fix for mode pvc and a couple message improvements

README.md

@@ -6,6 +6,7 @@ Nagios-style checks against Kubernetes API. Designed for usage with Nagios, Icin
 
  * jq
  * openssl
+ * bc (for mode pvc)
 
 ## Script usage
 
@@ -125,7 +126,7 @@ All the needed objects (ServiceAccount, ClusterRole, RoleBinding) can be created
 
     kubectl apply -f https://raw.githubusercontent.com/agapoff/check_kubernetes/master/account.yaml
 
-You may also prefer to revise and tighten the RBAC role if you're not going to use all modes. For example you may get rid of secrets permission if you have no need to check the TLS certs.
+For mode pvc or tls you need to enable the permissions in the yaml first. Those two can have security implications and are thus disabled by default.
 
 Then in order to get the token just issue this command:
 

account.yaml

@@ -23,7 +23,10 @@ rules:
     resources:
       - pods
       - nodes
-      - secrets
+# required for mode pvc
+#      - nodes/proxy
+# required for mode tls
+#      - secrets
       - persistentvolumes
     verbs:
       - get

check_kubernetes.sh

@@ -164,15 +164,15 @@ mode_nodes() {
                                        .status")"
         if [ "$ready" != True ]; then
             EXITCODE=2
-            OUTPUT="${OUTPUT}Node $node not ready. "
+            OUTPUT="ERROR. ${OUTPUT}Node $node not ready\n"
         fi
         for condition in OutOfDisk MemoryPressure DiskPressure; do
             state="$(echo "$data" | jq -r ".items[] | select(.metadata.name==\"$node\") | \
                                            .status.conditions[] | select(.type==\"$condition\") | \
                                            .status")"
             if [ "$state" = True ]; then
                 [ $EXITCODE -lt 1 ] && EXITCODE=1
-                OUTPUT="${OUTPUT} $node $condition. "
+                OUTPUT="WARN. ${OUTPUT} $node $condition\n"
             fi
         done
     done
@@ -253,23 +253,19 @@ mode_pvc() {
                         ((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/$volume_bytes_capacity Bytes)"
+                             OUTPUT="${OUTPUT}High storage utilization on pvc $volume_name (namespace:$volumes_namespace): $volume_bytes_utilization% ($volume_bytes_used/$volume_bytes_capacity Bytes)\n"
                             ((WARN_ERROR++))
                         fi
                         if [ "$volume_bytes_utilization" -gt "$CRIT" ]; then
-                            echo "CRITICAL. Very high storage utilization on pvc $volume_name: \
-                                $volume_bytes_utilization% ($volume_bytes_used/$volume_bytes_capacity Bytes)"
+                             OUTPUT="${OUTPUT}Very high storage utilization on pvc $volume_name: $volume_bytes_utilization% ($volume_bytes_used/$volume_bytes_capacity Bytes)\n"
                             ((CRIT_ERROR++))
                         fi
                         if [ "$volume_inodes_utilization" -gt "$WARN" ] && [ "$volume_inodes_utilization" -lt "$CRIT" ]; then
-                            echo "WARNING. High inodes utilization on pvc $volume_name: \
-                                $volume_inodes_utilization% ($volume_inodes_used/$volume_inodes_capacity)"
+                             OUTPUT="${OUTPUT}High inodes utilization on pvc $volume_name: $volume_inodes_utilization% ($volume_inodes_used/$volume_inodes_capacity)\n"
                             ((WARN_ERROR++))
                         fi
                         if [ "$volume_inodes_utilization" -gt "$CRIT" ]; then
-                            echo "CRITICAL. Very high inodes utilization on pvc $volume_name: \
-                                $volume_inodes_utilization% ($volume_inodes_used/$volume_inodes_capacity)"
+                             OUTPUT="${OUTPUT}Very high inodes utilization on pvc $volume_name: $volume_inodes_utilization% ($volume_inodes_used/$volume_inodes_capacity)\n"
                             ((CRIT_ERROR++))
                         fi
                     done
@@ -279,12 +275,15 @@ mode_pvc() {
     done
 
     if [ "$WARN_ERROR" -eq "0" ] && [ "$CRIT_ERROR" -eq "0" ]; then
-        echo "OK. No problem on $PVC_COUNT pvc storage"
+        echo "OK. No problems on $PVC_COUNT pvc"
     elif [ "$WARN_ERROR" -ne "0" ] && [ "$CRIT_ERROR" -eq "0" ]; then
+        echo "WARNING.\n${OUTPUT}"
         exit 1
     elif [ "$CRIT_ERROR" -ne "0" ]; then
+        echo "CRITICAL.\n${OUTPUT}"
         exit 2
     else
+        echo "ERROR.\n${OUTPUT}"
         exit 3
     fi
 }