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Merged
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Nov 4, 2021
Merged

Improvements of pvc and minor fixes #23

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8 changes: 7 additions & 1 deletion README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -54,7 +54,7 @@ Nagios-style checks against Kubernetes API. Designed for usage with Nagios, Icin
Check apiserver health using tokenfile:

./check_kubernetes.sh -m apiserver -H https://<...>:6443 -t /path/to/tokenfile
OK. Kuberenetes apiserver health is OK
OK. Kubernetes apiserver health is OK

Check whether all deployments are available using token:

Expand Down Expand Up @@ -106,6 +106,12 @@ Checked failed jobs named 'good':
./check_kubernetes.sh -m jobs -n good
OK: 0 failed jobs is below threshold

Check utilization if pvc (if consumes more than %):

./check_kubernetes.sh -m pvc
CRITICAL. Very high storage utilization on pvc prometheus-data: 93% (86106636288/157459890176 Bytes)


## Brief mode

All modes support the -b brief option. In this mode, a single numerical output is returned. The number is positive on success and zero or negative on error.
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8 changes: 6 additions & 2 deletions check_kubernetes.sh
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Expand Up @@ -266,6 +266,8 @@ mode_pvc() {
CRIT=${CRIT:-90}
WARN_ERROR=0
CRIT_ERROR=0
PVC_COUNT=0

data="$(getJSON "get nodes" "api/v1/nodes")"
[ $? -gt 0 ] && die "$data"
nodes=($(echo "$data" | jq -r ".items[].metadata.name"))
Expand All @@ -274,7 +276,6 @@ mode_pvc() {
data="$(getJSON "get nodes" "api/v1/nodes/$node/proxy/stats/summary")"
[ $? -gt 0 ] && die "$data"
pods=($(echo "$data" | jq -r ".pods[].podRef.name"))

for pod in "${pods[@]}"; do
pod_volumes="$(echo "$data" | jq -r ".pods[] | select(.podRef.name==\"$pod\") | .volume" 2>/dev/null)"
[ "$pod_volumes" == "null" ] && continue
Expand All @@ -292,6 +293,9 @@ mode_pvc() {
volume_inodes_capacity=$(echo "$pvc_volumes" | jq -r ". | select(.name==\"$volume_name\") | .inodes")
volume_bytes_utilization=$(echo "100 * $volume_bytes_used / $volume_bytes_capacity" | bc)
volume_inodes_utilization=$(echo "100 * $volume_inodes_used / $volume_inodes_capacity" | bc)

((PVC_COUNT++))

if [ "$volume_bytes_utilization" -gt "$WARN" ] && [ "$volume_bytes_utilization" -lt "$CRIT" ]; then
echo "WARNING. High storage utilization on pvc $volume_name (namespace:$volumes_namespace): \
$volume_bytes_utilization% ($volume_bytes_used/$volume_bytes_capacity Bytes)"
Expand Down Expand Up @@ -319,7 +323,7 @@ mode_pvc() {
done

if [ "$WARN_ERROR" -eq "0" ] && [ "$CRIT_ERROR" -eq "0" ]; then
echo "OK. No problem on pvc storage"
echo "OK. No problem on $pvc_count pvc storage"
elif [ "$WARN_ERROR" -ne "0" ] && [ "$CRIT_ERROR" -eq "0" ]; then
exit 1
elif [ "$CRIT_ERROR" -ne "0" ]; then
Expand Down