ace7f24cba
**- Why I did it**
On teamd docker restart, the swss and syncd needs to be restarted as there are dependent resources present.
**- How I did it**
Add the teamd as a dependent service for swss
Updated the docker-wait script to handle service and dependent services separately.
Handle the case of warm-restart for the dependent service
**- How to verify it**
Verified the following scenario's with the following testbed
VM1 ----------------------------[DUT 6100] -----------------------VM2, ping traffic continuous between VMs
1. Stop teamd docker alone
> swss, syncd dockers seen going away
> The LAG reference count error messages seen for a while till swss docker stops.
> Dockers back up.
2. Enable WR mode for teamd. Stop teamd docker alone
> swss, syncd dockers not removed.
> The LAG reference count error messages not seen
> Repeated stop teamd docker test - same result, no effect on swss/syncd.
3. Stop swss docker.
> swss, teamd, syncd goes off - dockers comes back correctly, interfaces up
4. Enable WR mode for swss . Stop swss docker
> swss goes off not affecting syncd/teamd dockers.
5. Config reload
> no reference counter error seen, dockers comes back correctly, with interfaces up
6. Warm reboot, observations below
> swss docker goes off first
> teamd + syncd goes off to the end of WR process.
> dockers comes back up fine.
> ping traffic between VM's was NOT HIT
7. Fast reboot, observations below
> teamd goes off first ( **confirmed swss don't exit here** )
> swss goes off next
> syncd goes away at the end of the FR process
> dockers comes back up fine.
> there is a traffic HIT as per fast-reboot
8. Verified in multi-asic platform, the tests above other than WR/FB scenarios
108 lines
3.8 KiB
Python
Executable File
108 lines
3.8 KiB
Python
Executable File
#!/usr/bin/env python
|
|
|
|
"""
|
|
docker-wait-any
|
|
This script takes one or more Docker container names as arguments,
|
|
[-s] argument is for the service which invokes this script
|
|
[-d] argument is to list the dependent services for the above service.
|
|
It will block indefinitely while all of the specified containers
|
|
are running.If any of the specified containers stop, the script will
|
|
exit.
|
|
|
|
This script was created because the 'docker wait' command is lacking
|
|
this functionality. It will block until ALL specified containers have
|
|
stopped running. Here, we spawn multiple threads and wait on one
|
|
container per thread. If any of the threads exit, the entire
|
|
application will exit, unless we are in a scenario where the following
|
|
conditions are met.
|
|
(i) the container is a dependent service
|
|
(ii) warm restart is enabled at system level or for that container OR
|
|
fast reboot is enabled system level
|
|
In this scenario, the g_thread_exit_event won't be propogated to the parent,
|
|
instead the thread will continue to do docker_client.wait again.This help's
|
|
cases where we need the dependent container to be warm-restarted without
|
|
affecting other services (eg: warm restart of teamd service)
|
|
|
|
NOTE: This script is written against docker Python package 4.1.0. Newer
|
|
versions of docker may have a different API.
|
|
"""
|
|
import argparse
|
|
import sys
|
|
import threading
|
|
import time
|
|
|
|
from docker import APIClient
|
|
from sonic_py_common import logger, device_info
|
|
|
|
SYSLOG_IDENTIFIER = 'docker-wait-any'
|
|
|
|
# Global logger instance
|
|
log = logger.Logger(SYSLOG_IDENTIFIER)
|
|
|
|
# Instantiate a global event to share among our threads
|
|
g_thread_exit_event = threading.Event()
|
|
g_service = []
|
|
g_dep_services = []
|
|
|
|
def wait_for_container(docker_client, container_name):
|
|
while True:
|
|
while docker_client.inspect_container(container_name)['State']['Status'] != "running":
|
|
time.sleep(1)
|
|
|
|
docker_client.wait(container_name)
|
|
|
|
log.log_info("No longer waiting on container '{}'".format(container_name))
|
|
|
|
# If this is a dependent service and warm restart is enabled for the system/container,
|
|
# OR if the system is going through a fast-reboot, DON'T signal main thread to exit
|
|
if (container_name in g_dep_services and
|
|
(device_info.is_warm_restart_enabled(container_name) or device_info.is_fast_reboot_enabled())):
|
|
continue
|
|
|
|
# Signal the main thread to exit
|
|
g_thread_exit_event.set()
|
|
|
|
def main():
|
|
thread_list = []
|
|
|
|
docker_client = APIClient(base_url='unix://var/run/docker.sock')
|
|
|
|
parser = argparse.ArgumentParser(description='Wait for dependent docker services',
|
|
version='1.0.0',
|
|
formatter_class=argparse.RawTextHelpFormatter,
|
|
epilog="""
|
|
Examples:
|
|
docker-wait-any -s swss -d syncd teamd
|
|
""")
|
|
|
|
parser.add_argument('-s','--service', nargs='+', default=None, help='name of the service')
|
|
parser.add_argument('-d','--dependent', nargs='*', default=None, help='other dependent services')
|
|
args = parser.parse_args()
|
|
|
|
global g_service
|
|
global g_dep_services
|
|
|
|
if args.service is not None:
|
|
g_service = args.service
|
|
if args.dependent is not None:
|
|
g_dep_services = args.dependent
|
|
|
|
container_names = g_service + g_dep_services
|
|
|
|
# If the service and dependents passed as args is empty, then exit
|
|
if container_names == []:
|
|
sys.exit(0)
|
|
|
|
for container_name in container_names:
|
|
t = threading.Thread(target=wait_for_container, args=[docker_client, container_name])
|
|
t.daemon = True
|
|
t.start()
|
|
thread_list.append(t)
|
|
|
|
# Wait until we receive an event signifying one of the containers has stopped
|
|
g_thread_exit_event.wait()
|
|
sys.exit(0)
|
|
|
|
if __name__ == '__main__':
|
|
main()
|