https://www.cnblogs.com/aguncn/p/9933204.html
如果学会了如何抓取app的metrics，则blackbox-exporter抓取网络性能套路是相同的。
一，在blackbox-exporter的blackbox.yml里配置好抓取模块，常见的是http_get,http_post,tcp,icmp。
二，在prometheus的平台侧，配置好抓取http-probe或tcp-probe的job规则。
三，应用侧的service里加上相关annotation注释，配合prometheus的metrics抓取。
下面根据网上文档，记录相关的yaml文件。
一，blackbox-exporter的blackbox.yam的configmap配置。
apiVersion: v1 kind: ConfigMap metadata:labels:app: prometheus-blackbox-exportername: prometheus-blackbox-exporternamespace: kube-system data:blackbox.yml: |-modules:http_2xx:prober: httptimeout: 10shttp:valid_http_versions: ["HTTP/1.1", "HTTP/2"]
# 这里最好作一个返回状态码，在grafana作图时，有明示---陈刚注释。valid_status_codes: [200]method: GETpreferred_ip_protocol: "ip4"http_post_2xx: # http post 监测模块prober: httptimeout: 10shttp:valid_http_versions: ["HTTP/1.1", "HTTP/2"]method: POSTpreferred_ip_protocol: "ip4"tcp_connect:prober: tcptimeout: 10sicmp:prober: icmptimeout: 10sicmp:preferred_ip_protocol: "ip4"
备注：
blackbox-exporter的配置文件为/etc/blackbox_exporter/blackbox.yml，可以运行时动态的重新加载配置文件，当重新加载配置文件失败时，不影响在运行的配置。重载方式：curl -XPOST http://IP:9115/-/reload
二，blackbox-exporter的yaml文件。
apiVersion: extensions/v1beta1 kind: Deployment metadata:name: prometheus-blackbox-exporternamespace: kube-system spec:selector:matchLabels:app: prometheus-blackbox-exporterreplicas: 1template:metadata:labels:app: prometheus-blackbox-exporterspec:restartPolicy: Alwayscontainers:- name: prometheus-blackbox-exporterimage: prom/blackbox-exporter:v0.12.0imagePullPolicy: IfNotPresentports:- name: blackbox-portcontainerPort: 9115readinessProbe:tcpSocket:port: 9115initialDelaySeconds: 5timeoutSeconds: 5resources:requests:memory: 50Micpu: 100mlimits:memory: 60Micpu: 200mvolumeMounts:- name: configmountPath: /etc/blackbox_exporterargs:- --config.file=/etc/blackbox_exporter/blackbox.yml- --log.level=debug- --web.listen-address=:9115volumes:- name: configconfigMap:name: prometheus-blackbox-exporternodeSelector:node-role.kubernetes.io/master: "true"tolerations:- key: "node-role.kubernetes.io/master"effect: "NoSchedule" --- apiVersion: v1 kind: Service metadata:labels:app: prometheus-blackbox-exportername: prometheus-blackbox-exporternamespace: kube-systemannotations:prometheus.io/scrape: 'true' spec:type: NodePortselector:app: prometheus-blackbox-exporterports:- name: blackboxport: 9115targetPort: 9115nodePort: 30009protocol: TCP
三，prometheus的job配置。
- job_name: 'kubernetes-service-http-probe'tls_config:ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crtbearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/tokenkubernetes_sd_configs:- role: service# 将metrics_path由默认的/metrics改为/probemetrics_path: /probe# Optional HTTP URL parameters.# 生成__param_module="http_2xx"的labelparams:module: [http_2xx]relabel_configs:# 只保留含有label为prometheus/io=scrape的service- source_labels: [__meta_kubernetes_service_annotation_prometheus_io_scrape, __meta_kubernetes_service_annotation_prometheus_io_http_probe]regex: true;trueaction: keep- source_labels: [__meta_kubernetes_service_name, __meta_kubernetes_namespace, __meta_kubernetes_service_annotation_prometheus_io_http_probe_port, __meta_kubernetes_service_annotation_prometheus_io_http_probe_path]action: replacetarget_label: __param_targetregex: (.+);(.+);(.+);(.+)replacement: $1.$2:$3$4# 用__address__这个label的值创建一个名为__param_target的label为blackbox-exporter,值为内部service的访问地址，作为blackbox-exporter采集用#- source_labels: [__address__, __meta_kubernetes_service_annotation_prometheus_io_http_probe_path]# action: replace# target_label: __param_target# regex: (.+);(.+)# replacement: $1$2# 用blackbox-exporter的service地址值”prometheus-blackbox-exporter:9115"替换原__address__的值- target_label: __address__replacement: prometheus-blackbox-exporter:9115- source_labels: [__param_target]target_label: instance# 去掉label name中的前缀__meta_kubernetes_service_annotation_prometheus_io_app_info_- action: labelmapregex: __meta_kubernetes_service_annotation_prometheus_io_app_info_(.+)#- source_labels: [__meta_kubernetes_namespace]# target_label: kubernetes_namespace#- source_labels: [__meta_kubernetes_service_name]# target_label: kubernetes_name## kubernetes-services and kubernetes-ingresses are blackbox_exporter related# Example scrape config for probing services via the Blackbox Exporter.# # The relabeling allows the actual service scrape endpoint to be configured# for all or only some services.- job_name: 'kubernetes-service-tcp-probe'tls_config:ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crtbearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/tokenkubernetes_sd_configs:- role: service# 将metrics_path由默认的/metrics改为/probemetrics_path: /probe# Optional HTTP URL parameters.# 生成__param_module="tcp_connect"的labelparams:module: [tcp_connect]relabel_configs:# 只保留含有label为prometheus/io=scrape的service- source_labels: [__meta_kubernetes_service_annotation_prometheus_io_scrape, __meta_kubernetes_service_annotation_prometheus_io_tcp_probe]regex: true;trueaction: keep- source_labels: [__meta_kubernetes_service_name, __meta_kubernetes_namespace, __meta_kubernetes_service_annotation_prometheus_io_tcp_probe_port]action: replacetarget_label: __param_targetregex: (.+);(.+);(.+)replacement: $1.$2:$3# 用__address__这个label的值创建一个名为__param_target的label为blackbox-exporter,值为内部service的访问地址，作为blackbox-exporter采集用#- source_labels: [__address__]# target_label: __param_target# 用blackbox-exporter的service地址值”prometheus-blackbox-exporter:9115"替换原__address__的值- target_label: __address__replacement: prometheus-blackbox-exporter:9115- source_labels: [__param_target]target_label: instance# 去掉label name中的前缀__meta_kubernetes_service_annotation_prometheus_io_app_info_- action: labelmapregex: __meta_kubernetes_service_annotation_prometheus_io_app_info_(.+)
四，应用侧的service的annotation段配合的配置。
# http_probe prometheus.io/scrape: 'true' prometheus.io/http-probe: 'true' prometheus.io/http-probe-port: '8080' prometheus.io/http-probe-path: '/healthz' # tcp_probe prometheus.io/scrape: 'true' prometheus.io/tcp-probe: 'true' prometheus.io/tcp-probe-port: '80'
有了这些操作，以后要增加http或tcp的探测时，直接操作应用service即可接入。
