如何利用python脚本自动部署k8s

 set -o errexit set -o nounset set -o pipefail ##这里定义版本，按照上面得到的列表自己改一下版本号 KUBE_VERSION=v1.21.3 KUBE_PAUSE_VERSION=3.4.1 ETCD_VERSION=3.4.13-0 ##这是原始仓库名，最后需要改名成这个 GCR_URL=k8s.gcr.io ##这里就是写你要使用的仓库 DOCKERHUB_URL=gotok8s ##这里是镜像列表，新版本要把coredns改成coredns/coredns images=( kube-proxy:${KUBE_VERSION} kube-scheduler:${KUBE_VERSION} kube-controller-manager:${KUBE_VERSION} kube-apiserver:${KUBE_VERSION} pause:${KUBE_PAUSE_VERSION} etcd:${ETCD_VERSION} ) ##这里是拉取和改名的循环语句 for imageName in ${images[@]} ; do docker pull $DOCKERHUB_URL/$imageName docker tag $DOCKERHUB_URL/$imageName $GCR_URL/$imageName docker rmi $DOCKERHUB_URL/$imageName done docker pull coredns/coredns:1.8.0 docker tag coredns/coredns:1.8.0 k8s.gcr.io/coredns/coredns:v1.8.0 docker rmi coredns/coredns:1.8.0

