feat: add AGENT_INJECT_VAULT_AUTH_PATH option to the injector (#185)

* Add related unit tests

templates/injector-deployment.yaml

@@ -45,6 +45,8 @@ spec:
             {{- else }}
               value: {{ include "vault.scheme" . }}://{{ template "vault.fullname" . }}.{{ .Release.Namespace }}.svc:{{ .Values.server.service.port }}
             {{- end }}
+            - name: AGENT_INJECT_VAULT_AUTH_PATH
+              value: {{ .Values.injector.authPath }}
             - name: AGENT_INJECT_VAULT_IMAGE
               value: "{{ .Values.injector.agentImage.repository }}:{{ .Values.injector.agentImage.tag }}"
             {{- if .Values.injector.certs.secretName }}

test/unit/injector-deployment.bats

@@ -117,19 +117,19 @@ load _helpers
       yq -r '.spec.template.spec.containers[0].env' | tee /dev/stderr)
 
   local actual=$(echo $object |
-     yq -r '.[4].name' | tee /dev/stderr)
+     yq -r '.[5].name' | tee /dev/stderr)
   [ "${actual}" = "AGENT_INJECT_TLS_CERT_FILE" ]
 
   local actual=$(echo $object |
-      yq -r '.[4].value' | tee /dev/stderr)
+      yq -r '.[5].value' | tee /dev/stderr)
   [ "${actual}" = "/etc/webhook/certs/test.crt" ]
 
   local actual=$(echo $object |
-      yq -r '.[5].name' | tee /dev/stderr)
+      yq -r '.[6].name' | tee /dev/stderr)
   [ "${actual}" = "AGENT_INJECT_TLS_KEY_FILE" ]
 
   local actual=$(echo $object |
-      yq -r '.[5].value' | tee /dev/stderr)
+      yq -r '.[6].value' | tee /dev/stderr)
   [ "${actual}" = "/etc/webhook/certs/test.key" ]
 }
 
@@ -147,11 +147,11 @@ load _helpers
       yq -r '.spec.template.spec.containers[0].env' | tee /dev/stderr)
 
   local actual=$(echo $object |
-     yq -r '.[4].name' | tee /dev/stderr)
+     yq -r '.[5].name' | tee /dev/stderr)
   [ "${actual}" = "AGENT_INJECT_TLS_AUTO" ]
 
   local actual=$(echo $object |
-      yq -r '.[5].name' | tee /dev/stderr)
+      yq -r '.[6].name' | tee /dev/stderr)
   [ "${actual}" = "AGENT_INJECT_TLS_AUTO_HOSTS" ]
 }
 
@@ -189,3 +189,36 @@ load _helpers
       yq -r '.[2].value' | tee /dev/stderr)
   [ "${actual}" = "http://not-external-test-vault.default.svc:8200" ]
 }
+
+@test "injector/deployment: default authPath" {
+  cd `chart_dir`
+  local object=$(helm template \
+      --show-only templates/injector-deployment.yaml  \
+      . | tee /dev/stderr |
+      yq -r '.spec.template.spec.containers[0].env' | tee /dev/stderr)
+
+  local actual=$(echo $object |
+     yq -r '.[3].name' | tee /dev/stderr)
+  [ "${actual}" = "AGENT_INJECT_VAULT_AUTH_PATH" ]
+
+  local actual=$(echo $object |
+      yq -r '.[3].value' | tee /dev/stderr)
+  [ "${actual}" = "auth/kubernetes" ]
+}
+
+@test "injector/deployment: custom authPath" {
+  cd `chart_dir`
+  local object=$(helm template \
+      --show-only templates/injector-deployment.yaml  \
+      --set 'injector.authPath=auth/k8s' \
+      . | tee /dev/stderr |
+      yq -r '.spec.template.spec.containers[0].env' | tee /dev/stderr)
+
+  local actual=$(echo $object |
+     yq -r '.[3].name' | tee /dev/stderr)
+  [ "${actual}" = "AGENT_INJECT_VAULT_AUTH_PATH" ]
+
+  local actual=$(echo $object |
+      yq -r '.[3].value' | tee /dev/stderr)
+  [ "${actual}" = "auth/k8s" ]
+}

values.yaml

@@ -32,6 +32,9 @@ injector:
     repository: "vault"
     tag: "1.3.2"
 
+  # Mount Path of the Vault Kubernetes Auth Method.
+  authPath: "auth/kubernetes"
+
   # namespaceSelector is the selector for restricting the webhook to only
   # specific namespaces. This should be set to a multiline string.
   # See https://kubernetes.io/docs/reference/access-authn-authz/extensible-admission-controllers/#matching-requests-namespaceselector
@@ -124,7 +127,7 @@ server:
   # shareProcessNamespace enables process namespace sharing between Vault and the extraContainers
   # This is useful if Vault must be signaled, e.g. to send a SIGHUP for log rotation
   shareProcessNamespace: false
-  
+
   # extraArgs is a string containing additional Vault server arguments.
   extraArgs: ""