- 创建容器时的端口映射
docker run -d -p 80:80 --name name
- 替换容器, 需要停止容器,
$ docker stop A
$ docker commit A imageA #将容器commit提交成为一个镜像
$ docker rm A #删除原镜像
$ docker run -d -p 80:80 --name A imageA #启动新镜像
- 修改容器的配置, 需要重启 DOCKER 服务, 否则会失败
停止容器, 停止服务 (systemctl stop docker/service docker stop)
$ docker stop A
$ systemctl stop docker
修改 /var/lib/docker/containers/{容器 ID+ 一些字符串}/hostconfig.json 中
"PortBindings":{"容器端口 /tcp":[{"HostIp":"","HostPort":"宿主机端口"}]
同时修改同目录下的 config.v2.json 中 “ExposedPorts”:{“容器端口 /tcp”:{}}
"Ports":{"容器端口 /tcp":[{"HostIp":"0.0.0.0","HostPort":"宿主机端口"}]}
重启服务, 启动容器 (systemctl start docker/service docker start)
$ systemctl start docker
$ docker start A
例 hostconfig.json 已删除不相关配置, 只保留格式
{
"Config": {
"ExposedPorts": {
"5700/tcp": {},
"6700/tcp": {},
"9000/tcp": {}
}
},
"NetworkSettings": {
"Ports": {
"5700/tcp": [{
"HostIp": "0.0.0.0",
"HostPort": "10086"
}],
"6700/tcp": [{
"HostIp": "0.0.0.0",
"HostPort": "6700"
}],
"9000/tcp": [{
"HostIp": "0.0.0.0",
"HostPort": "8080"
}]
}
}
}
例 config.v2.json 已删除不相关配置, 只保留格式
{
"PortBindings": {
"5700/tcp": [{
"HostIp": "",
"HostPort": "10086"
}],
"6700/tcp": [{
"HostIp": "",
"HostPort": "6700"
}],
"9000/tcp": [{
"HostIp": "",
"HostPort": "8080"
}]
}
}
- 在容器运行时添加映射
iptables -t nat -A DOCKER -p tcp --dport 宿主机端口 -j DNAT --to-destination 容器ip:容器端口
查看容器 ip
docker inspect --format='{{.NetworkSettings.IPAddress}}' $(docker ps -a -q)
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
