Thursday, November 27, 2025

 

Podman : Generate Systemd unit file

 

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      5.4.2-1753478586  ddf2e42fec3b  19 minutes ago     737 kB
docker.io/library/root-web  latest            3cc41f7733a0  25 minutes ago     157 MB
srv.world/iproute           latest            77debccd9811  36 minutes ago     156 MB
srv.world/debian-nginx      latest            33b7b5b10b13  About an hour ago  157 MB
srv.world/debian-apache2    latest            a0aca892bf29  About an hour ago  234 MB
docker.io/library/debian    latest            047bd8d81940  11 days ago        124 MB
docker.io/library/mariadb   latest            300929c28ab7  13 days ago        336 MB
docker.io/moby/buildkit     buildx-stable-1   44f5d48d5c6c  7 weeks ago        219 MB
# file name ⇒ (any name).container

root@dlp:~# 
vi /etc/containers/systemd/debian-nginx.container
[Unit]
Description=Nginx container
After=local-fs.target

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

[Service]
Restart=always

[Install]
WantedBy=multi-user.target default.target
root@dlp:~# 
systemctl daemon-reload

root@dlp:~# 
systemctl start debian-nginx.service
[2]Configure pod service by using Quadlet.
root@dlp:~# 
podman images

REPOSITORY                  TAG               IMAGE ID      CREATED            SIZE
localhost/podman-pause      5.4.2-1753478586  ddf2e42fec3b  20 minutes ago     737 kB
docker.io/library/root-web  latest            3cc41f7733a0  26 minutes ago     157 MB
srv.world/iproute           latest            77debccd9811  37 minutes ago     156 MB
srv.world/debian-nginx      latest            33b7b5b10b13  About an hour ago  157 MB
srv.world/debian-apache2    latest            a0aca892bf29  About an hour ago  234 MB
docker.io/library/debian    latest            047bd8d81940  11 days ago        124 MB
docker.io/library/mariadb   latest            300929c28ab7  13 days ago        336 MB
docker.io/moby/buildkit     buildx-stable-1   44f5d48d5c6c  7 weeks ago        219 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: debian-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
root@dlp:~# 
podman pod ls

POD ID        NAME           STATUS      CREATED        INFRA ID      # OF CONTAINERS
d6d95a44c29b  nginx-pod-pod  Running     6 seconds ago  223ba85b3446  2
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