3.k8s集群部署-二进制

3.k8s集群部署-二进制 | Evergreen Notes

k8s集群部署

1.基础环境部署

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k8s-etcd01      192.168.20.242
k8s-etcd02      192.168.20.243
k8s-etcd03      192.168.20.244
k8s-master01    192.168.20.237
k8s-master02    192.168.20.238
k8s-master03    192.168.20.239
k8s-master-lb   192.168.20.245
k8s-node01       192.168.20.240
k8s-node02       192.168.20.241
 
Pod网段		172.16.0.0/16
Service网段	10.96.0.0/16

1.1.重新生成machine-id

提示：如果你的环境是通过某一个虚拟机基于快照克隆出来的虚拟机，很有可能对应machine-id一样，可以通过上述命令将对应虚拟机的machine-id修改成不一样；注意上述命令不能再crt中同时对多个虚拟机执行，同时对多个虚拟机执行，生成的machine-id是一样的；(所有节点执行)

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1.2.所有节点更改主机名

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所有节点配置hosts，修改/etc/hosts如下

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1.3.所有节点配置yum源

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1.4.所有节点必备工具安装

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1.5.所有节点关闭防火墙、selinux、dnsmasq、swap

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1.6.所有节点同步时间

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1.7.所有节点配置limit

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1.8.所有节点升级系统并重启，此处升级没有升级内核，下节会单独升级内核

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yum update -y --exclude=kernel* && reboot #CentOS7需要升级，CentOS8可以按需升级系统

1.9.Master01节点免密钥登录其他节点

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1.10.Master01节点下载安装所有的源码文件

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cd /root/ ; git clone https://gitee.com/dukuan/k8s-ha-install.git

2.内核配置

CentOS7 需要升级内核至4.18+，本次升级的版本为4.19

2.1.在Master01节点下载内核

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cd /root
wget http://193.49.22.109/elrepo/kernel/el7/x86_64/RPMS/kernel-ml-devel-4.19.12-1.el7.elrepo.x86_64.rpm
wget http://193.49.22.109/elrepo/kernel/el7/x86_64/RPMS/kernel-ml-4.19.12-1.el7.elrepo.x86_64.rpm

2.2.从Master01节点传到其他节点

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2.3.所有节点安装内核

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2.4.所有节点安装ipvsadm

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yum install ipvsadm ipset sysstat conntrack libseccomp -y

2.5.所有节点配置ipvs模块

在内核4.19+版本nf_conntrack_ipv4已经改为nf_conntrack， 4.18以下使用nf_conntrack_ipv4即可：

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2.5.所有节点开启一些k8s集群中必须的内核参数，所有节点配置k8s内核：

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2.6.所有节点配置完内核后，重启服务器，保证重启后内核依旧加载

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reboot
lsmod | grep --color=auto -e ip_vs -e nf_conntrack

然后检查内核是不是4.19

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uname -a
Linux k8s-master02 4.19.12-1.el7.elrepo.x86_64 #1 SMP Fri Dec 21 11:06:36 EST 2018 x86_64 x86_64 x86_64 GNU/Linux

3.基本组件安装

所有节点安装docker-ce-20.10（如果已经有安装，也需要执行安装升级到最新版）

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yum install docker-ce-20.10.* docker-ce-cli-20.10.* containerd.io -y

首先配置Containerd所需的模块（所有节点）

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cat

所有节点加载模块

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modprobe -- overlay
modprobe -- br_netfilter

所有节点，配置Containerd所需的内核

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所有节点加载内核

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sysctl --system

所有节点配置Containerd的配置文件

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mkdir -p /etc/containerd
containerd config default | tee /etc/containerd/config.toml

所有节点将Containerd的Cgroup改为Systemd

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systemctl daemon-reload
systemctl enable --now containerd

所有节点配置crictl客户端连接的运行时位置

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4.K8s及etcd安装

Master01下载kubernetes安装包

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[root@k8s-master01 ~]# wget https://dl.k8s.io/v1.28.2/kubernetes-server-linux-amd64.tar.gz

https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.28.md

节点下载etcd安装包:

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wget https://github.com/etcd-io/etcd/releases/download/v3.5.9/etcd-v3.5.9-linux-amd64.tar.gz

master01解压kubernetes安装文件

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[root@k8s-master01 ~]# 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}

etcd01解压etcd安装文件

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 tar -zxvf etcd-v3.5.9-linux-amd64.tar.gz --strip-components=1 -C /usr/local/bin etcd-v3.5.9-linux-amd64/etcd{,ctl}

版本查看

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etcd01免密登录etcd02、etcd03、k8s-master01、k8s-master02、k8s-master03节点

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将组件发送到其他节点

master01操作

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etcd01操作

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k8s github : https://github.com/kubernetes/kubernetes/

master01 etcd01切换分支

Master01节点切换到1.28.x分支（其他版本可以切换到其他分支，.x即可，不需要更改为具体的小版本）

cd /root/k8s-ha-install && git checkout manual-installation-v1.28.x

5.生成证书

二进制安装最关键步骤，一步错误全盘皆输，一定要注意每个步骤都要是正确的

　　Master01 Etcd01下载生成证书工具

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5.1.Etcd证书

所有etcd节点创建etcd证书目录

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mkdir /etc/etcd/ssl -p

所有节点创建kubernetes相关目录

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mkdir -p /etc/kubernetes/pki

Etcd01节点生成etcd证书

生成证书的CSR文件：证书签名请求文件，配置了一些域名、公司、单位

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将证书复制到其他etcd节点

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5.2.k8s组件证书

Master01生成kubernetes证书

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[root@k8s-master01 pki]# cd /root/k8s-ha-install/pki

# 10.96.0.是k8s service的网段，如果说需要更改k8s service网段，那就需要更改10.96.0.1，

# 如果不是高可用集群，192.168.20.245为Master01的IP

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生成apiserver的聚合证书。Requestheader-client-xxx requestheader-allowwd-xxx:aggerator

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返回结果（忽略警告）

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# 生成controller-manage的证书

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创建ServiceAccount Key à secret

