kubeadm部署指定版本的K8s+containerd+docker——图文详细版（下）
本次安装主要是用来学习kubernetes指定版本安装的相关过程及组件的配置，若用于企业实践可根据具体需要在节点添加相应的组件前面文章给出了如何在物理机上安装centos操作系统——具体可参考安装配置centos7虚拟机（详精版）安装虚拟机，或者参考物理机安装centos7(u盘安装）——详细版配置物理机， 参考MobaXterm连接局域网的虚拟机连接虚拟机，也可直接操作虚拟机。（小白可直接参考本
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看该文章前请先看完上半部分
kubeadm部署指定版本的K8s+containerd+docker——图文详细版（上）
接上文内容，完成K8s+Dockerd的安装
安装指定版本的K8s
1、本文通过Kubeadm安装K8s，安装 Kubeadm 本文通过指定yum 源的方式进行安装，使用阿里云的源（两台都需要）
cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
http://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF列出所有可安装的版本
yum --showduplicates list kubeadm
[root@master ~]# yum --showduplicates list kubeadm
已加载插件：fastestmirror, langpacks
Loading mirror speeds from cached hostfile
* base: mirrors.aliyun.com
* elrepo: mirrors.tuna.tsinghua.edu.cn
* extras: mirrors.nju.edu.cn
* updates: mirrors.aliyun.com
可安装的软件包
kubeadm.x86_64 1.6.0-0 kubernetes
kubeadm.x86_64 1.6.1-0 kubernetes
kubeadm.x86_64 1.6.2-0 kubernetes
kubeadm.x86_64 1.6.3-0 kubernetes
kubeadm.x86_64 1.6.4-0 kubernetes
kubeadm.x86_64 1.6.5-0 kubernetes
kubeadm.x86_64 1.6.6-0 kubernetes
kubeadm.x86_64 1.6.7-0 kubernetes
kubeadm.x86_64 1.6.8-0 kubernetes
kubeadm.x86_64 1.6.9-0 kubernetes
kubeadm.x86_64 1.6.10-0 kubernetes
kubeadm.x86_64 1.6.11-0 kubernetes
kubeadm.x86_64 1.6.12-0 kubernetes
kubeadm.x86_64 1.6.13-0 kubernetes
kubeadm.x86_64 1.7.0-0 kubernetes
kubeadm.x86_64 1.7.1-0 kubernetes
kubeadm.x86_64 1.7.2-0 kubernetes
kubeadm.x86_64 1.7.3-1 kubernetes
kubeadm.x86_64 1.7.4-0 kubernetes
kubeadm.x86_64 1.7.5-0 kubernetes
kubeadm.x86_64 1.7.6-1 kubernetes
kubeadm.x86_64 1.7.7-1 kubernetes
kubeadm.x86_64 1.7.8-1 kubernetes
kubeadm.x86_64 1.7.9-0 kubernetes
kubeadm.x86_64 1.7.10-0 kubernetes
kubeadm.x86_64 1.7.11-0 kubernetes
kubeadm.x86_64 1.7.14-0 kubernetes
kubeadm.x86_64 1.7.15-0 kubernetes
kubeadm.x86_64 1.7.16-0 kubernetes
kubeadm.x86_64 1.8.0-0 kubernetes
kubeadm.x86_64 1.8.0-1 kubernetes
kubeadm.x86_64 1.8.1-0 kubernetes
kubeadm.x86_64 1.8.2-0 kubernetes
kubeadm.x86_64 1.8.3-0 kubernetes
kubeadm.x86_64 1.8.4-0 kubernetes
kubeadm.x86_64 1.8.5-0 kubernetes
kubeadm.x86_64 1.8.6-0 kubernetes
kubeadm.x86_64 1.8.7-0 kubernetes
kubeadm.x86_64 1.8.8-0 kubernetes
kubeadm.x86_64 1.8.9-0 kubernetes
kubeadm.x86_64 1.8.10-0 kubernetes
kubeadm.x86_64 1.8.11-0 kubernetes
kubeadm.x86_64 1.8.12-0 kubernetes
kubeadm.x86_64 1.8.13-0 kubernetes
kubeadm.x86_64 1.8.14-0 kubernetes
kubeadm.x86_64 1.8.15-0 kubernetes
kubeadm.x86_64 1.9.0-0 kubernetes
kubeadm.x86_64 1.9.1-0 kubernetes
kubeadm.x86_64 1.9.2-0 kubernetes
kubeadm.x86_64 1.9.3-0 kubernetes
