Ingress Nginx (Prometheus)¶

Information about Ingress Nginx (Prometheus) was collected, including average CPU usage, average memory usage, network request/response totals, number of Ingress Config loads, results of the last Ingress Config load, and success rate of Ingress transfer.

Configuration¶

Preconditions¶

• Install DataKit: Log in Guance Console and click "Integration" - "DataKit" - "Kubernetes"

Note: The sample Ingress version is willdockerhub/ingress-nginx-controller:v1.0.0 (deployment of kubeadmin in a CentOS environment), and the metrics for different versions may differ.

Metric Collection¶

• Get the yaml file for deploying Ingress

wget https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.0.0/deploy/static/provider/baremetal/deploy.yaml

• Edit deploy.yaml, set the service type to NodePort, and expose 10254 ports externally. Refer to the following figure:

vi deploy.yaml

• Open Input

Observing cloud access to Ingress metrics data requires DataKit to turn on the prom plug-in, specify a URL exporter in the prom plug-in configuration, collect Ingress Controller metrics in the Kubernetes cluster, and recommend adding annotations.
Edit the deploy.yaml file, find the Deployment corresponding to the ingress-nginx-controller image, increase annotations.

annotations:
  datakit/prom.instances: |
    [[inputs.prom]]
      url = "http://$IP:10254/metrics"
      source = "prom-ingress"
      metric_types = ["counter", "gauge"]
      # metric_name_filter = ["cpu"]
      # measurement_prefix = ""
      measurement_name = "prom_ingress"
      interval = "60s"
      tags_ignore = ["build","le","method","release","repository"]
      metric_name_filter = ["nginx_process_cpu_seconds_total","nginx_process_resident_memory_bytes","request_size_sum","response_size_sum","requests","success","config_last_reload_successful"]
      # tags_ignore = ["xxxx"]
      [[inputs.prom.measurements]]
        prefix = "nginx_ingress_controller_"
        name = "prom_ingress"
      [inputs.prom.tags]
      namespace = "$NAMESPACE"

Parameter Description

• url: Exporter urls, multiple URLs separated by commas
• source:Collector Alias
• metric_types: Metric type, optional values are counter, gauge, histogram, summary
• measurement_name:Metric Set Name
• interval: acquisition frequency
• inputs.prom.measurements: Metric set whose prefix is prefix to name
• tags_ignore: Ignored tag

• metric_name_filter:Reserved metric name

• Deploy Ingress

kubectl apply -f deploy.yaml

Metric Details¶

If inputs.prom.measurements is configured, the indices collected by the observation cloud need to be prefixed to match the table.
For example, the prefix nginx*ingress_controller is configured below, and the metric set is prom_ingress.

 [[inputs.prom.measurements]]
              prefix = "nginx_ingress_controller_"
              name = "prom_ingress"

The nginx_ingress_controller_requests metric on the observation cloud is the prom_ingress metric under the metric set requests metric.