修改Docker容器启动配置参数-白红宇

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/de9c6501cdd3cp hostconfig.json hostconfig.json.bakcp 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 supportDocker 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 stopcd /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 supportDocker Root Dir: /usr/docker