Implement kubernetes auth / Add customizable auth path (#218)

* Implement kubernetes auth / Add customizable auth path

* Fix typo

* Apply suggestions from code review

Co-authored-by: Jason O'Donnell <2160810+jasonodonnell@users.noreply.github.com>

Co-authored-by: Jason O'Donnell <2160810+jasonodonnell@users.noreply.github.com>

action.yml

@@ -14,6 +14,12 @@ inputs:
     description: 'The method to use to authenticate with Vault.'
     default: 'token'
     required: false
+  role:
+    description: 'Vault role for specified auth method'
+    required: false
+  path:
+    description: 'Custom Vault path, if the auth method was mounted at a different path'
+    required: false
   token:
     description: 'The Vault Token to be used to authenticate with Vault'
     required: false
@@ -26,6 +32,10 @@ inputs:
   githubToken:
     description: 'The Github Token to be used to authenticate with Vault'
     required: false
+  kubernetesTokenPath:
+    description: 'The path to the Kubernetes service account secret'
+    required: false
+    default: '/var/run/secrets/kubernetes.io/serviceaccount/token'
   authPayload:
     description: 'The JSON payload to be sent to Vault when using a custom authentication method.'
     required: false
@@ -52,10 +62,7 @@ inputs:
   tlsSkipVerify:
     description: 'When set to true, disables verification of the Vault server certificate.  Setting this to true in production is not recommended.'
     required: false
-    default: "false"
-  role:
-    description: 'Vault role for specified auth method'
-    required: false
+    default: 'false'
   jwtPrivateKey:
     description: 'Base64 encoded Private key to sign JWT'
     required: false