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79 lines
2.7 KiB
79 lines
2.7 KiB
# Using Podman instead of Docker
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Podman has an [Docker API compatibility layer](https://podman.io/blogs/2020/06/29/podman-v2-announce.html#restful-api). k3d uses the Docker API and is compatible with Podman v4 and higher.
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!!! important "Podman support is experimental"
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k3d is not guaranteed to work with Podman. If you find a bug, do help by [filing an issue](https://github.com/k3d-io/k3d/issues/new?labels=bug&template=bug_report.md&title=%5BBUG%5D+Podman)
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## Using Podman
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Ensure the Podman system socket is available:
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```bash
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sudo systemctl enable --now podman.socket
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# or sudo podman system service --time=0
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```
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To point k3d at the right Docker socket, create a symbolic link:
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```bash
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sudo ln -s /run/podman/podman.sock /var/run/docker.sock
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# or install your system podman-docker if available
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sudo k3d cluster create
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```
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Alternatively, set `DOCKER_HOST` when running k3d:
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```bash
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export DOCKER_HOST=unix:///run/podman/podman.sock
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export DOCKER_SOCK=/run/podman/podman.sock
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sudo --preserve-env=DOCKER_HOST --preserve-env=DOCKER_SOCK k3d cluster create
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```
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### Using rootless Podman
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Ensure the Podman user socket is available:
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```bash
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systemctl --user enable --now podman.socket
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# or podman system service --time=0
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```
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Set `DOCKER_HOST` when running k3d:
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```bash
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XDG_RUNTIME_DIR=${XDG_RUNTIME_DIR:-/run/user/$(id -u)}
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export DOCKER_HOST=unix://$XDG_RUNTIME_DIR/podman/podman.sock
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export DOCKER_SOCK=$XDG_RUNTIME_DIR/podman/podman.sock
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k3d cluster create
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```
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### Using remote Podman
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[Start Podman on the remote host](https://github.com/containers/podman/blob/main/docs/tutorials/remote_client.md), and then set `DOCKER_HOST` when running k3d:
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```
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export DOCKER_HOST=ssh://username@hostname
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export DOCKER_SOCK=/run/user/1000/podman/podman.sock
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k3d cluster create
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```
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## Creating local registries
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Because Podman does not have a default "bridge" network, you have to specify a network using the `--default-network` flag when creating a local registry:
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```bash
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k3d registry create --default-network podman mycluster-registry
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```
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To use this registry with a cluster, pass the `--registry-use` flag:
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```bash
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k3d cluster create --registry-use mycluster-registry mycluster
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```
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!!! note "Incompatibility with `--registry-create`"
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Because `--registry-create` assumes the default network to be "bridge", avoid `--registry-create` when using Podman. Instead, always create a registry before creating a cluster.
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!!! note "Missing cpuset cgroup controller"
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If you experince an error regarding missing cpuset cgroup controller, ensure the user unit `xdg-document-portal.service` is disabled by running `systemctl --user stop xdg-document-portal.service`. See [this issue](https://github.com/systemd/systemd/issues/18293#issuecomment-831397578)
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