How do I monitor Kubernetes pod network traffic with Prometheus?
In this guide, we will set up monitoring of Kubernetes pod network traffic using Prometheus with Pulumi. We will deploy Prometheus on a Kubernetes cluster and configure it to scrape metrics from the pods. This involves creating a Kubernetes namespace, deploying Prometheus, and setting up the necessary configurations.
import * as pulumi from "@pulumi/pulumi";
import * as k8s from "@pulumi/kubernetes";
// Create a Kubernetes namespace for monitoring
const monitoringNamespace = new k8s.core.v1.Namespace("monitoring", {
metadata: { name: "monitoring" },
});
// Define Prometheus deployment
const prometheusDeployment = new k8s.apps.v1.Deployment("prometheus", {
metadata: {
namespace: monitoringNamespace.metadata.name,
name: "prometheus",
},
spec: {
replicas: 1,
selector: {
matchLabels: { app: "prometheus" },
},
template: {
metadata: {
labels: { app: "prometheus" },
},
spec: {
containers: [{
name: "prometheus",
image: "prom/prometheus:v2.26.0",
ports: [{ containerPort: 9090 }],
volumeMounts: [{
name: "config-volume",
mountPath: "/etc/prometheus",
}],
}],
volumes: [{
name: "config-volume",
configMap: {
name: "prometheus-config",
},
}],
},
},
},
});
// Define Prometheus service
const prometheusService = new k8s.core.v1.Service("prometheus", {
metadata: {
namespace: monitoringNamespace.metadata.name,
name: "prometheus",
},
spec: {
selector: { app: "prometheus" },
ports: [{
port: 9090,
targetPort: 9090,
protocol: "TCP",
}],
},
});
// Create a ConfigMap for Prometheus configuration
const prometheusConfigMap = new k8s.core.v1.ConfigMap("prometheus-config", {
metadata: {
namespace: monitoringNamespace.metadata.name,
name: "prometheus-config",
},
data: {
"prometheus.yml": `
global:
scrape_interval: 15s
scrape_configs:
- job_name: 'kubernetes-pods'
kubernetes_sd_configs:
- role: pod
relabel_configs:
- source_labels: [__meta_kubernetes_pod_label_app]
action: keep
regex: .*
`,
},
});
// Export the Prometheus service URL
export const prometheusServiceUrl = prometheusService.status.loadBalancer.ingress[0].hostname;
Key Points
- Created a Kubernetes namespace for monitoring resources.
- Deployed Prometheus using a Kubernetes Deployment.
- Exposed Prometheus via a Kubernetes Service.
- Configured Prometheus to scrape metrics from Kubernetes pods using a ConfigMap.
Summary
In this guide, we successfully set up monitoring of Kubernetes pod network traffic using Prometheus with Pulumi. We created the necessary Kubernetes resources, including a namespace, deployment, service, and configuration, to deploy and configure Prometheus for monitoring pod metrics.
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