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openssl genrsa -out /etc/kubernetes/pki/sa.key 2048

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openssl rsa -in /etc/kubernetes/pki/sa.key -pubout -out /etc/kubernetes/pki/sa.pub

发送证书至其他节点

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查看证书文件

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6.高可用配置

所有Master节点通过yum安装HAProxy和KeepAlived

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yum install keepalived haproxy -y

所有Master节点配置HAProxy（详细配置参考HAProxy文档，所有Master节点的HAProxy配置相同）：

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所有Master节点配置KeepAlived，配置不一样，注意区分

[root@k8s-master01 pki]# vim /etc/keepalived/keepalived.conf ，注意每个节点的IP和网卡（interface参数）

6.1Master01节点的配置：

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6.3.Master02节点的配置：

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6.3.Master03节点的配置：

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6.4.所有master节点配置KeepAlived健康检查文件

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所有master节点启动haproxy和keepalived

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7. Kubernetes组件配置

etcd配置大致相同，注意修改每个Master节点的etcd配置的主机名和IP地址

所有etcd节点创建

7.1.Etcd01

vim /etc/etcd/etcd.config.yml

YAML

7.2.Etcd02

vim /etc/etcd/etcd.config.yml

YAML

7.3.Etcd03

vim /etc/etcd/etcd.config.yml

YAML

7.4.创建Service

所有Etcd节点创建etcd service并启动

vim /usr/lib/systemd/system/etcd.service

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所有Etcd节点创建etcd的证书目录

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查看etcd状态

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8.Apiserver

所有Master节点创建kube-apiserver service，# 注意，如果不是高可用集群，192.168.20.245改为master01的地址

8.1.Master01配置

注意本文档使用的k8s service网段为10.96.0.0/16，该网段不能和宿主机的网段、Pod网段的重复，请按需修改

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8.2.Master02配置

注意本文档使用的k8s service网段为10.96.0.0/16，该网段不能和宿主机的网段、Pod网段的重复，请按需修改

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8.3.Master03配置

注意本文档使用的k8s service网段为10.96.0.0/16，该网段不能和宿主机的网段、Pod网段的重复，请按需修改

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8.4.启动apiserver

所有Master节点开启kube-apiserver

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检测kube-server状态

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如果系统日志有这些提示可以忽略

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9.Controller Manager

所有Master节点配置kube-controller-manager service（所有master节点配置一样）

注意本文档使用的k8s Pod网段为172.16.0.0/16，该网段不能和宿主机的网段、k8s Service网段的重复，请按需修改

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所有Master节点启动kube-controller-manager

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查看启动状态

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10.cheduler

所有Master节点配置kube-scheduler service（所有master节点配置一样）

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11. TLS Bootstrapping配置

只需要在Master01创建bootstrap

# 注意，如果不是高可用集群，192.168.20.245:8443改为master01的地址，8443改为apiserver的端口，默认是6443

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可以正常查询集群状态，才可以继续往下，否则不行，需要排查k8s组件是否有故障

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12.Node节点配置

12.1复制证书

　　Master01节点复制证书至Node节点

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执行结果：

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ca.pem

12.2Kubelet配置

所有master node节点创建相关目录

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mkdir -p /var/lib/kubelet /var/log/kubernetes /etc/systemd/system/kubelet.service.d /etc/kubernetes/manifests/

所有节点配置kubelet service

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所有节点配置kubelet service的配置文件（也可以写到kubelet.service）：

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创建kubelet的配置文件

注意：如果更改了k8s的service网段，需要更改kubelet-conf.yml 的clusterDNS:配置，改成k8s Service网段的第十个地址，比如10.96.0.10

YAML

启动所有节点kubelet

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systemctl daemon-reload
systemctl enable --now kubelet

此时系统日志/var/log/messages显示只有如下两种信息为正常，安装calico后即可恢复

Unable to update cni config: no networks found in /etc/cni/net.d

如果有很多报错日志，或者有大量看不懂的报错，说明kubelet的配置有误，需要检查kubelet配置

查看集群状态(Ready或NotReady都正常)

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[root@k8s-master01 bootstrap]# kubectl get node

13.kube-proxy配置

# 注意，如果不是高可用集群，192.168.1.245:8443改为master01的地址，8443改为apiserver的端口，默认是6443

以下操作只在Master01执行

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将kubeconfig发送至其他节点

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所有节点添加kube-proxy的配置和service文件：

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如果更改了集群Pod的网段，需要更改kube-proxy.yaml的clusterCIDR为自己的Pod网段：

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所有节点启动kube-proxy

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此时系统日志/var/log/messages显示只有如下两种信息为正常，安装calico后即可恢复

Unable to update cni config: no networks found in /etc/cni/net.d

14.安装Calico

以下步骤只在master01执行

cd /root/k8s-ha-install/calico/

更改calico的网段，主要需要将红色部分的网段，改为自己的Pod网段

sed -i "s#POD_CIDR#*172.16.0.0/16*#g" calico.yaml

检查网段是自己的Pod网段， grep "IPV4POOL_CIDR" calico.yaml -A 1

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grep "IPV4POOL_CIDR" calico.yaml

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kubectl apply -f calico.yaml

查看容器状态

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如果容器状态异常可以使用kubectl describe 或者kubectl logs查看容器的日志

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15.安装CoreDNS

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cd /root/k8s-ha-install/

如果更改了k8s service的网段需要将coredns的serviceIP改成k8s service网段的第十个IP

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安装coredns

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16.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。

安装metrics server

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等待metrics server启动然后查看状态

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如果有如下报错，可以等待10\分钟后，再次查看

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Error from server (ServiceUnavailable): the server is currently unable to handle the request (get nodes.metrics.k8s.io)

