Use the tracepusher Kubernetes Operator to automatically generate OpenTelemetry traces for Kubernetes Job and CronJob resources.
Step 0: Create a cluster & Start Jaeger
If you don't already have a cluster, create one now:
kind create cluster
# Or install jaeger on Kubernetes with the jaeger operator
# https://www.jaegertracing.io/docs/1.53/operator/
docker run --rm --name jaeger \
-e COLLECTOR_ZIPKIN_HOST_PORT=:9411 \
-p 6831:6831/udp \
-p 6832:6832/udp \
-p 5778:5778 \
-p 16686:16686 \
-p 4317:4317 \
-p 4318:4318 \
-p 14250:14250 \
-p 14268:14268 \
-p 14269:14269 \
-p 9411:9411 \
jaegertracing/all-in-one:1.53
Step 1: Install tracepusher Custom Resource Definitions on cluster
kubectl apply -f https://raw.githubusercontent.com/agardnerIT/tracepusher/main/operator/crds.yml
Step 2: Create a JobTracer
Modify the OpenTelemetry collector URL as appropriate for your setup and then apply the file. One JobTracer per namespace please!
This file instructs tracepusher to monitor for all Job resources in the given namespace (you can ignore on a job-by-job basis with annotations that you'll see next):
cat <<EOF | kubectl create -f -
---
apiVersion: tracers.tracepusher.github.io/v1
kind: JobTracer
metadata:
name: tracer
namespace: default
spec:
# Specify your OpenTelemetry collector endpoint
# Here I've given the docker URI
collectorEndpoint: "http://host.docker.internal:4318"
EOF
Step 3: Create a Normal k8s Job / CronJob
Create a Job / CronJob as normal. The tracepusher annotations are optional and will override the behaviour of the above JobTracer
cat <<EOF | kubectl create -f -
---
apiVersion: batch/v1
kind: Job
metadata:
name: pi
namespace: default
#annotations:
# tracepusher/ignore: "true"
# tracepusher/collector: "http://example.com:4318"
spec:
template:
spec:
containers:
- name: pi
image: perl:5.34.0
command: ["perl", "-Mbignum=bpi", "-wle", "print bpi(2000)"]
restartPolicy: Never
backoffLimit: 0
EOF
