这篇文章主要为大家展示了“怎么利用python脚本自动部署k8s”，内容简而易懂，条理清晰，希望能够帮助大家解决疑惑，下面让小编带领大家一起研究并学习一下“怎么利用python脚本自动部署k8s”这篇文章吧。
通过之前在Ubuntu18.04上手动部署过k8s之后，尝试用python脚本进行自动化部署
这次用的是三台centos7的虚拟机，一台作为master执行脚本，两台作为node节点
三台机器都配置好静态IP，可以参考之前的在centos 7中安装配置k8s集群的步骤详解
放在/root下，用于从dockerhub拉取镜像。
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 << EOF [kubernetes] name=Kubernetes baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64 enabled=1 gpgcheck=1 repo_gpgcheck=1 gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg EOF """ yum_clean = "yum -y makecache > /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 <<EOF net.bridge.bridge-nf-call-ip6tables = 1 net.bridge.bridge-nf-call-iptables = 1 net.ipv4.ip_forward = 1 vm.swappiness=0 EOF """ limits_conf = """ cat > /etc/security/limits.conf << EOF * soft nofile 65536 * hard nofile 65536 * soft nproc 65536 * hard nproc 65536 * soft memlock unlimited * hard memlock unlimited DefaultLimitNOFILE=102400 DefaultLimitNPROC=102400 EOF """ sysctl_k8s = "sysctl -p /etc/sysctl.d/k8s.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 <<EOF \n%sEOF\n" % hosts_name) print("*"*20,"进入环境初始化，请耐心等待....") for shell in self.initialization_shell(): time.sleep(1) env_init = os.system(shell) print("*"*20,"环境初始化完成，安装kubernetes...") #设置hosts #集群初始化 registry = os.system("%s" %dir3) restart_docker = os.system("systemctl restart docker") dockerpull = os.system("sh /root/k8s.sh") docker_problem = os.system("%s" %dir0) restart_docker = os.system("systemctl restart docker") status_docker = os.system("systemctl status docker") kubeadm_init = os.system("kubeadm init") export_root = os.system("export KUBECONFIG=/etc/kubernetes/admin.conf") config = os.system("%s" %dir1) source = os.system("source /etc/profile") mkdir_kube = os.system("mkdir -p /root/.kube") kube_config = os.system("cp -i /etc/kubernetes/admin.conf /root/.kube/config") kubelet_enable = os.system("systemctl enable kubelet") kubelet_start = os.system("systemctl start kubelet") manage_yaml = os.system("sed -i 's/.*- --port=0*/#&/' /etc/kubernetes/manifests/kube-controller-manager.yaml") scheduler_yaml = os.system("sed -i 's/.*- --port=0*/#&/' /etc/kubernetes/manifests/kube-scheduler.yaml") #配置flannel网络 print("*" * 20, "正在安装网络组件flannel....") flannel_before = os.system("%s" %dir2) flannel_wget = os.system("wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml") yum_flannel = os.system("yum install -y flannel") flannel_apply = os.system("kubectl apply -f /root/kube-flannel.yml") print("*" * 20, "网络组件flannel安装完成....") token_creat = subprocess.getstatusoutput("kubeadm token create") token_code = subprocess.getstatusoutput("openssl x509 -pubkey -in /etc/kubernetes/pki/ca.crt | openssl rsa -pubin -outform der 2>/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 <none> 3m30s v1.21.2
node02 Ready <none> 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":"true"}
[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以上是“怎么利用python脚本自动部署k8s”这篇文章的所有内容，感谢各位的阅读！相信大家都有了一定的了解，希望分享的内容对大家有所帮助，如果还想学习更多知识，欢迎关注亿速云行业资讯频道！
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