在k8s中部署Prometheus

- job_name: 'kubernetes-nodes'
 scheme: https
 tls_config:
 ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
 bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token
  
 kubernetes_sd_configs:
 - role: node
  
 relabel_configs:
    # 即从 __meta_kubernetes_node_label_ 这个配置中取出 labelname 以及 value
 - action: labelmap
 regex: __meta_kubernetes_node_label_(.+)
    
    # 配置 address 为 k8s api 的地址，相关的 ca 证书以及 token 在上面配置
 - target_label: __address__
 replacement: kubernetes.default.svc:443
    
    # 取出所有的 node，然后设置 /api/v1/nodes//proxy/metrics 为 metrics path
 - source_labels: 
 - __meta_kubernetes_node_name
 regex: (.+)
 target_label: __metrics_path__
 replacement: /api/v1/nodes/${1}/proxy/metrics

- job_name: 'kubernetes-pods'

 kubernetes_sd_configs:
 - role: pod

 relabel_configs:
 - source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_scrape]
 action: keep
 regex: true
 - source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_path]
 action: replace
 target_label: __metrics_path__
 regex: (.+)
 - source_labels: [__address__, __meta_kubernetes_pod_annotation_prometheus_io_port]
 action: replace
 regex: ([^:]+)(?::\d+)?;(\d+)
 replacement: $1:$2
 target_label: __address__
 - action: labelmap
 regex: __meta_kubernetes_pod_label_(.+)
 - source_labels: [__meta_kubernetes_namespace]
 action: replace
 target_label: kubernetes_namespace
 - source_labels: [__meta_kubernetes_pod_name]
 action: replace
 target_label: kubernetes_pod_name

annotations:
  prometheus.io/scrape: "true"
  prometheus.io/port: ""

apiVersion: v1
kind: ConfigMap
metadata:
 name: prometheus
 namespace: kube-system
 labels:
 app: prometheus
data:
  prometheus.yml: |-
  # 省略，在这里定义你需要的配置
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
 name: prometheus
 namespace: kube-system
spec:
 replicas: 1
 template:
 metadata:
 labels:
 app: prometheus
 spec:
 containers:
 - name: prometheus
 image: prom/prometheus:latest
 args:
 - '-config.file=/prometheus-data/prometheus.yml'
          # 显然，这里没有用 `Stateful Sets`，存储时间不用太长
 - '-storage.local.retention=48h0m0s'
 ports:
 - name: prometheus
 containerPort: 9090
 volumeMounts:
 - name: data-volume
 mountPath: /prometheus-data
 volumes:
 - name: data-volume
 configMap:
 name: prometheus
---
# 简单处理，直接使用 NodePort 暴露服务，你也可以使用 Ingress
apiVersion: v1
kind: Service
metadata:
 name: prometheus
 namespace: kube-system
spec:
 selector:
 app: prometheus
 ports:
 - name: prometheus
 protocol: TCP
 port: 9090
 nodePort: 30090
 type: NodePort

- job_name: 'federate'
 scrape_interval: 15s

 honor_labels: true
 metrics_path: '/federate'

 params:
    'match[]':
 - '{job=~".+"}' # 取 k8s 里面部署的 Prometheus 中所有的 job 数据

 static_configs:
 - targets:
 - ':30090'
 - ':30090'
 - ':30090'