promethes收集node_exporter数据不准

1 . 本来的ymal文件是如下, 这样的配置收集到内存，文件系统数据不准

 - job_name: 'kubernetes-node-exporter'
      scheme: http
      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:
      - action: labelmap
        regex: __meta_kubernetes_node_label_(.+)
      - source_labels: [__meta_kubernetes_role]
        action: replace
        target_label: kubernetes_role
      - source_labels: [__address__]
        regex: '(.*):10250'
        replacement: '${1}:9370'
        target_label: __address__

 

2. 改成如下的即可

 - job_name: 'ingress-nginx-endpoints'
      kubernetes_sd_configs:
      - role: pod
        namespaces:
          names:
          - ingress-nginx
      relabel_configs:
      - source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_scrape]
        action: keep
        regex: true
      - source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_scheme]
        action: replace
        target_label: __scheme__
        regex: (https?)
      - 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
        target_label: __address__
        regex: ([^:]+)(?::\d+)?;(\d+)
        replacement: $1:$2
      - source_labels: [__meta_kubernetes_service_name]
        regex: prometheus
        action: drop
    - job_name: kubernetes-node-exporter
      scrape_interval: 30s
      scrape_timeout: 10s
      metrics_path: /metrics
      scheme: http
      bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token
      tls_config:
        ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
      kubernetes_sd_configs:
      - role: endpoints
      relabel_configs:
      - source_labels: [__meta_kubernetes_service_label_k8s_app]
        separator: ;
        regex: node-exporter
        replacement: $1
        action: keep
      - source_labels: [__meta_kubernetes_endpoint_port_name]
        separator: ;
        regex: http
        replacement: $1
        action: keep
      - source_labels: [__meta_kubernetes_endpoint_address_target_kind, __meta_kubernetes_endpoint_address_target_name]
        separator: ;
        regex: Node;(.*)
        target_label: node
        replacement: ${1}
        action: replace
      - source_labels: [__meta_kubernetes_endpoint_address_target_kind, __meta_kubernetes_endpoint_address_target_name]
        separator: ;
        regex: Pod;(.*)
        target_label: pod
        replacement: ${1}
        action: replace
      - source_labels: [__meta_kubernetes_namespace]
        separator: ;
        regex: (.*)
        target_label: namespace
        replacement: $1
        action: replace
      - source_labels: [__meta_kubernetes_service_name]
        separator: ;
        regex: (.*)
        target_label: service
        replacement: $1
        action: replace
      - source_labels: [__meta_kubernetes_pod_name]
        separator: ;
        regex: (.*)
        target_label: pod
        replacement: $1
        action: replace
      - source_labels: [__meta_kubernetes_service_name]
        separator: ;
        regex: (.*)
        target_label: job
        replacement: ${1}
        action: replace
      - source_labels: [__meta_kubernetes_service_label_k8s_app]
        separator: ;
        regex: (.+)
        target_label: job
        replacement: ${1}
        action: replace
      - source_labels: [__meta_kubernetes_pod_node_name]
        separator: ;
        regex: (.*)
        target_label: node_hostname
        replacement: ${1}
        action: replace
      - source_labels: [__meta_kubernetes_pod_node_ip]
        separator: ;
        regex: (.*)
        target_label: node_ip
        replacement: ${1}
        action: replace