How to alert about only some services?

[Jedore]

I want to alert only one service, and other services don't need to be alerted. Can skywalking support it? Thanks.

[pg-yang]

https://skywalking.apache.org/docs/main/next/en/setup/backend/backend-alarm/

[Jedore]

Thanks very much @pg-yang. I have read the doc, but I can't make the solution. I have two services K::A and K::B, I want to alert about K::A but exclude K::B. Can you give me some more tips? Btw, skywalking 9.3.0.

[wu-sheng]

Include the sepcific service name with required metric names.

[Jedore]

Thanks.

[Jedore]

It's my solution:

1. modify metrics in config/oa/*.oal:
   as https://skywalking.apache.org/docs/main/next/en/guides/backend-oal-scripts/ said.

   From 8.0.0, you may find the OAL script at /config/oal/*.oal of the SkyWalking dist. You could change it, such as by adding filter
   conditions or new metrics. Then, reboot the OAP server, and it will come into effect.
   All metrics named in this script could be used in alarm and UI query.

   I add a new metrics in config/oal/core.oal to distinguish different services:

   kg_service_resp_time = from(Service.latency).filter(name in ["kg-graph::prod", "kg-graph::pre", "kg-graph::test", "kg-graph::dev"]).longAvg();
   

2. modify alarm-settings.yml:
   use updated or new metrics:

   rules:                                                                                                                                                                                                                                         
     service_resp_time_rule:
       metrics-name: kg_service_resp_time
       op: ">" 
       threshold: 1000
       period: 10
       count: 3
       silence-period: 5
       message: Response time of service {name} is more than 1000ms in 3 minutes of last 10 minutes.
   

And thanks for the tips of @pg-yang and @wu-sheng .