kubernetes: libreoffice-online helm chart improvements

* switch monitoring path to REST endpoint for admin metrics
 * update service type to ClusterIP from NodePort
 * adding environment variables for deployment customization
 * switch /tmp folder mapping from memory to disk

Change-Id: I78dab256343c20bf84060bb4fbae203d4769be35
Reviewed-on: https://gerrit.libreoffice.org/85217
Reviewed-by: Michael Meeks <michael.meeks@collabora.com>
Tested-by: Michael Meeks <michael.meeks@collabora.com>

kubernetes/helm/README.md

@@ -1,11 +1,20 @@
-# OnlineOffice Helm-Charts
+# LibreOffice Online Helm Chart
 
-# Available Charts
+Chart for deploying LibreOffice Online in Kubernetes cluster.</br>
+
+How to test:
+  1. Install Kubernetes cluster locally - minikube - https://minikube.sigs.k8s.io/docs/start/linux/
+  2. Install helm - needed version >= 3.0.0 - https://helm.sh/docs/intro/install/
+  3. Update libreoffice-online/values.yaml with your required settings for environmentVariablesLool 
+  username/password/domain settings
+  4. Install helm-chart using below command
 
-## LibreOffice-Online
-Chart for deploying C++ application [LibreOffice Online] in Kubernetes cluster.</br>
-To install the chart a command similar to the one above needs to be issued.</br>
 ```
-.. cd helm-charts
 helm install --namespace=${your desired namespace} --generate-name libreoffice-online
 ```
+
+Access LibreOffice Online locally through service ClusterIP and port 9980.
+
+```
+kubectl -n ${your desired namespace} describe service libreoffice-online
+```

kubernetes/helm/libreoffice-online/templates/deployment.yaml

@@ -27,7 +27,6 @@ spec:
         app: {{ template "name" . }}
         release: {{ .Release.Name }}
         version: "{{ .Values.global.app.version }}"
-        exposed: "true"
       annotations:
       {{- if .Values.global.app.monitoring.activate }}
         prometheus.io/scrape: "true"
@@ -43,9 +42,6 @@ spec:
             - containerPort: {{ .Values.global.app.service.internalPort }}
           securityContext:
             readOnlyRootFilesystem: false
-            runAsNonRoot: true
-            #Lool user id
-            runAsUser: 101
         {{- if .Values.probes.liveness.activate }}
           livenessProbe:
             httpGet:
@@ -85,5 +81,4 @@ spec:
     {{- end }}
       volumes:
         - name: tmp
-          emptyDir:
-            medium: "Memory"
+          emptyDir: {}

kubernetes/helm/libreoffice-online/templates/service.yaml

@@ -8,7 +8,6 @@ metadata:
     release: {{ .Release.Name }}
 spec:
   type: {{ .Values.global.app.service.type }}
-  externalTrafficPolicy: Local
   ports:
     - port: {{ .Values.global.app.service.externalPort }}
       targetPort: {{ .Values.global.app.service.internalPort }}

kubernetes/helm/libreoffice-online/values.yaml

@@ -4,6 +4,7 @@
 global:
   app:
     name: libreoffice-online
+    version: 6.5.0
     urlScheme: HTTP # either HTTP or HTTPS
     scaling:
       enabled: true
@@ -11,14 +12,14 @@ global:
       max: 10
       target:
         cpu: 70
-        memory: 70        
+        memory: 70
     monitoring:
       activate: false
       port: 9980
-      path: "/lool/adminMonitorInfo"
+      path: "/lool/getMetrics"
     service:
       name: libreoffice-online
-      type: NodePort
+      type: ClusterIP
       externalPort: 9980
       internalPort: 9980
   ingress: {}
@@ -35,7 +36,7 @@ probes:
   readiness:
     activate: true
     path: /
-    initialDelaySeconds: 60
+    initialDelaySeconds: 180
     periodSeconds: 10
     timeoutSeconds: 30
     successThreshold: 1
@@ -43,7 +44,7 @@ probes:
   liveness:
     activate: true
     path: /
-    initialDelaySeconds: 60
+    initialDelaySeconds: 180
     periodSeconds: 10
     timeoutSeconds: 30
     successThreshold: 1
@@ -53,10 +54,18 @@ deployment:
   name: libreoffice-online
   type: RollingUpdate
   minReadySeconds: 0
-  maxUnavailable: 1
+  maxUnavailable: 0
   maxSurge: 1
 
-environmentVariablesLool: {}
+environmentVariablesLool: 
+  - name: extra_params
+    value: --o:ssl.enable=false
+  - name: username
+    value: 
+  - name: password
+    value: 
+  - name: domain
+    value: 
 
 service:
   name: libreoffice-online