hostmetrics

Host Metrics Collection

Demonstrates collecting system metrics from Kubernetes nodes using OpenTelemetry Collector's hostmetrics receiver.

What it does

• Creates a 2-node Kind cluster
• Deploys OpenTelemetry Collector as a DaemonSet on all nodes
• Collects host metrics (CPU, memory, disk, network, etc.)
• Exports metrics to Dash0

Prerequisites

• Docker
• Kind
• kubectl
• Helm 3

Setup

1. Configure your Dash0 credentials in ../.env (copy from ../.env.template)

2. Run the demo:

   ./00_run.sh

Metrics Collected

The hostmetrics receiver collects:

• CPU (utilization, time per state)
• Memory (usage, available, utilization)
• Disk I/O (operations, bytes read/written)
• Filesystem (usage, utilization)
• Network (packets, bytes, errors, drops)
• System load
• Paging/swap statistics
• Process information

View Logs

kubectl logs -n opentelemetry -l app.kubernetes.io/name=opentelemetry-collector --tail=50 -f

Cleanup

./01_cleanup.sh