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