Add 'kubeconfig_file' param into the out params

README.md

@@ -55,6 +55,7 @@ Control the Kubernetes cluster like `kubectl apply`, `kubectl delete`, `kubectl
 - `wait_until_ready`: *Optional.* The number of seconds that waits until all pods are ready. 0 means don't wait. Defaults to `30`.
 - `wait_until_ready_interval`: *Optional.* The interval (sec) on which to check whether all pods are ready. Defaults to `3`.
 - `wait_until_ready_selector`: *Optional.* [A label selector](https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/#label-selectors) to identify a set of pods which to check whether those are ready. Defaults to every pods in the namespace.
+- `kubeconfig_file`: *Optional.* The path of kubeconfig file. This param has priority over the `kubeconfig` of source configuration.
 
 ## Example
 
@@ -104,6 +105,40 @@ jobs:
       wait_until_ready_selector: run=nginx
 ```
 
+### Use a remote kubeconfig file fetched by s3-resource
+
+```yaml
+resources:
+- name: k8s-prod
+  type: kubernetes
+
+- name: kubeconfig-file
+  type: s3
+  source:
+    bucket: mybucket
+    versioned_file: config
+    access_key_id: ((s3-access-key))
+    secret_access_key: ((s3-secret))
+
+- name: my-app
+  type: git
+  source:
+    ...
+
+jobs:
+- name: k8s-deploy-prod
+  plan:
+  - aggregate:
+    - get: my-app
+      trigger: true
+    - get: kubeconfig-file
+  - put: k8s-prod
+    params:
+      kubectl: apply -f my-app/k8s -f my-app/k8s/production
+      wait_until_ready_selector: app=myapp
+      kubeconfig_file: kubeconfig-file/config
+```
+
 ## License
 
 This software is released under the MIT License.

assets/common.sh

@@ -12,16 +12,20 @@ setup_kubectl() {
 
   export KUBECONFIG=$(mktemp $TMPDIR/kubernetes-resource-kubeconfig.XXXXXX)
 
-  # Optional. A kubeconfig file.
+  # Optional. The path of kubeconfig file
+  local kubeconfig_file="$(jq -r '.params.kubeconfig_file // ""' < $payload)"
+  # Optional. The content of kubeconfig
   local kubeconfig="$(jq -r '.source.kubeconfig // ""' < $payload)"
-  if [[ -n "$kubeconfig" ]]; then
-    echo "$kubeconfig" > $KUBECONFIG
 
-    # Optional. The name of the kubeconfig context to use.
-    local context="$(jq -r '.source.context // ""' < $payload)"
-    if [[ -n "$context" ]]; then
-      exe kubectl config use-context $context
+  if [[ -n "$kubeconfig_file"  ]]; then
+    if [[ ! -f "$kubeconfig_file" ]]; then
+      echoerr "kubeconfig file '$kubeconfig_file' does not exist"
+      exit 1
     fi
+
+    cat "$kubeconfig_file" > $KUBECONFIG
+  elif [[ -n "$kubeconfig" ]]; then
+    echo "$kubeconfig" > $KUBECONFIG
   else
     # Optional. The address and port of the API server. Requires token.
     local server="$(jq -r '.source.server // ""' < $payload)"
@@ -73,6 +77,12 @@ setup_kubectl() {
     exe kubectl config use-context $CONTEXT_NAME
   fi
 
+  # Optional. The name of the kubeconfig context to use.
+  local context="$(jq -r '.source.context // ""' < $payload)"
+  if [[ -n "$context" ]]; then
+    exe kubectl config use-context $context
+  fi
+
   # Print information
   exe kubectl version
   exe kubectl cluster-info