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一键安装docker脚本 #!/bin/bash # 脚本参数提示 function help_info(){ echo -e "\033[32m\t\t\t请在脚本后面输入参数\t\t\t\t\033[0m" echo -e "\033[32m+-----------------------+---------------------------------------+\033[0m" echo -e "\033[32m|\t参数\t\t|\t\t详解\t\t\t|\033[0m" echo -e "\033[32m+-----------------------+---------------------------------------+\033[0m" echo -e "\033[32m|\toffline\t\t|\t离线安装\t\t\t|\033[0m" echo -e "\033[32m|\tonline\t\t|\t在线安装(需要机器访问外网)\t|\033[0m" echo -e "\033[32m|\tremove\t\t|\t清理环境\t\t\t|\033[0m" echo -e "\033[32m|\thelp\t\t|\t帮助信息\t\t\t|\033[0m" echo -e "\033[32m|\tuninstall\t|\t卸载docker\t\t\t|\033[0m" echo -e "\033[32m+-----------------------+---------------------------------------+\033[0m" } # 安装其他docker版本 function download_other_version(){ cd /root/docker_install_pkg/ # 若第2个参数不做自定义版本要求，则默认使用24.0.2版本安装包 docker_version=${2:-24.0.2} while true; do wget https://download.docker.com/linux/static/stable/x86_64/docker-$docker_version.tgz &> /dev/null if [ $? -eq 0 ]; then echo -e "\033[32m下载Docker离线安装包为:docker-$docker_version.tgz,包存放路径为:/root/docker_install_pkg/\033[0m" break fi done # wget https://download.docker.com/linux/static/stable/x86_64/docker-$docker_version.tgz >> /dev/null # echo -e "\033[32m下载Docker离线安装包为:docker-$docker_version.tgz,包存放路径为:/root/docker_install_pkg/\033[0m" } # function find_pkg(){ cp -a $(find / -name 'docker-24.0.2.tgz' | grep -i docker) /root/docker_install_pkg/ } # 离线安装配置 function install_service(){ cd /root/docker_install_pkg/ tar -zxf docker*.tgz cp -p docker/* /usr/bin/ cat > /usr/lib/systemd/system/docker.service << EOF [Unit] Description=Docker Application Container Engine Documentation=http://docs.docker.com After=network.target docker.socket [Service] Type=notify EnvironmentFile=-/run/flannel/docker WorkingDirectory=/usr/local/bin ExecStart=/usr/bin/dockerd \ -H tcp://0.0.0.0:4243 \ -H unix:///var/run/docker.sock \ --selinux-enabled=false \ --log-opt max-size=1g ExecReload=/bin/kill -s HUP $MAINPID # Having non-zero Limit*s causes performance problems due to accounting overhead # in the kernel. We recommend using cgroups to do container-local accounting. LimitNOFILE=infinity LimitNPROC=infinity LimitCORE=infinity # Uncomment TasksMax if your systemd version supports it. # Only systemd 226 and above support this version. #TasksMax=infinity TimeoutStartSec=0 # set delegate yes so that systemd does not reset the cgroups of docker containers Delegate=yes # kill only the docker process, not all processes in the cgroup KillMode=process Restart=on-failure [Install] WantedBy=multi-user.target EOF mkdir -p /etc/docker cat > /etc/docker/daemon.json << EOF { "registry-mirrors": [ "https://2a6bf1988cb6428c877f723ec7530dbc.mirror.swr.myhuaweicloud.com", "https://docker.m.daocloud.io", "https://hub-mirror.c.163.com", "https://mirror.baidubce.com", "https://your_preferred_mirror", "https://dockerhub.icu", "https://docker.registry.cyou", "https://docker-cf.registry.cyou", "https://dockercf.jsdelivr.fyi", "https://docker.jsdelivr.fyi", "https://dockertest.jsdelivr.fyi", "https://mirror.aliyuncs.com", "https://dockerproxy.com", "https://mirror.baidubce.com", "https://docker.m.daocloud.io", "https://docker.nju.edu.cn", "https://docker.mirrors.sjtug.sjtu.edu.cn", "https://docker.mirrors.ustc.edu.cn", "https://mirror.iscas.ac.cn", "https://docker.rainbond.cc" ] } EOF systemctl daemon-reload systemctl start docker systemctl enable docker >> /dev/null echo -e "\033[32mDocker服务启动完成，并设置为开机自启!\033[0m" } function service_alive(){ systemctl is-active docker >> /dev/null if [ $? -eq 0 ];then echo -e "\033[31mDocker已经存在，无需安装!\033[0m" fi } #卸载docker function uninstall_docker(){ docker stop $(docker ps -aq) &> /dev/null docker rm $(docker ps -aq) &> /dev/null docker rmi $(docker images -q) &> /dev/null systemctl stop docker rm -rf /etc/systemd/system/docker.service /usr/bin/containerd /usr/bin/containerd-shim /usr/bin/ctr /usr/bin/runc /usr/bin/docker* /etc/docker/ /var/lib/docker echo -e "\033[32mDocker卸载完成!\033[0m" } # 安装执行 if [ `whoami` = 'root' ];then # 安装目录 mkdir -pv /root/docker_install_pkg/ >> /dev/null case $1 in offline ) service_alive # 离线安装 find_pkg && install_service ;; online ) service_alive # 在线安装 download_other_version && install_service ;; remove ) # 清理环境 if [ -d /root/docker_install_pkg/ ];then rm -r /root/docker_install_pkg/ echo -e "\033[32m环境清理完成!\033[0m" else echo -e "\033[31m环境清理完成，无需重复执行!\033[0m" fi ;; uninstall ) # 卸载docker uninstall_docker ;; * | help ) # 帮助 help_info ;; esac else echo -e "\033[31m当前执行用户为非root用户，推荐使用root用户执行安装操作!\033[0m" fi -
Shell中整数自增的几种方式 在Shell脚本中，用于while或for循环中经常要涉及到整数自增的情况，下面罗列下可能的方式【方式一】declare -i来声明整数变量root@localhost:~# declare -i x=1 root@localhost:~# x+=1 root@localhost:~# echo $x 2 【 方式二 】使用let命令root@localhost:~# i=1 root@localhost:~# let i+=1 root@localhost:~# echo $i 2 root@localhost:~# i=1 root@localhost:~# let i=$i+1 root@localhost:~# echo $i 2 root@localhost:~# i=1 root@localhost:~# let i++ root@localhost:~# echo $i 2 root@localhost:~# i=1 root@localhost:~# let ++i root@localhost:~# echo $i 2 【 方式三 】使用(())root@localhost:~# i=1 root@localhost:~# ((++i)) root@localhost:~# echo $i 2 root@localhost:~# i=1 root@localhost:~# ((i++)) root@localhost:~# echo $i 2 【 方式四 】使用expr命令root@localhost:~# i=1 root@localhost:~# i=`expr $i + 1` root@localhost:~# echo $i 2 root@localhost:~# i=1 root@localhost:~# i=$(expr $i + 1) root@localhost:~# echo $i 2 【 方式五 】使用$(())root@localhost:~# i=1 root@localhost:~# i=$(($i + 1)) root@localhost:~# echo $i 2 【 方式六 】使用$[]root@localhost:~# i=1 root@localhost:~# i=$[$i + 1] root@localhost:~# echo $i 2 备注1)使用i=$(expr $i + 1)比i=`expr $i + 1`要好些 2)使用(())或者$(())速度要比expr快 3)如果不考虑速度问题，涉及到不同平台的兼容，最好使用expr 4)Bash(sh)上使用比较多的情形:let,expr,(())
