Configuration
For DNS Monitoring we require a target to be configured on the Prometheus Config.
- job_name: coredns
scrape_interval: 5s
metrics_path: /metrics
static_configs:
- targets: ['kube-dns.kube-system.svc:9153']
The default Metrics port is: 9153, if you change this, remember to update the target Port. The default service for dns does not expose this port however, so you need to add this to the dns service configuration under specs, ports:
- name: metrics
protocol: TCP
port: 9153
targetPort: 9153
The full object is as follows:
spec:
ports:
- name: dns
protocol: UDP
port: 53
targetPort: 53
- name: dns-tcp
protocol: TCP
port: 53
targetPort: 53
- name: metrics
protocol: TCP
port: 9153
targetPort: 9153
Dashboard
There are numerous dashboards available to monitor Core DNS, the one we’re using has to code: 5926
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