kubeadm.x86_64 1.9.4-0 kubernetes
kubeadm.x86_64 1.9.5-0 kubernetes
kubeadm.x86_64 1.9.6-0 kubernetes
kubeadm.x86_64 1.9.7-0 kubernetes
kubeadm.x86_64 1.9.8-0 kubernetes
kubeadm.x86_64 1.9.9-0 kubernetes
kubeadm.x86_64 1.9.10-0 kubernetes
kubeadm.x86_64 1.9.11-0 kubernetes
kubeadm.x86_64 1.10.0-0 kubernetes
kubeadm.x86_64 1.10.1-0 kubernetes
kubeadm.x86_64 1.10.2-0 kubernetes
kubeadm.x86_64 1.10.3-0 kubernetes
kubeadm.x86_64 1.10.4-0 kubernetes
kubeadm.x86_64 1.10.5-0 kubernetes
kubeadm.x86_64 1.10.6-0 kubernetes
kubeadm.x86_64 1.10.7-0 kubernetes
kubeadm.x86_64 1.10.8-0 kubernetes
kubeadm.x86_64 1.10.9-0 kubernetes
kubeadm.x86_64 1.10.10-0 kubernetes
kubeadm.x86_64 1.10.11-0 kubernetes
kubeadm.x86_64 1.10.12-0 kubernetes
kubeadm.x86_64 1.10.13-0 kubernetes
kubeadm.x86_64 1.11.0-0 kubernetes
kubeadm.x86_64 1.11.1-0 kubernetes
kubeadm.x86_64 1.11.2-0 kubernetes
kubeadm.x86_64 1.11.3-0 kubernetes
kubeadm.x86_64 1.11.4-0 kubernetes
kubeadm.x86_64 1.11.5-0 kubernetes
kubeadm.x86_64 1.11.6-0 kubernetes
kubeadm.x86_64 1.11.7-0 kubernetes
kubeadm.x86_64 1.11.8-0 kubernetes
kubeadm.x86_64 1.11.9-0 kubernetes
kubeadm.x86_64 1.11.10-0 kubernetes
kubeadm.x86_64 1.12.0-0 kubernetes
kubeadm.x86_64 1.12.1-0 kubernetes
kubeadm.x86_64 1.12.2-0 kubernetes
kubeadm.x86_64 1.12.3-0 kubernetes
kubeadm.x86_64 1.12.4-0 kubernetes
kubeadm.x86_64 1.12.5-0 kubernetes
kubeadm.x86_64 1.12.6-0 kubernetes
kubeadm.x86_64 1.12.7-0 kubernetes
kubeadm.x86_64 1.12.8-0 kubernetes
kubeadm.x86_64 1.12.9-0 kubernetes
kubeadm.x86_64 1.12.10-0 kubernetes
kubeadm.x86_64 1.13.0-0 kubernetes
kubeadm.x86_64 1.13.1-0 kubernetes
kubeadm.x86_64 1.13.2-0 kubernetes
kubeadm.x86_64 1.13.3-0 kubernetes
kubeadm.x86_64 1.13.4-0 kubernetes
kubeadm.x86_64 1.13.5-0 kubernetes
kubeadm.x86_64 1.13.6-0 kubernetes
kubeadm.x86_64 1.13.7-0 kubernetes
kubeadm.x86_64 1.13.8-0 kubernetes
kubeadm.x86_64 1.13.9-0 kubernetes
kubeadm.x86_64 1.13.10-0 kubernetes
kubeadm.x86_64 1.13.11-0 kubernetes
kubeadm.x86_64 1.13.12-0 kubernetes
kubeadm.x86_64 1.14.0-0 kubernetes
kubeadm.x86_64 1.14.1-0 kubernetes
kubeadm.x86_64 1.14.2-0 kubernetes
kubeadm.x86_64 1.14.3-0 kubernetes
kubeadm.x86_64 1.14.4-0 kubernetes
kubeadm.x86_64 1.14.5-0 kubernetes
kubeadm.x86_64 1.14.6-0 kubernetes
kubeadm.x86_64 1.14.7-0 kubernetes
kubeadm.x86_64 1.14.8-0 kubernetes
kubeadm.x86_64 1.14.9-0 kubernetes
kubeadm.x86_64 1.14.10-0 kubernetes
kubeadm.x86_64 1.15.0-0 kubernetes
kubeadm.x86_64 1.15.1-0 kubernetes
kubeadm.x86_64 1.15.2-0 kubernetes
kubeadm.x86_64 1.15.3-0 kubernetes
kubeadm.x86_64 1.15.4-0 kubernetes
kubeadm.x86_64 1.15.5-0 kubernetes