17.安装dashboard

Dashboard用于展示集群中的各类资源，同时也可以通过Dashboard实时查看Pod的日志和在容器中执行一些命令等。

安装指定版本dashboard

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登录dashboard

更改dashboard的svc为NodePort：

YAML

根据自己的实例端口号，通过任意安装了kube-proxy的宿主机的IP+端口即可访问到dashboard：

访问Dashboard：https://192.168.20.245:30963/#/login 选择登录方式为令牌（即token方式）

创建登录Token：

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18.污点

18.1.查看节点污点

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18.2.污点增删

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YAML

hostnamectl set-hostname k8s-master01
hostnamectl set-hostname k8s-master02
hostnamectl set-hostname k8s-master03
hostnamectl set-hostname k8s-node01
hostnamectl set-hostname k8s-node02
hostnamectl set-hostname k8s-etcd01
hostnamectl set-hostname k8s-etcd02
hostnamectl set-hostname k8s-etcd03

cat > /etc/hosts<< EOF
192.168.20.237   k8s-master01
192.168.20.238   k8s-master02
192.168.20.239   k8s-master03
192.168.20.240   k8s-node01
192.168.20.241   k8s-node02
192.168.20.242   k8s-etcd01
192.168.20.243   k8s-etcd02
192.168.20.244   k8s-etcd03
EOF

curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
sed -i -e '/mirrors.cloud.aliyuncs.com/d' -e '/mirrors.aliyuncs.com/d' /etc/yum.repos.d/CentOS-Base.repo

systemctl disable --now firewalld 
systemctl disable --now dnsmasq
systemctl disable --now NetworkManager
 
setenforce 0
sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/sysconfig/selinux
sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/selinux/config
 
swapoff -a && sysctl -w vm.swappiness=0
sed -ri '/^[^#]*swap/s@^@#@' /etc/fstab

rpm -ivh http://mirrors.wlnmp.com/centos/wlnmp-release-centos.noarch.rpm
yum install ntpdate -y
 
ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
echo 'Asia/Shanghai' >/etc/timezone
ntpdate time2.aliyun.com
# 加入到crontab
crontab -e
*/5 * * * * /usr/sbin/ntpdate time2.aliyun.com

ulimit -SHn 65535
cat >> /etc/security/limits.conf <<EOF
# 末尾添加如下内容
* soft nofile 65536
* hard nofile 131072
* soft nproc 65535
* hard nproc 655350
* soft memlock unlimited
* hard memlock unlimited
EOF

ssh-keygen -t rsa
 
for i in k8s-etcd01 k8s-etcd02 k8s-etcd03 k8s-master01 k8s-master02 k8s-master03 k8s-node01 k8s-node02;do ssh-copy-id -i .ssh/id_rsa.pub $i;done

for i in k8s-etcd01 k8s-etcd02 k8s-etcd03 k8s-master02 k8s-master03 k8s-node01 k8s-node02;do scp kernel-ml-4.19.12-1.el7.elrepo.x86_64.rpm kernel-ml-devel-4.19.12-1.el7.elrepo.x86_64.rpm $i:/root/ ; done

cd /root && yum localinstall -y kernel-ml*
 
所有节点更改内核启动顺序：
grub2-set-default  0 && grub2-mkconfig -o /etc/grub2.cfg
grubby --args="user_namespace.enable=1" --update-kernel="$(grubby --default-kernel)"
 
检查默认内核是不是4.19
[root@k8s-master02 ~]# grubby --default-kernel
/boot/vmlinuz-4.19.12-1.el7.elrepo.x86_64

modprobe -- ip_vs
modprobe -- ip_vs_rr
modprobe -- ip_vs_wrr
modprobe -- ip_vs_sh
modprobe -- nf_conntrack
# 加入以下内容
cat >> /etc/modules-load.d/ipvs.conf <<EOF 
ip_vs
ip_vs_lc
ip_vs_wlc
ip_vs_rr
ip_vs_wrr
ip_vs_lblc
ip_vs_lblcr
ip_vs_dh
ip_vs_sh
ip_vs_fo
ip_vs_nq
ip_vs_sed
ip_vs_ftp
ip_vs_sh
nf_conntrack
ip_tables
ip_set
xt_set
ipt_set
ipt_rpfilter
ipt_REJECT
ipip
EOF
 
然后执行systemctl enable --now systemd-modules-load.service即可（**报错不用管**）

cat <<EOF > /etc/sysctl.d/k8s.conf
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-iptables = 1
net.bridge.bridge-nf-call-ip6tables = 1
fs.may_detach_mounts = 1
net.ipv4.conf.all.route_localnet = 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
EOF
sysctl --system

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

cat > /etc/crictl.yaml <<EOF
runtime-endpoint: unix:///run/containerd/containerd.sock
image-endpoint: unix:///run/containerd/containerd.sock
timeout: 10
debug: false
EOF

root@k8s-master01 ~]#kubelet --version
Kubernetes v1.28.2
 
[root@k8s-etcd01 ~]#etcdctl version
etcdctl version: 3.5.9
API version: 3.5

ssh-keygen -t rsa
 
for i in k8s-etcd01 k8s-etcd02 k8s-etcd03 K8s-master01 K8s-master02 K8s-master03;do ssh-copy-id -i .ssh/id_rsa.pub $i;done

root@k8s-master01 ~]# kubelet --version
Kubernetes v1.28.0
[root@k8s-master01 ~]# etcdctl version
etcdctl version: 3.5.9
API version: 3.5

MasterNodes='k8s-master02 k8s-master03'
WorkNodes='k8s-node01 k8s-node02'
for NODE in $MasterNodes; do echo $NODE; scp /usr/local/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy} $NODE:/usr/local/bin/; done
for NODE in $WorkNodes; do  echo $NODE;  scp /usr/local/bin/kube{let,-proxy} $NODE:/usr/local/bin/ ; done

EtcdNodes='k8s-etcd01 k8s-etcd02  k8s-etcd03'
for NODE in $EtcdNodes; do echo $NODE; scp /usr/local/bin/etcd* $NODE:/usr/local/bin/; done
 
 
cd /root/ ; git clone https://gitee.com/dukuan/k8s-ha-install.git

wget "https://pkg.cfssl.org/R1.2/cfssl_linux-amd64" -O /usr/local/bin/cfssl
wget "https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64" -O /usr/local/bin/cfssljson
chmod +x /usr/local/bin/cfssl /usr/local/bin/cfssljson

