技術標籤：Linux一名實施工程師的自我修養

1.下載介質

Docker下載連結
此處選擇的是18.06.03-ce.tgz

2.上傳並解壓

tar -xvf docker-18.06.3-ce.tgz 

3.移動到bin目錄下

cp docker/* /usr/bin/

4. 新增docker配置檔案

[[email protected] docker]# vi /etc/systemd/system/docker.service

[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

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

5.啟動docker

chmod 777 /etc/systemd/system/docker.service
systemctl daemon-reload
systemctl start docker
systemctl enable docker.service

6.驗證啟動情況

docker ps               #驗證docker是否正常啟動

[[email protected] docker]# docker ps
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
[[email protected] docker]#

補充問題：
用非root使用者啟動docker時會需要進行授權，在docker ps時也提示沒許可權，解決方法，直接把普通使用者加到root組……

[[email protected] bin]# usermod -g  root nrms
[[email protected] bin]# su nrms
[[email protected] bin]$ docker ps
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
[[email protected] bin]$

報錯內容：

[[email protected] docker]$ systemctl daemon-reload
==== AUTHENTICATING FOR org.freedesktop.systemd1.reload-daemon ===
Authentication is required to reload the systemd state.
Authenticating as: root
Password: 
==== AUTHENTICATION COMPLETE ===
[[email protected] docker]$ systemctl start docker
==== AUTHENTICATING FOR org.freedesktop.systemd1.manage-units ===
Authentication is required to manage system services or units.
Authenticating as: root
Password: 
==== AUTHENTICATION COMPLETE ===
[[email protected] docker]$ systemctl enable docker.service
==== AUTHENTICATING FOR org.freedesktop.systemd1.manage-unit-files ===
Authentication is required to manage system service or unit files.
Authenticating as: root
Password: 
==== AUTHENTICATION COMPLETE ===
Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /etc/systemd/system/docker.service.
==== AUTHENTICATING FOR org.freedesktop.systemd1.reload-daemon ===
Authentication is required to reload the systemd state.
Authenticating as: root
Password: 
==== AUTHENTICATION COMPLETE ===
[[email protected] docker]$ docker

[[email protected] docker]$ docker ps
Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get http://%2Fvar%2Frun%2Fdocker.sock/v1.38/containers/json: dial unix /var/run/docker.sock: connect: permission denied
[[email protected] docker]$ exit

參考：
離線安裝docker-docker-18.06.1-ce.tgz
解決Ubuntu18.04啟動Docker“Got permission denied while trying to connect to the Docker daemon socket“問題
docker 許可權問題 Got permission denied while trying to connect to the Docker daemon socket at 。。。