kubernetes安装

迈不过友情╰ 2022-05-19 10:41 213阅读 0赞

安装kubernetes的时候，需要安装kubelet, kubeadm,kubeadm等包，但k8s官网给的yum源是packages.cloud.google.com，国内访问不了，此时我们可以使用阿里云的yum仓库镜像。

#### kubeadm 安装步骤 ####

1、首先禁用防护墙

systemctl disable firewalld
    systemctl stop firewalld

2、禁用SELINUX：

setenforce 0 // 查看 cat /etc/selinux/config SELINUX=disabled

3、`swapoff -a`  
4、创建`/etc/sysctl.d/k8s.conf`文件，添加如下内容：

net.bridge.bridge-nf-call-ip6tables = 1
    net.bridge.bridge-nf-call-iptables = 1
    net.ipv4.ip_forward = 1

5、设置k8s yum源

vi /etc/yum.repos.d/kubernetes.repo

[kubernetes]
    name=Kubernetes
    baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64
    enabled=1
    gpgcheck=1
    repo_gpgcheck=1
    gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg

[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

6、安装kubeadm和相关工具

yum install -y docker kubelet kubeadm kubectl kubernetes-cni

7、首先执行脚本下载好所需的镜像，并修改tag

#!/bin/bash
    images=(kube-proxy-amd64:v1.11.0 kube-scheduler-amd64:v1.11.0 kube-controller-manager-amd64:v1.11.0 kube-apiserver-amd64:v1.11.0
    etcd-amd64:3.2.18 coredns:1.1.3 pause-amd64:3.1 kubernetes-dashboard-amd64:v1.8.3 )
    for imageName in ${images[@]} ; do
      docker pull registry.cn-hangzhou.aliyuncs.com/k8sth/$imageName
      docker tag registry.cn-hangzhou.aliyuncs.com/k8sth/$imageName k8s.gcr.io/$imageName
      docker rmi registry.cn-hangzhou.aliyuncs.com/k8sth/$imageName
    done
    
    
    
    images2=(k8s-dns-sidecar-amd64:1.14.9 k8s-dns-kube-dns-amd64:1.14.9
    k8s-dns-dnsmasq-nanny-amd64:1.14.9 )
    for imageName in ${images2[@]} ; do
      docker pull registry.cn-beijing.aliyuncs.com/k8s_images/$imageName
      docker tag registry.cn-beijing.aliyuncs.com/k8s_images/$imageName k8s.gcr.io/$imageName
      docker rmi registry.cn-beijing.aliyuncs.com/k8s_images/$imageName
    done
    docker tag da86e6ba6ca1 k8s.gcr.io/pause:3.1

8、执行如下命令初始化安装

kubeadm init --kubernetes-version=1.11.0 --token-ttl 0 --pod-network-cidr=10.244.0.0/16

9、如果安装失败，重置

kukbeadm reset

10、查看相关日志

tail -n 1000 /var/log/messages

11、删除相关镜像

docker rm $(docker ps -a -q) //删除所有已经停止的容器
    docker rmi --force $(docker images | grep doss-api | awk '{print $3}') //强制删除镜像名称中包含“doss-api”的镜像
    docker rmi $(docker images -q)//删除所有镜像

#### 异常总结： ####

1) 如果进程被占用了，2379是etcd端口，可以通过lsof -i:2379被那些端口占用，然后杀掉进程；也可以直接执行`systemctl stop etcd.service`  
2) running with swap on is not supported. Please disable swap 不重启电脑，执行命令，立即生效`swapoff -a`  
3) 如果出现检查异常如下，可以先执行之前安装的低版本，然后再执行上面的命令![这里写图片描述][70]

[70]: /images/20220519/baf3d5bcc627476aa86fc06d75b4aab9.png