coredns
items:
- key: Corefile
path: Corefile
---
apiVersion: v1
kind: Service
metadata:
name: kube-dns
namespace: kube-system
annotations:
prometheus.io/port: "9153"
prometheus.io/scrape: "true"
labels:
k8s-app: kube-dns
kubernetes.io/cluster-service: "true"
kubernetes.io/name: "CoreDNS"
spec:
selector:
k8s-app: kube-dns
clusterIP: 10.96.0.10
ports:
- name: dns
port: 53
protocol: UDP
- name: dns-tcp
port: 53
protocol: TCP
- name: metrics
port: 9153
protocol: TCP
EOF
cd ..
mkdir metrics-server
cd metrics-server
cat > metrics-server.yaml << EOF
apiVersion: v1
kind: ServiceAccount
metadata:
labels:
k8s-app: metrics-server
name: metrics-server
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
labels:
k8s-app: metrics-server
rbac.authorization.k8s.io/aggregate-to-admin: "true"
rbac.authorization.k8s.io/aggregate-to-edit: "true"
rbac.authorization.k8s.io/aggregate-to-view: "true"
name: system:aggregated-metrics-reader
rules:
- apiGroups:
- metrics.k8s.io
resources:
- pods
- nodes
verbs:
- get
- list
- watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
labels:
k8s-app: metrics-server
name: system:metrics-server
rules:
- apiGroups:
- ""
resources:
- pods
- nodes
- nodes/stats
- namespaces
- configmaps
verbs:
- get
- list
- watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
labels:
k8s-app: metrics-server
name: metrics-server-auth-reader
namespace: kube-system
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: Role
name: extension-apiserver-authentication-reader
subjects:
- kind: ServiceAccount
name: metrics-server
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
labels:
k8s-app: metrics-server
name: metrics-server:system:auth-delegator
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:auth-delegator
subjects:
- kind: ServiceAccount
name: metrics-server
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
labels:
k8s-app: metrics-server
name: system:metrics-server
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:metrics-server
subjects:
- kind: ServiceAccount
name: metrics-server
namespace: kube-system
---
apiVersion: v1
kind: Service
metadata:
labels:
k8s-app: metrics-server
name: metrics-server
namespace: kube-system
spec:
ports:
- name: https
port: 443
protocol: TCP
targetPort: https
selector:
k8s-app: metrics-server
---
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
k8s-app: metrics-server
name: metrics-server
namespace: kube-system
spec:
selector:
matchLabels:
k8s-app: metrics-server
strategy:
rollingUpdate:
maxUnavailable: 0
template:
metadata:
labels:
k8s-app: metrics-server
spec:
containers:
- args:
- --cert-dir=/tmp
- --secure-port=4443
- --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname
- --kubelet-use-node-status-port
- --metric-resolution=15s
- --kubelet-insecure-tls
- --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem # change to front-proxy-ca.crt for kubeadm
- --requestheader-username-headers=X-Remote-User
- --requestheader-group-headers=X-Remote-Group
- --requestheader-extra-headers-prefix=X-Remote-Extra-
image: registry.cn-hangzhou.aliyuncs.com/chenby/metrics-server:v0.5.2
imagePullPolicy: IfNotPresent
livenessProbe:
failureThreshold: 3
httpGet:
path: /livez
port: https
scheme: HTTPS
periodSeconds: 10
name: metrics-server
ports:
- containerPort: 4443
name: https
protocol: TCP
readinessProbe:
failureThreshold: 3
httpGet:
path: /readyz
port: https
scheme: HTTPS
initialDelaySeconds: 20
periodSeconds: 10
resources:
requests:
cpu: 100m
memory: 200Mi
securityContext:
readOnlyRootFilesystem: true
runAsNonRoot: true
runAsUser: 1000
volumeMounts:
- mountPath: /tmp
name: tmp-dir
- name: ca-ssl
mountPath: /etc/kubernetes/pki
nodeSelector:
kubernetes.io/os: linux
priorityClassName: system-cluster-critical
serviceAccountName: metrics-server
volumes:
- emptyDir: {}
name: tmp-dir
- name: ca-ssl
hostPath:
path: /etc/kubernetes/pki
---
apiVersion: apiregistration.k8s.io/v1
kind: APIService
metadata:
labels:
k8s-app: metrics-server
name: v1beta1.metrics.k8s.io
spec:
group: metrics.k8s.io
groupPriorityMinimum: 100
insecureSkipTLSVerify: true
service:
name: metrics-server
namespace: kube-system
version: v1beta1
versionPriority: 100
EOF
3.相关证书生成
# master1节点下载证书生成工具
wget -c https://github.com/cloudflare/cfssl/releases/download/v1.6.0/cfssl_1.6.0_linux_amd64 -O /usr/local/bin/cfssl
wget -c https://github.com/cloudflare/cfssl/releases/download/v1.6.0/cfssljson_1.6.0_linux_amd64 -O /usr/local/bin/cfssljson
wget -c https://github.com/cloudflare/cfssl/releases/download/v1.6.0/cfssl-certinfo_1.6.0_linux_amd64 -O /usr/local/bin/cfssl-certinfo
# 软件包内有
cp cfssl /usr/local/bin/cfssl
cp cfssljson /usr/local/bin/cfssljson
chmod +x /usr/local/bin/cfssl*
3.1.生成etcd证书
特别说明除外，以下操作在所有master节点操作
3.1.1所有master节点创建证书存放目录
mkdir /etc/etcd/ssl -p
3.1.2master1节点生成etcd证书
cd pki
# 生成etcd证书和etcd证书的key（如果你觉得以后可能会扩容，可以在ip那多写几个预留出来）
# 若没有IPv6 可删除可保留
cfssl gencert -initca etcd-ca-csr.json | cfssljson -bare /etc/etcd/ssl/etcd-ca
cfssl gencert \
-ca=/etc/etcd/ssl/etcd-ca.pem \
-ca-key=/etc/etcd/ssl/etcd-ca-key.pem \
-config=ca-config.json \
-hostname=127.0.0.1,k8s-master1,k8s-master2,k8s-master3,192.168.222.11,192.168.222.12,192.168.222.13,fc00:43f4:1eea:1::10,fc00:43f4:1eea:1::20,fc00:43f4:1eea:1::30,::1 \
-profile=kubernetes \
etcd-csr.json | cfssljson -bare /etc/etcd/ssl/etcd
3.1.3将证书复制到其他节点
Master='k8s-master2 k8s-master3'
for NODE in $Master; do ssh $NODE "mkdir -p /etc/etcd/ssl"; for FILE in etcd-ca-key.pem etcd-ca.pem etcd-key.pem etcd.pem; do scp /etc/etcd/ssl/${FILE} $NODE:/etc/etcd/ssl/${FILE}; done; done
3.2.生成k8s相关证书
特别说明除外，以下操作在所有master节点操作
3.2.1所有k8s节点创建证书存放目录
mkdir -p /etc/kubernetes/pki
3.2.2master1节点生成k8s证书
cfssl gencert -initca ca-csr.json | cfssljson -bare /etc/kubernetes/pki/ca
# 生成一个根证书 ，多写了一些IP作为预留IP，为将来添加node做准备
# 10.96.0.1是service网段的第一个地址，需要计算，192.168.0.36为高可用vip地址
# 若没有IPv6 可删除可保留
cfssl gencert \
-ca=/etc/kubernetes/pki/ca.pem \
-ca-key=/etc/kubernetes/pki/ca-key.pem \
-config=ca-config.json \
-hostname=10.96.0.1,192.168.0.36,127.0.0.1,kubernetes,kubernetes.default,kubernetes.default.svc,kubernetes.default.svc.cluster,kubernetes.default.svc.cluster.local,x.oiox.cn,k.oiox.cn,l.oiox.cn,o.oiox.cn,192.168.222.11,192.168.222.12,192.168.222.13,192.168.222.14,192.168.222.15,192.168.0.36,192.168.0.37,192.168.0.38,192.168.0.39,192.168.1.70,fc00:43f4:1eea:1::10,fc00:43f4:1eea:1::20,fc00:43f4:1eea:1::30,fc00:43f4:1eea:1::40,fc00:43f4:1eea:1::50,fc00:43f4:1eea:1::60,fc00:43f4:1eea:1::70,fc00:43f4:1eea:1::80,fc00:43f4:1eea:1::90,fc00:43f4:1eea:1::100,::1 \
-profile=kubernetes apiserver-csr.json | cfssljson -bare /etc/kubernetes/pki/apiserver
3.2.3生成apiserver聚合证书
cfssl gencert -initca front-proxy-ca-csr.json | cfssljson -bare /etc/kubernetes/pki/front-proxy-ca
# 有一个警告，可以忽略
cfssl gencert \
