#!/bin/python3
# -*- coding:utf-8 -*-
# author: fanb
# describe: K8S v1.21.2 一鍵腳本安裝
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): #環(huán)境初始化shell
# 關(guān)閉防火墻
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"
#在所有服務(wù)器配置國(guó)內(nèi)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"
#修改內(nèi)核參數(shù)，由于ipvs已經(jīng)加入到了內(nèi)核的主干，所以為kube-proxy開(kāi)啟ipvs的前提需要加載以下的內(nèi)核模塊
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"
#時(shí)間同步
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"
#安裝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'''
# #自動(dòng)添加策略，保存服務(wù)器的主機(jī)名和密鑰信息，如果不添加，那么不再本地know_hosts文件中記錄的主機(jī)將無(wú)法連接
for masterip in masterip_list:
name_num += 1
hosts_name = ""
if masterip == masterip_list[0]: # 如果是當(dāng)前單節(jié)點(diǎn)
print("*"*20,"進(jìn)入Master節(jié)點(diǎn)操作，當(dāng)前IP: %s" %masterip)
master_name = "master0%s" % name_num
#設(shè)置名字
hostname = os.system("hostname %s"%master_name)
etc_hostname = os.system("echo '%s' > /etc/hostname" % master_name)
#設(shè)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,"進(jìn)入環(huán)境初始化，請(qǐng)耐心等待....")
for shell in self.initialization_shell():
time.sleep(1)
env_init = os.system(shell)
print("*"*20,"環(huán)境初始化完成，安裝kubernetes...")
#設(shè)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網(wǎng)絡(luò)
print("*" * 20, "正在安裝網(wǎng)絡(luò)組件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, "網(wǎng)絡(luò)組件flannel安裝完成....")
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]
# 安裝從節(jié)點(diǎn)
for nodeip in nodeip_list:
os.system("scp -rp /etc/hosts %s:/etc/hosts" % nodeip)
print("*" * 20, "進(jìn)入Node節(jié)點(diǎn)操作，當(dāng)前IP: %s" % nodeip)
node_num += 1
node_name = "node0%s" % (node_num)
# 設(shè)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, "進(jìn)入環(huán)境初始化，請(qǐng)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 ,"執(zhí)行以下命令,檢查K8s集群\n")
print("*" * 20,"kubectl get nodes")
print("*" * 20, "kubectl get cs")
print("*" * 20, "kubectl get pod -n kube-system")
else: #否則就是集群模式
print("進(jìn)入集群模式安裝")
print("暫無(wú)")
exit()
if __name__ == '__main__':
# #用戶輸入IP:
print("----------0、請(qǐng)先安裝python3 并使用python3 執(zhí)行此腳本------------")
print("----------1、此腳本依賴(lài)網(wǎng)絡(luò)，請(qǐng)連接好網(wǎng)絡(luò)執(zhí)行此腳本-----------")
print("----------2、請(qǐng)將此腳本在主節(jié)點(diǎn)上執(zhí)行，請(qǐng)?jiān)谥鞴?jié)點(diǎn)上對(duì)其他所有節(jié)點(diǎn)做免密登錄-----------")
print("**********3、請(qǐng)確認(rèn)主節(jié)點(diǎn)已對(duì)其他節(jié)點(diǎn)做好免密登錄，再次確認(rèn)后再執(zhí)行此腳本**********")
k8s_masterip = input("請(qǐng)輸入K8S_Master IP, 多個(gè)IP以逗號(hào)分隔: ")
k8s_nodeip = input("請(qǐng)輸入K8S_node IP,多個(gè)IP以逗號(hào)分隔: ")
ask_ent = input("********** 確認(rèn)/取消 (Y/N) :")
if ask_ent.upper() == "Y":
k8s_install = k8s_install(k8s_masterip,k8s_nodeip)
k8s_install.shell_command()
else:
exit()
到此這篇關(guān)于利用python腳本自動(dòng)部署k8s的文章就介紹到這了,更多相關(guān)python自動(dòng)部署k8s內(nèi)容請(qǐng)搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持腳本之家！
