handle detach for swarm containers without replica

Author: bbilly1

app/main.py

@@ -122,10 +122,14 @@ async def execute_docker_commands():
         for service_json in services_json:
             image = service_json.Image
             name = service_json.Name
+            replicas_is = service_json.ReplicasIs
+            detach = "true" if replicas_is == 0 else "false"
+
             await run_command(
                 (
                     "docker service update "
-                    f"--image {image} {registry_auth} --force {name}"
+                    f"--image {image} {registry_auth} "
+                    f"--force {name} --detach={detach}"
                 )
             )
 

app/src/types.py

@@ -2,7 +2,7 @@
 
 from typing import Optional
 
-from pydantic import BaseModel
+from pydantic import BaseModel, Field, model_validator
 
 
 class ReturnMessage(BaseModel):
@@ -27,11 +27,27 @@ class SwarmRequestData(BaseModel):
 
 
 class ServiceJsonType(BaseModel):
-    """describes a response type for services"""
+    """Describes a response type for services"""
 
     ID: str
     Image: str
     Mode: str
     Name: str
     Ports: str
     Replicas: str
+
+    ReplicasIs: Optional[int] = Field(default=None, exclude=True)
+    ReplicasShould: Optional[int] = Field(default=None, exclude=True)
+
+    @model_validator(mode="after")
+    def parse_replicas(self):
+        """split replicas into ints"""
+        try:
+            is_, should = self.Replicas.split("/")
+            self.ReplicasIs = int(is_)
+            self.ReplicasShould = int(should)
+        except Exception as exc:
+            raise ValueError(
+                f"Invalid Replicas format: {self.Replicas}"
+            ) from exc
+        return self