 #!/bin/python3 # -*- coding:utf-8 -*- # author: fanb # describe: K8S v1.21.2 一键脚本安装 import os import subprocess import time class k8s_install(object): def __init__(self,masterip,nodeip): self.masterip = masterip self.nodeip = nodeip def initialization_shell(self): #环境初始化shell # 关闭防火墙 setenforce = "setenforce  0" sed_selinux = "sed -i 's/^SELINUX=enforcing/SELINUX=disabled/g' /etc/sysconfig/selinux" sed_selinux1 = "sed -i 's/^SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config" sed_selinux2 = "sed -i 's/^SELINUX=permissive/SELINUX=disabled/g' /etc/sysconfig/selinux" sed_selinux3 = "sed -i 's/^SELINUX=permissive/SELINUX=disabled/g' /etc/selinux/config" stop_firewalld = "systemctl stop firewalld" disable_firewalld = "systemctl disable firewalld" swapoff_a = "swapoff -a" sed_swapoff = "sed -i 's/.*swap.*/#&/' /etc/fstab" #在所有服务器配置国内yum源 yum_install = "yum install -y wget  git chrony yum-utils device-mapper-persistent-data lvm2 ipset ipvsadm > /dev/null 2>&1" mkdir_repo = "mkdir /etc/yum.repos.d/bak && mv /etc/yum.repos.d/*.repo /etc/yum.repos.d/bak > /dev/null 2>&1" wget_centos = "wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.cloud.tencent.com/repo/centos7_base.repo > /dev/null 2>&1" wget_epel = "wget -O /etc/yum.repos.d/epel.repo http://mirrors.cloud.tencent.com/repo/epel-7.repo > /dev/null 2>&1" wget_docker = "wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/docker-ce.repo > /dev/null 2>&1" kubernetes_repo = """ cat >  /etc/yum.repos.d/kubernetes.repo < /dev/null 2>&1" yum_makecahe = "yum -y makecache > /dev/null 2>&1" #修改内核参数，由于ipvs已经加入到了内核的主干，所以为kube-proxy开启ipvs的前提需要加载以下的内核模块 modprobe_netfilter = "modprobe br_netfilter" br_netfilter = "echo 'br_netfilter' > /etc/modules-load.d/br_netfilter.conf" k8s_conf = """ cat > /etc/sysctl.d/k8s.conf < /etc/security/limits.conf < /dev/null 2>&1" #时间同步 enable_chronyd = "systemctl enable chronyd.service" start_chronyd = "systemctl start chronyd.service" set_timezone = "timedatectl set-timezone Asia/Shanghai" ntpdate = "ntpdate ntp1.aliyun.com > /dev/null 2>&1" chronyc_sources = "chronyc sources > /dev/null 2>&1" #安装docker,kubelet remove_docker = "yum remove -y docker docker-ce docker-common docker-selinux docker-engine > /dev/null 2>&1" install_docker = "yum install -y docker-ce > /dev/null 2>&1" start_docker = "systemctl start docker > /dev/null 2>&1" docker_reload = "systemctl daemon-reload > /dev/null 2>&1" enable_docker = "systemctl enable docker  > /dev/null 2>&1" restart_docker = "systemctl restart docker > /dev/null 2>&1" install_kubelet = "yum install -y kubelet-1.21.2 kubeadm-1.21.2 kubectl-1.21.2 --disableexcludes=kubernetes > /dev/null 2>&1" enable_kubelet = "systemctl enable kubelet > /dev/null 2>&1" start_kubelet = "systemctl start kubelet > /dev/null 2>&1" return setenforce,sed_selinux,sed_selinux1,sed_selinux2,sed_selinux3,stop_firewalld,disable_firewalld,swapoff_a,sed_swapoff,yum_install,\ mkdir_repo,wget_centos,wget_epel,wget_docker,kubernetes_repo,yum_clean,yum_makecahe,modprobe_netfilter,br_netfilter,k8s_conf,limits_conf,\ sysctl_k8s,enable_chronyd,start_chronyd,set_timezone,ntpdate,chronyc_sources,remove_docker,install_docker,start_docker,docker_reload,enable_docker,restart_docker,\ install_kubelet,enable_kubelet,start_kubelet def shell_command(self): masterip_list = self.masterip.split(',') nodeip_list = self.nodeip.split(',') token_creat = () token_code = () name_num = 0 node_num = 0 dir0 = '''echo '{ "exec-opts":["native.cgroupdriver=systemd"] }' > /etc/docker/daemon.json''' dir1 = '''echo 'export KUBECONFIG=/etc/kubernetes/admin.conf' >> /etc/profile''' dir2 = '''echo '199.232.68.133 raw.githubusercontent.com' >> /etc/hosts''' dir3 = '''echo '{ "registry-mirrors": ["https://docker.mirrors.ustc.edu.cn"] }' > /etc/docker/daemon.json''' # #自动添加策略，保存服务器的主机名和密钥信息，如果不添加，那么不再本地know_hosts文件中记录的主机将无法连接 for masterip in masterip_list: name_num += 1 hosts_name = "" if masterip == masterip_list[0]:  # 如果是当前单节点 print("*"*20,"进入Master节点操作，当前IP: %s" %masterip) master_name = "master0%s" % name_num #设置名字 hostname = os.system("hostname %s"%master_name) etc_hostname =  os.system("echo '%s' > /etc/hostname" % master_name) #设置hosts master_host = masterip + "  " + master_name etc_hosts = os.system("echo '%s' >> /etc/hosts" % master_host) for hosts in nodeip_list: name_num += 1 hosts_name += hosts + "  node0%s" % (name_num - 1) + "\n" os.system("cat >> /etc/hosts </dev/null | openssl dgst -sha256 -hex | sed 's/^.* //'") token_creat = token_creat[1].split('\n')[-1] token_code = token_code[1] # 安装从节点 for nodeip in nodeip_list: os.system("scp -rp /etc/hosts %s:/etc/hosts" % nodeip) print("*" * 20, "进入Node节点操作，当前IP: %s" % nodeip) node_num += 1 node_name = "node0%s" % (node_num) # 设置名字 os.system("ssh %s \"hostname %s\"" % (nodeip,node_name)) os.system("ssh %s \"echo '%s' > /etc/hostname\"" % (nodeip,node_name)) print("*" * 20, "进入环境初始化，请耐心等待....") for shell in self.initialization_shell(): time.sleep(1) os.system("ssh %s \"%s\"" %(nodeip,shell)) enable_node = os.system("ssh %s \"systemctl enable kubelet\"" %nodeip) start_node = os.system("ssh %s \"systemctl start kubelet\"" %nodeip) admin = os.system("scp /etc/kubernetes/admin.conf %s:/root" %nodeip) print("*" * 20, "正在加入集群....") print("token_creat : ",token_creat) print("token_code : ",token_code) docker_problem = os.system("scp -r /etc/docker/daemon.json %s:/etc/docker" %nodeip) restart_docker = os.system("ssh %s \"systemctl restart docker\"" %nodeip) status_docker = os.system("ssh %s \"systemctl status docker\"" %nodeip) kubeadm_join = os.system("ssh %s \"kubeadm join %s:6443 --token %s --discovery-token-ca-cert-hash sha256:%s\"" % (nodeip,masterip, str(token_creat), str(token_code))) cni = os.system("scp -r /etc/cni %s:/etc" %nodeip) print("*" * 20, "加入集群成功....") print("*" * 20 ,"执行以下命令,检查K8s集群\n") print("*" * 20,"kubectl get nodes") print("*" * 20, "kubectl get cs") print("*" * 20, "kubectl get pod -n kube-system") else:   #否则就是集群模式 print("进入集群模式安装") print("暂无") exit() if __name__ == '__main__': # #用户输入IP: print("----------0、请先安装python3 并使用python3 执行此脚本------------") print("----------1、此脚本依赖网络，请连接好网络执行此脚本-----------") print("----------2、请将此脚本在主节点上执行，请在主节点上对其他所有节点做免密登录-----------") print("**********3、请确认主节点已对其他节点做好免密登录，再次确认后再执行此脚本**********") k8s_masterip = input("请输入K8S_Master IP, 多个IP以逗号分隔: ") k8s_nodeip = input("请输入K8S_node IP,多个IP以逗号分隔: ") ask_ent = input("**********   确认/取消 (Y/N) :") if ask_ent.upper() == "Y": k8s_install = k8s_install(k8s_masterip,k8s_nodeip) k8s_install.shell_command() else: exit()

