Allow passing pd & slack secrets via env var

In some deployments there are existing mechanism for handling secrets which would be preferred to having them in the mongo db.

This also unifies 2 code paths for configuring PagerDuty.

Testing:

• Automated tests pass
• Original flow of storing these secrets in mongo works
• Using env vars instead works (although the admin will incorrectly show an error for the slack token and I had to make any dummy edit to cause it to save the bot settings)

helmchart/pagerbot/templates/mongo-deploy.yaml

+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  labels:
+    name: {{ .Values.mongo.name }}
+  name: {{ .Values.mongo.name }}
+  namespace: {{ .Values.namespace }}
+spec:
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: {{ .Values.mongo.name }}
+    spec:
+      containers:
+      - image: "{{ .Values.mongo.image.repository }}:{{ .Values.mongo.image.tag }}"
+        name: {{ .Values.mongo.name }}
+        ports:
+        - containerPort: 27017
+        volumeMounts:
+        - mountPath: /data/db
+          name: "{{ .Values.mongo.name }}-pvc"
+      restartPolicy: Always
+      volumes:
+      - name: "{{ .Values.mongo.name }}-pvc"
+        persistentVolumeClaim:
+          claimName: "{{ .Values.mongo.name }}-pvc"

helmchart/pagerbot/templates/mongo-pvc.yaml

+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  labels:
+    app: {{ .Values.mongo.name }}
+  name: "{{ .Values.mongo.name }}-pvc"
+  namespace: {{ .Values.namespace }}
+spec:
+  accessModes:
+  - ReadWriteOnce
+  resources:
+    requests:
+      storage: 100Mi

helmchart/pagerbot/templates/mongo-svc.yaml

+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    app: {{ .Values.mongo.name }}
+  name: {{ .Values.mongo.name }}
+  namespace: {{ .Values.namespace }}
+spec:
+  ports:
+  - name: "27017"
+    port: 27017
+    targetPort: 27017
+  selector:
+    app: {{ .Values.mongo.name }}
\ No newline at end of file

helmchart/pagerbot/templates/pagerbot-admin-deploy.yaml

+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  labels:
+    app: {{ .Values.pagerbotAdmin.name }}
+  name: {{ .Values.pagerbotAdmin.name }}
+  namespace: {{ .Values.namespace }}
+spec:
+  replicas: {{ .Values.pagerbotAdmin.replicas }}
+  strategy:
+    type: Recreate
+  template:
+    metadata:
+      labels:
+        app: {{ .Values.pagerbotAdmin.name }}
+    spec:
+      containers:
+      - args:
+        - ruby
+        - lib/pagerbot.rb
+        - admin
+        image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
+        name: {{ .Values.pagerbotAdmin.name }}
+        ports:
+        - containerPort: 4567
+        env:
+          - name: LOG_LEVEL
+            value: "debug"
+          - name: MONGODB_URI
+            value: "mongodb://mongo:27017/pagerbot"
+      restartPolicy: Always

helmchart/pagerbot/templates/pagerbot-deploy.yaml

+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  labels:
+    app: {{ .Values.pagerbot.name }}
+  name: {{ .Values.pagerbot.name }}
+  namespace: {{ .Values.namespace }}
+spec:
+  replicas: 1
+  strategy:
+    type: Recreate
+  template:
+    metadata:
+      labels:
+        app: {{ .Values.pagerbot.name }}
+    spec:
+      containers:
+      - args:
+        - ruby
+        - lib/pagerbot.rb
+        image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
+        name: {{ .Values.pagerbot.name }}
+        env:
+          - name: LOG_LEVEL
+            value: "debug"
+          - name: MONGODB_URI
+            value: "mongodb://mongo:27017/pagerbot"
+      restartPolicy: Always
+