A rule allowing a port from a specific address, for a service that had been containerised and moved two years earlier. A rule allowing traffic to a closed…
A major distribution release, and a rebuild rather than an upgrade, which took four hours because the provisioning script had been fixed in February. The February exercise is…
A worker container killed after ten seconds on every deploy, because the signal never reached the process. Shell form versus exec form is the difference between a graceful…
A crontab line from 2019 calling a script that had been rewritten twice and moved once, still working because of a symlink nobody remembered. Every layer was added…
A rebuilt host that dropped connections under load, and a kernel parameter set by hand in 2020. Diffing the full kernel parameter set between the old and new…
A diff between what the provisioning script installs and what is actually on the host. Six of the eleven are diagnostic tools somebody installed at three in the…