Podman : Generate Systemd unit file2025/01/21

	It's possible to generate Systemd unit file and set auto-starting for containers.
[1]	Configure container service by using Quadlet.

[root@dlp ~]#

podman images

REPOSITORY                  TAG               IMAGE ID      CREATED         SIZE
localhost/podman-pause      5.3.1-1733097600  d6ffe53ab076  38 minutes ago  701 kB
srv.world/centos-nginx      latest            451cd94e6c28  54 minutes ago  347 MB
docker.io/library/root-web  latest            3f60fa99e10d  58 minutes ago  347 MB
srv.world/iproute           latest            dfa2b401b86c  3 hours ago     346 MB
srv.world/centos-httpd      latest            ff3843182253  8 hours ago     354 MB
quay.io/centos/centos       stream10          1ef274445e32  7 days ago      311 MB
docker.io/moby/buildkit     buildx-stable-1   a72f628fa83e  5 weeks ago     207 MB
docker.io/library/mariadb   latest            6722945a6940  2 months ago    412 MB
docker.io/library/registry  latest            282bd1664cf1  15 months ago   26 MB

# file name ⇒ (any name).container

[root@dlp ~]#

vi /etc/containers/systemd/centos-nginx.container

[Unit]
Description=Nginx container
After=local-fs.target

[Container]
# any name
ContainerName=centos-nginx
# container image to be used
Image=srv.world/centos-nginx
# port
PublishPort=80:80

[Service]
Restart=always

[Install]
WantedBy=multi-user.target default.target

[root@dlp ~]#

systemctl daemon-reload

[root@dlp ~]#

systemctl start centos-nginx.service

[2]	Configure pod service by using Quadlet.

[root@dlp ~]#

podman images

REPOSITORY                  TAG               IMAGE ID      CREATED         SIZE
localhost/podman-pause      5.3.1-1733097600  d6ffe53ab076  39 minutes ago  701 kB
srv.world/centos-nginx      latest            451cd94e6c28  56 minutes ago  347 MB
docker.io/library/root-web  latest            3f60fa99e10d  59 minutes ago  347 MB
srv.world/iproute           latest            dfa2b401b86c  4 hours ago     346 MB
srv.world/centos-httpd      latest            ff3843182253  8 hours ago     354 MB
quay.io/centos/centos       stream10          1ef274445e32  7 days ago      311 MB
docker.io/moby/buildkit     buildx-stable-1   a72f628fa83e  5 weeks ago     207 MB
docker.io/library/mariadb   latest            6722945a6940  2 months ago    412 MB
docker.io/library/registry  latest            282bd1664cf1  15 months ago   26 MB

# create pod configuration file
# format is the same as Kubernetes

[root@dlp ~]#

vi /etc/containers/systemd/nginx-pod.yml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-pod
  labels:
    name: nginx-pod
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx-pod
  template:
    metadata:
      labels:
        app: nginx-pod
    spec:
      containers:
      - name: nginx-pod
        image: centos-nginx
        ports:
          - name: web
            containerPort: 80

# file name ⇒ (any name).kube

[root@dlp ~]#

vi /etc/containers/systemd/nginx-pod.kube

[Unit]
Description=Web service pod
After=local-fs.target

[Kube]
Yaml=/etc/containers/systemd/nginx-pod.yml
PublishPort=80:80

[Service]
Restart=always

[Install]
WantedBy=multi-user.target default.target

[root@dlp ~]#

systemctl daemon-reload

[root@dlp ~]#

systemctl start nginx-pod.service

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