Podman Basic and Advanced Usage
Basic usage
$ alias docker=podman
$ podman --version # Check version
$ sudo podman login -u USER_NAME REGISTRY_URL
# Login to Registry
$ sudo podman login -u USER_NAME \
-p ${TOKEN} \
REGISTRY_URL
# Login with token or password
# eg: in OpenShift, token can retrive as
# $ TOKEN=$(oc whoami -t)
$ podman logout quay.io # Remove login credentials for registry.redhat.io
$ podman logout --all # Remove login credentials for all registries
$ podman search REGISTRY_URL/IMAGE_NAME
# search for an image in registry
$ sudo podman run --name test -u 1234 \
-p 8080:8080 -d s2i-sample-app
$ sudo podman run -d --name TEST \
quay.io/USER_NAME/IMAGE_NAME:VERSION
# Create a container
$ podman run --privileged quay.io/podman/stable podman run ubi8 echo hello
# The easiest way to run Podman inside of a container is to use the --privileged flag.
$ sudo podman ps # List running containers
$ sudo podman stop CONTAINER_NAME # STOP running containers
$ sudo podman rm CONTAINER_NAME # remove running containers
$ sudo podman rmi IMAGE_NAME # delete container image
$ sudo podman logs CONTAINER_NAME
# check logs of running container
$ sudo podman build -t NAME . # build container image from Dockerfile and spec
$ sudo podman images # see available images
Advanced usage
## Rootful Podman in rootful Podman with --privileged
podman run --privileged quay.io/podman/stable podman run ubi8 echo hello
## added volume
podman run --privileged -v ./mycontainers:/var/lib/containers quay.io/podman/stable podman run ubi8 echo hello
## Rootless Podman in rootful Podman with --privileged
podman run --user podman --privileged quay.io/podman/stable podman run ubi8 echo hello
## Rootful Podman in rootful Podman without --privileged
podman run --cap-add=sys_admin,mknod --device=/dev/fuse --security-opt label=disable quay.io/podman/stable podman run ubi8-minimal echo hello
## Run podman inside podman and check podman version
$ podman run --privileged \
quay.io/podman/stable \
podman version
## Run podman inside podman and using ubi8 image inside.
$ podman run --privileged \
quay.io/podman/stable \
podman run ubi8 echo hello
$ podman run -it --privileged \
docker.io/mysticrenji/podman \
podman version
$ podman run -it --privileged \
docker.io/mysticrenji/podman \
podman run -d docker.io/library/node:12-alpine
$ podman run -it --privileged \
docker.io/mysticrenji/podman \
podman version && git version uptime\
uptime;\
git version;\
git clone https://github.com/mysticrenji/podman-experiments.git;\
cd podman-experiments;\
podman-compose up -d;\
podman-compose down
podman images
Container commands list
| Command | Man Page | Description |
|---|---|---|
| attach | podman-container-attach(1) | Attach to a running container |
| checkpoint | podman-container-checkpoint(1) | Checkpoint a container |
| cleanup | podman-container-cleanup(1) | Cleanup network and mount points of a container |
| commit | podman-container-commit(1) | Commit a container into an image |
| cp | podman-container-cp(1) | Copy files/folder into and out of containers |
| create | podman-container-create(1) | Create a new container |
| diff | podman-container-diff(1) | Inspect changes in a containers file system |
| exec | podman-container-exec(1) | Run a process in a container |
| exists | podman-container-exists(1) | Check if a container exists |
| export | podman-container-export(1) | Export container’s filesystem as a tar archive |
| init | podman-container-init(1) | Init a container |
| inspect | podman-container-inspect(1) | Display detailed information on a container |
| kill | podman-container-kill(1) | Send a signal to containers in container |
| List (ps) | podman-container-list(1) | List all of the containers |
| logs | podman-container-logs(1) | Fetch logs for a container |
| mount | podman-container-mount(1) | Mount a container’s root filesystem |
| pause | podman-container-pause(1) | Pause container |
| port | podman-container-port(1) | List port mappings for a container |
| prune | podman-container-prune(1) | Remove all non running containers |
| rename | podman-container-rename(1) | Rename an existing container |
| restart | podman-container-restart(1) | Restart a container |
| restore | podman-container-restore(1) | Restore a checkpointed container |
| rm | podman-container-rm(1) | Remove a container |
| run | podman-container-run(1) | Run a command in a new container |
| runlabel | podman-container-runlabel(1) | Execute the command described by an image label |
| start | podman-container-start(1) | Start a container |
| stats | podman-container-stats(1) | Display statistics for a container |
| stop | podman-container-stop(1) | Stop a container |
| top | podman-container-top(1) | Display running process in container |
| unmount | podman-container-unmount(1) | Unmount a container’s root filesystem |
| unpause | podman-container-unpause(1) | Unpause all the containers in a pod |
| wait | podman-container-wait(1) | Wait for a container to exit |
Pod commands list
| Command | Man Page | Description |
|---|---|---|
| create | podman-pod-create(1) | Create a new pod |
| exists | podman-pod-exists(1) | Check if a pod exists |
| inspect | podman-pod-inspect(1) | Display detailed information on a pod |
| kill | podman-pod-kill(1) | Send a signal to containers in pod |
| list | podman-pod-list(1) | List all of the pods |
| logs | podman-pod-logs(1) | Fetch logs for pod with one or more containers |
| pause | podman-pod-pause(1) | Pause all the containers in a pod |
| prune | podman-pod-prune(1) | Remove all stopped pods and their containers |
| restart | podman-pod-restart(1) | Restart a pod |
| rm | podman-pod-rm(1) | Remove one or more pods |
| stats | podman-pod-stats(1) | Display statistics for the containers in a pods |
| start | podman-pod-start(1) | Start a pod |
| stop | podman-pod-stop(1) | Stop a pod |
| top | podman-pod-top(1) | Display running process in the pod |
| unpause | podman-pod-unpause(1) | Unpause all the containers in a pod |
Podman on MacOS
## Intall podman and qemu
brew install podman qemu
podman machine init
podman machine start
Podman vs Docker
How to pull images from docker hub in podman
Method 1
podman pull docker.io/library/redis
Method 2
Edit /etc/containers/registries.conf or $HOME/.config/containers/registries.conf, and add
unqualified-search-registries = ["docker.io", "quay.io"]
Then
podman pull nginx
Reference
https://podman.io/https://cloudnweb.dev/2019/06/replacing-docker-with-podman-power-of-podman/https://www.redhat.com/sysadmin/podman-inside-kubernetes- Podman in Action - The next generation of container engines (Dan Walsh)
- Podman for DevOps: Containerization reimagined with Podman and its companion tools (Alessandro Arrichiello, Gianni Salinetti)
https://devopscube.com/podman-tutorial-beginners/
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