-ca=/etc/kubernetes/pki/front-proxy-ca.pem \
-ca-key=/etc/kubernetes/pki/front-proxy-ca-key.pem \
-config=ca-config.json \
-profile=kubernetes front-proxy-client-csr.json | cfssljson -bare /etc/kubernetes/pki/front-proxy-client
3.2.4生成controller-manage的证书
在《5.高可用配置》选择使用那种高可用方案
若使用 haproxy、keepalived 那么为 --server=https://192.168.0.36:8443
若使用 nginx方案，那么为 --server=https://127.0.0.1:8443
在这里使用的是 nginx 方案
cfssl gencert \
-ca=/etc/kubernetes/pki/ca.pem \
-ca-key=/etc/kubernetes/pki/ca-key.pem \
-config=ca-config.json \
-profile=kubernetes \
manager-csr.json | cfssljson -bare /etc/kubernetes/pki/controller-manager
# 设置一个集群项
# 在《5.高可用配置》选择使用那种高可用方案
# 若使用 haproxy、keepalived 那么为 `--server=https://192.168.0.36:8443`
# 若使用 nginx方案，那么为 `--server=https://127.0.0.1:8443`
kubectl config set-cluster kubernetes \
--certificate-authority=/etc/kubernetes/pki/ca.pem \
--embed-certs=true \
--server=https://127.0.0.1:8443 \
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
# 设置一个环境项，一个上下文
kubectl config set-context system:kube-controller-manager@kubernetes \
--cluster=kubernetes \
--user=system:kube-controller-manager \
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
# 设置一个用户项
kubectl config set-credentials system:kube-controller-manager \
--client-certificate=/etc/kubernetes/pki/controller-manager.pem \
--client-key=/etc/kubernetes/pki/controller-manager-key.pem \
--embed-certs=true \
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
# 设置默认环境
kubectl config use-context system:kube-controller-manager@kubernetes \
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
cfssl gencert \
-ca=/etc/kubernetes/pki/ca.pem \
-ca-key=/etc/kubernetes/pki/ca-key.pem \
-config=ca-config.json \
-profile=kubernetes \
scheduler-csr.json | cfssljson -bare /etc/kubernetes/pki/scheduler
# 在《5.高可用配置》选择使用那种高可用方案
# 若使用 haproxy、keepalived 那么为 `--server=https://192.168.0.36:8443`
# 若使用 nginx方案，那么为 `--server=https://127.0.0.1:8443`
kubectl config set-cluster kubernetes \
--certificate-authority=/etc/kubernetes/pki/ca.pem \
--embed-certs=true \
--server=https://127.0.0.1:8443 \
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
kubectl config set-credentials system:kube-scheduler \
--client-certificate=/etc/kubernetes/pki/scheduler.pem \
--client-key=/etc/kubernetes/pki/scheduler-key.pem \
--embed-certs=true \
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
kubectl config set-context system:kube-scheduler@kubernetes \
--cluster=kubernetes \
--user=system:kube-scheduler \
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
kubectl config use-context system:kube-scheduler@kubernetes \
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
cfssl gencert \
-ca=/etc/kubernetes/pki/ca.pem \
-ca-key=/etc/kubernetes/pki/ca-key.pem \
-config=ca-config.json \
-profile=kubernetes \
admin-csr.json | cfssljson -bare /etc/kubernetes/pki/admin
# 在《5.高可用配置》选择使用那种高可用方案
# 若使用 haproxy、keepalived 那么为 `--server=https://192.168.0.36:8443`
# 若使用 nginx方案，那么为 `--server=https://127.0.0.1:8443`
kubectl config set-cluster kubernetes \
--certificate-authority=/etc/kubernetes/pki/ca.pem \
--embed-certs=true \
--server=https://127.0.0.1:8443 \
--kubeconfig=/etc/kubernetes/admin.kubeconfig
kubectl config set-credentials kubernetes-admin \
--client-certificate=/etc/kubernetes/pki/admin.pem \
--client-key=/etc/kubernetes/pki/admin-key.pem \
--embed-certs=true \
--kubeconfig=/etc/kubernetes/admin.kubeconfig
kubectl config set-context kubernetes-admin@kubernetes \
--cluster=kubernetes \
--user=kubernetes-admin \
--kubeconfig=/etc/kubernetes/admin.kubeconfig
kubectl config use-context kubernetes-admin@kubernetes --kubeconfig=/etc/kubernetes/admin.kubeconfig
3.2.5创建kube-proxy证书
在《5.高可用配置》选择使用那种高可用方案
若使用 haproxy、keepalived 那么为 --server=https://192.168.0.36:8443
若使用 nginx方案，那么为 --server=https://127.0.0.1:8443
cfssl gencert \
-ca=/etc/kubernetes/pki/ca.pem \
-ca-key=/etc/kubernetes/pki/ca-key.pem \
-config=ca-config.json \
-profile=kubernetes \
kube-proxy-csr.json | cfssljson -bare /etc/kubernetes/pki/kube-proxy
# 在《5.高可用配置》选择使用那种高可用方案
# 若使用 haproxy、keepalived 那么为 `--server=https://192.168.0.36:8443`
# 若使用 nginx方案，那么为 `--server=https://127.0.0.1:8443`
kubectl config set-cluster kubernetes \
--certificate-authority=/etc/kubernetes/pki/ca.pem \
--embed-certs=true \
--server=https://127.0.0.1:8443 \
--kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
kubectl config set-credentials kube-proxy \
--client-certificate=/etc/kubernetes/pki/kube-proxy.pem \
--client-key=/etc/kubernetes/pki/kube-proxy-key.pem \
--embed-certs=true \
--kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
kubectl config set-context kube-proxy@kubernetes \
--cluster=kubernetes \
--user=kube-proxy \
--kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
kubectl config use-context kube-proxy@kubernetes --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
3.2.5创建ServiceAccount Key ——secret
openssl genrsa -out /etc/kubernetes/pki/sa.key 2048
openssl rsa -in /etc/kubernetes/pki/sa.key -pubout -out /etc/kubernetes/pki/sa.pub
3.2.6将证书发送到其他master节点
#其他节点创建目录
# mkdir /etc/kubernetes/pki/ -p
for NODE in k8s-master2 k8s-master3; do for FILE in $(ls /etc/kubernetes/pki | grep -v etcd); do scp /etc/kubernetes/pki/${FILE} $NODE:/etc/kubernetes/pki/${FILE}; done; for FILE in admin.kubeconfig controller-manager.kubeconfig scheduler.kubeconfig; do scp /etc/kubernetes/${FILE} $NODE:/etc/kubernetes/${FILE}; done; done
3.2.7查看证书
ls /etc/kubernetes/pki/
admin.csr controller-manager.csr kube-proxy.csr
admin-key.pem controller-manager-key.pem kube-proxy-key.pem
admin.pem controller-manager.pem kube-proxy.pem
apiserver.csr front-proxy-ca.csr sa.key
apiserver-key.pem front-proxy-ca-key.pem sa.pub
apiserver.pem front-proxy-ca.pem scheduler.csr
ca.csr front-proxy-client.csr scheduler-key.pem
ca-key.pem front-proxy-client-key.pem scheduler.pem
ca.pem front-proxy-client.pem
# 一共26个就对了
ls /etc/kubernetes/pki/ |wc -l
26
4.k8s系统组件配置
4.1.etcd配置
4.1.1master1配置
如果要用IPv6那么把IPv4地址修改为IPv6即可
cat > /etc/etcd/etcd.config.yml << EOF
name: 'k8s-master1'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://192.168.222.11:2380'
listen-client-urls: 'https://192.168.222.11:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.222.11:2380'
advertise-client-urls: 'https://192.168.222.11:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master1=https://192.168.222.11:2380,k8s-master2=https://192.168.222.12:2380,k8s-master3=https://192.168.222.13:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
peer-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
peer-client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
EOF
4.1.2master2配置
如果要用IPv6那么把IPv4地址修改为IPv6即可
cat > /etc/etcd/etcd.config.yml << EOF
