add hostNetwork value to injector deployment (#471)

* add hostNetwork value to injector deployment

* adding unit tests

templates/injector-deployment.yaml

@@ -36,6 +36,7 @@ spec:
       {{- end }}
       serviceAccountName: "{{ template "vault.fullname" . }}-agent-injector"
       {{- if not .Values.global.openshift }}
+      hostNetwork: {{ .Values.injector.hostNetwork }}
       securityContext:
         runAsNonRoot: true
         runAsGroup: {{ .Values.injector.gid | default 1000 }}

test/unit/injector-deployment.bats

@@ -543,3 +543,25 @@ load _helpers
       yq -r '.spec.template.metadata.labels.foo' | tee /dev/stderr)
   [ "${actual}" = "bar" ]
 }
+
+#--------------------------------------------------------------------
+# hostNetwork
+
+@test "injector/deployment: injector.hostNetwork not set" {
+  cd `chart_dir`
+  local actual=$(helm template \
+      --show-only templates/injector-deployment.yaml \
+      . | tee /dev/stderr |
+      yq -r '.spec.template.spec.hostNetwork' | tee /dev/stderr)
+  [ "${actual}" = "false" ]
+}
+
+@test "injector/deployment: injector.hostNetwork is set" {
+  cd `chart_dir`
+  local actual=$(helm template \
+      --show-only templates/injector-deployment.yaml \
+      --set 'injector.hostNetwork=true' \
+      . | tee /dev/stderr |
+      yq -r '.spec.template.spec.hostNetwork' | tee /dev/stderr)
+  [ "${actual}" = "true" ]
+}

values.yaml

@@ -168,6 +168,10 @@ injector:
   # This should be a YAML map of the labels to apply to the injector
   extraLabels: {}
 
+  # Should the injector pods run on the host network (useful when using
+  # an alternate CNI in EKS)
+  hostNetwork: false
+
   # Injector service specific config
   service:
     # Extra annotations to attach to the injector service