linux下安装docker

拼搏现实的明天。 2023-07-14 05:49 80阅读 0赞

目前位置docker很受欢迎的，当然相比k8s来说，docker稍微没有那么强大，但是依然应用广泛和方便，下面来讲一下docker的两种安装方式

第一种：yum源安装

这种方式安装比较简单，但是首先要确保服务器上装有yum（一般都会自带有）。

首先检查一下是不是存在docker

yum list installed | grep docker

如果不存在就直接安装

yum -y install docker

启动docker

systemctl start docker
    #停止是stop

查看docker状态

systemctl status docker

![format_png][]![format_png][]

可以看到是激活状态，说明安装成功

第二种方式是离线安装：

**安装包官方地址**：[https://download.docker.com/linux/static/stable/x86\_64/][https_download.docker.com_linux_static_stable_x86_64]

wget https://download.docker.com/linux/static/stable/x86_64/docker-18.06.3-ce.tgz

解压

tar -zxvf docker-18.06.3-ce.tgz

**将解压出来的docker文件复制到 /usr/bin/ 目录下**

cp docker/* /usr/bin/

** 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

** 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

![format_png 1][]

上图表示docker已安装成功

可能会有人说，为啥yum源安装这么简单还要去看离线安装，其实我想说只是留作备用，万一yum安装一直出现问题还是可以尝试一下离线安装的，无论是哪种安装只要成功就好了！

[format_png]: /images/20230529/4e605d0218f947c896718d07b43a9070.png
[https_download.docker.com_linux_static_stable_x86_64]: https://download.docker.com/linux/static/stable/x86_64/
[format_png 1]: /images/20230529/d97bb159673f431898910fc472ea4475.png