name: 'k8s-master2'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://192.168.222.12:2380'
listen-client-urls: 'https://192.168.222.12:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.222.12:2380'
advertise-client-urls: 'https://192.168.222.12:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master1=https://192.168.222.11:2380,k8s-master2=https://192.168.222.12:2380,k8s-master3=https://192.168.222.13:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
peer-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
peer-client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
EOF
4.1.3master3配置
cat > /etc/etcd/etcd.config.yml << EOF
name: 'k8s-master3'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://192.168.222.13:2380'
listen-client-urls: 'https://192.168.222.13:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.222.13:2380'
advertise-client-urls: 'https://192.168.222.13:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master1=https://192.168.222.11:2380,k8s-master2=https://192.168.222.12:2380,k8s-master3=https://192.168.222.13:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
peer-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
peer-client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
EOF
4.2.创建service（所有master节点操作）
4.2.1创建etcd.service并启动
cat > /usr/lib/systemd/system/etcd.service << EOF
[Unit]
Description=Etcd Service
Documentation=https://coreos.com/etcd/docs/latest/
After=network.target
[Service]
Type=notify
ExecStart=/usr/local/bin/etcd --config-file=/etc/etcd/etcd.config.yml
Restart=on-failure
RestartSec=10
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
Alias=etcd3.service
EOF
4.2.2创建etcd证书目录
mkdir /etc/kubernetes/pki/etcd
ln -s /etc/etcd/ssl/* /etc/kubernetes/pki/etcd/
systemctl daemon-reload
systemctl enable --now etcd
# 查看 etcd 的状态
systemctl status etcd.service
# 查看 etcd 的日志，-f 实时
journalctl -xe -f
4.2.3查看etcd状态
# 如果要用IPv6那么把IPv4地址修改为IPv6即可
export ETCDCTL_API=3
etcdctl --endpoints="192.168.222.13:2379,192.168.222.12:2379,192.168.222.11:2379" --cacert=/etc/kubernetes/pki/etcd/etcd-ca.pem --cert=/etc/kubernetes/pki/etcd/etcd.pem --key=/etc/kubernetes/pki/etcd/etcd-key.pem endpoint status --write-out=table
+-----------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |
+-----------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| 192.168.222.13:2379 | d58e37898979ae63 | 3.5.7 | 20 kB | false | false | 2 | 8 | 8 | |
| 192.168.222.12:2379 | ec6b15415e24cb42 | 3.5.7 | 20 kB | false | false | 2 | 8 | 8 | |
| 192.168.222.11:2379 | 5e5cf1ca5cb2d291 | 3.5.7 | 20 kB | true | false | 2 | 8 | 8 | |
+-----------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
[root@k8s-master1 pki]#
5.高可用配置（在Master服务器上操作）
注意 5.1.1 和5.1.2 二选一即可*
选择使用那种高可用方案
在《3.2.生成k8s相关证书》
若使用 nginx方案，那么为 --server=https://127.0.0.1:8443
若使用 haproxy、keepalived 那么为 --server=https://192.168.0.36:8443
5.1 NGINX高可用方案 （推荐）
5.1.1自己手动编译（推荐）
在所有节点执行
# 安装编译环境
yum install gcc -y
# 下载解压nginx二进制文件
# wget http://nginx.org/download/nginx-1.22.1.tar.gz
tar xvf nginx-*.tar.gz
cd nginx-*
# 进行编译
./configure --with-stream --without-http --without-http_uwsgi_module --without-http_scgi_module --without-http_fastcgi_module
make && make install
# 拷贝编译好的nginx
node='k8s-master2 k8s-master3 k8s-node1 k8s-node2'
for NODE in $node; do scp -r /usr/local/nginx/ $NODE:/usr/local/nginx/; done
5.1.2使用我编译好的
# 使用我编译好的
cd kubernetes-v1.26.0/cby
# 拷贝我编译好的nginx
node='k8s-master1 k8s-master2 k8s-master3 k8s-node1 k8s-node2'
for NODE in $node; do scp nginx.tar $NODE:/usr/local/; done
# 其他节点上执行
cd /usr/local/
tar xvf nginx.tar
5.1.3写入启动配置
在所有主机上执行!!!
# 写入nginx配置文件
cat > /usr/local/nginx/conf/kube-nginx.conf <<EOF
worker_processes 1;
events {
worker_connections 1024;
}
stream {
upstream backend {
least_conn;
hash $remote_addr consistent;
server 192.168.222.11:6443 max_fails=3 fail_timeout=30s;
server 192.168.222.12:6443 max_fails=3 fail_timeout=30s;
server 192.168.222.13:6443 max_fails=3 fail_timeout=30s;
}
server {
listen 127.0.0.1:8443;
proxy_connect_timeout 1s;
proxy_pass backend;
}
}
EOF
# 写入启动配置文件
cat > /etc/systemd/system/kube-nginx.service <<EOF
[Unit]
Description=kube-apiserver nginx proxy
After=network.target
After=network-online.target
Wants=network-online.target
[Service]
Type=forking
ExecStartPre=/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/kube-nginx.conf -p /usr/local/nginx -t
ExecStart=/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/kube-nginx.conf -p /usr/local/nginx
ExecReload=/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/kube-nginx.conf -p /usr/local/nginx -s reload
PrivateTmp=true
Restart=always
RestartSec=5
StartLimitInterval=0
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
EOF
# 设置开机自启
systemctl enable --now kube-nginx
systemctl restart kube-nginx
systemctl status kube-nginx
6.k8s组件配置（区别于第4点）
所有k8s节点创建以下目录
mkdir -p /etc/kubernetes/manifests/ /etc/systemd/system/kubelet.service.d /var/lib/kubelet /var/log/kubernetes
6.1.创建apiserver（所有master节点）
6.1.1master1节点配置
cat > /usr/lib/systemd/system/kube-apiserver.service << EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-apiserver \\
--v=2 \\
--allow-privileged=true \\
--bind-address=0.0.0.0 \\
--secure-port=6443 \\
--advertise-address=192.168.222.11 \\
--service-cluster-ip-range=10.96.0.0/12,fd00:1111::/112 \\
--service-node-port-range=30000-32767 \\
--etcd-servers=https://192.168.222.11:2379,https://192.168.222.12:2379,https://192.168.222.13:2379 \\
--etcd-cafile=/etc/etcd/ssl/etcd-ca.pem \\
--etcd-certfile=/etc/etcd/ssl/etcd.pem \\
--etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \\
--client-ca-file=/etc/kubernetes/pki/ca.pem \\
--tls-cert-file=/etc/kubernetes/pki/apiserver.pem \\
--tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem \\
--kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem \\
--kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem \\
--service-account-key-file=/etc/kubernetes/pki/sa.pub \\
--service-account-signing-key-file=/etc/kubernetes/pki/sa.key \\
--service-account-issuer=https://kubernetes.default.svc.cluster.local \\
--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \\
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \
--authorization-mode=Node,RBAC \\
--enable-bootstrap-token-auth=true \\
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \\
--proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem \\
--proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem \\
--requestheader-allowed-names=aggregator \\
--requestheader-group-headers=X-Remote-Group \\
--requestheader-extra-headers-prefix=X-Remote-Extra- \\
--requestheader-username-headers=X-Remote-User \\
--enable-aggregator-routing=true
# --feature-gates=IPv6DualStack=true
# --token-auth-file=/etc/kubernetes/token.csv
Restart=on-failure
RestartSec=10s
LimitNOFILE=65535
