Update so-docker-prune

salt/common/tools/sbin/so-docker-prune

@@ -4,22 +4,16 @@
 # or more contributor license agreements. Licensed under the Elastic License 2.0 as shown at 
 # https://securityonion.net/license; you may not use this file except in compliance with the
 # Elastic License 2.0.
-
-
-
-import sys, argparse, re, docker
+import sys, argparse, re, subprocess, json
 from packaging.version import Version, InvalidVersion
 from itertools import groupby, chain
 
-
 def get_image_name(string) -> str:
   return ':'.join(string.split(':')[:-1])
 
-
 def get_so_image_basename(string) -> str:
   return get_image_name(string).split('/so-')[-1]
 
-
 def get_image_version(string) -> str:
   ver = string.split(':')[-1]
   if ver == 'latest':
@@ -35,33 +29,49 @@ def get_image_version(string) -> str:
         return '999999.9.9'
     return ver
 
+def run_command(command):
+    process = subprocess.run(command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
+    if process.returncode != 0:
+        print(f"Error executing command: {command}", file=sys.stderr)
+        print(f"Error message: {process.stderr}", file=sys.stderr)
+        exit(1)
+    return process.stdout
 
 def main(quiet):
-  client = docker.from_env()
-
-  # Prune old/stopped containers
+    try:
+        # Prune old/stopped containers using docker CLI
         if not quiet: print('Pruning old containers')
-  client.containers.prune()
+        run_command('docker container prune -f')
         
-  image_list = client.images.list(filters={ 'dangling': False })
+        # Get list of images using docker CLI
+        images_json = run_command('docker images --format "{{json .}}"')
         
-  # Map list of image objects to flattened list of tags (format: "name:version")
-  tag_list = list(chain.from_iterable(list(map(lambda x: x.attrs.get('RepoTags'), image_list))))
+        # Parse the JSON output
+        image_list = []
+        for line in images_json.strip().split('\n'):
+            if line:  # Skip empty lines
+                image_list.append(json.loads(line))
         
+        # Extract tags in the format "name:version"
+        tag_list = []
+        for img in image_list:
+            # Skip dangling images
+            if img.get('Repository') != "<none>" and img.get('Tag') != "<none>":
+                tag = f"{img.get('Repository')}:{img.get('Tag')}"
                 # Filter to only SO images (base name begins with "so-")
-  tag_list = list(filter(lambda x: re.match(r'^.*\/so-[^\/]*$', get_image_name(x)), tag_list))
+                if re.match(r'^.*\/so-[^\/]*$', get_image_name(tag)):
+                    tag_list.append(tag)
         
         # Group tags into lists by base name (sort by same projection first)
         tag_list.sort(key=lambda x: get_so_image_basename(x))
-  grouped_tag_lists = [ list(it) for _, it in groupby(tag_list, lambda x: get_so_image_basename(x)) ]
+        grouped_tag_lists = [list(it) for k, it in groupby(tag_list, lambda x: get_so_image_basename(x))]
         
         no_prunable = True
         for t_list in grouped_tag_lists:
             try:
                 # Group tags by version, in case multiple images exist with the same version string
                 t_list.sort(key=lambda x: Version(get_image_version(x)), reverse=True)
-      grouped_t_list = [ list(it) for _,it in groupby(t_list, lambda x: get_image_version(x)) ]
-
+                grouped_t_list = [list(it) for k, it in groupby(t_list, lambda x: get_image_version(x))]
                 # Keep the 2 most current version groups
                 if len(grouped_t_list) <= 2:
                     continue
@@ -71,10 +81,10 @@ def main(quiet):
                         for tag in group:
                             if not quiet: print(f'Removing image {tag}')
                             try:
-              client.images.remove(tag, force=True)
-            except docker.errors.ClientError as e:
+                                run_command(f'docker rmi -f {tag}')
+                            except Exception as e:
                                 print(f'Could not remove image {tag}, continuing...')
-    except (docker.errors.APIError, InvalidVersion) as e:
+            except (InvalidVersion) as e:
                 print(f'so-{get_so_image_basename(t_list[0])}: {e}', file=sys.stderr)
                 exit(1)
             except Exception as e:
@@ -85,6 +95,9 @@ def main(quiet):
         if no_prunable and not quiet:
             print('No Security Onion images to prune')
     
+    except Exception as e:
+        print(f"Error: {e}", file=sys.stderr)
+        exit(1)
 
 if __name__ == "__main__":
   main_parser = argparse.ArgumentParser(add_help=False)