kubeadm.x86_64 1.15.6-0 kubernetes
kubeadm.x86_64 1.15.7-0 kubernetes
kubeadm.x86_64 1.15.8-0 kubernetes
kubeadm.x86_64 1.15.9-0 kubernetes
kubeadm.x86_64 1.15.10-0 kubernetes
kubeadm.x86_64 1.15.11-0 kubernetes
kubeadm.x86_64 1.15.12-0 kubernetes
kubeadm.x86_64 1.16.0-0 kubernetes
kubeadm.x86_64 1.16.1-0 kubernetes
kubeadm.x86_64 1.16.2-0 kubernetes
kubeadm.x86_64 1.16.3-0 kubernetes
kubeadm.x86_64 1.16.4-0 kubernetes
kubeadm.x86_64 1.16.5-0 kubernetes
kubeadm.x86_64 1.16.6-0 kubernetes
kubeadm.x86_64 1.16.7-0 kubernetes
kubeadm.x86_64 1.16.8-0 kubernetes
kubeadm.x86_64 1.16.9-0 kubernetes
kubeadm.x86_64 1.16.10-0 kubernetes
kubeadm.x86_64 1.16.11-0 kubernetes
kubeadm.x86_64 1.16.11-1 kubernetes
kubeadm.x86_64 1.16.12-0 kubernetes
kubeadm.x86_64 1.16.13-0 kubernetes
kubeadm.x86_64 1.16.14-0 kubernetes
kubeadm.x86_64 1.16.15-0 kubernetes
kubeadm.x86_64 1.17.0-0 kubernetes
kubeadm.x86_64 1.17.1-0 kubernetes
kubeadm.x86_64 1.17.2-0 kubernetes
kubeadm.x86_64 1.17.3-0 kubernetes
kubeadm.x86_64 1.17.4-0 kubernetes
kubeadm.x86_64 1.17.5-0 kubernetes
kubeadm.x86_64 1.17.6-0 kubernetes
kubeadm.x86_64 1.17.7-0 kubernetes
kubeadm.x86_64 1.17.7-1 kubernetes
kubeadm.x86_64 1.17.8-0 kubernetes
kubeadm.x86_64 1.17.9-0 kubernetes
kubeadm.x86_64 1.17.11-0 kubernetes
kubeadm.x86_64 1.17.12-0 kubernetes
kubeadm.x86_64 1.17.13-0 kubernetes
kubeadm.x86_64 1.17.14-0 kubernetes
kubeadm.x86_64 1.17.15-0 kubernetes
kubeadm.x86_64 1.17.16-0 kubernetes
kubeadm.x86_64 1.17.17-0 kubernetes
kubeadm.x86_64 1.18.0-0 kubernetes
kubeadm.x86_64 1.18.1-0 kubernetes
kubeadm.x86_64 1.18.2-0 kubernetes
kubeadm.x86_64 1.18.3-0 kubernetes
kubeadm.x86_64 1.18.4-0 kubernetes
kubeadm.x86_64 1.18.4-1 kubernetes
kubeadm.x86_64 1.18.5-0 kubernetes
kubeadm.x86_64 1.18.6-0 kubernetes
kubeadm.x86_64 1.18.8-0 kubernetes
kubeadm.x86_64 1.18.9-0 kubernetes
kubeadm.x86_64 1.18.10-0 kubernetes
kubeadm.x86_64 1.18.12-0 kubernetes
kubeadm.x86_64 1.18.13-0 kubernetes
kubeadm.x86_64 1.18.14-0 kubernetes
kubeadm.x86_64 1.18.15-0 kubernetes
kubeadm.x86_64 1.18.16-0 kubernetes
kubeadm.x86_64 1.18.17-0 kubernetes
kubeadm.x86_64 1.18.18-0 kubernetes
kubeadm.x86_64 1.18.19-0 kubernetes
kubeadm.x86_64 1.18.20-0 kubernetes
kubeadm.x86_64 1.19.0-0 kubernetes
kubeadm.x86_64 1.19.1-0 kubernetes
kubeadm.x86_64 1.19.2-0 kubernetes
kubeadm.x86_64 1.19.3-0 kubernetes
kubeadm.x86_64 1.19.4-0 kubernetes
kubeadm.x86_64 1.19.5-0 kubernetes
kubeadm.x86_64 1.19.6-0 kubernetes
kubeadm.x86_64 1.19.7-0 kubernetes
kubeadm.x86_64 1.19.8-0 kubernetes
kubeadm.x86_64 1.19.9-0 kubernetes
kubeadm.x86_64 1.19.10-0 kubernetes
kubeadm.x86_64 1.19.11-0 kubernetes