[Install]
WantedBy=multi-user.target
EOF
6.1.2master2节点配置
cat > /usr/lib/systemd/system/kube-apiserver.service << EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-apiserver \\
--v=2 \\
--allow-privileged=true \\
--bind-address=0.0.0.0 \\
--secure-port=6443 \\
--advertise-address=192.168.222.12 \\
--service-cluster-ip-range=10.96.0.0/12,fd00:1111::/112 \\
--service-node-port-range=30000-32767 \\
--etcd-servers=https://192.168.222.11:2379,https://192.168.222.12:2379,https://192.168.222.13:2379 \\
--etcd-cafile=/etc/etcd/ssl/etcd-ca.pem \\
--etcd-certfile=/etc/etcd/ssl/etcd.pem \\
--etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \\
--client-ca-file=/etc/kubernetes/pki/ca.pem \\
--tls-cert-file=/etc/kubernetes/pki/apiserver.pem \\
--tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem \\
--kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem \\
--kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem \\
--service-account-key-file=/etc/kubernetes/pki/sa.pub \\
--service-account-signing-key-file=/etc/kubernetes/pki/sa.key \\
--service-account-issuer=https://kubernetes.default.svc.cluster.local \\
--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \\
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \\
--authorization-mode=Node,RBAC \\
--enable-bootstrap-token-auth=true \\
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \\
--proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem \\
--proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem \\
--requestheader-allowed-names=aggregator \\
--requestheader-group-headers=X-Remote-Group \\
--requestheader-extra-headers-prefix=X-Remote-Extra- \\
--requestheader-username-headers=X-Remote-User \\
--enable-aggregator-routing=true
# --feature-gates=IPv6DualStack=true
# --token-auth-file=/etc/kubernetes/token.csv
Restart=on-failure
RestartSec=10s
LimitNOFILE=65535
[Install]
WantedBy=multi-user.target
EOF
6.1.3master3节点配置
cat > /usr/lib/systemd/system/kube-apiserver.service << EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-apiserver \\
--v=2 \\
--allow-privileged=true \\
--bind-address=0.0.0.0 \\
--secure-port=6443 \\
--advertise-address=192.168.222.13 \\
--service-cluster-ip-range=10.96.0.0/12,fd00:1111::/112 \\
--service-node-port-range=30000-32767 \\
--etcd-servers=https://192.168.222.11:2379,https://192.168.222.12:2379,https://192.168.222.13:2379 \\
--etcd-cafile=/etc/etcd/ssl/etcd-ca.pem \\
--etcd-certfile=/etc/etcd/ssl/etcd.pem \\
--etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \\
--client-ca-file=/etc/kubernetes/pki/ca.pem \\
--tls-cert-file=/etc/kubernetes/pki/apiserver.pem \\
--tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem \\
--kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem \\
--kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem \\
--service-account-key-file=/etc/kubernetes/pki/sa.pub \\
--service-account-signing-key-file=/etc/kubernetes/pki/sa.key \\
--service-account-issuer=https://kubernetes.default.svc.cluster.local \\
--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \\
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \\
--authorization-mode=Node,RBAC \\
--enable-bootstrap-token-auth=true \\
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \\
--proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem \\
--proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem \\
--requestheader-allowed-names=aggregator \\
--requestheader-group-headers=X-Remote-Group \\
--requestheader-extra-headers-prefix=X-Remote-Extra- \\
--requestheader-username-headers=X-Remote-User \\
--enable-aggregator-routing=true
# --feature-gates=IPv6DualStack=true
# --token-auth-file=/etc/kubernetes/token.csv
Restart=on-failure
RestartSec=10s
LimitNOFILE=65535
[Install]
WantedBy=multi-user.target
EOF
6.1.4启动apiserver（所有master节点）
systemctl daemon-reload && systemctl enable --now kube-apiserver
# 注意查看状态是否启动正常
# systemctl status kube-apiserver
6.2.配置kube-controller-manager service
# 所有master节点配置，且配置相同
# 172.16.0.0/12为pod网段，按需求设置你自己的网段
cat > /usr/lib/systemd/system/kube-controller-manager.service << EOF
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-controller-manager \\
--v=2 \\
--bind-address=0.0.0.0 \\
--root-ca-file=/etc/kubernetes/pki/ca.pem \\
--cluster-signing-cert-file=/etc/kubernetes/pki/ca.pem \\
--cluster-signing-key-file=/etc/kubernetes/pki/ca-key.pem \\
--service-account-private-key-file=/etc/kubernetes/pki/sa.key \\
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig \\
--leader-elect=true \\
--use-service-account-credentials=true \\
--node-monitor-grace-period=40s \\
--node-monitor-period=5s \\
--controllers=*,bootstrapsigner,tokencleaner \\
--allocate-node-cidrs=true \\
--service-cluster-ip-range=10.96.0.0/12,fd00:1111::/112 \\
--cluster-cidr=172.16.0.0/12,fc00:2222::/112 \\
--node-cidr-mask-size-ipv4=24 \\
--node-cidr-mask-size-ipv6=120 \\
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem
# --feature-gates=IPv6DualStack=true
Restart=always
RestartSec=10s
[Install]
WantedBy=multi-user.target
EOF
6.2.1启动kube-controller-manager，并查看状态
systemctl daemon-reload
systemctl enable --now kube-controller-manager
# systemctl status kube-controller-manager
6.3.配置kube-scheduler service
6.3.1所有master节点配置，且配置相同
cat > /usr/lib/systemd/system/kube-scheduler.service << EOF
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-scheduler \\
--v=2 \\
--bind-address=0.0.0.0 \\
--leader-elect=true \\
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
Restart=always
RestartSec=10s
[Install]
WantedBy=multi-user.target
EOF
6.3.2启动并查看服务状态
systemctl daemon-reload
systemctl enable --now kube-scheduler
# systemctl status kube-scheduler
7.TLS Bootstrapping配置(通信)
7.1在master1上配置
# 在《5.高可用配置》选择使用那种高可用方案
# 若使用 haproxy、keepalived 那么为 `--server=https://192.168.0.36:8443`
# 若使用 nginx方案，那么为 `--server=https://127.0.0.1:8443`
cd bootstrap
kubectl config set-cluster kubernetes \
--certificate-authority=/etc/kubernetes/pki/ca.pem \
--embed-certs=true --server=https://127.0.0.1:8443 \
--kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
kubectl config set-credentials tls-bootstrap-token-user \
--token=c8ad9c.2e4d610cf3e7426e \
--kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
kubectl config set-context tls-bootstrap-token-user@kubernetes \
--cluster=kubernetes \
--user=tls-bootstrap-token-user \
--kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
kubectl config use-context tls-bootstrap-token-user@kubernetes \
--kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
# token的位置在bootstrap.secret.yaml，如果修改的话到这个文件修改
mkdir -p /root/.kube ; cp /etc/kubernetes/admin.kubeconfig /root/.kube/config
mv /etc/kubernetes/bootstrap-kubelet.kubeconfig /etc/kubernetes/kubelet.kubeconfig
systemctl restart kubelet
