personal_infra/ansible/roles/datum_gateway/templates/healthcheck.sh.j2

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datum-gateway: convert to a role, de-Uptime-Kuma the health check 802-line playbook becomes 68 lines (three plays: the role, the Caddy dashboard, the Stratum socket proxy) plus a 345-line role. datum_gateway_vars.yml is deleted; its content is the role's defaults. Verified after a real run with zero miners connected: datum-gateway restarted cleanly onto the reformatted config, deployed config.json semantically identical to what was there (pool_address bc1qvrj3g84..., pool_pass_* false, ports unchanged), health check timer firing, and the Knots side untouched - bitcoind still up since 2026-08-19 with blocknotify intact. TWO PIECES OF DRIFT WHERE THE NODE WAS RIGHT, both confirmed with the operator: - datum_mining_address: the vault held bc1qdse9dsg... while the node had been mining to bc1qvrj3g... since 2026-08-08. This is WHERE BLOCK REWARDS ARE PAID. And unlike fulcrum and bitcoin-knots, the `Restart datum-gateway` handler here was never gated, so the stale value would have applied immediately rather than sitting inert on disk. - pool_pass_workers / pool_pass_full_users: false on the node, true in the vars file. Both corrected in the vault and role defaults with notes recording why. Comparing this config needs semantics, not text: the live file is single-line JSON and the template renders pretty-printed, so a textual diff is pure noise. Rendering it and comparing parsed JSON is what surfaced both differences. config.json carries bitcoind.rpcpassword and api.admin_password, and --diff prints rendered content - so `--check --diff` put them on the terminal. The task now sets diff: false by default (-e datum_reveal_config=true to opt in). Those two should be rotated. I also mis-reported pool_pass_workers/pool_pass_full_users as exposed credentials because my masking matched "pass" in the key name. They are BOOLEANS, and mining.pool_address is a Bitcoin address, public by nature. Only the two real passwords above were exposed. `Configure cmake build` and `Compile datum_gateway` are bare command: tasks with no changed_when, so they recompile on every run. The build is reproducible - Install datum_gateway binary sees identical content and leaves the installed binary's timestamp alone - but it is wasted work each time. Documented as the idempotent floor. Ownership parity checked mechanically against `git show HEAD:` keyed by task name: 7/7 match, 9 Kuma tasks dropped. This completes Plan 6 Stage 2: all six services in the list are roles. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-09-13 18:25:41 +02:00
#!/bin/bash
# DATUM Gateway health check — managed by Ansible (roles/datum_gateway)
#
# The exit code is the answer and systemd keeps it:
# systemctl is-failed datum-gateway-healthcheck.service
# Reporting anywhere else is optional and generic.
PUSH_URL="${HEALTHCHECK_PUSH_URL:-}"
STRATUM_PORT={{ datum_gateway_stratum_port }}
check_datum() {
# Service must be active and stratum port must be listening
systemctl is-active --quiet datum-gateway && \
nc -z 127.0.0.1 "${STRATUM_PORT}"
}
report() {
local status=$1
local msg=$2
# No push URL is normal, not an error: the exit code below is still a
# complete answer for anything reading unit state.
[ -n "$PUSH_URL" ] || return 0
curl -s --max-time 10 --retry 2 -o /dev/null \
"${PUSH_URL}?status=${status}&msg=${msg// /%20}&ping=" || true
}
if check_datum; then
report "up" "OK"
exit 0
else
report "down" "DATUM Gateway not responding"
exit 1
fi