~/talk

Containers are hideously undebuggable black boxes and we never should have invented them

Talkat linux.conf.au 2021 · 2021-01-23..01-25· [devops-and-delivery]

speaker

name:Tim Serong

mastodon:@tserong@wirejunkie.net

resources

video:https://youtu.be/pPZsN_urpqw

slides:none on file

summary

Ceph migrates packaged daemons to containers (Podman/Docker/Kubernetes) using cephadm and Rook, which eases deployment but adds indirection: troubleshooting requires running generated systemd unit run scripts, invoking Podman run, and checking the journal instead of /var/log. During Nautilus→Octopus upgrades two of six OSDs fail to start because the generated unit binds /var/run/ceph before the host dir exists (error: var/run/ceph fsid no such file or directory). Useful commands: cephadm shell, ceph orch ps; registry misconfiguration can pull mixed image versions.

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