7.2查看集群状态，没问题的话继续后续操作
kubectl get cs
Warning: v1 ComponentStatus is deprecated in v1.19+
NAME STATUS MESSAGE ERROR
scheduler Healthy ok
controller-manager Healthy ok
etcd-0 Healthy {"health":"true","reason":""}
etcd-2 Healthy {"health":"true","reason":""}
etcd-1 Healthy {"health":"true","reason":""}
# 切记执行，别忘记！！！
kubectl create -f bootstrap.secret.yaml
8.node节点配置
8.1.在master1上将证书复制到node节点
cd /etc/kubernetes/
for NODE in k8s-master2 k8s-master3 k8s-node1 k8s-node2; do ssh $NODE mkdir -p /etc/kubernetes/pki; for FILE in pki/ca.pem pki/ca-key.pem pki/front-proxy-ca.pem bootstrap-kubelet.kubeconfig kube-proxy.kubeconfig; do scp /etc/kubernetes/$FILE $NODE:/etc/kubernetes/${FILE}; done; done
8.2.kubelet配置
注意 ： 8.2.1 和 8.2.2 需要和 上方 2.1 和 2.2 对应起来
8.2.2当使用Containerd作为Runtime （推荐）
mkdir -p /var/lib/kubelet /var/log/kubernetes /etc/systemd/system/kubelet.service.d /etc/kubernetes/manifests/
# 所有k8s节点配置kubelet service
cat > /usr/lib/systemd/system/kubelet.service << EOF
[Unit]
Description=Kubernetes Kubelet
Documentation=https://github.com/kubernetes/kubernetes
After=containerd.service
Requires=containerd.service
[Service]
ExecStart=/usr/local/bin/kubelet \\
--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig \\
--kubeconfig=/etc/kubernetes/kubelet.kubeconfig \\
--config=/etc/kubernetes/kubelet-conf.yml \\
--container-runtime-endpoint=unix:///run/containerd/containerd.sock
# --feature-gates=IPv6DualStack=true
# --container-runtime=remote
# --runtime-request-timeout=15m
# --cgroup-driver=systemd
[Install]
WantedBy=multi-user.target
EOF
8.2.3所有k8s节点创建kubelet的配置文件
cat > /etc/kubernetes/kubelet-conf.yml <<EOF
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
address: 0.0.0.0
port: 10250
readOnlyPort: 10255
authentication:
anonymous:
enabled: false
webhook:
cacheTTL: 2m0s
enabled: true
x509:
clientCAFile: /etc/kubernetes/pki/ca.pem
authorization:
mode: Webhook
webhook:
cacheAuthorizedTTL: 5m0s
cacheUnauthorizedTTL: 30s
cgroupDriver: systemd
cgroupsPerQOS: true
clusterDNS:
- 10.96.0.10
clusterDomain: cluster.local
containerLogMaxFiles: 5
containerLogMaxSize: 10Mi
contentType: application/vnd.kubernetes.protobuf
cpuCFSQuota: true
cpuManagerPolicy: none
cpuManagerReconcilePeriod: 10s
enableControllerAttachDetach: true
enableDebuggingHandlers: true
enforceNodeAllocatable:
- pods
eventBurst: 10
eventRecordQPS: 5
evictionHard:
imagefs.available: 15%
memory.available: 100Mi
nodefs.available: 10%
nodefs.inodesFree: 5%
evictionPressureTransitionPeriod: 5m0s
failSwapOn: true
fileCheckFrequency: 20s
hairpinMode: promiscuous-bridge
healthzBindAddress: 127.0.0.1
healthzPort: 10248
httpCheckFrequency: 20s
imageGCHighThresholdPercent: 85
imageGCLowThresholdPercent: 80
imageMinimumGCAge: 2m0s
iptablesDropBit: 15
iptablesMasqueradeBit: 14
kubeAPIBurst: 10
kubeAPIQPS: 5
makeIPTablesUtilChains: true
maxOpenFiles: 1000000
maxPods: 110
nodeStatusUpdateFrequency: 10s
oomScoreAdj: -999
podPidsLimit: -1
registryBurst: 10
registryPullQPS: 5
resolvConf: /etc/resolv.conf
rotateCertificates: true
runtimeRequestTimeout: 2m0s
serializeImagePulls: true
staticPodPath: /etc/kubernetes/manifests
streamingConnectionIdleTimeout: 4h0m0s
syncFrequency: 1m0s
volumeStatsAggPeriod: 1m0s
EOF
8.2.4启动kubelet
systemctl daemon-reload
systemctl restart kubelet
systemctl enable --now kubelet
systemctl status kubelet
8.2.5查看集群
[root@k8s-master1 ~]# kubectl get node
NAME STATUS ROLES AGE VERSION
k8s-master1 Ready <none> 18s v1.25.4
k8s-master2 Ready <none> 16s v1.25.4
k8s-master3 Ready <none> 16s v1.25.4
k8s-node1 Ready <none> 14s v1.25.4
k8s-node2 Ready <none> 14s v1.25.4
[root@k8s-master1 ~]#
查看节点 没有资源
containerd config default | sudo tee /etc/containerd/config.toml
sudo sed -i 's#SystemdCgroup = false#SystemdCgroup = true#g' /etc/containerd/config.toml
sudo sed -i 's#sandbox_image = "k8s.gcr.io/pause:3.6"#sandbox_image = "registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.6"#g' /etc/containerd/config.toml
sudo systemctl restart containerd
8.2.6查看容器运行时
[root@k8s-master1 ~]# kubectl describe node | grep Runtime
Container Runtime Version: containerd://1.6.20
Container Runtime Version: containerd://1.6.20
Container Runtime Version: containerd://1.6.20
Container Runtime Version: containerd://1.6.20
Container Runtime Version: containerd://1.6.20
[root@k8s-master1 ~]# kubectl describe node | grep Runtime
Container Runtime Version: docker://23.0.3
Container Runtime Version: docker://23.0.3
Container Runtime Version: docker://23.0.3
Container Runtime Version: docker://23.0.3
Container Runtime Version: docker://23.0.3
8.3.kube-proxy配置
8.3.1将kubeconfig发送至其他节点
for NODE in k8s-master2 k8s-master3; do scp /etc/kubernetes/kube-proxy.kubeconfig $NODE:/etc/kubernetes/kube-proxy.kubeconfig; done
for NODE in k8s-node1 k8s-node2; do scp /etc/kubernetes/kube-proxy.kubeconfig $NODE:/etc/kubernetes/kube-proxy.kubeconfig; done
8.3.2所有k8s节点添加kube-proxy的service文件
cat > /usr/lib/systemd/system/kube-proxy.service << EOF
[Unit]
Description=Kubernetes Kube Proxy
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-proxy \\
--config=/etc/kubernetes/kube-proxy.yaml \\
--v=2
Restart=always
RestartSec=10s
[Install]
WantedBy=multi-user.target
EOF
8.3.3所有k8s节点添加kube-proxy的配置
cat > /etc/kubernetes/kube-proxy.yaml << EOF
apiVersion: kubeproxy.config.k8s.io/v1alpha1
bindAddress: 0.0.0.0
clientConnection:
acceptContentTypes: ""
burst: 10
contentType: application/vnd.kubernetes.protobuf
kubeconfig: /etc/kubernetes/kube-proxy.kubeconfig
qps: 5
clusterCIDR: 172.16.0.0/12,fc00:2222::/112
configSyncPeriod: 15m0s
conntrack:
max: null
maxPerCore: 32768
min: 131072
tcpCloseWaitTimeout: 1h0m0s
tcpEstablishedTimeout: 24h0m0s
enableProfiling: false
healthzBindAddress: 0.0.0.0:10256
hostnameOverride: ""
iptables:
masqueradeAll: false
masqueradeBit: 14
minSyncPeriod: 0s
syncPeriod: 30s
ipvs:
masqueradeAll: true
minSyncPeriod: 5s
scheduler: "rr"
syncPeriod: 30s
kind: KubeProxyConfiguration
metricsBindAddress: 127.0.0.1:10249
mode: "ipvs"
nodePortAddresses: null
oomScoreAdj: -999
portRange: ""
udpIdleTimeout: 250ms
EOF
8.3.4启动kube-proxy
systemctl daemon-reload
systemctl restart kube-proxy
systemctl enable --now kube-proxy
9.安装网络插件
注意 9.1 和 9.2 二选其一即可，建议在此处创建好快照后在进行操作，后续出问题可以回滚
** centos7 要升级libseccomp 不然 无法安装网络插件**
# https://github.com/opencontainers/runc/releases
# 升级runc
# wget https://ghproxy.com/https://github.com/opencontainers/runc/releases/download/v1.1.4/runc.amd64
install -m 755 runc.amd64 /usr/local/sbin/runc
cp -p /usr/local/sbin/runc /usr/local/bin/runc
cp -p /usr/local/sbin/runc /usr/bin/runc
#下载高于2.4以上的包
yum -y install http://rpmfind.net/linux/centos/8-stream/BaseOS/x86_64/os/Packages/libseccomp-2.5.1-1.el8.x86_64.rpm
#查看当前版本
[root@k8s-master-1 ~]# rpm -qa | grep libseccomp
libseccomp-2.5.1-1.el8.x86_64
