| Identified misleading symptom |
Ignored the alert volume; immediately checked why pods were restarting (probe failures) |
Checked Alertmanager config first, then pivoted to pod investigation |
Spent extended time tuning Alertmanager routing, grouping, or inhibition rules |
| Found root cause in networking domain |
Identified DNS latency from extra search domains + ndots:5 as the cause of slow health checks |
Found the health check was slow but not the DNS resolution cause |
Assumed the health check endpoint or Elasticsearch was the problem |
| Remediated in kubernetes domain |
Fixed probe design (liveness vs readiness split), increased timeout, and fixed DNS config |
Increased the probe timeout but did not fix the DNS or probe design |
Restarted pods or suppressed alerts without fixing the root cause |
| Cross-domain thinking |
Explained the full chain: DNS config -> latency -> probe timeout -> pod restart -> alert storm |
Acknowledged DNS and probe interaction but missed the alert storm misdirection |
Treated it as a single-domain observability or application issue |