检查 metrics 接口
➜ kubectl describe cm coredns -n kube-system
Name: coredns
Namespace: kube-system
Labels: <none>
Annotations: <none>
Data
====
Corefile:
----
.:53 {
errors
health {
lameduck 5s
}
ready
kubernetes cluster.local in-addr.arpa ip6.arpa {
pods insecure
fallthrough in-addr.arpa ip6.arpa
ttl 30
}
prometheus :9153
forward . /etc/resolv.conf {
max_concurrent 1000
}
cache 30
loop
reload
loadbalance
}
Events: <none>
prometheus :9153 表示开启
确认 coredns 的 pod 地址
➜ kubectl get pod -n kube-system -o wide | grep coredns
coredns-78fcd69978-dt4lx 1/1 Running 1 (34d ago) 121d 10.97.0.195 k8s01 <none> <none>
coredns-78fcd69978-nzb7m 1/1 Running 1 (34d ago) 121d 10.97.0.183 k8s01 <none> <none>
添加抓取配置
apiVersion: v1
kind: ConfigMap
metadata:
name: prometheus-config
namespace: monitor
data:
prometheus.yml: |
global:
scrape_interval: 15s
scrape_timeout: 15s
scrape_configs:
- job_name: 'prometheus'
static_configs:
- targets: ['localhost:9090']
- job_name: 'coredns'
static_configs:
- targets: ['10.97.0.195:9153', '10.97.0.183:9153']
重载prometheus
curl -X POST http://prometheus_ip:9090/-/reload