[root@k8s-master01 pki]# cd /root/k8s-ha-install/pki
 
# 生成etcd CA证书和CA证书的key
cfssl gencert -initca etcd-ca-csr.json | cfssljson -bare /etc/etcd/ssl/etcd-ca
2023/11/02 11:11:07 [INFO] generating a new CA key and certificate from CSR
2023/11/02 11:11:07 [INFO] generate received request
2023/11/02 11:11:07 [INFO] received CSR
2023/11/02 11:11:07 [INFO] generating key: rsa-2048
2023/11/02 11:11:08 [INFO] encoded CSR
2023/11/02 11:11:08 [INFO] signed certificate with serial number 75482055310016697730015119953043757658886828630
[root@k8s-etcd01 ~/k8s-ha-install/pki]#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-etcd01,k8s-etcd02,k8s-etcd03,192.168.20.242,192.168.20.243,192.168.20.244 \
    -profile=kubernetes \
    etcd-csr.json | cfssljson -bare /etc/etcd/ssl/etcd
2023/11/02 11:12:21 [INFO] generate received request
2023/11/02 11:12:21 [INFO] received CSR
2023/11/02 11:12:21 [INFO] generating key: rsa-2048
2023/11/02 11:12:21 [INFO] encoded CSR
2023/11/02 11:12:21 [INFO] signed certificate with serial number 236272965234924533562028227670022078874125148345

EtcdNodes='k8s-Etcd02 k8s-Etcd03 k8s-master01 k8s-master02 k8s-master03'
 
 
for NODE in $EtcdNodes; 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

如果不是高可用集群，192.168.20.245为Master01的IP
 
cfssl gencert   -ca=/etc/kubernetes/pki/ca.pem   -ca-key=/etc/kubernetes/pki/ca-key.pem   -config=ca-config.json   -hostname=10.96.0.1,192.168.20.245,127.0.0.1,kubernetes,kubernetes.default,kubernetes.default.svc,kubernetes.default.svc.cluster,kubernetes.default.svc.cluster.local,192.168.20.237,192.168.20.238,192.168.20.239   -profile=kubernetes   apiserver-csr.json | cfssljson -bare /etc/kubernetes/pki/apiserver

cfssl gencert   -initca front-proxy-ca-csr.json | cfssljson -bare /etc/kubernetes/pki/front-proxy-ca 
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

2020/12/11 18:15:28 [INFO] generate received request
2020/12/11 18:15:28 [INFO] received CSR
2020/12/11 18:15:28 [INFO] generating key: rsa-2048
 
2020/12/11 18:15:28 [INFO] encoded CSR
2020/12/11 18:15:28 [INFO] signed certificate with serial number 597484897564859295955894546063479154194995827845
2020/12/11 18:15:28 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").

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
 
# 注意，如果不是高可用集群，192.168.20.245:8443改为master01的地址，8443改为apiserver的端口，默认是6443
# set-cluster：设置一个集群项，
 
kubectl config set-cluster kubernetes \
     --certificate-authority=/etc/kubernetes/pki/ca.pem \
     --embed-certs=true \
     --server=https://192.168.20.245:8443 \
     --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

返回结果
Generating RSA private key, 2048 bit long modulus (2 primes)
...................................................................................+++++
...............+++++
e is 65537 (0x010001)

for NODE in k8s-master02 k8s-master03; 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

[root@k8s-master01 pki]# ls /etc/kubernetes/pki/
admin.csr      apiserver.csr      ca.csr      controller-manager.csr      front-proxy-ca.csr      front-proxy-client.csr      sa.key         scheduler-key.pem
admin-key.pem  apiserver-key.pem  ca-key.pem  controller-manager-key.pem  front-proxy-ca-key.pem  front-proxy-client-key.pem  sa.pub         scheduler.pem
admin.pem      apiserver.pem      ca.pem      controller-manager.pem      front-proxy-ca.pem      front-proxy-client.pem      scheduler.csr
[root@k8s-master01 pki]# ls /etc/kubernetes/pki/ |wc -l

 
cat >/etc/haproxy/haproxy.cfg<<EOF 
global
  maxconn  2000
  ulimit-n  16384
  log  127.0.0.1 local0 err
  stats timeout 30s
 
defaults
  log global
  mode  http
  option  httplog
  timeout connect 5000
  timeout client  50000
  timeout server  50000
  timeout http-request 15s
  timeout http-keep-alive 15s
 
frontend monitor-in
  bind *:33305
  mode http
  option httplog
  monitor-uri /monitor
 
frontend k8s-master
  bind 0.0.0.0:8443
  bind 127.0.0.1:8443
  mode tcp
  option tcplog
  tcp-request inspect-delay 5s
  default_backend k8s-master
 
backend k8s-master
  mode tcp
  option tcplog
  option tcp-check
  balance roundrobin
  default-server inter 10s downinter 5s rise 2 fall 2 slowstart 60s maxconn 250 maxqueue 256 weight 100
  server k8s-master01	192.168.20.237:6443  check
  server k8s-master02	192.168.20.238:6443  check
  server k8s-master03	192.168.20.239:6443  check
EOF

 
cat > /etc/keepalived/keepalived.conf<<EOF 
! Configuration File for keepalived
global_defs {
    router_id LVS_DEVEL
script_user root
    enable_script_security
}
vrrp_script chk_apiserver {
    script "/etc/keepalived/check_apiserver.sh"
    interval 5
    weight -5
    fall 2  
rise 1
}
vrrp_instance VI_1 {
    state MASTER
    interface ens192
    mcast_src_ip 192.168.20.237
    virtual_router_id 51
    priority 101
    advert_int 2
    authentication {
        auth_type PASS
        auth_pass K8SHA_KA_AUTH
    }
    virtual_ipaddress {
        192.168.20.245
    }
    track_script {
       chk_apiserver
    }
}
EOF