kubeadm.x86_64 1.19.12-0 kubernetes
kubeadm.x86_64 1.19.13-0 kubernetes
kubeadm.x86_64 1.19.14-0 kubernetes
kubeadm.x86_64 1.19.15-0 kubernetes
kubeadm.x86_64 1.19.16-0 kubernetes
kubeadm.x86_64 1.20.0-0 kubernetes
kubeadm.x86_64 1.20.1-0 kubernetes
kubeadm.x86_64 1.20.2-0 kubernetes
kubeadm.x86_64 1.20.4-0 kubernetes
kubeadm.x86_64 1.20.5-0 kubernetes
kubeadm.x86_64 1.20.6-0 kubernetes
kubeadm.x86_64 1.20.7-0 kubernetes
kubeadm.x86_64 1.20.8-0 kubernetes
kubeadm.x86_64 1.20.9-0 kubernetes
kubeadm.x86_64 1.20.10-0 kubernetes
kubeadm.x86_64 1.20.11-0 kubernetes
kubeadm.x86_64 1.20.12-0 kubernetes
kubeadm.x86_64 1.20.13-0 kubernetes
kubeadm.x86_64 1.20.14-0 kubernetes
kubeadm.x86_64 1.20.15-0 kubernetes
kubeadm.x86_64 1.21.0-0 kubernetes
kubeadm.x86_64 1.21.1-0 kubernetes
kubeadm.x86_64 1.21.2-0 kubernetes
kubeadm.x86_64 1.21.3-0 kubernetes
kubeadm.x86_64 1.21.4-0 kubernetes
kubeadm.x86_64 1.21.5-0 kubernetes
kubeadm.x86_64 1.21.6-0 kubernetes
kubeadm.x86_64 1.21.7-0 kubernetes
kubeadm.x86_64 1.21.8-0 kubernetes
kubeadm.x86_64 1.21.9-0 kubernetes
kubeadm.x86_64 1.21.10-0 kubernetes
kubeadm.x86_64 1.21.11-0 kubernetes
kubeadm.x86_64 1.21.12-0 kubernetes
kubeadm.x86_64 1.21.13-0 kubernetes
kubeadm.x86_64 1.21.14-0 kubernetes
kubeadm.x86_64 1.22.0-0 kubernetes
kubeadm.x86_64 1.22.1-0 kubernetes
kubeadm.x86_64 1.22.2-0 kubernetes
kubeadm.x86_64 1.22.3-0 kubernetes
kubeadm.x86_64 1.22.4-0 kubernetes
kubeadm.x86_64 1.22.5-0 kubernetes
kubeadm.x86_64 1.22.6-0 kubernetes
kubeadm.x86_64 1.22.7-0 kubernetes
kubeadm.x86_64 1.22.8-0 kubernetes
kubeadm.x86_64 1.22.9-0 kubernetes
kubeadm.x86_64 1.22.10-0 kubernetes
kubeadm.x86_64 1.22.11-0 kubernetes
kubeadm.x86_64 1.22.12-0 kubernetes
kubeadm.x86_64 1.23.0-0 kubernetes
kubeadm.x86_64 1.23.1-0 kubernetes
kubeadm.x86_64 1.23.2-0 kubernetes
kubeadm.x86_64 1.23.3-0 kubernetes
kubeadm.x86_64 1.23.4-0 kubernetes
kubeadm.x86_64 1.23.5-0 kubernetes
kubeadm.x86_64 1.23.6-0 kubernetes
kubeadm.x86_64 1.23.7-0 kubernetes
kubeadm.x86_64 1.23.8-0 kubernetes
kubeadm.x86_64 1.23.9-0 kubernetes
kubeadm.x86_64 1.24.0-0 kubernetes
kubeadm.x86_64 1.24.1-0 kubernetes
kubeadm.x86_64 1.24.2-0 kubernetes
kubeadm.x86_64 1.24.3-0 kubernetes2、安装指定版本（两台都需要）
yum -y install kubeadm-版本号 kubectl-版本号 kubelet-版本号如本文以1.20.5为例
yum -y install kubeadm-1.20.5 kubectl-1.20.5 kubelet-1.20.5[root@node1 ~]# yum install -y kubelet-1.20.5 kubeadm-1.20.5 kubectl-1.20.5
已加载插件：fastestmirror, langpacks
Loading mirror speeds from cached hostfile
* base: mirrors.aliyun.com
* elrepo: mirrors.tuna.tsinghua.edu.cn
* extras: mirrors.ustc.edu.cn
