linux安装docker
1、安装环境
此处在Centos7进行安装,可以使用以下命令查看CentOS版本
lsb_release -a
在 CentOS 7安装docker要求系统为64位、系统内核版本为 3.10 以上,可以使用以下命令查看
uname -r
2、用yum源安装
2.1 查看是否已安装docker列表
yum list installed | grep docker
2.2 安装docker
yum -y install docker
-y表示不询问安装,直到安装成功,安装完后再次查看安装列表
2.3 启动docker
systemctl start docker
2.4 查看docker服务状态
systemctl status docker
以上说明docker安装成功
3、离线安装模式
3.1 安装包官方地址:https://download.docker.com/linux/static/stable/x86_64/
可以先下载到本地,然后通过ftp工具上传到服务器上,或者在服务器上使用命令下载
wget https://download.docker.com/linux/static/stable/x86_64/docker-18.06.3-ce.tgz
3.2 解压
tar -zxvf docker-18.06.3-ce.tgz
3.3 将解压出来的docker文件复制到 /usr/bin/ 目录下
cp docker/* /usr/bin/
3.4 在/etc/systemd/system/目录下新增docker.service文件,内容如下,这样可以将docker注册为service服务
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service
Wants=network-online.target
[Service]
Type=notify
# the default is not to use systemd for cgroups because the delegate issues still
# exists and systemd currently does not support the cgroup feature set required
# for containers run by docker
ExecStart=/usr/bin/dockerd --selinux-enabled=false --insecure-registry=127.0.0.1
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 the docker process if it exits prematurely
Restart=on-failure
StartLimitBurst=3
StartLimitInterval=60s
[Install]
WantedBy=multi-user.target
此处的–insecure-registry=127.0.0.1(此处改成你私服ip)设置是针对有搭建了自己私服Harbor时允许docker进行不安全的访问,否则访问将会被拒绝。
3.5 启动docker
给docker.service文件添加执行权限
chmod +x /etc/systemd/system/docker.service
重新加载配置文件(每次有修改docker.service文件时都要重新加载下)
systemctl daemon-reload
启动
systemctl start docker
设置开机启动
systemctl enable docker.service
查看docker服务状态
systemctl status docker