build(k8s): enable maintenance mode on k8s

Author: kikkomep

k8s/templates/backend.deployment.yaml

@@ -63,7 +63,11 @@ spec:
           image: {{ include "chart.lifemonitor.image" . }}
           imagePullPolicy: {{ .Values.lifemonitor.imagePullPolicy }}
           env:
-          {{- include "lifemonitor.common-env" . | nindent 12 }}
+          {{- include "lifemonitor.common-env" . | nindent 12 }}          
+            {{- if  .Values.maintenanceMode.enabled }}
+            - name: FLASK_ENV
+              value: "maintenance"
+            {{- end }}
           volumeMounts:
           {{- include "lifemonitor.common-volume-mounts" . | nindent 12 }}
           ports:

k8s/templates/console.deployment.yaml

@@ -0,0 +1,73 @@
+{{- if or (.Values.maintenanceMode.enabled) (.Values.console.enabled ) }}
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "chart.fullname" . }}-console
+  labels:
+    {{- include "chart.labels" . | nindent 4 }}
+spec:
+  {{- if not .Values.lifemonitor.autoscaling.enabled }}
+  replicas: {{ .Values.lifemonitor.replicaCount }}
+  {{- end }}
+  selector:
+    matchLabels:
+      {{- include "chart.selectorLabels" . | nindent 6 }}
+  template:
+    metadata:
+      annotations:
+        checksum/settings: {{ include (print $.Template.BasePath "/settings.secret.yaml") . | sha256sum }}
+      {{- with .Values.lifemonitor.podAnnotations }}
+        {{- toYaml . | nindent 8 }}
+      {{- end }}       
+      labels:
+        {{- include "chart.selectorLabels" . | nindent 8 }}
+    spec:
+      {{- with .Values.lifemonitor.imagePullSecrets }}
+      imagePullSecrets:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      serviceAccountName: {{ include "chart.serviceAccountName" . }}
+      securityContext:
+        {{- toYaml .Values.lifemonitor.podSecurityContext | nindent 8 }}
+      containers:
+        - name: app
+          securityContext:
+            {{- toYaml .Values.lifemonitor.securityContext | nindent 12 }}
+          image: {{ include "chart.lifemonitor.image" . }}
+          imagePullPolicy: {{ .Values.lifemonitor.imagePullPolicy }}
+          command: ["/bin/sh","-c"]
+          args: ["wait-for-redis.sh && wait-for-postgres.sh && sleep infinity"]
+          env:
+          {{- include "lifemonitor.common-env" . | nindent 12 }}
+            - name: LIFEMONITOR_MAINTENANCE_MODE
+              value: {{ .Values.maintenanceMode.enabled | quote }}
+            - name: LIFEMONITOR_CONSOLE_ENABLED
+              value: {{ .Values.console.enabled | quote }}
+          volumeMounts:
+          {{- include "lifemonitor.common-volume-mounts" . | nindent 12 }}
+            - name: lifemonitor-backup
+              mountPath: "/var/data/backup"
+          ports:
+            - name: http
+              containerPort: 8000
+              protocol: TCP         
+          resources:
+            {{- toYaml .Values.lifemonitor.resources | nindent 12 }}
+      volumes:
+        - name: lifemonitor-backup
+          persistentVolumeClaim:
+            claimName: {{ .Values.backup.existingClaim }}
+      {{- include "lifemonitor.common-volume" . | nindent 8 }}
+      {{- with .Values.lifemonitor.nodeSelector }}
+      nodeSelector:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.lifemonitor.affinity }}
+      affinity:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.lifemonitor.tolerations }}
+      tolerations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+{{- end }}

k8s/templates/worker.deployment.yaml

@@ -72,6 +72,10 @@ spec:
               {{ else }}
               value: {{ $queue.name }}
               {{ end }}
+            {{- if  $.Values.maintenanceMode.enabled }}
+            - name: FLASK_ENV
+              value: "maintenance"
+            {{- end }}
           ports:
             - containerPort: 9191
           volumeMounts:

k8s/templates/wss.deployment.yaml

@@ -60,6 +60,10 @@ spec:
           imagePullPolicy: {{ .Values.lifemonitor.imagePullPolicy }}
           env:
           {{- include "lifemonitor.common-env" . | nindent 12 }}
+            {{- if  .Values.maintenanceMode.enabled }}
+            - name: FLASK_ENV
+              value: "maintenance"
+            {{- end }}
           volumeMounts:
           {{- include "lifemonitor.common-volume-mounts" . | nindent 12 }}
           ports:

k8s/values.yaml

@@ -6,6 +6,9 @@
 nameOverride: ""
 fullnameOverride: ""
 
+# manage maintenance mode
+maintenanceMode:
+  enabled: false
 # The name and port number of the server (e.g.: 'lm.local:8000'),
 # used as base_url on all the links returned by the API
 externalServerName: &hostname api.lifemonitor.eu
@@ -151,6 +154,10 @@ monitoring:
           memory: 256Mi
           cpu: 0.2
 
+# management console settings
+console:
+  enabled: false
+
 rateLimiting:
   zone:
     accounts: