Why I did it
BGP service has always been starting after interface-config. However, recently we discovered an issue where some BGP sessions are unable to establish due to BGP daemon not able to read the interface IP.
This issue was clearly observed after upgrading to FRR 8.2.2. See more details in #12380.
How I did it
Delaying starting BGP seems to be a workaround for this issue.
However, caution is that this delay might impact warm reboot timing and other timing sequences.
This workaround is reducing the probability of hitting the issue by close to 100X. However, this workaround is not bulletproof as test shows. It is still preferrable to have a proper FRR fix and revert this change in the future.
How to verify it
Continuously issuing config reload and check BGP session status afterwards.
Signed-off-by: Ying Xie <ying.xie@microsoft.com>
- Why I did it
interfaces-config service restarts networking service, during the restart loopback interface address is being removed and reassigned back, leaving loopback without an ipv4 address for a while.
On SONiC startup and config reload interfaces-config and bgp services start in parallel and sometimes
fpmsyncd in bgp attempts bind to loopback while it does not have an address, fails with the log
Exception "Cannot assign requested address" had been thrown in daemon
and exits with rc 0.
root@sonic:/# supervisorctl status
fpmsyncd EXITED Jul 20 05:04 AM
zebra RUNNING pid 35, uptime 6:15:05
zsocket EXITED Jul 20 05:04 AM
docker logs bgp
INFO exited: fpmsyncd (exit status 0; expected)
With fpmsyncd dead, configured routes do not appear in the database.
- How I did it
Added ordering dependency on interfaces-config service into bgp.config
- How to verify it
Itself the issue reproduces quite rarely, but one can gain the time interval between networking down and networking up in interfaces-config.sh like this:
diff --git a/files/image_config/interfaces/interfaces-config.sh b/files/image_config/interfaces/interfaces-config.sh
index f6aa4147a..87caceeff 100755
--- a/files/image_config/interfaces/interfaces-config.sh
+++ b/files/image_config/interfaces/interfaces-config.sh
@@ -63,7 +63,11 @@ done
# Read sysctl conf files again
sysctl -p /etc/sysctl.d/90-dhcp6-systcl.conf
-systemctl restart networking
+# systemctl restart networking
+
+systemctl start networking
+sleep 10
+systemctl stop networking
# Clean-up created files
rm -f /tmp/ztp_input.json /tmp/ztp_port_data.json
with this change the issue reproduces on every config reload.
Signed-off-by: Volodymyr Boyko <volodymyrx.boiko@intel.com>
* [mux] skip mux operations during warm shutdown
- Enhance write_standby.py script to skip actions during warm shutdown.
- Expand the support to BGP service.
- MuX support was added by a previous PR.
- don't skip action during warm recovery
Signed-off-by: Ying Xie <ying.xie@microsoft.com>
Before this change, a process running inside every SONiC container dealt with FEATURE table 'auto_restart' field and depending on the value decided whether a container has to be killed or not.
If killed service auto restart mechanism restarts the container.
This change moves the logic from container to the host daemon - hostcfgd.
The 'auto_restart' handling is kept in supervisor-proc-exit-listener but now it is not required for container that wants to support auto restart feature.
hostcfgd refactoring - move feature handling in another class.
override systemd service Restart= setting from hostcfgd.
remove default systemd Restart=always.
Signed-off-by: Stepan Blyshchak stepanb@nvidia.com
- Why I did it
Remove the need to deal with container orchestration logic from the container itself. Leave this logic to the orchestrator - host OS.
- How I did it
hostcfgd configures 'Restart=' value for systemd service.
- How to verify it
root@r-tigon-11:/home/admin# sudo config feature autorestart lldp enabled
root@r-tigon-11:/home/admin# show feature status | grep lldp
lldp enabled enabled
root@r-tigon-11:/home/admin# docker exec -it lldp pkill -9 lldpd
root@r-tigon-11:/home/admin# docker ps -a | grep lldp
65058396277c docker-lldp:latest "/usr/bin/docker-lld…" 2 days ago Exited (0) 20 seconds ago lldp
root@r-tigon-11:/home/admin# docker ps -a | grep lldp
65058396277c docker-lldp:latest "/usr/bin/docker-lld…" 2 days ago Up 5 seconds lldp
root@r-tigon-11:/home/admin# sudo config feature autorestart lldp disabled
root@r-tigon-11:/home/admin# docker exec -it lldp pkill -9 lldpd
root@r-tigon-11:/home/admin# docker ps -a | grep lldp
65058396277c docker-lldp:latest "/usr/bin/docker-lld…" 2 days ago Up 35 seconds lldp
root@r-tigon-11:/home/admin# docker ps -a | grep lldp
65058396277c docker-lldp:latest "/usr/bin/docker-lld…" 2 days ago Exited (0) 3 seconds ago lldp
root@r-tigon-11:/home/admin# docker ps -a | grep lldp
65058396277c docker-lldp:latest "/usr/bin/docker-lld…" 2 days ago Exited (0) 39 seconds ago lldp
root@r-tigon-11:/home/admin#
- Why I did it
Group all SONiC services together and able to manage them together. Will be used in config reload command as much simpler and generic way to restart services.
- How I did it
Add services to sonic.target
- How to verify it
Together with Azure/sonic-utilities#1199
config reload -y
Signed-off-by: Stepan Blyshchak <stepanb@nvidia.com>
