raphaelm · December 15, 2015 22:08 · Dec 15, 2015
diff --git a/docker_clean_vfs.py b/docker_clean_vfs.py
@@ -0,0 +1,55 @@
+#!/usr/bin/env python
+"""
+From https://github.com/docker/docker/issues/6354#issuecomment-60817733
+All credit goes to https://github.com/adamhadani
+
+Check all existing Docker containers for their mapped paths, and then purge any
+zombie directories in docker's volumes directory which don't correspond to an
+existing container.
+
+"""
+import logging
+import os
+import sys
+from shutil import rmtree
+
+import docker
+
+
+DOCKER_VOLUMES_DIR = "/var/lib/docker/volumes"
+
+
+def get_immediate_subdirectories(a_dir):
+    return [os.path.join(a_dir, name) for name in os.listdir(a_dir)
+            if os.path.isdir(os.path.join(a_dir, name))]
+
+
+def main():
+    logging.basicConfig(level=logging.INFO)
+
+    client = docker.Client()
+
+    valid_dirs = []
+    for container in client.containers(all=True):
+        volumes = client.inspect_container(container['Id'])['Volumes']
+        if not volumes:
+            continue
+
+        for _, real_path in volumes.iteritems():
+            if real_path.startswith(DOCKER_VOLUMES_DIR):
+                valid_dirs.append(real_path)
+
+    all_dirs = get_immediate_subdirectories(DOCKER_VOLUMES_DIR)
+    invalid_dirs = set([d for d in all_dirs if not [True for x in valid_dirs if x.startswith(d)]])
+
+    logging.info("Purging %s dangling Docker volumes out of %s total volumes found.",
+                 len(invalid_dirs), len(all_dirs))
+    for invalid_dir in invalid_dirs:
+        logging.info("Purging directory: %s", invalid_dir)
+        rmtree(invalid_dir)
+
+    logging.info("All done.")
+
+
+if __name__ == "__main__":
+    sys.exit(main())