List all containers including non-running ones

src/restic_compose_backup/containers.py

@@ -142,7 +142,7 @@ class Container:
 
     @property
     def is_running(self) -> bool:
-        """Is the container running?"""
+        """bool: Is the container running?"""
         return self._state.get('Running', False)
 
     @property
@@ -326,10 +326,14 @@ class RunningContainers:
         if not self.this_container:
             raise ValueError("Cannot find metadata for backup container")
 
-        # Gather all containers in the current compose setup
+        # Gather all running containers in the current compose setup
         for container_data in all_containers:
             container = Container(container_data)
 
+            # We only care about running containers
+            if not container.is_running:
+                continue
+
             # Detect running backup process container
             if container.is_backup_process_container:
                 self.backup_process_container = container

src/restic_compose_backup/utils.py

@@ -16,7 +16,7 @@ def list_containers():
     """
     config = Config()
     client = docker.DockerClient(base_url=config.docker_base_url)
-    all_containers = client.containers.list()
+    all_containers = client.containers.list(all=True)
     client.close()
     return [c.attrs for c in all_containers]