#!/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): #環境初始化shell
# 關閉防火墻
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"
#在所有服務器配置國內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"
#修改內核參數，由于ipvs已經加入到了內核的主干，所以為kube-proxy開啟ipvs的前提需要加載以下的內核模塊
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'''
# #自動添加策略，保存服務器的主機名和密鑰信息，如果不添加，那么不再本地know_hosts文件中記錄的主機將無法連接
for masterip in masterip_list:
name_num += 1
hosts_name = ""
if masterip == masterip_list[0]: # 如果是當前單節點
print("*"*20,"進入Master節點操作，當前IP: %s" %masterip)
master_name = "master0%s" % name_num
#設置名字
hostname = os.system("hostname %s"%master_name)
etc_hostname = os.system("echo '%s' > /etc/hostname" % master_name)
#設置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,"進入環境初始化，請耐心等待....")
for shell in self.initialization_shell():
time.sleep(1)
env_init = os.system(shell)
print("*"*20,"環境初始化完成，安裝kubernetes...")
#設置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網絡
print("*" * 20, "正在安裝網絡組件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, "網絡組件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]
# 安裝從節點
for nodeip in nodeip_list:
os.system("scp -rp /etc/hosts %s:/etc/hosts" % nodeip)
print("*" * 20, "進入Node節點操作，當前IP: %s" % nodeip)
node_num += 1
node_name = "node0%s" % (node_num)
# 設置名字
os.system("ssh %s \"hostname %s\"" % (nodeip,node_name))
os.system("ssh %s \"echo '%s' > /etc/hostname\"" % (nodeip,node_name))
print("*" * 20, "進入環境初始化，請耐心等待....")
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("進入集群模式安裝")
print("暫無")
exit()
if __name__ == '__main__':
# #用戶輸入IP:
print("----------0、請先安裝python3 并使用python3 執行此腳本------------")
print("----------1、此腳本依賴網絡，請連接好網絡執行此腳本-----------")
print("----------2、請將此腳本在主節點上執行，請在主節點上對其他所有節點做免密登錄-----------")
print("**********3、請確認主節點已對其他節點做好免密登錄，再次確認后再執行此腳本**********")
k8s_masterip = input("請輸入K8S_Master IP, 多個IP以逗號分隔: ")
k8s_nodeip = input("請輸入K8S_node IP,多個IP以逗號分隔: ")
ask_ent = input("********** 確認/取消 (Y/N) :")
if ask_ent.upper() == "Y":
k8s_install = k8s_install(k8s_masterip,k8s_nodeip)
k8s_install.shell_command()
else:
exit()
到此這篇關于利用python腳本自動部署k8s的文章就介紹到這了,更多相關python自動部署k8s內容請搜索腳本之家以前的文章或繼續瀏覽下面的相關文章希望大家以后多多支持腳本之家！
