Adds the ability to have a pull secrets for Promtail. (grafana#2141)

* Adds the ability to have a pull secrets for Promtail.

Fixes grafana#2118

Signed-off-by: Cyril Tovena <cyril.tovena@gmail.com>

* bump chart version

Signed-off-by: Cyril Tovena <cyril.tovena@gmail.com>

production/helm/loki-stack/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: "v1"
 name: loki-stack
-version: 0.37.2
+version: 0.37.3
 appVersion: v1.5.0
 kubeVersion: "^1.10.0-0"
 description: "Loki: like Prometheus, but for logs."

production/helm/promtail/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: "v1"
 name: promtail
-version: 0.23.0
+version: 0.23.1
 appVersion: v1.5.0
 kubeVersion: "^1.10.0-0"
 description: "Responsible for gathering logs and sending them to Loki"

production/helm/promtail/templates/daemonset.yaml

@@ -24,7 +24,7 @@ spec:
         release: {{ .Release.Name }}
         {{- with .Values.podLabels }}
         {{- toYaml . | nindent 8 }}
-        {{- end }}          
+        {{- end }}
       annotations:
         checksum/config: {{ include (print $.Template.BasePath "/configmap.yaml") . | sha256sum }}
         {{- with .Values.podAnnotations }}
@@ -46,6 +46,12 @@ spec:
         securityContext:
           privileged: true
     {{- end }}
+      {{- if .Values.image.pullSecrets }}
+      imagePullSecrets:
+      {{- range .Values.image.pullSecrets }}
+        - name: {{ . }}
+      {{- end}}
+      {{- end }}
       containers:
         - name: promtail
           image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"

production/helm/promtail/values.yaml

@@ -19,6 +19,12 @@ image:
   repository: grafana/promtail
   tag: 1.5.0
   pullPolicy: IfNotPresent
+  ## Optionally specify an array of imagePullSecrets.
+  ## Secrets must be manually created in the namespace.
+  ## ref: https://kubernetes.io/docs/tasks/configure-pod-container/pull-image-private-registry/
+  ##
+  # pullSecrets:
+  #   - myRegistryKeySecretName
 
 livenessProbe: {}