* updates: mirrors.aliyun.com
kubernetes | 1.4 kB 00:00:00
正在解决依赖关系
--> 正在检查事务
---> 软件包 kubeadm.x86_64.0.1.20.5-0 将被 安装
--> 正在处理依赖关系 kubernetes-cni >= 0.8.6，它被软件包 kubeadm-1.20.5-0.x86_64 需要
---> 软件包 kubectl.x86_64.0.1.20.5-0 将被 安装
---> 软件包 kubelet.x86_64.0.1.20.5-0 将被 安装
--> 正在检查事务
---> 软件包 kubernetes-cni.x86_64.0.0.8.7-0 将被 安装
--> 解决依赖关系完成
依赖关系解决
==============================================================================================================================
Package 架构 版本 源 大小
==============================================================================================================================
正在安装:
kubeadm x86_64 1.20.5-0 kubernetes 8.3 M
kubectl x86_64 1.20.5-0 kubernetes 8.5 M
kubelet x86_64 1.20.5-0 kubernetes 20 M
为依赖而安装:
kubernetes-cni x86_64 0.8.7-0 kubernetes 19 M
事务概要
==============================================================================================================================
安装 3 软件包 (+1 依赖软件包)
总下载量：56 M
安装大小：240 M
Downloading packages:
(1/4): c2634321e0d8ebe24ba7c6f025df171f5d1707c75a90e3bdd08199ab47aac565-kubeadm-1.20.5-0.x86_64.rpm | 8.3 MB 00:00:17
(2/4): 8593f28d972a6818131c1a6cd34f52b22a6acd0c4c7dcf3d7447ad53a9f24cc3-kubectl-1.20.5-0.x86_64.rpm | 8.5 MB 00:00:17
(3/4): db7cb5cb0b3f6875f54d10f02e625573988e3e91fd4fc5eef0b1876bb18604ad-kubernetes-cni-0.8.7-0.x86_64. | 19 MB 00:00:37
(4/4): 356e511f8963b4b68fdf41593e64e92f03f0b58c72aae0613aeff3e770078cf7-kubelet-1.20.5-0.x86_64.rpm | 20 MB 00:00:41
------------------------------------------------------------------------------------------------------------------------------
总计 955 kB/s | 56 MB 00:00:59
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
正在安装 : kubernetes-cni-0.8.7-0.x86_64 1/4
正在安装 : kubelet-1.20.5-0.x86_64 2/4
正在安装 : kubectl-1.20.5-0.x86_64 3/4
正在安装 : kubeadm-1.20.5-0.x86_64 4/4
验证中 : kubectl-1.20.5-0.x86_64 1/4
验证中 : kubelet-1.20.5-0.x86_64 2/4
验证中 : kubeadm-1.20.5-0.x86_64 3/4
验证中 : kubernetes-cni-0.8.7-0.x86_64 4/4
已安装:
kubeadm.x86_64 0:1.20.5-0 kubectl.x86_64 0:1.20.5-0 kubelet.x86_64 0:1.20.5-0
作为依赖被安装:
kubernetes-cni.x86_64 0:0.8.7-0
完毕！3、安装完成，配置容器运行时
crictl config runtime-endpoint /run/containerd/containerd.sock设置kubelet开机启动
systemctl daemon-reload && systemctl enable kubelet && systemctl start kubelet现在查询kubelet，这里kubelet出现错误，查看kubelet日志和系统日志
[root@master ~]# crictl config runtime-endpoint /run/containerd/containerd.sock
[root@master ~]# systemctl daemon-reload && systemctl enable kubelet && systemctl start kubelet
Created symlink from /etc/systemd/system/multi-user.target.wants/kubelet.service to /usr/lib/systemd/system/kubelet.service.
