mrcharles
30ddb37b34
Commit 33b5c76 claimed to harden Pi-hole on both DNS nodes but only
modified markdown — the working docker-compose.yml, gravity-validate.sh,
healthcheck, and autoheal config were never written to the repo, leaving
the DNS hardening unreproducible from version control.
This commits the live, verified-working config from the boxes into
netinfra/pihole/:
- docker-compose.yml (shm_size 1024M root-cause fix, healthcheck, autoheal)
- gravity-validate.sh (pre-start SQLite header check, auto-quarantine corrupt DB)
- .env.example (web UI password templated; real .env gitignored)
Defends against the gravity.db / /dev/shm corruption production outage.
The live password is templated as ${PIHOLE_WEB_PASSWORD} so no secret
enters git.
[#376]
50 lines
1.4 KiB
YAML
50 lines
1.4 KiB
YAML
services:
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pihole:
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container_name: pihole
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# Root cause of the 2026-08 gravity.db corruption: default /dev/shm (64M)
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# was too small for FTL's shared-memory metrics. 1024M has been stable.
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shm_size: '1024M'
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image: pihole/pihole:latest
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hostname: pihole
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entrypoint: ["/usr/local/bin/gravity-validate.sh"]
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ports:
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- "53:53/tcp"
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- "53:53/udp"
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- "10002:80/tcp"
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- "10003:443/tcp"
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environment:
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TZ: 'America/Chicago'
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FTLCONF_webserver_api_password: '${PIHOLE_WEB_PASSWORD}'
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FTLCONF_dns_listeningMode: 'all'
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volumes:
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- './etc-pihole:/etc/pihole'
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- './etc-dnsmasq.d:/etc/dnsmasq.d'
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- './gravity-validate.sh:/usr/local/bin/gravity-validate.sh:ro'
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cap_add:
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- SYS_NICE
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restart: always
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healthcheck:
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test: ["CMD-SHELL", "dig +short +norecurse @127.0.0.1 pi.hole >/dev/null 2>&1 && test -s /etc/pihole/gravity.db || exit 1"]
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interval: 30s
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timeout: 10s
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retries: 3
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start_period: 60s
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labels:
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autoheal: "true"
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networks:
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- default
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- dnsnet
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autoheal:
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container_name: autoheal
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image: willfarrell/autoheal:latest
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environment:
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AUTOHEAL_CONTAINER_LABEL: autoheal
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AUTOHEAL_INTERVAL: 30
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AUTOHEAL_START_PERIOD: 60
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volumes:
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- '/var/run/docker.sock:/var/run/docker.sock:ro'
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restart: always
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networks:
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dnsnet:
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external: true
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