Open Telemetry ALS

This sample demonstrates Istio's Open Telemetry ALS support.

Start otel-collector service

First, create an otel-collector backend with simple configuration.

kubectl apply -f otel.yaml

With following configuration, otel-collector will create a grpc receiver on port 4317, and output to stdout. You can find more details form here.

receivers:
  otlp:
    protocols:
      grpc:
      http:
processors:
  batch:
exporters:
  logging:
    loglevel: debug
service:
  pipelines:
    logs:
      receivers: [otlp]
      processors: [batch]
      exporters: [logging]

Update istio configmap

Run the following script to update the istio with demo profile:

istioctl install --set profile=demo -y

Next, add a Telemetry resource that tells Istio to send access logs to the OpenTelemetry collector.

cat <<EOF | kubectl apply -n istio-system -f -
apiVersion: telemetry.istio.io/v1alpha1
kind: Telemetry
metadata:
  name: mesh-default
  namespace: istio-system
spec:
  accessLogging:
    - providers:
      - name: otel
EOF

Check ALS output

Following doc, start the fortio and httpbin services.

Run the following script to request httpbin from fortio .

kubectl exec -it $(kubectl get po | grep fortio | awk '{print $1}') -- fortio curl httpbin:8000/ip

Run the following script to checkout ALS output.

kubectl logs $(kubectl get po -n istio-system | grep otel | awk '{print $1}') -n istio-system

Cleanup

kubectl delete -f otel.yaml
kubectl delete telemetry mesh-default -nistio-system