[root@master ~]# systemctl status kubelet
● kubelet.service - kubelet: The Kubernetes Node Agent
Loaded: loaded (/usr/lib/systemd/system/kubelet.service; enabled; vendor preset: disabled)
Drop-In: /usr/lib/systemd/system/kubelet.service.d
└─10-kubeadm.conf
Active: activating (auto-restart) (Result: exit-code) since 日 2022-07-31 15:44:40 CST; 1s ago
Docs: https://kubernetes.io/docs/
Process: 9917 ExecStart=/usr/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_CONFIG_ARGS $KUBELET_KUBEADM_ARGS $KUBELET_EXTRA_ARGS (code=exited, status=255)
Main PID: 9917 (code=exited, status=255)
7月 31 15:44:40 master systemd[1]: kubelet.service: main process exited, code=exited, status=255/n/a
7月 31 15:44:40 master systemd[1]: Unit kubelet.service entered failed state.
7月 31 15:44:40 master systemd[1]: kubelet.service failed.错误日志如下
[root@node1 ~]# systemctl status kubelet
● kubelet.service - kubelet: The Kubernetes Node Agent
Loaded: loaded (/usr/lib/systemd/system/kubelet.service; enabled; vendor preset: disabled)
Drop-In: /usr/lib/systemd/system/kubelet.service.d
└─10-kubeadm.conf
Active: activating (auto-restart) (Result: exit-code) since 日 2022-07-31 23:26:57 CST; 2s ago
Docs: https://kubernetes.io/docs/
Process: 20935 ExecStart=/usr/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_CONFIG_ARGS $KUBELET_KUBEADM_ARGS $KUBELET_EXTRA_ARGS (code=exited, status=255)
Main PID: 20935 (code=exited, status=255)
7月 31 23:26:57 node1 systemd[1]: kubelet.service failed.解决方案在下一篇文章中具体给出
4、初始化Master（仅在mster节点执行）
生成master 节点配置 kubeadm 的初始化文件
kubeadm config print init-defaults > kubeadm.yaml修改完成的配置文件如下
[root@master ~]# cat kubeadm.yaml
apiVersion: kubeadm.k8s.io/v1beta2
bootstrapTokens:
- groups:
- system:bootstrappers:kubeadm:default-node-token
token: abcdef.0123456789abcdef
ttl: 24h0m0s
usages:
- signing
- authentication
kind: InitConfiguration
localAPIEndpoint:
advertiseAddress: 192.168.110.129
bindPort: 6443
nodeRegistration:
criSocket: /run/containerd/containerd.sock
name: master
taints:
- effect: NoSchedule
key: node-role.kubernetes.io/master
---
apiServer:
timeoutForControlPlane: 4m0s
apiVersion: kubeadm.k8s.io/v1beta2
certificatesDir: /etc/kubernetes/pki
clusterName: kubernetes
controllerManager: {}
dns:
type: CoreDNS
etcd:
local:
dataDir: /var/lib/etcd
imageRepository: registry.cn-hangzhou.aliyuncs.com/google_containers
kind: ClusterConfiguration
kubernetesVersion: v1.20.5
networking:
dnsDomain: cluster.local
serviceSubnet: 10.96.0.0/12
scheduler: {}需要修改如下配置
vim kubeadm.yamlIP地址修改为自己主机IP，本文为192.168.110.129
默认拉取镜像地址k8s.gcr.io国内无法访问，指定为阿里云镜像仓库地址
Cri由默认的dockers改为Containerd
版本改为1.20.5，本文执行时为1.20.0
修改完成:wq保存并退出
[root@master ~]# vim kubeadm.yaml
[root@master ~]# cat kubeadm.yaml
apiVersion: kubeadm.k8s.io/v1beta2
bootstrapTokens:
- groups:
- system:bootstrappers:kubeadm:default-node-token
token: abcdef.0123456789abcdef
ttl: 24h0m0s
usages:
- signing
- authentication
kind: InitConfiguration
localAPIEndpoint:
advertiseAddress: 192.168.110.129
bindPort: 6443
nodeRegistration:
criSocket: /run/containerd/containerd.sock
name: master
taints:
- effect: NoSchedule
key: node-role.kubernetes.io/master
---
apiServer:
timeoutForControlPlane: 4m0s
apiVersion: kubeadm.k8s.io/v1beta2
certificatesDir: /etc/kubernetes/pki
clusterName: kubernetes
controllerManager: {}
dns:
type: CoreDNS
etcd:
local:
dataDir: /var/lib/etcd
imageRepository: registry.cn-hangzhou.aliyuncs.com/google_containers
kind: ClusterConfiguration
kubernetesVersion: v1.20.5
networking:
dnsDomain: cluster.local
serviceSubnet: 10.96.0.0/12
scheduler: {}开始执行初始化
