Communication between containers & data sharing between containers

Communication between containers

One-way communication

# 运行一个名字是web的tomcat容器 并且链接到database容器，可以进入容器内直接ping database，可以在容器能查看到配置到了/etc/hosts的文件
docker run -d --name web --link database tomcat

Bridge two-way communication

• List the current docker network service details

docker network ls

• New bridge

docker network create -d bridge my-bridge

• Connect the container to the bridge

docker network connect my-bridge web
docker network connect my-bridge database

Data sharing between containers

• Mount the host directory by setting -v

• format:

• docker run --name container name -v host path: mirror name of the mount path in the container

• Share the mount point in the container via --volumes-from

• Create a shared container

• docker create --name webpage -v /webapps:/tomcat/webapps tomcat /bin/true

• Shared container mount point

• docker run --volumes-from webpage --name t1 -d tomcat