DNS Monitoring: Catch Record Drift and Outages
DNS monitoring alerts you when a record changes or stops resolving, the one failure that makes every other dashboard look perfectly healthy.
#devops
25 posts tagged "Devops".
Cron Job Monitoring: From Crontab to Monitors
Cron job monitoring starts with your crontab. Here is how to turn five schedule fields into an expected period, plus the DST trap that breaks them.
Prometheus Blackbox Exporter: Setup and Blind Spots
A working Prometheus blackbox exporter config, the relabel rules that trip people up, and the vantage-point problem no tutorial mentions.
Load Balancer Health Check: Settings That Matter
A load balancer health check decides which backends get traffic. Here are the four parameters, the shallow-versus-deep trap, and what to return.
Kubernetes Health Check: Probes, Timing, Blind Spots
A kubernetes health check has three forms and three consequences. Here are the handlers, the timing arithmetic, and the restart storm to avoid.
Ping Monitoring: What ICMP Checks Prove and Miss
Ping monitoring tells you an address answers ICMP, nothing more. Here is how echo requests work, what they hide, and when a TCP check is the better signal.