cat > /etc/keepalived/keepalived.conf<<EOF 
! Configuration File for keepalived
global_defs {
    router_id LVS_DEVEL
script_user root
    enable_script_security
}
vrrp_script chk_apiserver {
    script "/etc/keepalived/check_apiserver.sh"
   interval 5
    weight -5
    fall 2  
rise 1
}
vrrp_instance VI_1 {
    state BACKUP
    interface ens192
    mcast_src_ip 192.168.20.238
    virtual_router_id 51
    priority 100
    advert_int 2
    authentication {
        auth_type PASS
        auth_pass K8SHA_KA_AUTH
    }
    virtual_ipaddress {
        192.168.20.245
    }
    track_script {
       chk_apiserver
    }
}
EOF

cat > /etc/keepalived/keepalived.conf<<EOF 
! Configuration File for keepalived
global_defs {
    router_id LVS_DEVEL
script_user root
    enable_script_security
}
vrrp_script chk_apiserver {
    script "/etc/keepalived/check_apiserver.sh"
 interval 5
    weight -5
    fall 2  
rise 1
}
vrrp_instance VI_1 {
    state BACKUP
    interface ens192
    mcast_src_ip 192.168.20.239
    virtual_router_id 51
    priority 100
    advert_int 2
    authentication {
        auth_type PASS
        auth_pass K8SHA_KA_AUTH
    }
    virtual_ipaddress {
        192.168.20.245
    }
    track_script {
       chk_apiserver
    }
}
EOF

[root@k8s-master01 keepalived]# 
cat >/etc/keepalived/check_apiserver.sh<<EOF 
#!/bin/bash
 
err=0
for k in $(seq 1 3)
do
    check_code=$(pgrep haproxy)
    if [[ $check_code == "" ]]; then
        err=$(expr $err + 1)
        sleep 1
        continue
    else
        err=0
        break
    fi
done
 
if [[ $err != "0" ]]; then
    echo "systemctl stop keepalived"
    /usr/bin/systemctl stop keepalived
    exit 1
else
    exit 0
fi
EOF
chmod +x /etc/keepalived/check_apiserver.sh

 systemctl daemon-reload
 systemctl enable --now haproxy
 systemctl enable --now keepalived
 
 #所有节点测试VIP
  ping 192.168.20.245 -c 4
  telnet 192.168.20.245 8443

name: 'k8s-etcd01'
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://192.168.20.242:2380'
listen-client-urls: 'https://192.168.20.242:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.20.242:2380'
advertise-client-urls: 'https://192.168.20.242:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-etcd01=https://192.168.20.242:2380,k8s-etcd02=https://192.168.20.243:2380,k8s-etcd03=https://192.168.20.244:2380'
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

name: 'k8s-etcd02'
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://192.168.20.243:2380'
listen-client-urls: 'https://192.168.20.243:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.20.243:2380'
advertise-client-urls: 'https://192.168.20.243:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-etcd01=https://192.168.20.242:2380,k8s-etcd02=https://192.168.20.243:2380,k8s-etcd03=https://192.168.20.244:2380'
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

name: 'k8s-etcd03'
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://192.168.20.244:2380'
listen-client-urls: 'https://192.168.20.244:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.20.244:2380'
advertise-client-urls: 'https://192.168.20.244:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-etcd01=https://192.168.20.242:2380,k8s-etcd02=https://192.168.20.243:2380,k8s-etcd03=https://192.168.20.244:2380'
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

[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

mkdir /etc/kubernetes/pki/etcd
ln -s /etc/etcd/ssl/* /etc/kubernetes/pki/etcd/
systemctl daemon-reload
systemctl enable --now etcd

export ETCDCTL_API=3
etcdctl --endpoints="192.168.20.242:2379,192.168.20.243:2379,192.168.20.244:2379" --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
 
etcdctl --endpoints="192.168.20.242:2379,192.168.20.243:2379,192.168.20.244:2379" --cacert=/etc/kubernetes/pki/etcd/etcd-ca.pem --cert=/etc/kubernetes/pki/etcd/etcd.pem --key=/etc/kubernetes/pki/etcd/etcd-key.pem  endpoint health --write-out=table

[root@k8s-master01 pki]# vim /usr/lib/systemd/system/kube-apiserver.service 
 
[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=192.168.20.237 \
      --service-cluster-ip-range=10.96.0.0/16  \
      --service-node-port-range=30000-32767  \
      --etcd-servers=https://192.168.20.242:2379,https://192.168.20.243:2379,https://192.168.20.244:2379 \
      --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
      # --token-auth-file=/etc/kubernetes/token.csv
 
Restart=on-failure
RestartSec=10s
LimitNOFILE=65535
 
[Install]
WantedBy=multi-user.target

[root@k8s-master01 pki]# vim  /usr/lib/systemd/system/kube-apiserver.service 
 
[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=192.168.20.238 \
      --service-cluster-ip-range=10.96.0.0/16  \
      --service-node-port-range=30000-32767  \
      --etcd-servers=https://192.168.20.242:2379,https://192.168.20.243:2379,https://192.168.20.244:2379 \
      --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
 
Restart=on-failure
RestartSec=10s
LimitNOFILE=65535
 
[Install]
WantedBy=multi-user.target

[root@k8s-master01 pki]# vim  /usr/lib/systemd/system/kube-apiserver.service 
 
[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=192.168.20.239 \
      --service-cluster-ip-range=10.96.0.0/16  \
      --service-node-port-range=30000-32767  \
      --etcd-servers=https://192.168.20.242:2379,https://192.168.20.243:2379,https://192.168.20.244:2379 \
      --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
      # --token-auth-file=/etc/kubernetes/token.csv
 
Restart=on-failure
RestartSec=10s
LimitNOFILE=65535
 
[Install]
WantedBy=multi-user.target

启动apiserver
所有Master节点开启kube-apiserver
systemctl daemon-reload && systemctl enable --now kube-apiserver && systemctl status kube-apiserver

# systemctl status kube-apiserver
 
● kube-apiserver.service - Kubernetes API Server
   Loaded: loaded (/usr/lib/systemd/system/kube-apiserver.service; enabled; vendor preset: disabled)
   Active: active (running) since Sat 2020-08-22 21:26:49 CST; 26s ago

