前言：

       备份重要数据，简化重复操作，让一指禅、点点点也能完成运维任务。

       脚本呈现界面如下：

1、查看Etcd版本

root@master:~# cat /etc/kubernetes/manifests/etcd.yaml | grep image: | awk '{print $2}'
registry.aliyuncs.com/google_containers/etcd:3.5.10-0

2、下载安装Etcd操作命令etcdctl

#下载etcdctl
root@master:~# wget https://github.com/etcd-io/etcd/releases/download/v3.5.10/etcd-v3.5.10-linux-amd64.tar.gz
root@master:~# 
#解压缩
root@master:~# tar -zxvf etcd-v3.5.10-linux-amd64.tar.gz
root@master:~# 
#移进可执行程序目录
root@master:~# sudo mv etcd-v3.5.10-linux-amd64/etcdctl /usr/bin/
root@master:~# sudo mv etcd-v3.5.10-linux-amd64/etcdutl /usr/bin/
root@master:~# 
#查看一下etcdctl版本
root@master:~# etcdctl
NAME:etcdctl - A simple command line client for etcd3.USAGE:etcdctl [flags]VERSION:3.5.10API VERSION:3.5
#创建备份目录
root@master:~# mkdir -p /data/backup/file

3、Etcd数据备份/恢复脚本

#!/bin/bash
#AUTHOR       : Created by YaoButing
#PLATFORM     : Ubuntu 20.04.6 LTS (Focal Fossa）
#VERSION      : 1.0
#DATE         : 2024-05-06
#DESCRIPTION  : This script is used to muanual backup/restore etcd data.
###############################################################################
NUMBER=100
while (($NUMBER>0))
doecho "                                                                    "echo "                         请选择需要执行的操作                         "echo "********************************************************************"echo "*                                                                  *"echo "*        [ 1 ]. Etcd数据备份           [ 2 ]. Etcd数据恢复           *"   echo "*                                                                  *"echo "********************************************************************"echo "*                         按 0 推出脚本                             *"read -p "请输入将要执行的动作序号:" NUMBERecho "                                                                    "echo "                                                                    "if (($NUMBER==1))then         echo "###########--  1  --###########  开始备份Etcd数据  ###############"echo " "ETCDCTL_API=3 etcdctl --endpoints=https://127.0.0.1:2379 \--cacert=/etc/kubernetes/pki/etcd/ca.crt \--cert=/etc/kubernetes/pki/etcd/server.crt \--key=/etc/kubernetes/pki/etcd/server.key \snapshot save /data/backup/etcd-snapshot-`date "+%Y-%m-%d"`.dbecho ""echo "###########--  1  --############  Etcd数据备份完毕  ##############"echo " "echo "###########--  1  --############  验证Etcd快照  ##################"echo " "ETCDCTL_API=3 etcdctl --write-out=table snapshot status /data/backup/etcd-snapshot-`date "+%Y-%m-%d"`.dbecho " "	elif (($NUMBER==2))thenecho "###########--  2  --###########  下面是现有的Etcd备份文件  ########"ls /data/backup/ | sort -k 2 | nl ls /data/backup/ | sort -k 2 > /data/backup/file/file.txtread -p "#####-----------请输入要恢复的Etcd备份文件行号:" DBetcdfile=$(sed -n "${DB}p" /data/backup/file/file.txt)echo ""echo "创建恢复目录'/var/lib/etcd-restore'"mkdir /opt/backupmkdir /var/lib/etcd-restoremv /etc/kubernetes/manifests/kube* /opt/backup/ETCDCTL_API=3 etcdctl --endpoints=https://127.0.0.1:2379 \--cacert=/etc/kubernetes/pki/etcd/ca.crt \--cert=/etc/kubernetes/pki/etcd/server.crt \--key=/etc/kubernetes/pki/etcd/server.key \--data-dir=/var/lib/etcd-restore \snapshot restore /data/backup/$etcdfilecp /opt/backup/* /etc/kubernetes/manifests/mv /etc/kubernetes/manifests/etcd.yaml /etc/kubernetes/manifests/bak.etcd.yamlsed 's!/var/lib/etcd!/var/lib/etcd-restore!'  /etc/kubernetes/manifests/bak.etcd.yaml > /etc/kubernetes/manifests/etcd.yamlcat /etc/kubernetes/manifests/etcd.yaml | grep '/var/lib/etcd-restore'systemctl daemon-reloadsystemctl restart kubeletecho ""echo "###########--  2  --###########  Etcd数据恢复结束  ################"echo ""echo "数据恢复已结束，但仍需等待几分钟再进行查看验证..."elif (($NUMBER==0))thenecho "###########---        程序即将退出        ---######################"elseecho "########---     输入错误，请按照指定序号输入     --------############"              fi  
done