9.1安装Calico
9.1.1更改calico网段
wget https://mirrors.chenby.cn/https://github.com/projectcalico/calico/blob/master/manifests/calico-typha.yaml
cp calico-typha.yaml calico.yaml
cp calico-typha.yaml calico-ipv6.yaml
vim calico.yaml
# calico-config ConfigMap处
"ipam": {
"type": "calico-ipam",
},
- name: IP
value: "autodetect"
- name: CALICO_IPV4POOL_CIDR
value: "172.16.0.0/12"
# vim calico-ipv6.yaml
# calico-config ConfigMap处
"ipam": {
"type": "calico-ipam",
"assign_ipv4": "true",
"assign_ipv6": "true"
},
- name: IP
value: "autodetect"
- name: IP6
value: "autodetect"
- name: CALICO_IPV4POOL_CIDR
value: "172.16.0.0/12"
- name: CALICO_IPV6POOL_CIDR
value: "fc00::/48"
- name: FELIX_IPV6SUPPORT
value: "true"
# 若docker镜像拉不下来，可以使用我的仓库
# sed -i "s#docker.io/calico/#registry.cn-hangzhou.aliyuncs.com/chenby/#g" calico.yaml
# sed -i "s#docker.io/calico/#registry.cn-hangzhou.aliyuncs.com/chenby/#g" calico-ipv6.yaml
# 本地没有公网 IPv6 使用 calico.yaml
kubectl apply -f calico.yaml
# 本地有公网 IPv6 使用 calico-ipv6.yaml
# kubectl apply -f calico-ipv6.yaml
9.1.2查看容器状态
# calico 初始化会很慢 需要耐心等待一下，大约十分钟左右
[root@k8s-master1 ~]# kubectl get pod -A
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system calico-kube-controllers-6747f75cdc-fbvvc 1/1 Running 0 61s
kube-system calico-node-fs7hl 1/1 Running 0 61s
kube-system calico-node-jqz58 1/1 Running 0 61s
kube-system calico-node-khjlg 1/1 Running 0 61s
kube-system calico-node-wmf8q 1/1 Running 0 61s
kube-system calico-node-xc6gn 1/1 Running 0 61s
kube-system calico-typha-6cdc4b4fbc-57snb 1/1 Running 0 61s
9.2 安装cilium
9.2.1 安装helm
# [root@k8s-master1 ~]# curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3
# [root@k8s-master1 ~]# chmod 700 get_helm.sh
# [root@k8s-master1 ~]# ./get_helm.sh
wget https://get.helm.sh/helm-canary-linux-amd64.tar.gz
tar xvf helm-canary-linux-amd64.tar.gz
cp linux-amd64/helm /usr/local/bin/
9.2.2 安装cilium
# 添加源
helm repo add cilium https://helm.cilium.io
# 修改为国内源
helm pull cilium/cilium
tar xvf cilium-*.tgz
cd cilium/
sed -i "s#quay.io/cilium#registry.cn-hangzhou.aliyuncs.com/chenby#g" values.yaml
sed -i "s#quay.io/coreos#registry.cn-hangzhou.aliyuncs.com/chenby#g" values.yaml
# 默认参数安装
helm install harbor ./cilium/ -n kube-system
# 启用ipv6
# helm install cilium cilium/cilium --namespace kube-system --set ipv6.enabled=true
# 启用路由信息和监控插件
# helm install cilium cilium/cilium --namespace kube-system --set hubble.relay.enabled=true --set hubble.ui.enabled=true --set prometheus.enabled=true --set operator.prometheus.enabled=true --set hubble.enabled=true --set hubble.metrics.enabled="{dns,drop,tcp,flow,port-distribution,icmp,http}"
9.2.3 查看
[root@k8s-master1 ~]# kubectl get pod -A | grep cil
kube-system cilium-gmr6c 1/1 Running 0 5m3s
kube-system cilium-kzgdj 1/1 Running 0 5m3s
kube-system cilium-operator-69b677f97c-6pw4k 1/1 Running 0 5m3s
kube-system cilium-operator-69b677f97c-xzzdk 1/1 Running 0 5m3s
kube-system cilium-q2rnr 1/1 Running 0 5m3s
kube-system cilium-smx5v 1/1 Running 0 5m3s
kube-system cilium-tdjq4 1/1 Running 0 5m3s
[root@k8s-master1 ~]#
9.2.4 下载专属监控面板
安装时候没有创建 监控可以忽略
[root@k8s-master1 yaml]# wget https://raw.githubusercontent.com/cilium/cilium/1.12.1/examples/kubernetes/addons/prometheus/monitoring-example.yaml
[root@k8s-master1 yaml]#
[root@k8s-master1 yaml]# kubectl apply -f monitoring-example.yaml
namespace/cilium-monitoring created
serviceaccount/prometheus-k8s created
configmap/grafana-config created
configmap/grafana-cilium-dashboard created
configmap/grafana-cilium-operator-dashboard created
configmap/grafana-hubble-dashboard created
configmap/prometheus created
clusterrole.rbac.authorization.k8s.io/prometheus created
clusterrolebinding.rbac.authorization.k8s.io/prometheus created
service/grafana created
service/prometheus created
deployment.apps/grafana created
deployment.apps/prometheus created
[root@k8s-master1 yaml]#
9.2.5 下载部署测试用例
说明 测试用例 需要在 安装CoreDNS 之后即可完成
[root@k8s-master1 yaml]# wget https://raw.githubusercontent.com/cilium/cilium/master/examples/kubernetes/connectivity-check/connectivity-check.yaml
[root@k8s-master1 yaml]# sed -i "s#google.com#baidu.cn#g" connectivity-check.yaml
[root@k8s-master1 yaml]# kubectl apply -f connectivity-check.yaml
deployment.apps/echo-a created
deployment.apps/echo-b created
deployment.apps/echo-b-host created
deployment.apps/pod-to-a created
deployment.apps/pod-to-external-1111 created
deployment.apps/pod-to-a-denied-cnp created
deployment.apps/pod-to-a-allowed-cnp created
deployment.apps/pod-to-external-fqdn-allow-google-cnp created
deployment.apps/pod-to-b-multi-node-clusterip created
deployment.apps/pod-to-b-multi-node-headless created
deployment.apps/host-to-b-multi-node-clusterip created
deployment.apps/host-to-b-multi-node-headless created
deployment.apps/pod-to-b-multi-node-nodeport created
deployment.apps/pod-to-b-intra-node-nodeport created
service/echo-a created
service/echo-b created
service/echo-b-headless created
service/echo-b-host-headless created
ciliumnetworkpolicy.cilium.io/pod-to-a-denied-cnp created
ciliumnetworkpolicy.cilium.io/pod-to-a-allowed-cnp created
ciliumnetworkpolicy.cilium.io/pod-to-external-fqdn-allow-google-cnp created
[root@k8s-master1 yaml]#
9.2.6 查看pod
[root@k8s-master1 yaml]# kubectl get pod -A
NAMESPACE NAME READY STATUS RESTARTS AGE
cilium-monitoring grafana-59957b9549-6zzqh 1/1 Running 0 10m
cilium-monitoring prometheus-7c8c9684bb-4v9cl 1/1 Running 0 10m
default chenby-75b5d7fbfb-7zjsr 1/1 Running 0 27h
default chenby-75b5d7fbfb-hbvr8 1/1 Running 0 27h
default chenby-75b5d7fbfb-ppbzg 1/1 Running 0 27h
default echo-a-6799dff547-pnx6w 1/1 Running 0 10m
default echo-b-fc47b659c-4bdg9 1/1 Running 0 10m
default echo-b-host-67fcfd59b7-28r9s 1/1 Running 0 10m
default host-to-b-multi-node-clusterip-69c57975d6-z4j2z 1/1 Running 0 10m
default host-to-b-multi-node-headless-865899f7bb-frrmc 1/1 Running 0 10m
default pod-to-a-allowed-cnp-5f9d7d4b9d-hcd8x 1/1 Running 0 10m
default pod-to-a-denied-cnp-65cc5ff97b-2rzb8 1/1 Running 0 10m
default pod-to-a-dfc64f564-p7xcn 1/1 Running 0 10m
default pod-to-b-intra-node-nodeport-677868746b-trk2l 1/1 Running 0 10m
default pod-to-b-multi-node-clusterip-76bbbc677b-knfq2 1/1 Running 0 10m
default pod-to-b-multi-node-headless-698c6579fd-mmvd7 1/1 Running 0 10m
default pod-to-b-multi-node-nodeport-5dc4b8cfd6-8dxmz 1/1 Running 0 10m
default pod-to-external-1111-8459965778-pjt9b 1/1 Running 0 10m
default pod-to-external-fqdn-allow-google-cnp-64df9fb89b-l9l4q 1/1 Running 0 10m
kube-system cilium-7rfj6 1/1 Running 0 56s
kube-system cilium-d4cch 1/1 Running 0 56s
kube-system cilium-h5x8r 1/1 Running 0 56s
kube-system cilium-operator-5dbddb6dbf-flpl5 1/1 Running 0 56s
kube-system cilium-operator-5dbddb6dbf-gcznc 1/1 Running 0 56s
kube-system cilium-t2xlz 1/1 Running 0 56s