Dec 11 20:51:15 k8s-master01 kube-apiserver: I1211 20:51:15.004739    7450 clientconn.go:948] ClientConn switching balancer to "pick_first"
Dec 11 20:51:15 k8s-master01 kube-apiserver: I1211 20:51:15.004843    7450 balancer_conn_wrappers.go:78] pickfirstBalancer: HandleSubConnStateChange: 0xc011bd4c80, {CONNECTING <nil>}
Dec 11 20:51:15 k8s-master01 kube-apiserver: I1211 20:51:15.010725    7450 balancer_conn_wrappers.go:78] pickfirstBalancer: HandleSubConnStateChange: 0xc011bd4c80, {READY <nil>}
Dec 11 20:51:15 k8s-master01 kube-apiserver: I1211 20:51:15.011370    7450 controlbuf.go:508] transport: loopyWriter.run returning. connection error: desc = "transport is closing"

[root@k8s-master01 pki]# vim /usr/lib/systemd/system/kube-controller-manager.service
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
 
[Service]
ExecStart=/usr/local/bin/kube-controller-manager \
      --v=2 \
      --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 \
      --authentication-kubeconfig=/etc/kubernetes/controller-manager.kubeconfig \
      --authorization-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 \
      --cluster-cidr=172.16.0.0/16 \
      --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \
      --node-cidr-mask-size=24
      
Restart=always
RestartSec=10s
 
[Install]
WantedBy=multi-user.target

[root@k8s-master01 pki]# systemctl daemon-reload
 
[root@k8s-master01 pki]# systemctl enable --now kube-controller-manager
Created symlink /etc/systemd/system/multi-user.target.wants/kube-controller-manager.service → /usr/lib/systemd/system/kube-controller-manager.service.

[root@k8s-master01 pki]# systemctl enable --now kube-controller-manager
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-controller-manager.service to /usr/lib/systemd/system/kube-controller-manager.service.
[root@k8s-master01 pki]# systemctl  status kube-controller-manager
● kube-controller-manager.service - Kubernetes Controller Manager
   Loaded: loaded (/usr/lib/systemd/system/kube-controller-manager.service; enabled; vendor preset: disabled)
   Active: active (running) since Fri 2020-12-11 20:53:05 CST; 8s ago
     Docs: https://github.com/kubernetes/kubernetes
 Main PID: 7518 (kube-controller)

[root@k8s-master01 pki]# vim /usr/lib/systemd/system/kube-scheduler.service 
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
 
[Service]
ExecStart=/usr/local/bin/kube-scheduler \
      --v=2 \
      --leader-elect=true \
      --authentication-kubeconfig=/etc/kubernetes/scheduler.kubeconfig \
      --authorization-kubeconfig=/etc/kubernetes/scheduler.kubeconfig \
      --kubeconfig=/etc/kubernetes/scheduler.kubeconfig
 
Restart=always
RestartSec=10s
 
[Install]
WantedBy=multi-user.target
 
[root@k8s-master01 pki]# systemctl daemon-reload
 
[root@k8s-master01 pki]# systemctl enable --now kube-scheduler
Created symlink /etc/systemd/system/multi-user.target.wants/kube-scheduler.service → /usr/lib/systemd/system/kube-scheduler.service.
[root@k8s-master01 pki]# systemctl status kube-scheduler
● kube-scheduler.service - Kubernetes Scheduler
   Loaded: loaded (/usr/lib/systemd/system/kube-scheduler.service; enabled; vendor preset: disabled)
   Active: active (running) since Wed 2022-05-04 17:31:13 CST; 6s ago
     Docs: https://github.com/kubernetes/kubernetes
 Main PID: 5815 (kube-scheduler)
    Tasks: 9
   Memory: 19.8M

cd /root/k8s-ha-install/bootstrap
kubectl config set-cluster kubernetes     --certificate-authority=/etc/kubernetes/pki/ca.pem     --embed-certs=true     --server=https://192.168.20.245:8443     --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
 
 
 
[root@k8s-master01 bootstrap]# mkdir -p /root/.kube ; cp /etc/kubernetes/admin.kubeconfig /root/.kube/config

# 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":""}
 
 
[root@k8s-master01 bootstrap]# kubectl create -f bootstrap.secret.yaml 
secret/bootstrap-token-c8ad9c created
clusterrolebinding.rbac.authorization.k8s.io/kubelet-bootstrap created
clusterrolebinding.rbac.authorization.k8s.io/node-autoapprove-bootstrap created
clusterrolebinding.rbac.authorization.k8s.io/node-autoapprove-certificate-rotation created
clusterrole.rbac.authorization.k8s.io/system:kube-apiserver-to-kubelet created
clusterrolebinding.rbac.authorization.k8s.io/system:kube-apiserver created

cd /etc/kubernetes/
 
for NODE in k8s-master02 k8s-master03 k8s-node01 k8s-node02; do
     ssh $NODE mkdir -p /etc/kubernetes/pki
     for FILE in pki/ca.pem pki/ca-key.pem pki/front-proxy-ca.pem bootstrap-kubelet.kubeconfig; do
       scp /etc/kubernetes/$FILE $NODE:/etc/kubernetes/${FILE}
 done
 done

[root@k8s-master01 bootstrap]# vim  /usr/lib/systemd/system/kubelet.service
 
[Unit]
Description=Kubernetes Kubelet
Documentation=https://github.com/kubernetes/kubernetes
 
[Service]
ExecStart=/usr/local/bin/kubelet
 
Restart=always
StartLimitInterval=0
RestartSec=10
 
[Install]
WantedBy=multi-user.target

 Runtime为Containerd
# vim /etc/systemd/system/kubelet.service.d/10-kubelet.conf
 
[Service]
Environment="KUBELET_KUBECONFIG_ARGS=--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig --kubeconfig=/etc/kubernetes/kubelet.kubeconfig"
Environment="KUBELET_SYSTEM_ARGS=--container-runtime-endpoint=unix:///run/containerd/containerd.sock"
Environment="KUBELET_CONFIG_ARGS=--config=/etc/kubernetes/kubelet-conf.yml"
Environment="KUBELET_EXTRA_ARGS=--node-labels=node.kubernetes.io/node='' "
ExecStart=
ExecStart=/usr/local/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_CONFIG_ARGS $KUBELET_SYSTEM_ARGS $KUBELET_EXTRA_ARGS

