prometheus 通过blackbox监控ip

tcp方式：

      - job_name: 'kubernetes-probe-vip-tcp'
        static_configs:
          - targets: ['nfs-vip:2049']
            labels:
              vip_device: 'nfs-vip'
              instance: nfs-vip
        metrics_path: /probe
        params:
          module: [tcp_connect]
        relabel_configs:
        - action: labelmap
          regex: __meta_kubernetes_pod_label_(.+)
        - source_labels: [__address__]
          target_label: __param_target
        - target_label: __address__
          replacement: blackbox-exporter.default.svc.cluster.local.:9115
        - source_labels: [__param_target]
          target_label: target_url

http方式：

      - job_name: 'kubernetes-probe-vip-http'
        static_configs:
          - targets: ['http://1.1.1.1:1234/xxx']
            labels:
              vip_device: 'xxx'
              instance: 1.1.1.1
        metrics_path: /probe
        params:
          module: [http_2xx]
        relabel_configs:
        - action: labelmap
          regex: __meta_kubernetes_pod_label_(.+)
        - source_labels: [__address__]
          target_label: __param_target
        - target_label: __address__
          replacement: blackbox-exporter.default.svc.cluster.local.:9115
        - source_labels: [__param_target]
          target_label: target_url

通过blackbox请求样例：curl 'http://x.x.x.x:9115/probe?module=tcp_connect&target=y.y.y.y:2049'

响应如下，probe_success为1表示target是通的，为0表示不通：

# HELP probe_dns_lookup_time_seconds Returns the time taken for probe dns lookup in seconds
# TYPE probe_dns_lookup_time_seconds gauge
probe_dns_lookup_time_seconds 2.5184e-05
# HELP probe_duration_seconds Returns how long the probe took to complete in seconds
# TYPE probe_duration_seconds gauge
probe_duration_seconds 0.000606282
# HELP probe_failed_due_to_regex Indicates if probe failed due to regex
# TYPE probe_failed_due_to_regex gauge
probe_failed_due_to_regex 0
# HELP probe_ip_protocol Specifies whether probe ip protocol is IP4 or IP6
# TYPE probe_ip_protocol gauge
probe_ip_protocol 4
# HELP probe_success Displays whether or not the probe was a success
# TYPE probe_success gauge
probe_success 1

产生的指标样例如下：

probe_success{instance="1.1.1.1",job="kubernetes-probe-vip-tcp",target_url="1.1.1.1:2049",vip_device="nfs-vip"} 1

1表示执行telnet 1.1.1.1 2049 是通的，可表示vip是正常的
0表示不通，有可能vip是有问题的，也可能是nfs有问题