Fix context issue during cleanup of kind clusters

Signed-off-by: Pulkit Jain <[email protected]>

ci/kind/kind-setup.sh

@@ -528,19 +528,26 @@ function destroy_external_servers {
 
 function clean_kind {
     echo "=== Cleaning up stale kind clusters ==="
-    read -a all_kind_clusters <<< $(kind get clusters)
-    for kind_cluster_name in "${all_kind_clusters[@]}"; do
-        creationTimestamp=$(kubectl get nodes --context kind-$kind_cluster_name -o json -l node-role.kubernetes.io/control-plane | \
-        jq -r '.items[0].metadata.creationTimestamp')
-        creation=$(printUnixTimestamp "$creationTimestamp")
-        now=$(date -u '+%s')
-        diff=$((now-creation))
-        timeout=$(($UNTIL_TIME_IN_MINS*60))
-        if [[ $diff -gt $timeout ]]; then
-           echo "=== kind ${kind_cluster_name} present from more than $UNTIL_TIME_IN_MINS minutes ==="
-           kind delete cluster --name $kind_cluster_name
-        fi
+    LOCK_FILE="$THIS_DIR/.kube/config.lock"
+    exec 200>"$LOCK_FILE"
+    flock 200
+    for context in $(kubectl config get-contexts -o name | grep 'kind-'); do
+      cluster_name=$(echo $context | sed 's/^kind-//')
+      creationTimestamp=$(kubectl get nodes --context $context -o json -l node-role.kubernetes.io/control-plane | \
+      jq -r '.items[0].metadata.creationTimestamp' || true)
+      if [[ -z $creationTimestamp ]]; then
+        continue
+      fi
+      creation=$(printUnixTimestamp "$creationTimestamp")
+      now=$(date -u '+%s')
+      diff=$((now-creation))
+      timeout=$(($UNTIL_TIME_IN_MINS*60))
+      if [[ $diff -gt $timeout ]]; then
+        echo "=== Cluster ${cluster_name} is present for more than $UNTIL_TIME_IN_MINS minutes ==="
+        kind delete cluster --name $cluster_name
+      fi
     done
+    flock -u 200
 }
 
 if ! command -v kind &> /dev/null