Changes to allow starting per asic services like swss and syncd only if the platform vendor codedetects the asic is detected and notified. The systemd services ordering we want is database->database@->pmon->swss@->syncd@->teamd@->lldp@
There is also a requirement that management, telemetry, snmp dockers can start even if all asic services are not up.
Why I did it
For VOQ chassis, the fabric cards will have 1-N asics. Also, there could be multiple removable fabric cards. On the supervisor, swss and syncd containers need to be started only if the fabric-card is in Online state and respective asics are detected by the kernel. Using systemd, the dependent services can be in inactive state.
How I did it
Introduce a mechanism where all ASIC dependent service wait on its state to be published via PMON to REDIS. Once the subscription is received, the service proceeds to create respective dockers.
For fixed platforms, systemd is unchanged i.e. the service bring up and docker creation happens in the start()/ExecStartPre routine of the .sh scripts.
For VOQ chassis platform on supervisor, the service bringup skips docker creation in the start() routine, but does it in the wait()/ExecStart routine of the .sh scrips.
Management dockers are decoupled from ASIC docker creation.
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>
