tegwick
caf3912d1b
The first lease watch returned FAILED on one sample of 21. That sample was the instrument: it treated an empty kubectl result as not-ready, so a transient API hiccup was recorded as an outage. The service returned zero 503s across the window, with a readiness probe every 5s and 46 minutes of uptime past a 30-minute lease. Not overriding the verdict by argument — a verdict that can be talked around is worth nothing. The watcher now distinguishes a failed query from a failed service and corroborates against the kubelet's probe history, which samples far more often than once a minute. Promoted from scratch into tools/ so it is reviewable and re-runnable. Three checks in this rollout were defective in the same way: live-image-digest-match degrading to 'not pinned' while a digest was pinned, check_readiness reporting 'database unreachable' for a reachable but unmigrated database, and this watcher. A verification step that cannot fail correctly is worse than none, because it is trusted. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Bjefh8NUiEiahN4JLwoSKM Assistant: claude-code Assistant-Model: opus Assistant-Process: 388925@bnt-lap001 Assistant-Session: 3507023f-e0fd-4a1e-9d90-a0d4217d1502
46 lines
2.2 KiB
Bash
Executable file
46 lines
2.2 KiB
Bash
Executable file
#!/usr/bin/env bash
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# Verification for RCP-WP-0002-T04: stay ready across a credential lease
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# rotation (runtime lease TTL 30m).
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#
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# v2. The first version treated an empty kubectl result as "not ready", so a
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# transient API hiccup was recorded as a service failure and produced a FAILED
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# verdict for a service that never returned a single 503. A check that cannot
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# tell its own failure from the failure it watches for is worse than no check.
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OUT="$1"; MINUTES="${2:-20}"
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DEADLINE=$(( $(date +%s) + MINUTES * 60 ))
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: > "$OUT"
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echo "started $(date -Is) — ${MINUTES}m watch (runtime lease TTL 30m)" >> "$OUT"
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NOTREADY=0; QUERYFAIL=0; SAMPLES=0
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while [ "$(date +%s)" -lt "$DEADLINE" ]; do
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SAMPLES=$((SAMPLES+1))
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if ! OUTJSON=$(kubectl -n canned-prompts get deploy canned-prompts \
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-o jsonpath='{.status.readyReplicas}|{.status.replicas}' 2>/dev/null) || [ -z "${OUTJSON%%|*}${OUTJSON##*|}" ]; then
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QUERYFAIL=$((QUERYFAIL+1))
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echo "$(date -Is) QUERY-FAILED (instrument, not service)" >> "$OUT"
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else
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READY="${OUTJSON%%|*}"; WANT="${OUTJSON##*|}"
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if [ "$READY" = "$WANT" ] && [ -n "$READY" ]; then
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echo "$(date -Is) ready=$READY/$WANT" >> "$OUT"
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else
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NOTREADY=$((NOTREADY+1))
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echo "$(date -Is) NOT READY ready=${READY:-0}/${WANT:-?}" >> "$OUT"
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fi
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fi
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sleep 60
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done
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# Corroborate with the kubelet, which probes every 5s and is a far better
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# instrument than this loop's 1/min sampling.
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P503=$(kubectl -n canned-prompts logs deploy/canned-prompts --since="${MINUTES}m" 2>/dev/null | grep -c '" 503' || echo "?")
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UP=$(kubectl -n canned-prompts get pod -l app.kubernetes.io/name=canned-prompts -o jsonpath='{.items[0].status.startTime}' 2>/dev/null)
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R=$(kubectl -n canned-prompts get pod -l app.kubernetes.io/name=canned-prompts -o jsonpath='{.items[0].status.containerStatuses[0].restartCount}' 2>/dev/null)
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{
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echo "finished $(date -Is)"
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echo "samples=$SAMPLES not_ready=$NOTREADY query_failed=$QUERYFAIL"
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echo "kubelet readiness 503s in window: $P503 (probe every 5s)"
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echo "pod started $UP, restarts=$R"
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if [ "$NOTREADY" -eq 0 ] && [ "$P503" = "0" ]; then
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echo "RESULT: survived — continuously ready past the lease TTL"
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else
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echo "RESULT: FAILED"
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fi
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} >> "$OUT"
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