GCP LB monitor healthy nodes count

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Google cloud load balancer monitoring dashboard provides number of healthy nodes: enter image description here

Is it any metric / MQL which can be used to create an alert if one node considered as down?

google-cloud-monitoring google-cloud-load-balancer
1 Answers

There is no direct metric for the Load Balancer's backends, but what you can do is to create a Monitoring group containing them, and then set up an Uptime check for monitoring and alerting; you can follow these steps to accomplish that:

  1. Tag all the backend instances:
gcloud compute instances add-tags <instance_name> --tags=lb-backend --zone <instance_zone>

  1. Create the monitoring group using Resource Type = gce_instance AND the tag as discriminators: enter image description here

  2. Create the Uptime check and alerting policy for that group: enter image description here

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