[root@k8s-master01 bootstrap]# vim /etc/kubernetes/kubelet-conf.yml
 
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

cd /root/k8s-ha-install/pki
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
 
# 注意，如果不是高可用集群，192.168.20.245:8443改为master01的地址，8443改为apiserver的端口，默认是6443
 
kubectl config set-cluster kubernetes \
     --certificate-authority=/etc/kubernetes/pki/ca.pem \
     --embed-certs=true \
     --server=https://192.168.20.245:8443 \
     --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
 
 
kubectl config set-credentials system: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 system:kube-proxy@kubernetes \
     --cluster=kubernetes \
     --user=system:kube-proxy \
     --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
 
 
kubectl config use-context system:kube-proxy@kubernetes \
     --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
将kubeconfig发送至其他节点
for NODE in k8s-master02 k8s-master03; do
     scp /etc/kubernetes/kube-proxy.kubeconfig  $NODE:/etc/kubernetes/kube-proxy.kubeconfig
 done
 
for NODE in k8s-node01 k8s-node02; do
     scp /etc/kubernetes/kube-proxy.kubeconfig $NODE:/etc/kubernetes/kube-proxy.kubeconfig
 done

for NODE in k8s-master02 k8s-master03; do
     scp /etc/kubernetes/kube-proxy.kubeconfig  $NODE:/etc/kubernetes/kube-proxy.kubeconfig
 done
 
for NODE in k8s-node01 k8s-node02; do
     scp /etc/kubernetes/kube-proxy.kubeconfig $NODE:/etc/kubernetes/kube-proxy.kubeconfig
 done

vim /usr/lib/systemd/system/kube-proxy.service
 
[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

vim /etc/kubernetes/kube-proxy.yaml
 
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: 172.16.0.0/16 
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

[root@k8s-master01 ~/k8s-ha-install/calico]#kubectl get nodes -owide
NAME           STATUS   ROLES    AGE   VERSION   INTERNAL-IP      EXTERNAL-IP   OS-IMAGE                KERNEL-VERSION                CONTAINER-RUNTIME
k8s-master01   Ready    <none>   10m   v1.28.2   192.168.20.237   <none>        CentOS Linux 7 (Core)   4.19.12-1.el7.elrepo.x86_64   containerd://1.6.24
k8s-master02   Ready    <none>   10m   v1.28.2   192.168.20.238   <none>        CentOS Linux 7 (Core)   4.19.12-1.el7.elrepo.x86_64   containerd://1.6.24
k8s-master03   Ready    <none>   10m   v1.28.2   192.168.20.239   <none>        CentOS Linux 7 (Core)   4.19.12-1.el7.elrepo.x86_64   containerd://1.6.24
k8s-node01     Ready    <none>   10m   v1.28.2   192.168.20.240   <none>        CentOS Linux 7 (Core)   4.19.12-1.el7.elrepo.x86_64   containerd://1.6.24
k8s-node02     Ready    <none>   10m   v1.28.2   192.168.20.241   <none>        CentOS Linux 7 (Core)   4.19.12-1.el7.elrepo.x86_64   containerd://1.6.24

Kubectl logs -f POD_NAME -n kube-system
 
Kubectl logs -f POD_NAME -c upgrade-ipam -n kube-system

COREDNS_SERVICE_IP=`kubectl get svc | grep kubernetes | awk '{print $3}'`0
 
sed -i "s#KUBEDNS_SERVICE_IP#${COREDNS_SERVICE_IP}#g" CoreDNS/coredns.yaml

[root@k8s-master01 k8s-ha-install]# kubectl  create -f CoreDNS/coredns.yaml 
serviceaccount/coredns created
clusterrole.rbac.authorization.k8s.io/system:coredns created
clusterrolebinding.rbac.authorization.k8s.io/system:coredns created
configmap/coredns created
deployment.apps/coredns created
service/kube-dns created

cd /root/k8s-ha-install/metrics-server
kubectl  create -f comp.yaml
 
serviceaccount/metrics-server created
clusterrole.rbac.authorization.k8s.io/system:aggregated-metrics-reader created
clusterrole.rbac.authorization.k8s.io/system:metrics-server created
rolebinding.rbac.authorization.k8s.io/metrics-server-auth-reader created
clusterrolebinding.rbac.authorization.k8s.io/metrics-server:system:auth-delegator created
clusterrolebinding.rbac.authorization.k8s.io/system:metrics-server created
service/metrics-server created
deployment.apps/metrics-server created
apiservice.apiregistration.k8s.io/v1beta1.metrics.k8s.io created

kubectl  top node
NAME      CPU(cores)  CPU%  MEMORY(bytes)  MEMORY%  
k8s-master01  231m     5%   1620Mi      42%    
k8s-master02  274m     6%   1203Mi      31%    
k8s-master03  202m     5%   1251Mi      32%    
k8s-node01   69m      1%   667Mi      17%    
k8s-node02   73m      1%   650Mi      16%

cd /root/k8s-ha-install/dashboard/
 
[root@k8s-master01 dashboard]#kubectl  create -f .
serviceaccount/admin-user created
clusterrolebinding.rbac.authorization.k8s.io/admin-user created
namespace/kubernetes-dashboard created
serviceaccount/kubernetes-dashboard created
service/kubernetes-dashboard created
secret/kubernetes-dashboard-certs created
secret/kubernetes-dashboard-csrf created
secret/kubernetes-dashboard-key-holder created
configmap/kubernetes-dashboard-settings created
role.rbac.authorization.k8s.io/kubernetes-dashboard created
clusterrole.rbac.authorization.k8s.io/kubernetes-dashboard created
rolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created
clusterrolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created
deployment.apps/kubernetes-dashboard created
service/dashboard-metrics-scraper created
deployment.apps/dashboard-metrics-scraper create

kubectl edit svc kubernetes-dashboard -n kubernetes-dashboard
 
 
apiVersion: v1
kind: Service
metadata:
  creationTimestamp: "2023-11-03T03:19:04Z"
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard
  namespace: kubernetes-dashboard
  resourceVersion: "7845"
  uid: 7373a929-7b4a-445b-b9cb-05c016372cad
spec:
  clusterIP: 10.96.182.67
  clusterIPs:
  - 10.96.182.67
  externalTrafficPolicy: Cluster
  internalTrafficPolicy: Cluster
  ipFamilies:
  - IPv4
  ipFamilyPolicy: SingleStack
  ports:
  - nodePort: 30963
    port: 443
    protocol: TCP
    targetPort: 8443
  selector:
    k8s-app: kubernetes-dashboard
  sessionAffinity: None
  type: NodePort
status:
  loadBalancer: {}
 
