https://www.notion.so/Podman-6c02911b97b64ff8b44af35eb4019674
The alternative of docker as docker is no longer free for enterprise users.
Installation
Install from download
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wget https://github.com/containers/podman/releases/latest/download/podman-remote-static-linux_amd64.tar.gz
tar -xvzf podman-remote-static-linux_amd64.tar.gz
sudo mv ./bin/podman-remote-static-linux_amd64 /usr/local/bin/podman
sudo chmod +x /usr/local/bin/podman
Examples
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# If you want to keep your existing volumns, you should use --userns=keep-id,
# otherwise, it might throw "operation not permitted" when start a container
podman run -d --name my-container --userns=keep-id \
-v /your-path:/path
image-name
Configure sources
Open /etc/containers/registries.conf and uncomment below line, so that you can pull images from other sources.
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unqualified-search-registries = ["registry.fedoraproject.org", "registry.access.redhat.com", "docker.io"]
Jenkins in Podman
Run podman in jenkins pipeline if jenkins is running in container
Mount the socket of podman into jenkins container.
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docker run -d \
--name my-jenkins \
-p 8080:8080 \
-v /home/<host_user>/jenkins_home:/var/jenkins_home \
-v /run/user/1000/podman/podman.sock:/run/user/1000/podman/podman.sock \
bndynet/jenkins
Then run it in pipeline:
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pipeline {
agent any
stages {
stage('Run Podman') {
steps {
sh 'export PODMAN_HOST=unix:///run/user/1000/podman/podman.sock && podman run --rm hello-world'
}
}
}
}
Let jenkins account run podman
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sudo usermod --add-subuids 100000-165535 --add-subgids 100000-165535 jenkins
If the jenkins user does not exist, please create one:
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sudo useradd -m -s /bin/bash jenkins
sudo passwd jenkins # set password（optional）
Restart jenkins
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sudo systemctl restart jenkins
# or podman restart jenkins-container
Automatically Start
Podman provides generate systemd command, that can generate systemd service file to restart when server starts.
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podman generate systemd --name my-container --restart-policy=always > /etc/systemd/system/my-container.service
Then enable and start service:
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systemctl daemon-reload
systemctl enable my-container
systemctl start my-container
In this way, my-container will start automatically, it likes docker –restart unless-stopped.
Q&A
Can not “podman machine start”?
You need to remove the current machine via podman machine rm. and reinit via podman machine init.