修改Docker容器启动配置参数

有时候,我们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

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
sudo docker stop $(docker ps -a | awk '{ print $1}' | tail -n +2)
  • 停止docker服务
sudo service docker stop
cd /var/lib
  • 打包docker目录
sudo tar -czvf /usr/docker.tar.gz docker/
cd /usr/
sudo tar -xzvf docker.tar.gz
  • 修改docker默认的存储位置
sudo vim /etc/docker/daemon.json

{
    "graph": "/home/server/docker"
}
  • 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)
  • 查看修改后docker存储路径
docker info |grep 'Docker Root Dir'
WARNING: No swap limit support
Docker Root Dir: /usr/docker

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