Remove stale backup process containers

src/restic_compose_backup/utils.py

@@ -1,26 +1,45 @@
 import os
+import logging
+from typing import List
 from contextlib import contextmanager
 import docker
-
 from restic_compose_backup.config import Config
 
+logger = logging.getLogger(__name__)
+
 TRUE_VALUES = ['1', 'true', 'True', True, 1]
 
 
-def list_containers():
+def docker_client():
+    config = Config()
+    return docker.DockerClient(base_url=config.docker_base_url)
+
+
+def list_containers() -> List[dict]:
     """
     List all containers.
 
     Returns:
         List of raw container json data from the api
     """
-    config = Config()
-    client = docker.DockerClient(base_url=config.docker_base_url)
+    client = docker_client()
     all_containers = client.containers.list(all=True)
     client.close()
     return [c.attrs for c in all_containers]
 
 
+def remove_containers(containers: List['Container']):
+    client = docker_client()
+    logger.info('Attempting to delete stale backup process containers')
+    for container in containers:
+        logger.info(' -> deleting %s', container.name)
+        try:
+            c = client.containers.get(container.name)
+            c.remove()
+        except Exception as ex:
+            logger.exception(ex)
+
+
 def is_true(value):
     """
     Evaluates the truthfullness of a bool value in container labels