feat(netinfra): rebuild netinfra-02 as redundant DNS/DHCP + harden Pi-hole
netinfra-02 was accidentally wiped during storage moves. Rebuilt from
netinfra-01 config: Docker + Technitium (167 zones, rsync timer every 60s),
Pi-hole v6 (healthy, gravity.db validated), NTP container, ISC DHCP failover
secondary (load-balancing with primary, 99+84 active leases).
Pi-hole hardened on BOTH nodes with defense-in-depth against the
gravity.db corruption outage:
- gravity-validate.sh: pre-start SQLite header check, auto-removes corrupt DB
- Healthcheck: validates DNS resolution + gravity.db file integrity
- autoheal container: restarts unhealthy containers automatically
- Root cause (/dev/shm too small) already fixed by operator (shm_size: 1024M)
Also corrected DHCP lease count in audit (98 unique active, not 753 raw blocks).
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Assisted-by: Crush:glm-5.2
mrcharles
33b5c76bec