kubeadm init --config=kubeadm.yaml初始化过程报错解决，如果出现该错误请看报错解决，未出现错误请跳过报错解决部分
报错解决
[root@master ~]# kubeadm init --config=kubeadm.yaml
W0731 16:00:37.401544 10693 configset.go:348] WARNING: kubeadm cannot validate component configs for API groups [kubelet.config.k8s.io kubeproxy.config.k8s.io]
[init] Using Kubernetes version: v1.19.0
[preflight] Running pre-flight checks
error execution phase preflight: [preflight] Some fatal errors occurred:
[ERROR NumCPU]: the number of available CPUs 1 is less than the required 2
[ERROR FileContent--proc-sys-net-bridge-bridge-nf-call-iptables]: /proc/sys/net/bridge/bridge-nf-call-iptables does not exist
[preflight] If you know what you are doing, you can make a check non-fatal with `--ignore-preflight-errors=...`
To see the stack trace of this error execute with --v=5 or higher错误有两个，一个是虚拟机设置的处理器核数量不够
解决方案：关机，编辑虚拟机设置，增加处理器数量，本文设为2后恢复正常
另一个错误和内核有关
解决方案
modprobe br_netfilter
echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables
echo 1 > /proc/sys/net/ipv4/ip_forward然后执行重置后，在初始化
kubeadm reset在出现错误和下次初始化之前一定要执行重置命令reset
初始化
kubeadm init --config=kubeadm.yaml[root@master ~]# kubeadm init --config=kubeadm.yaml
[init] Using Kubernetes version: v1.20.5
[preflight] Running pre-flight checks
[preflight] Pulling images required for setting up a Kubernetes cluster
[preflight] This might take a minute or two, depending on the speed of your internet connection
[preflight] You can also perform this action in beforehand using 'kubeadm config images pull'
[certs] Using certificateDir folder "/etc/kubernetes/pki"
[certs] Generating "ca" certificate and key
[certs] Generating "apiserver" certificate and key
[certs] apiserver serving cert is signed for DNS names [kubernetes kubernetes.default kubernetes.default.svc kubernetes.default.svc.cluster.local master] and IPs [10.96.0.1 192.168.110.129]
[certs] Generating "apiserver-kubelet-client" certificate and key
[certs] Generating "front-proxy-ca" certificate and key
[certs] Generating "front-proxy-client" certificate and key
[certs] Generating "etcd/ca" certificate and key
[certs] Generating "etcd/server" certificate and key
[certs] etcd/server serving cert is signed for DNS names [localhost master] and IPs [192.168.110.129 127.0.0.1 ::1]
[certs] Generating "etcd/peer" certificate and key
[certs] etcd/peer serving cert is signed for DNS names [localhost master] and IPs [192.168.110.129 127.0.0.1 ::1]
[certs] Generating "etcd/healthcheck-client" certificate and key
[certs] Generating "apiserver-etcd-client" certificate and key
[certs] Generating "sa" key and public key
[kubeconfig] Using kubeconfig folder "/etc/kubernetes"
[kubeconfig] Writing "admin.conf" kubeconfig file
[kubeconfig] Writing "kubelet.conf" kubeconfig file
[kubeconfig] Writing "controller-manager.conf" kubeconfig file
[kubeconfig] Writing "scheduler.conf" kubeconfig file
[kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"
[kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
[kubelet-start] Starting the kubelet
[control-plane] Using manifest folder "/etc/kubernetes/manifests"
[control-plane] Creating static Pod manifest for "kube-apiserver"
[control-plane] Creating static Pod manifest for "kube-controller-manager"
[control-plane] Creating static Pod manifest for "kube-scheduler"
[etcd] Creating static Pod manifest for local etcd in "/etc/kubernetes/manifests"
[wait-control-plane] Waiting for the kubelet to boot up the control plane as static Pods from directory "/etc/kubernetes/manifests". This can take up to 4m0s
[kubelet-check] Initial timeout of 40s passed.
