fix(stress-threads): kill only labeled docker containers on loaders

There is no any filtering of docker instances, when killing containerized stress threads on
loader nodes during teardown of a test. In the case of docker backend this can result in
deleting all containers in the system.

The change fixes this by labeling stress thread related docker containers when they
are created; and deleting only the labeled containers during the teardown.

Fixes: #9027

sdcm/cluster.py

@@ -5269,9 +5269,12 @@ def kill_cs_process(loader, filter_cmd):
                                  str(loader), str(ex))
 
     def kill_docker_loaders(self):
+        test_id = self.tags.get('TestId')
         for loader in self.nodes:
             try:
-                loader.remoter.run(cmd='docker ps -a -q | xargs docker rm -f', verbose=True, ignore_status=True)
+                loader.remoter.run(
+                    cmd=f'docker ps -a -q --filter label=TestId={test_id} | xargs docker rm -f',
+                    verbose=True, ignore_status=True)
                 self.log.info("Killed docker loader on node: %s", loader.name)
             except Exception as ex:  # pylint: disable=broad-except  # noqa: BLE001
                 self.log.warning("failed to kill docker stress command on [%s]: [%s]",

sdcm/utils/docker_remote.py

@@ -22,6 +22,7 @@ def __init__(self, node, image_name, ports=None, command_line="tail -f /dev/null
         if docker_network:
             extra_docker_opts += f" --network {docker_network}"
             self.create_network(docker_network)
+        extra_docker_opts += f" --label TestId={node.test_config.test_id()}"
         res = self.node.remoter.run(
             f'{self.sudo_needed} docker run {extra_docker_opts} -d {ports} {image_name} {command_line}',
             verbose=True, retry=3)