60 lines
2.1 KiB
Text
60 lines
2.1 KiB
Text
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#!/bin/bash
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# xmrblocks health check — managed by Ansible (roles/xmrblocks)
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#
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# The exit code is the answer and systemd keeps it:
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# systemctl is-failed xmrblocks-healthcheck.service
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# Reporting anywhere else is optional and generic.
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#
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# This fetches a real page rather than just opening the port. The binary
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# resolves its HTML as "./templates" relative to the working directory, so a
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# deploy that got WorkingDirectory wrong listens happily on 8081 and fails
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# every request. A TCP check would call that healthy.
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URL="${XMRBLOCKS_URL:-http://127.0.0.1:8081}"
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PUSH_URL="${HEALTHCHECK_PUSH_URL:-}"
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PUSH_TOKEN="${HEALTHCHECK_PUSH_TOKEN:-}"
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report() {
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local status=$1
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local msg=$2
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# No push URL is normal, not an error: the exit code below is still a
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# complete answer for anything reading unit state.
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[ -n "$PUSH_URL" ] || return 0
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local encoded_msg="${msg// /%20}"
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local _ok=false
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[ "${status}" = "up" ] && _ok=true
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curl -s --max-time 15 --retry 2 -o /dev/null -X POST \
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-H "Authorization: Bearer ${PUSH_TOKEN}" \
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"${PUSH_URL}?success=${_ok}&error=${encoded_msg}" || true
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}
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# 90s, not the obvious 10 or 25. The index page renders ~46 KB from the LMDB,
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# and this pool is a spinning-disk mirror shared with a syncing monerod: a COLD
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# request measured 68 SECONDS, while the two immediately after it took 0.87s and
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# 0.012s. A short timeout here does not detect a slow explorer, it manufactures
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# a false DOWN every time the page cache has gone cold between runs.
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body=$(curl -s --max-time 90 -w '\n%{http_code}' "${URL}/" 2>/dev/null)
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code=$(printf '%s' "$body" | tail -1)
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if [ -z "$code" ] || [ "$code" = "000" ]; then
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report "down" "xmrblocks not responding"
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exit 1
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fi
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if [ "$code" != "200" ]; then
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report "down" "xmrblocks HTTP ${code}"
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exit 1
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fi
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# A 200 that is not the explorer is still a failure. The index page always
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# carries the project name in its title.
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if ! printf '%s' "$body" | grep -qi "monero"; then
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report "down" "xmrblocks served 200 but not an explorer page (templates missing?)"
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exit 1
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fi
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report "up" "OK"
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exit 0
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