Add check for $RULE_INDEX validity

Signed-off-by: Tim Serong <[email protected]>

Author: tserong

docs/upgrade/v1-4-1-to-v1-4-3.md

@@ -124,9 +124,11 @@ To resolve this issue, perform the following steps:
      validatingwebhookconfiguration longhorn-webhook-validator -o json \
      | jq '.webhooks[0].rules | map(.resources[0] == "persistentvolumeclaims") | index(true)')
 
-   kubectl patch validatingwebhookconfiguration longhorn-webhook-validator \
-     --type='json' \
-     -p="[{'op': 'remove', 'path': '/webhooks/0/rules/$RULE_INDEX'}]"
+   if [ -n "$RULE_INDEX" -a "$RULE_INDEX" != "null" ]; then
+     kubectl patch validatingwebhookconfiguration longhorn-webhook-validator \
+       --type='json' \
+       -p="[{'op': 'remove', 'path': '/webhooks/0/rules/$RULE_INDEX'}]"
+   fi
    ```
 
 1. Wait for the related PVC to be deleted.

docs/volume/create-volume.md

@@ -42,9 +42,11 @@ To resolve this issue, perform the following steps:
      validatingwebhookconfiguration longhorn-webhook-validator -o json \
      | jq '.webhooks[0].rules | map(.resources[0] == "persistentvolumeclaims") | index(true)')
 
-   kubectl patch validatingwebhookconfiguration longhorn-webhook-validator \
-     --type='json' \
-     -p="[{'op': 'remove', 'path': '/webhooks/0/rules/$RULE_INDEX'}]"
+   if [ -n "$RULE_INDEX" -a "$RULE_INDEX" != "null" ]; then
+     kubectl patch validatingwebhookconfiguration longhorn-webhook-validator \
+       --type='json' \
+       -p="[{'op': 'remove', 'path': '/webhooks/0/rules/$RULE_INDEX'}]"
+   fi
    ```
 
 1. Wait for the related PVC to be deleted.

versioned_docs/version-v1.4/volume/create-volume.md

@@ -42,9 +42,11 @@ To resolve this issue, perform the following steps:
      validatingwebhookconfiguration longhorn-webhook-validator -o json \
      | jq '.webhooks[0].rules | map(.resources[0] == "persistentvolumeclaims") | index(true)')
 
-   kubectl patch validatingwebhookconfiguration longhorn-webhook-validator \
-     --type='json' \
-     -p="[{'op': 'remove', 'path': '/webhooks/0/rules/$RULE_INDEX'}]"
+   if [ -n "$RULE_INDEX" -a "$RULE_INDEX" != "null" ]; then
+     kubectl patch validatingwebhookconfiguration longhorn-webhook-validator \
+       --type='json' \
+       -p="[{'op': 'remove', 'path': '/webhooks/0/rules/$RULE_INDEX'}]"
+   fi
    ```
 
 1. Wait for the related PVC to be deleted.

versioned_docs/version-v1.5/volume/create-volume.md

@@ -42,9 +42,11 @@ To resolve this issue, perform the following steps:
      validatingwebhookconfiguration longhorn-webhook-validator -o json \
      | jq '.webhooks[0].rules | map(.resources[0] == "persistentvolumeclaims") | index(true)')
 
-   kubectl patch validatingwebhookconfiguration longhorn-webhook-validator \
-     --type='json' \
-     -p="[{'op': 'remove', 'path': '/webhooks/0/rules/$RULE_INDEX'}]"
+   if [ -n "$RULE_INDEX" -a "$RULE_INDEX" != "null" ]; then
+     kubectl patch validatingwebhookconfiguration longhorn-webhook-validator \
+       --type='json' \
+       -p="[{'op': 'remove', 'path': '/webhooks/0/rules/$RULE_INDEX'}]"
+   fi
    ```
 
 1. Wait for the related PVC to be deleted.