[apiclient] All control plane components are healthy after 59.003423 seconds
[upload-config] Storing the configuration used in ConfigMap "kubeadm-config" in the "kube-system" Namespace
[kubelet] Creating a ConfigMap "kubelet-config-1.20" in namespace kube-system with the configuration for the kubelets in the cluster
[upload-certs] Skipping phase. Please see --upload-certs
[mark-control-plane] Marking the node master as control-plane by adding the labels "node-role.kubernetes.io/master=''" and "node-role.kubernetes.io/control-plane='' (deprecated)"
[mark-control-plane] Marking the node master as control-plane by adding the taints [node-role.kubernetes.io/master:NoSchedule]
[bootstrap-token] Using token: abcdef.0123456789abcdef
[bootstrap-token] Configuring bootstrap tokens, cluster-info ConfigMap, RBAC Roles
[bootstrap-token] configured RBAC rules to allow Node Bootstrap tokens to get nodes
[bootstrap-token] configured RBAC rules to allow Node Bootstrap tokens to post CSRs in order for nodes to get long term certificate credentials
[bootstrap-token] configured RBAC rules to allow the csrapprover controller automatically approve CSRs from a Node Bootstrap Token
[bootstrap-token] configured RBAC rules to allow certificate rotation for all node client certificates in the cluster
[bootstrap-token] Creating the "cluster-info" ConfigMap in the "kube-public" namespace
[kubelet-finalize] Updating "/etc/kubernetes/kubelet.conf" to point to a rotatable kubelet client certificate and key
[addons] Applied essential addon: CoreDNS
[addons] Applied essential addon: kube-proxy
Your Kubernetes control-plane has initialized successfully!
To start using your cluster, you need to run the following as a regular user:
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
Alternatively, if you are the root user, you can run:
export KUBECONFIG=/etc/kubernetes/admin.conf
You should now deploy a pod network to the cluster.
Run "kubectl apply -f [podnetwork].yaml" with one of the options listed at:
https://kubernetes.io/docs/concepts/cluster-administration/addons/
Then you can join any number of worker nodes by running the following on each as root:
kubeadm join 192.168.110.129:6443 --token abcdef.0123456789abcdef \
--discovery-token-ca-cert-hash sha256:33f654f96da6c06f85cf94f5105c3d393ebbc0c65cb528fb60e200d1d6745bff初始化成功！
根据提示，运行如下命令
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config根据提示将node1节点加入集群（该命令根据初始化运行结果提示修改自己的运行命令）
kubeadm join 192.168.110.129:6443 --token abcdef.0123456789abcdef \
--discovery-token-ca-cert-hash sha256:33f654f96da6c06f85cf94f5105c3d393ebbc0c65cb528fb60e200d1d6745bff[root@node1 ~]# kubeadm join 192.168.110.129:6443 --token abcdef.0123456789abcdef --discovery-token-ca-cert-hash sha256:33f654f96da6c06f85cf94f5105c3d393ebbc0c65cb528fb60e200d1d6745bff
[preflight] Running pre-flight checks
[preflight] Reading configuration from the cluster...
[preflight] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -o yaml'
[kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
[kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"
[kubelet-start] Starting the kubelet
[kubelet-start] Waiting for the kubelet to perform the TLS Bootstrap...
This node has joined the cluster:
* Certificate signing request was sent to apiserver and a response was received.
* The Kubelet was informed of the new secure connection details.
Run 'kubectl get nodes' on the control-plane to see this node join the cluster.查询集群状态
kubectl get nodes[root@master ~]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
master Ready control-plane,master 39m v1.20.5
node1 NotReady <none> 18s v1.20.5现在是NoReady的状态，由于没有设置集群网络，安装配置完网络会变为Ready状态。
文章还剩下网路未设置、Docker安装和错误总结部分，近几天会完善相关内容并总结命令和基本使用部分。
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