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Ludovic Cartier
49 lines
1.6 KiB
Bash
Executable File
49 lines
1.6 KiB
Bash
Executable File
#!/usr/bin/env bash
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# check_k8s_pod_restarts
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# Vérifie s'il y a eu des redémarrages de pods (événements "Killing") dans les X dernières minutes.
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# Retour: 0=OK, 2=CRITICAL, 3=UNKNOWN
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#
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# Usage:
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# sudo /usr/lib/nagios/plugins/check_k8s_pod_restarts [minutes]
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#
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MINUTES=${1:-5}
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# Require kubectl
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if ! command -v kubectl >/dev/null 2>&1; then
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echo "UNKNOWN - kubectl not found"
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exit 3
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fi
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# cutoff en epoch (GNU date)
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if ! cutoff=$(date -d "$MINUTES minutes ago" +%s 2>/dev/null); then
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echo "UNKNOWN - date parsing failed (on macOS use gdate from coreutils)"
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exit 3
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fi
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matches=()
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while IFS=$'\t' read -r ns pod last msg; do
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# skip empty lines
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[[ -z "$last" ]] && continue
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# convert last timestamp to epoch (works with GNU date; handles timezone/fractions)
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if ! ts=$(date -d "$last" +%s 2>/dev/null); then
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# if parsing fails, skip the event
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continue
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fi
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if (( ts >= cutoff )); then
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# safe message truncation
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shortmsg=$(echo "$msg" | tr '\n' ' ' | cut -c1-300)
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matches+=("$ns\t$pod\t$last\t$shortmsg")
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fi
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done < <(kubectl get events --all-namespaces --field-selector reason=Killing -o custom-columns='NAMESPACE:.metadata.namespace,NAME:.involvedObject.name,LAST:.lastTimestamp,MESSAGE:.message' --no-headers 2>/dev/null || true)
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if [[ ${#matches[@]} -eq 0 ]]; then
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echo "OK - no pod restarts in the last ${MINUTES} minutes"
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exit 0
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else
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echo "CRITICAL - ${#matches[@]} pod restarts in the last ${MINUTES} minutes:"
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for m in "${matches[@]}"; do
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IFS=$'\t' read -r ns pod last shortmsg <<< "$m"
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echo " - ${ns}/${pod} at ${last} : ${shortmsg}"
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done
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exit 2
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fi |