kube-system cilium-z65z7 1/1 Running 0 56s
kube-system coredns-665475b9f8-jkqn8 1/1 Running 1 (36h ago) 36h
kube-system hubble-relay-59d8575-9pl9z 1/1 Running 0 56s
kube-system hubble-ui-64d4995d57-nsv9j 2/2 Running 0 56s
kube-system metrics-server-776f58c94b-c6zgs 1/1 Running 1 (36h ago) 37h
[root@k8s-master1 yaml]#
9.2.7 修改为NodePort
安装时候没有创建 监控可以忽略
[root@k8s-master1 yaml]# kubectl edit svc -n kube-system hubble-ui
service/hubble-ui edited
[root@k8s-master1 yaml]#
[root@k8s-master1 yaml]# kubectl edit svc -n cilium-monitoring grafana
service/grafana edited
[root@k8s-master1 yaml]#
[root@k8s-master1 yaml]# kubectl edit svc -n cilium-monitoring prometheus
service/prometheus edited
[root@k8s-master1 yaml]#
type: NodePort
9.2.8 查看端口
安装时候没有创建 监控可以忽略
[root@k8s-master1 yaml]# kubectl get svc -A | grep monit
cilium-monitoring grafana NodePort 10.100.250.17 <none> 3000:30707/TCP 15m
cilium-monitoring prometheus NodePort 10.100.131.243 <none> 9090:31155/TCP 15m
[root@k8s-master1 yaml]#
[root@k8s-master1 yaml]# kubectl get svc -A | grep hubble
kube-system hubble-metrics ClusterIP None <none> 9965/TCP 5m12s
kube-system hubble-peer ClusterIP 10.100.150.29 <none> 443/TCP 5m12s
kube-system hubble-relay ClusterIP 10.109.251.34 <none> 80/TCP 5m12s
kube-system hubble-ui NodePort 10.102.253.59 <none> 80:31219/TCP 5m12s
[root@k8s-master1 yaml]#
9.2.9 访问
安装时候没有创建 监控可以忽略
http://192.168.222.11:30707
http://192.168.222.11:31155
http://192.168.222.11:31219
10.安装CoreDNS
10.1以下步骤只在master1操作
10.1.1修改文件
# 下载tgz包
helm repo add coredns https://coredns.github.io/helm
helm pull coredns/coredns
tar xvf coredns-*.tgz
cd coredns/
# 修改IP地址
vim values.yaml
cat values.yaml | grep clusterIP:
clusterIP: "10.96.0.10"
# 示例
---
service:
# clusterIP: ""
# clusterIPs: []
# loadBalancerIP: ""
# externalIPs: []
# externalTrafficPolicy: ""
# ipFamilyPolicy: ""
# The name of the Service
# If not set, a name is generated using the fullname template
clusterIP: "10.96.0.10"
name: ""
annotations: {}
---
# 修改为国内源 docker源可选
sed -i "s#coredns/#registry.cn-hangzhou.aliyuncs.com/chenby/#g" values.yaml
sed -i "s#registry.k8s.io/cpa/#registry.cn-hangzhou.aliyuncs.com/chenby/#g" values.yaml
# 默认参数安装
helm install coredns ./coredns/ -n kube-system
11.安装Metrics Server
11.1以下步骤只在master1操作
11.1.1安装Metrics-server
在新版的Kubernetes中系统资源的采集均使用Metrics-server，可以通过Metrics采集节点和Pod的内存、磁盘、CPU和网络的使用率
# 单机版
wget https://mirrors.chenby.cn/https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/components.yaml
# 高可用版本
wget https://mirrors.chenby.cn/https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/high-availability.yaml
# 修改配置
vim components.yaml
vim high-availability.yaml
---
# 1
defaultArgs:
- --cert-dir=/tmp
- --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname
- --kubelet-use-node-status-port
- --metric-resolution=15s
- --kubelet-insecure-tls
- --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem
- --requestheader-username-headers=X-Remote-User
- --requestheader-group-headers=X-Remote-Group
- --requestheader-extra-headers-prefix=X-Remote-Extra-
# 2
volumeMounts:
- mountPath: /tmp
name: tmp-dir
- name: ca-ssl
mountPath: /etc/kubernetes/pki
# 3
volumes:
- emptyDir: {}
name: tmp-dir
- name: ca-ssl
hostPath:
path: /etc/kubernetes/pki
---
# 修改为国内源 docker源可选
sed -i "s#registry.k8s.io/metrics-server/#registry.cn-hangzhou.aliyuncs.com/chenby/#g" *.yaml
# 二选一
kubectl apply -f high-availability.yaml
# kubectl apply -f components.yaml
11.1.2稍等片刻查看状态
kubectl top node
NAME CPU(cores) CPU% MEMORY(bytes) MEMORY%
k8s-master1 154m 1% 1715Mi 21%
k8s-master2 151m 1% 1274Mi 16%
k8s-master3 523m 6% 1345Mi 17%
k8s-node1 84m 1% 671Mi 8%
k8s-node2 73m 0% 727Mi 9%
k8s-node03 96m 1% 769Mi 9%
k8s-node04 68m 0% 673Mi 8%
k8s-node05 82m 1% 679Mi 8%
12.集群验证
12.1部署pod资源
cat<<EOF | kubectl apply -f -
apiVersion: v1
kind: Pod
metadata:
name: busybox
namespace: default
spec:
containers:
- name: busybox
image: docker.io/library/busybox:1.28
command:
- sleep
- "3600"
imagePullPolicy: IfNotPresent
restartPolicy: Always
EOF
# 查看
kubectl get pod
NAME READY STATUS RESTARTS AGE
busybox 1/1 Running 0 17s
12.2用pod解析默认命名空间中的kubernetes
kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 17h
kubectl exec busybox -n default -- nslookup kubernetes
3Server: 10.96.0.10
Address 1: 10.96.0.10 kube-dns.kube-system.svc.cluster.local
Name: kubernetes
Address 1: 10.96.0.1 kubernetes.default.svc.cluster.local
12.3测试跨命名空间是否可以解析
kubectl exec busybox -n default -- nslookup kube-dns.kube-system
Server: 10.96.0.10
Address 1: 10.96.0.10 kube-dns.kube-system.svc.cluster.local
Name: kube-dns.kube-system
Address 1: 10.96.0.10 kube-dns.kube-system.svc.cluster.local
12.4每个节点都必须要能访问Kubernetes的kubernetes svc 443和kube-dns的service 53
telnet 10.96.0.1 443
Trying 10.96.0.1...
Connected to 10.96.0.1.
Escape character is '^]'.
telnet 10.96.0.10 53
Trying 10.96.0.10...
Connected to 10.96.0.10.
Escape character is '^]'.
curl 10.96.0.10:53
curl: (52) Empty reply from server
12.5Pod和Pod之前要能通
kubectl get po -owide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
busybox 1/1 Running 0 17m 172.27.14.193 k8s-node2 <none> <none>
kubectl get po -n kube-system -owide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
calico-kube-controllers-5dffd5886b-4blh6 1/1 Running 0 77m 172.25.244.193 k8s-master1 <none> <none>
calico-node-fvbdq 1/1 Running 1 (75m ago) 77m 192.168.222.11 k8s-master1 <none> <none>
calico-node-g8nqd 1/1 Running 0 77m 192.168.222.14 k8s-node1 <none> <none>
calico-node-mdps8 1/1 Running 0 77m 192.168.222.15 k8s-node2 <none> <none>
calico-node-nf4nt 1/1 Running 0 77m 192.168.222.13 k8s-master3 <none> <none>
calico-node-sq2ml 1/1 Running 0 77m 192.168.222.12 k8s-master2 <none> <none>
calico-typha-8445487f56-mg6p8 1/1 Running 0 77m 192.168.222.15 k8s-node2 <none> <none>
calico-typha-8445487f56-pxbpj 1/1 Running 0 77m 192.168.222.11 k8s-master1 <none> <none>
calico-typha-8445487f56-tnssl 1/1 Running 0 77m 192.168.222.14 k8s-node1 <none> <none>
coredns-5db5696c7-67h79 1/1 Running 0 63m 172.25.92.65 k8s-master2 <none> <none>
metrics-server-6bf7dcd649-5fhrw 1/1 Running 0 61m 172.18.195.1 k8s-master3 <none> <none>
# 进入busybox ping其他节点上的pod
kubectl exec -ti busybox -- sh
/ # ping 192.168.222.14
PING 192.168.222.14 (192.168.222.14): 56 data bytes
64 bytes from 192.168.222.14: seq=0 ttl=63 time=0.358 ms
64 bytes from 192.168.222.14: seq=1 ttl=63 time=0.668 ms
64 bytes from 192.168.222.14: seq=2 ttl=63 time=0.637 ms
64 bytes from 192.168.222.14: seq=3 ttl=63 time=0.624 ms
64 bytes from 192.168.222.14: seq=4 ttl=63 time=0.907 ms
# 可以连通证明这个pod是可以跨命名空间和跨主机通信的
12.6创建三个副本，可以看到3个副本分布在不同的节点上（用完可以删了）
cat > deployments.yaml << EOF
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-deployment
labels:
app: nginx
spec:
replicas: 3
