Triage workflow
Run apachectl configtest, then apachectl -S. Correlate ErrorLog with deploys and cert renewals.
Signature catalog
| Step | Action | Watch for |
|---|---|---|
| AH00558 | Set global ServerName | Stabilize self-referential URLs |
| AH00072 | ss/lsof on Listen port | Duplicate Listen or other daemon |
| AH01630 | RequireAny/All maps | Legacy Order/Allow mixing |
| SSL errors | openssl s_client -servername | Chain, SNI, clock skew |
| MaxRequestWorkers | ExtendedStatus | Slow upstream, TLS load |
mod_rewrite
Short LogLevel rewrite:trace3 in staging; see .htaccess, Apache configuration.