修改 Docker容器 自动启动/不自动启动，挂载路径，存储位置

有时候创建容器时忘了添加参数 --restart=always，当 Docker 重启时，容器未能自动启动，

现在要添加该参数怎么办呢，方法有二：

1、Docker 命令修改

docker container update --restart=always 容器名字

实际运行时，可以支持同时配置多个容器id，比如（其中container关键字可以忽略不写）

docker update 87cd61ad7f7c f488b0479f24 2109903220ce 1fb346ea1a46 --restart=always
docker update 87cd61ad7f7c f488b0479f24 2109903220ce 1fb346ea1a46 --restart=no

2、直接改配置文件

首先停止容器，不然无法修改配置文件

配置文件路径为：/var/lib/docker/containers/容器ID

在该目录下找到一个文件 hostconfig.json ，找到该文件中关键字 RestartPolicy

修改前配置："RestartPolicy":{"Name":"no","MaximumRetryCount":0}

修改后配置："RestartPolicy":{"Name":"always","MaximumRetryCount":0}

最后启动容器。

修改docker容器的挂载路径

停止所有docker容器

sudo docker stop $(docker ps -a | awk '{ print $1}' | tail -n +2)

停止docker服务

sudo service docker stop

修改mysql路径

    cd ~
    sudo cp -r mysql/ /home/server/

备份容器配置文件

    cd /var/lib/docker/containers/de9c6501cdd3
    cp hostconfig.json hostconfig.json.bak
    cp config.v2.json config.v2.json.bak

修改hostconfig的冒号前的配置路径

    vi hostconfig.json

    "Binds": ["/home/server/mysql/conf/my.cnf:/etc/mysql/my.cnf", "/home/server/mysql/logs:/logs", "/home/server/mysql/data:/mysql_data"],

修改config的Source的配置路径

    vi config.v2.json

           "MountPoints": {

                  "/etc/mysql/my.cnf": {

                         "Source": "/home/server/mysql/conf/my.cnf",

                         "Destination": "/etc/mysql/my.cnf",

                         "RW": true,

                         "Name": "",

                         "Driver": "",

                         "Relabel": "",

                         "Propagation": "rprivate",

                         "Named": false,

                         "ID": ""

                  },

                  "/logs": {

                         "Source": "/home/server/mysql/logs",

                         "Destination": "/logs",

                         "RW": true,

                         "Name": "",

                         "Driver": "",

                         "Relabel": "",

                         "Propagation": "rprivate",

                         "Named": false,

                         "ID": ""

                  },

                  "/mysql_data": {

                         "Source": "/home/server/mysql/data",

                         "Destination": "/mysql_data",

                         "RW": true,

                         "Name": "",

                         "Driver": "",

                         "Relabel": "",

                         "Propagation": "rprivate",

                         "Named": false,

                         "ID": ""

                  },

                  "/var/lib/mysql": {

                         "Source": "",

                         "Destination": "/var/lib/mysql",

                         "RW": true,

                         "Name": "85d91bff7012b57606af819480ce267449084e81ab386737c80ace9fe75f6621",

                         "Driver": "local",

                         "Relabel": "",

                         "Propagation": "",

                         "Named": false,

                         "ID": "897cd0152dd152166cb2715044ca4a3915a1b66280e0eb096eb74c2d737d7f77"

                  }

           },

启动docker服务

 sudo service docker start

启动所有docker容器

sudo docker start $(docker ps -a | awk '{ print $1}' | tail -n +2)

修改docker默认的存储位置

docker 的所有images及相关信息存储位置为：/var/lib/docker

查看默认的docker存储路径

docker info |grep 'Docker Root Dir'
WARNING: No swap limit support
Docker Root Dir: /var/lib/docker

停止所有docker容器

docker stop $(docker ps -a | awk '{ print $1}' | tail -n +2)

停止docker服务

systemctl stop docker.service

mkdir -p /data/docker
rsync -avzP /var/lib/docker/* /data/docker/

修改docker默认的存储位置

vim /etc/docker/daemon.json

{
    "data-root": "/data/docker"
}

启动docker服务

systemctl start docker.service

启动所有docker容器

docker start $(docker ps -a | awk '{ print $1}' | tail -n +2)

查看修改后docker存储路径

docker info |grep 'Docker Root Dir'
WARNING: No swap limit support
Docker Root Dir: /data/docker