 [root@master ~]# ssh-keygen [root@master ~]# ssh-copy-id 192.168.139.132 [root@master ~]# ssh-copy-id 192.168.139.133

 root@master ~]# vim k8s_install.py

 [root@master ~]# python3 k8s_install.py

 ******************** 执行以下命令,检查K8s集群 ******************** kubectl get nodes ******************** kubectl get cs ******************** kubectl get pod -n kube-system [root@master ~]# kubectl get nodes NAME       STATUS   ROLES                  AGE     VERSION master01   Ready    control-plane,master   7m2s    v1.21.2 node01     Ready                     3m30s   v1.21.2 node02     Ready                     25s     v1.21.2 [root@master ~]# 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":"tru<span style="color:transparent">来源gaodai#ma#com搞*代#码网</span>e"} [root@master ~]# kubectl get pod -n kube-system NAME                               READY   STATUS              RESTARTS   AGE coredns-558bd4d5db-fkqcb           0/1     ContainerCreating   0          6m52s coredns-558bd4d5db-tvb7j           0/1     ContainerCreating   0          6m52s etcd-master01                      1/1     Running             0          7m16s kube-apiserver-master01            1/1     Running             0          7m16s kube-controller-manager-master01   1/1     Running             0          7m12s kube-flannel-ds-9hx9s              0/1     Init:0/1            0          43s kube-flannel-ds-cl9r7              0/1     Init:0/1            0          3m49s kube-flannel-ds-gn4m4              0/1     CrashLoopBackOff    5          6m52s kube-proxy-cv5t8                   0/1     ContainerCreating   0          43s kube-proxy-kjqm7                   0/1     ContainerCreating   0          3m49s kube-proxy-plbgm                   1/1     Running             0          6m52s kube-scheduler-master01            1/1     Running             0          7m13s