selector:
matchLabels:
app: nginx
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx
image: nginx
ports:
- containerPort: 80
EOF
kubectl apply -f deployments.yaml
deployment.apps/nginx-deployment created
kubectl get pod
NAME READY STATUS RESTARTS AGE
busybox 1/1 Running 0 6m25s
nginx-deployment-9456bbbf9-4bmvk 1/1 Running 0 8s
nginx-deployment-9456bbbf9-9rcdk 1/1 Running 0 8s
nginx-deployment-9456bbbf9-dqv8s 1/1 Running 0 8s
# 删除nginx
[root@k8s-master1 ~]# kubectl delete -f deployments.yaml
13.安装dashboard
helm repo add kubernetes-dashboard https://kubernetes.github.io/dashboard/
helm install kubernetes-dashboard kubernetes-dashboard/kubernetes-dashboard --namespace kube-system
13.1更改dashboard的svc为NodePort，如果已是请忽略
kubectl edit svc kubernetes-dashboard -n kube-system
type: NodePort
13.2查看端口号
kubectl get svc kubernetes-dashboard -n kube-system
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes-dashboard NodePort 10.108.120.110 <none> 443:30034/TCP 34s
13.3创建token
cat > dashboard-user.yaml << EOF
apiVersion: v1
kind: ServiceAccount
metadata:
name: admin-user
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: admin-user
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: cluster-admin
subjects:
- kind: ServiceAccount
name: admin-user
namespace: kube-system
EOF
kubectl apply -f dashboard-user.yaml
# 创建token
kubectl -n kube-system create token admin-user
eyJhbGciOiJSUzI1NiIsImtpZCI6IlhWQmNELWlxWWRXeDZwTm5iTU9jbTNfMWMxaUhoZkdTYlFaaFg0SVVGT0EifQ.eyJhdWQiOlsiaHR0cHM6Ly9rdWJlcm5ldGVzLmRlZmF1bHQuc3ZjLmNsdXN0ZXIubG9jYWwiXSwiZXhwIjoxNjgxNTQ4NjQzLCJpYXQiOjE2ODE1NDUwNDMsImlzcyI6Imh0dHBzOi8va3ViZXJuZXRlcy5kZWZhdWx0LnN2Yy5jbHVzdGVyLmxvY2FsIiwia3ViZXJuZXRlcy5pbyI6eyJuYW1lc3BhY2UiOiJrdWJlLXN5c3RlbSIsInNlcnZpY2VhY2NvdW50Ijp7Im5hbWUiOiJhZG1pbi11c2VyIiwidWlkIjoiNzY1ZTU2MjMtZjIyYy00ZGM3LTliODEtYjU4MGY5ZDllZWQ2In19LCJuYmYiOjE2ODE1NDUwNDMsInN1YiI6InN5c3RlbTpzZXJ2aWNlYWNjb3VudDprdWJlLXN5c3RlbTphZG1pbi11c2VyIn0.Pqzj9L0rO6FXCpy6yRBx700CjlOpfmXXKG-LIds1lGnz0m1bYwLZpq5RDPWrv_in2NuVu-O3Ej9q1-LExFNhoWWOKdjntRrm4fCRS1JZATcXZdk-ND_dNOVcoyOgon54krXrnmU8kDgcpMJrn7TL03rSn1loVMI0ZL53aRM7JrGFkAnCytkr0vdqZRBnUwvPMDFD9D5wetBGXoaI3fI257w4jp0mRj5nICl5pliMBX2MLM2RfhGVoLkfZdHN83kr597lOkR2UExEBH3qq-vS4tjX7YWrSHgBkKwfaQTv8RpMQYH4StJcsYALlatnG6-ZUBE7mI8d1fl2qSvT7qbjrQ
13.3登录dashboard
14.ingress安装
14.1执行部署
wget https://mirrors.chenby.cn/https://raw.githubusercontent.com/kubernetes/ingress-nginx/main/deploy/static/provider/cloud/deploy.yaml
vim deploy.yaml
cat deploy.yaml | grep image:
image: registry.cn-hangzhou.aliyuncs.com/chenby/controller:v1.7.0
image: registry.cn-hangzhou.aliyuncs.com/chenby/kube-webhook-certgen:v1.3.0
image: registry.cn-hangzhou.aliyuncs.com/chenby/kube-webhook-certgen:v1.3.0
cat > backend.yaml << EOF
apiVersion: apps/v1
kind: Deployment
metadata:
name: default-http-backend
labels:
app.kubernetes.io/name: default-http-backend
namespace: kube-system
spec:
replicas: 1
selector:
matchLabels:
app.kubernetes.io/name: default-http-backend
template:
metadata:
labels:
app.kubernetes.io/name: default-http-backend
spec:
terminationGracePeriodSeconds: 60
containers:
- name: default-http-backend
image: registry.cn-hangzhou.aliyuncs.com/chenby/defaultbackend-amd64:1.5
livenessProbe:
httpGet:
path: /healthz
port: 8080
scheme: HTTP
initialDelaySeconds: 30
timeoutSeconds: 5
ports:
- containerPort: 8080
resources:
limits:
cpu: 10m
memory: 20Mi
requests:
cpu: 10m
memory: 20Mi
---
apiVersion: v1
kind: Service
metadata:
name: default-http-backend
namespace: kube-system
labels:
app.kubernetes.io/name: default-http-backend
spec:
ports:
- port: 80
targetPort: 8080
selector:
app.kubernetes.io/name: default-http-backend
EOF
kubectl apply -f deploy.yaml
kubectl apply -f backend.yaml
cat > backend.yaml << EOF
apiVersion: apps/v1
kind: Deployment
metadata:
name: hello-server
spec:
replicas: 2
selector:
matchLabels:
app: hello-server
template:
metadata:
labels:
app: hello-server
spec:
containers:
- name: hello-server
image: registry.cn-hangzhou.aliyuncs.com/lfy_k8s_images/hello-server
ports:
- containerPort: 9000
---
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
app: nginx-demo
name: nginx-demo
spec:
replicas: 2
selector:
matchLabels:
app: nginx-demo
template:
metadata:
labels:
app: nginx-demo
spec:
containers:
- image: nginx
name: nginx
---
apiVersion: v1
kind: Service
metadata:
labels:
app: nginx-demo
name: nginx-demo
spec:
selector:
app: nginx-demo
ports:
- port: 8000
protocol: TCP
targetPort: 80
---
apiVersion: v1
kind: Service
metadata:
labels:
app: hello-server
name: hello-server
spec:
selector:
app: hello-server
ports:
- port: 8000
protocol: TCP
targetPort: 9000
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: ingress-host-bar
spec:
ingressClassName: nginx
rules:
- host: "hello.chenby.cn"
http:
paths:
- pathType: Prefix
path: "/"
backend:
service:
name: hello-server
port:
number: 8000
- host: "demo.chenby.cn"
http:
paths:
- pathType: Prefix
path: "/nginx"
backend:
service:
name: nginx-demo
port:
number: 8000
EOF
# 等创建完成后在执行：
kubectl apply -f ingress-demo-app.yaml
kubectl get ingress
NAME CLASS HOSTS ADDRESS PORTS AGE
ingress-host-bar nginx hello.chenby.cn,demo.chenby.cn 192.168.222.12 80 7s
14.2过滤查看ingress端口
# 修改为nodeport
kubectl edit svc -n ingress-nginx ingress-nginx-controller
type: NodePort
[root@hello ~/yaml]# kubectl get svc -A | grep ingress
ingress-nginx ingress-nginx-controller NodePort 10.104.231.36 <none> 80:32636/TCP,443:30579/TCP 104s
ingress-nginx ingress-nginx-controller-admission ClusterIP 10.101.85.88 <none> 443/TCP 105s
[root@hello ~/yaml]#
16.安装命令行自动补全功能
yum install bash-completion -y
source /usr/share/bash-completion/bash_completion
source <(kubectl completion bash)
echo "source <(kubectl completion bash)" >> ~/.bashrc
17.k8s集群部署总结
这次 k8s 集群部署耗时大概五天左右，一开始看了很多的教程，也是将几个教程结合到一起看的，后来就越来越混乱，最后锁定这个 Github 上的 教程，写的很详细很用心，非常感谢作者！
总结一下部署过程中出现的错误
-
一开始主要是 证书的问题，看了另一个教程，导致证书老是错误，包括路径，最后直接使用这个教程的证书管理，按照指令执行，基本没有出现上面问题了
-
第二个 问题就是 etcd或者 kubelet 查看状态的时候总是出现错误 failed，卡了很久这个问题，mentor进行了一波指导，最后发现是 高可用 Nginx 没有在每一台服务器进行部署
-
第三个问题是 kubectl get nodes 出现 No resources found。这个问题很多人都遇到了。可以参考 https://github.com/cby-chen/Kubernetes/issues/12
我的解决方法是将
--node-labels=node.kubernetes.io/node=''替换为--node-labels=node.kubernetes.io/node=将''删除即可。或许可以安装好插件 calico -
第四个问题是 ingress的 安装失败。创建自定义ingress报错：Internal error occurred: failed calling webhook “validate.nginx.ingress.kubernetes.io
参考解决方案 https://www.jianshu.com/p/1fd2361b2550
kubectl delete -A ValidatingWebhookConfiguration ingress-nginx-admission
重新进行部署即可
通过这次二进制部署k8s集群，深入理解了各个组件的运行过程，证书的生成和管理，高可用的搭建，耗时较长，成功之后得到mentor的认可 非常有成就感！
另外也学习到了不管是做什么事情，要对每一步都要深入理解，而不是按照教程一步一步的执行下去，理解每个步骤的用处，原理，这样遇到bug的时候就可以精准定位问题，快速解决！在学习的过程中 多问几个问题，自问自答，或许也可以加深理解！
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