服务发现 - 监控相关

#基于文件的服务发现
####server的配置文件
	  - job_name: 'node'
	    file_sd_configs:
	      - files:
	        - targets/nodes/*.json
	        refresh_interval: 5m
			#该选项将在每个间隔结束时加载文件列表（每5分钟加载一次）
	  - job_name: 'docker'
	    file_sd_configs:
	      - files:
	        - targets/docker/*.yml
	        refresh_interval: 5m
			#该选项将在每个间隔结束时加载文件列表（每5分钟加载一次）

####目标文件（ json / yaml ）
	#json格式
	vim targets/nodes/nodes.json
	#内容：
	[{
	  "targets": [
	     "192.168.1.124:9100",
		 "192.168.1.125:9100",
		 "192.168.1.126:9100"
	    ]
	}]
	---------------------------------------------------------
	#yaml格式
	vim targets/docker/dockers.yml
	#内容：
	- targets:
	  - "192.168.1.124:8080"
	  - "192.168.1.125:8080"
	  - "192.168.1.126:8080"

---
#基于API的服务发现
###K8S的api范例：
---
####修改prometheus配置
	vim prometheus.yml
	#内容：
      - job_name: 'k8s-cadvisor'
        metrics_path: /metrics/cadvisor
		#k8s的api服务发现配置
		#-----------------------------------------------------
        kubernetes_sd_configs:   
        - api_server: 'http://172.16.16.168:8080'
          role: node
		#-----------------------------------------------------
        relabel_configs:
        - source_labels: [__meta_kubernetes_node_name]
          target_label: __metrics_path__
          replacement: /api/v1/nodes/${1}/proxy/metrics/cadvisor
        - source_labels: [__address__]
          regex: '(.*):10250'
          replacement: '172.16.16.168:8080'
          target_label: __address__
        - action: labelmap
          regex: __meta_kubernetes_node_label_(.+)
        metric_relabel_configs:
        - source_labels: [instance]
          separator: ;
          regex: (.+)
          target_label: node
          replacement: $1
          action: replace
        - source_labels: [pod_name]
          separator: ;
          regex: (.+)
          target_label: pod
          replacement: $1
          action: replace
        - source_labels: [container_name]
          separator: ;
          regex: (.+)
          target_label: container
          replacement: $1
          action: replace

---
#基于DNS的服务发现
####基于 A 记录
	  - job_name: 'webapp'
	    dns_sd_configs:
	    - names: [ 'ops.shhnwangjian.cn']
	      type: A
	      port: 9090