CentOS8 container management tool Podman

The newly installed CentOS8 system in the new year, after installing it, found that there was no Docker. Later, I discovered that CentOS8 uses Podman as the default container management tool. I probably looked at the help. In fact, the usage of Podman is almost the same as the original docker, and the commands are basically the same. Let's take a look at how Podman manages containers.

installation##

CentOS8 uses dnf as the package manager, of course yum can still be used.

$ sudo dnf install podman

podman use##

I feel that the most obvious change between podman and docker is that podman does not need to start a background service, it can run directly, and can be run by ordinary users.

Pull mirror

$ podman pull nginx

Query mirror

$ podman images
REPOSITORY                TAG      IMAGE ID       CREATED      SIZE
docker.io/library/nginx   latest   2073e0bcb60e   2 days ago   131 MB

Start the container

$ podman run -d -p 8000:80 nginx
6988640 b68226332f0d998b9dfe1bdd4dcd20f0cb25e3fd8f46859c787941919

View container instance

$ podman ps 
CONTAINER ID  IMAGE                           COMMAND               CREATED        STATUS            PORTS                 NAMES
6988640 b6822  docker.io/library/nginx:latest  nginx -g daemon o...5 minutes ago  Up 5 minutes ago  0.0.0.0:8000->80/tcp  nostalgic_banzai

Stop the instance

$ podman stop 6988640b6822
6988640 b68226332f0d998b9dfe1bdd4dcd20f0cb25e3fd8f46859c787941919

Delete instance

$ podman rm 6988640b6822
6988640 b68226332f0d998b9dfe1bdd4dcd20f0cb25e3fd8f46859c787941919