Container Runtime Friction: Podman Hanging When Pulling n8n Images

Incident snapshot

Following the n8n docs but substituting podman for Docker resulted in a stalled image pull. While podman aims to be Docker-compatible, differences in rootless modes, registries configuration, DNS resolution, and authentication mean a one-to-one replacement can lead to surprising failures-especially in constrained or corporate network environments.

Operational impacts

When developers or ops teams cannot reliably fetch images, local testing and deployment pipelines stall. This slows feature delivery and can block emergency fixes. For organizations standardizing on a runtime for security or compliance reasons, silent failures during image pull add friction and increase support overhead.

Troubleshooting and mitigation steps

Diagnostic steps: run podman with debug logging, test DNS and firewall connectivity to the registry, and attempt a pull with skopeo or docker to isolate the problem. Check registries.conf for mirror and auth settings, and examine rootless versus rootful behavior (network namespaces differ). Workarounds include pulling the image on a machine that works and pushing to a private registry, using an alternative runtime (docker or containerd) in CI, or pre-caching images in your cluster.

Guidance for leaders

Standardize and document supported container runtimes and provide preconfigured developer images or a private registry to avoid environment drift. Ensure CI pipelines pre-pull and cache images and include podman compatibility tests if it's a supported runtime. Investing in a small DevOps playbook for container runtime quirks saves repeated troubleshooting and accelerates developer onboarding.