#!/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()
到此这篇关于利用python脚本自动部署k8s的文章就介绍到这了,更多相关python自动部署k8s内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家！
咨 询 客 服