查看端口号：
kubectl get svc kubernetes-dashboard -n kubernetes-dashboard
 
kubectl get svc kubernetes-dashboard -n kubernetes-dashboard
NAME                   TYPE       CLUSTER-IP     EXTERNAL-IP   PORT(S)         AGE
kubernetes-dashboard   NodePort   10.96.182.67   <none>        443:30963/TCP   4m2s

kubectl create token admin-user -n kube-system
 
kubectl create token admin-user -n kube-system
eyJhbGciOiJSUzI1NiIsImtpZCI6Ino5ZGN2R1VBNGRVSGNEbjU4bER1Nk5ESTFBdmQ2WXhIeHJ2MHpMVmJ3VDgifQ.eyJhdWQiOlsiaHR0cHM6Ly9rdWJlcm5ldGVzLmRlZmF1bHQuc3ZjLmNsdXN0ZXIubG9jYWwiXSwiZXhwIjoxNjk4OTg1ODcwLCJpYXQiOjE2OTg5ODIyNzAsImlzcyI6Imh0dHBzOi8va3ViZXJuZXRlcy5kZWZhdWx0LnN2Yy5jbHVzdGVyLmxvY2FsIiwia3ViZXJuZXRlcy5pbyI6eyJuYW1lc3BhY2UiOiJrdWJlLXN5c3RlbSIsInNlcnZpY2VhY2NvdW50Ijp7Im5hbWUiOiJhZG1pbi11c2VyIiwidWlkIjoiMTA2NGQ4YzMtODBlNS00OTRiLWJiMDUtMTMzMWFmZTFhMjk3In19LCJuYmYiOjE2OTg5ODIyNzAsInN1YiI6InN5c3RlbTpzZXJ2aWNlYWNjb3VudDprdWJlLXN5c3RlbTphZG1pbi11c2VyIn0.QC85f00PQ_2yHbu3-37HpuaRnJ2jCACRp2LoZ7aca03DRa4SR1Im8CT3f6MKbIAUU71seKPZgSHzTUdGkQi4_NlapM_EG9FhDITVjpOO74ZFzb8Lmt6RsunN_fHjy33RaJKSgFijSYqeY67cJvSL7K_CahA3h0NPRG11_14DMA1sM7phImg61z9w_hJ2ec4YcTzU_evH5SqTiJtTOEKcWoeTdWQWzeimYd9PbThDHCeRW4_lIAYA2GkJ6uHVSSW0BYk3Cpz0FFifzlTE6YJIDLgxse75U5M-ch32CjfC7uzUrYuaph8eswZhIprBCiQtK7oon54BsRB0xWfctUgb9g
You have new mail in /var/spool/mail/root

[root@k8s-master01 ~/k8s-ha-install/dashboard]#kubectl get pod -owide
NAME        READY   STATUS    RESTARTS   AGE   IP               NODE           NOMINATED NODE   READINESS GATES
net-test1   1/1     Running   0          36m   172.16.122.130   k8s-master02   <none>           <none>
net-test2   1/1     Running   0          35m   172.16.32.130    k8s-master01   <none>           <none>
net-test3   1/1     Running   0          31m   172.16.85.194    k8s-node01     <none>           <none>
net-test4   1/1     Running   0          31m   172.16.195.2     k8s-master03   <none>           <none>
net-test5   1/1     Running   0          31m   172.16.58.194    k8s-node02     <none>           <none>
二进制部署 默认没污点所以master也调度了pod

kubectl describe node k8s-master01
Name:               k8s-master01
Roles:              <none>
Labels:             beta.kubernetes.io/arch=amd64
                    beta.kubernetes.io/os=linux
                    kubernetes.io/arch=amd64
                    kubernetes.io/hostname=k8s-master01
                    kubernetes.io/os=linux
                    node.kubernetes.io/node=
Annotations:        node.alpha.kubernetes.io/ttl: 0
                    projectcalico.org/IPv4Address: 192.168.20.237/24
                    projectcalico.org/IPv4IPIPTunnelAddr: 172.16.32.128
                    volumes.kubernetes.io/controller-managed-attach-detach: true
CreationTimestamp:  Fri, 03 Nov 2023 10:52:16 +0800
Taints:             <none> 污点为空
Unschedulable:      false
Lease:
  HolderIdentity:  k8s-master01

增加污点
kubectl taint nodes k8s-master01 master-role.kubernetes.io/master=:NoSchedule
删除污点
kubectl taint nodes k8s-master01 master-role.kubernetes.io/master=:NoSchedule-

Name:               k8s-master01
Roles:              <none>
Labels:             beta.kubernetes.io/arch=amd64
                    beta.kubernetes.io/os=linux
                    kubernetes.io/arch=amd64
                    kubernetes.io/hostname=k8s-master01
                    kubernetes.io/os=linux
                    node.kubernetes.io/node=
Annotations:        node.alpha.kubernetes.io/ttl: 0
                    projectcalico.org/IPv4Address: 192.168.20.237/24
                    projectcalico.org/IPv4IPIPTunnelAddr: 172.16.32.128
                    volumes.kubernetes.io/controller-managed-attach-detach: true
CreationTimestamp:  Fri, 03 Nov 2023 10:52:16 +0800
Taints:             master-role.kubernetes.io/master:NoSchedule
Unschedulable:      false
Lease:
  HolderIdentity:  k8s-master01
  AcquireTime