Automatically set or not set resource quota through the cluster (#59)

Set resource if or not depend on k8s quota

Author: pycgo

kubectl-node_shell

@@ -140,6 +140,13 @@ else
   fi
 fi
 
+# test if resource specification is required
+resources_json='"resources": {
+          "limits":   { "cpu": "'${container_cpu}'", "memory": "'${container_memory}'" },
+          "requests": { "cpu": "'${container_cpu}'", "memory": "'${container_memory}'" }
+        }'
+$kubectl run test --image test --dry-run=server 2>&1 | grep 'failed quota' --quiet || resources_json='"resources": {}'
+
 overrides="$(
 cat <<EOT
 {
@@ -156,10 +163,7 @@ cat <<EOT
         "stdinOnce": true,
         "tty": $tty,
         "command": $cmd,
-        "resources": {
-          "limits":   { "cpu": "${container_cpu}", "memory": "${container_memory}" },
-          "requests": { "cpu": "${container_cpu}", "memory": "${container_memory}" }
-        },
+        $resources_json,
         "volumeMounts": $volume_mounts
       }
     ],
@@ -172,7 +176,6 @@ cat <<EOT
 }
 EOT
 )"
-
 # Support Kubectl <1.18
 m=$(kubectl version --client -o yaml | awk -F'[ :"]+' '$2 == "minor" {print $3+0}')
 if [ "$m" -lt 18 ]; then