Building test-driven infrastructure with Bash Automated Testing System (BATS): creating 27 pre-change validation tests for websites, redirects, SSL endpoints, and dynamic content to answer "does everything still work?"
Troubleshooting MikroTik CCR1036 SNMP failure on loopback interface: packet captures reveal implementation quirk refusing to return traffic via different interface than request arrived on, requiring monitoring via closest interface IP.
Building distributed monitoring with SaltStack returners to CouchDB: storing nagios check results globally from multiple VPS locations, visualizing traceroutes/latency, and designing contextual alerts beyond simple up/down states.
Observium 0.14.11 released on schedule: new alerting system, Cisco ASA IPv4 session graphing from FIREWALL-MIB, Cambium Canopy support, and enabling built-in VMware ESXi SNMP monitoring.
Multi-phase migration to BGP-announced IP space: AS62758 turnup, moving LMS and external services from provider IPs, pre-change testing with reduced DNS TTLs, 1:1 NAT configs, and phased rollout strategy.
