Add liveness and readiness probe

Author: mfojtik

openshift/templates/django-postgresql.json

@@ -164,6 +164,22 @@
                     "containerPort": 8080
                   }
                 ],
+                "readinessProbe": {
+                  "timeoutSeconds": 3,
+                  "initialDelaySeconds": 3,
+                  "httpGet": {
+                    "path": "/health",
+                    "port": 8080
+                  }
+                },
+                "livenessProbe": {
+                  "timeoutSeconds": 3,
+                  "initialDelaySeconds": 30,
+                  "httpGet": {
+                    "path": "/health",
+                    "port": 8080
+                  }
+                },
                 "env": [
                   {
                     "name": "DATABASE_SERVICE_NAME",
@@ -195,9 +211,9 @@
                   }
                 ],
                 "resources": {
-		      "limits": {
-			  "memory": "${MEMORY_LIMIT}"
-		      }
+                  "limits": {
+                    "memory": "${MEMORY_LIMIT}"
+                  }
                 }
               }
             ]
@@ -294,10 +310,24 @@
                     "value": "${DATABASE_NAME}"
                   }
                 ],
+                "readinessProbe": {
+                  "timeoutSeconds": 1,
+                  "initialDelaySeconds": 5,
+                  "exec": {
+                    "command": [ "/bin/sh", "-i", "-c", "psql -h 127.0.0.1 -U ${POSTGRESQL_USER} -q -d ${POSTGRESQL_DATABASE} -c 'SELECT 1'"]
+                  }
+                },
+                "livenessProbe": {
+                  "timeoutSeconds": 1,
+                  "initialDelaySeconds": 30,
+                  "tcpSocket": {
+                    "port": 5432
+                  }
+                },
                 "resources": {
-		      "limits": {
-			  "memory": "${MEMORY_POSTGRESQL_LIMIT}"
-		      }
+                  "limits": {
+                    "memory": "${MEMORY_POSTGRESQL_LIMIT}"
+                  }
                 }
               }
             ]

openshift/templates/django.json

@@ -164,6 +164,22 @@
                     "containerPort": 8080
                   }
                 ],
+                "readinessProbe": {
+                  "timeoutSeconds": 3,
+                  "initialDelaySeconds": 3,
+                  "httpGet": {
+                    "path": "/",
+                    "port": 8080
+                  }
+                },
+                "livenessProbe": {
+                  "timeoutSeconds": 3,
+                  "initialDelaySeconds": 30,
+                  "httpGet": {
+                    "path": "/",
+                    "port": 8080
+                  }
+                },
                 "env": [
                   {
                     "name": "DATABASE_SERVICE_NAME",

project/urls.py

@@ -7,5 +7,6 @@
     # url(r'^blog/', include('blog.urls')),
 
     url(r'^$', 'welcome.views.index'),
+    url(r'^health$', 'welcome.views.health'),
     url(r'^admin/', include(admin.site.urls)),
 ]

welcome/views.py

@@ -1,6 +1,7 @@
 import os
 from django.shortcuts import render
 from django.conf import settings
+from django.http import HttpResponse
 
 from . import database
 from .models import PageView
@@ -16,3 +17,6 @@ def index(request):
         'database': database.info(),
         'count': PageView.objects.count()
     })
+
+def health(request):
+    return HttpResponse(PageView.objects.count())