feat: ping additional services using doctor

handle error
docs entry for health check command

build/common/commands/doctor.py

@@ -32,9 +32,18 @@ def main():
     print("Redis Queue Connected")
     check_redis_socketio(retry=1, delay=0, print_attempt=False)
     print("Redis SocketIO Connected")
+
     if(args.ping_services):
         for service in args.ping_services:
-            service_name, service_port = service.split(':')
+            service_name = None
+            service_port = None
+
+            try:
+                service_name, service_port = service.split(':')
+            except ValueError:
+                print('Service should be in format host:port, e.g postgres:5432')
+                exit(1)
+
             check_service(
                 retry=1,
                 delay=0,

docs/site-operations.md

@@ -189,3 +189,15 @@ docker run \
 ```
 
 Instead of `alpine` use any image of your choice.
+
+## Health check
+
+For socketio and gunicorn service ping the hostname:port and that will be sufficient. For workers and scheduler, there is a command that needs to be executed.
+
+```shell
+docker exec -it <project-name>_erpnext-worker-d \
+    docker-entrypoint.sh doctor -p postgresql-master.pgsql.svc.cluster.local:5432
+```
+
+This check ensures that given service should be connected along with services in common_site_config.json.
+If connection to service(s) fails, the command fails with exit code 1.