What is docker's guarded container?

Docker's daemon container is a container that has no long-term running, no interactive session and is suitable for running applications and services; you can use the "docker run -d image name [COMMAND] [ARG...]" command To start the daemon container, the parameter is set to "-d" to use the background running method when starting the container.

The operating environment of this tutorial: linux7.3 system, docker version 19.03, Dell G3 computer.

What is docker’s guard container

What is a guard container

• Can run for a long time

• No interactive sessions

• Suitable for running applications and services

Extended knowledge

Run the container in daemon mode

The easiest way is to ctrl p, ctrl pExit the container, so that the container will run in the background:

$ docker run -i -t IMAGE /bin/bash
Ctrl+P Ctrl+Q

If you want to enter this running container again, you can use docker attachCommand to attach to a running container:

docker attach 容器名

##Start daemon container

run command to start the daemon container?

$ docker run -d 镜像名 [COMMAND] [ARG...]

-d will tell the system to run in the background when starting the container. However, if the background operation ends, the container will still stop, so a loop is used here to keep the background running:

View container log

$ docker logs [-f] [-t] [--tail] 容器名

• -f means always tracking the changes in the log and returning the results. –follows=True|False The default is false;

• -t means adding a timestamp to the returned results. –timestamps=true|false Default is false.

• --tail indicates the number of logs returned at the end. --tail="all". If not specified, logs will return all logs.

View the processes in the container

top through docker Command to view the process of a running container

$ docker top 容器名

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