chore: add health checks to Docker Compose file (#3240)

Co-authored-by: David Regla <[email protected]>

Author: dabeeeenster

docker-compose.yml

@@ -1,5 +1,5 @@
 # See https://docs.flagsmith.com/deployment/docker for more information on running Flagsmith in Docker
-# This will docker-compose file will run the entire Flagsmith Platform in Docker
+# This Docker Compose file will run the entire Flagsmith Platform
 
 version: '3'
 
@@ -15,6 +15,12 @@ services:
     container_name: flagsmith_postgres
     volumes:
       - pgdata:/var/lib/postgresql/data
+    healthcheck:
+      test: ['CMD-SHELL', 'pg_isready -d flagsmith -U postgres']
+      interval: 2s
+      timeout: 2s
+      retries: 20
+      start_period: 20s
 
   flagsmith:
     image: flagsmith/flagsmith:latest
@@ -26,34 +32,38 @@ services:
       DATABASE_URL: postgresql://postgres:password@postgres:5432/flagsmith
       USE_POSTGRES_FOR_ANALYTICS: 'true' # Store API and Flag Analytics data in Postgres
 
-      ENV: prod # set to "prod" in production.
+      ENV: prod # set to 'prod' in production.
       DJANGO_ALLOWED_HOSTS: '*' # Change this in production
       ALLOW_ADMIN_INITIATION_VIA_CLI: 'true' # Change this in production
-      FLAGSMITH_DOMAIN: 'localhost:8000' # Change this in production
-      DJANGO_SECRET_KEY: 'secret' # Change this in production
-      # PREVENT_SIGNUP: "true" # Uncomment to prevent additional signups
-      # ENABLE_ADMIN_ACCESS_USER_PASS: "true" # set to "true" to enable access to the /admin/ Django backend via your username and password
-      # ALLOW_REGISTRATION_WITHOUT_INVITE: "true"
+      FLAGSMITH_DOMAIN: localhost:8000 # Change this in production
+      DJANGO_SECRET_KEY: secret # Change this in production
+      # PREVENT_SIGNUP: 'true' # Uncomment to prevent additional signups
+      # ENABLE_ADMIN_ACCESS_USER_PASS: 'true' # Uncomment to enable access to the /admin/ Django backend via your username and password
+      # ALLOW_REGISTRATION_WITHOUT_INVITE: 'true'
 
       # Enable Task Processor
       TASK_RUN_METHOD: TASK_PROCESSOR # other options are: SYNCHRONOUSLY, SEPARATE_THREAD (default)
+
       # For more info on configuring E-Mails - https://docs.flagsmith.com/deployment/locally-api#environment-variables
-      #
       # Example SMTP:
       # EMAIL_BACKEND: django.core.mail.backends.smtp.EmailBackend
       # EMAIL_HOST: mail.example.com
       # SENDER_EMAIL: [email protected]
       # EMAIL_HOST_USER: [email protected]
       # EMAIL_HOST_PASSWORD: smtp_account_password
       # EMAIL_PORT: 587 # optional
-      # EMAIL_USE_TLS: "true" # optional
-
+      # EMAIL_USE_TLS: 'true' # optional
     ports:
-      - '8000:8000'
+      - 8000:8000
+    healthcheck:
+      test: ['CMD-SHELL', 'python /app/scripts/healthcheck.py']
+      interval: 2s
+      timeout: 2s
+      retries: 20
+      start_period: 20s
     depends_on:
-      - postgres
-    links:
-      - postgres
+      postgres:
+        condition: service_healthy
 
   # The flagsmith_processor service is only needed if TASK_RUN_METHOD set to TASK_PROCESSOR
   # in the application environment
@@ -63,8 +73,6 @@ services:
       DATABASE_URL: postgresql://postgres:password@postgres:5432/flagsmith
       USE_POSTGRES_FOR_ANALYTICS: 'true'
     depends_on:
-      - flagsmith
-      - postgres
-    links:
-      - postgres
+      flagsmith:
+        condition: service_healthy
     command: run-task-processor