moio/rancher_pprof.md

## rancher_pprof.md

      
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              rancher_pprof.md
            
          
    Explore a Rancher pprof CPU profile

Grab a kubeconfig file pointing to the Rancher upstream cluster, then copypaste:
export KUBECONFIG=/path/to/the/upstream_cluster.yaml

for pod in $(kubectl get pods -n cattle-system --no-headers -l app=rancher | cut -d ' ' -f1); do
  echo Collecting 30s worth of profile data for $pod...
  kubectl exec -n cattle-system $pod -- curl -s http://localhost:6060/debug/pprof/profile -o profile
  kubectl cp cattle-system/${pod}:profile ./${pod}-profile
  echo saved ${pod}-profile
done

echo Opening browser on ${pod}-profile...
go tool pprof -http=: ./${pod}-profile
Example: