Monitoring K8s

Monitoring in K8s using Prometheus

• This CRD is a part of Prometheus (in bundle-monitoring) - It is only possible to apply a ServiceMonitor if this CRD Prometheus Operator has been deployed in Kubernetes cluster

# check if prometheus operator is deployed

kubectl get crd -A | grep servicemonitors
kubectl get customresourcedefinitions.apiextensions.k8s.io servicemonitors.monitoring.coreos.com

• ServiceMonitor and PodMonitor can be created in any namespace, as long as the Prometheus Operator has permissions to find it
• A PodMonitoring CR scrapes targets only in the namespace the CR is deployed in.
• To scrape targets in multiple namespaces, deploy the same PodMonitoring CR in each namespace

kubectl get podmonitoring -A
kubectl get servicemonitor -A

Monitoring RabbitMQ

• General stuff. What RabbitMQ metrics are available ?

  • Node metrics
  • Queue metrics
  • Cluster-wide metrics

• To enable monitoring

RabbitMQ management plugin provides an HTTP-based API for the management and monitoring of RabbitMQ nodes and clusters

# Node restart is not required after plugin activation
rabbitmq-plugins enable rabbitmq_management