Stackdriver debugger demo

See this screenrecording on YouTube for the demo:

Setup

Create a cluster and connect to it:

gcloud container clusters create code-cooking --scopes https://www.googleapis.com/auth/cloud_debugger --num-nodes=1 --project=code-cooking

gcloud container clusters get-credentials code-cooking --zone europe-west1-d --project code-cooking

Generate source context files (do this before each docker build):

gcloud beta debug source gen-repo-info-file

Build and push the Docker container:

docker build -t eu.gcr.io/code-cooking/debugging-demo:0.4 .

gcloud docker -- push eu.gcr.io/code-cooking/debugging-demo:0.4

Deploy to Kubernetes:

kubectl apply -f k8s

Debug:

open https://console.cloud.google.com/debug?project=code-cooking

Demo script

• What is it

  • Live debugging of applications without interruption
  • Adding logs to running applications

• How does it work

  • app.js
  • Dockerfile
  • source-context
  • deployment.yaml

• Deploy version 4

• Snapshot

  • req
  • req.headers

• Log

  • req.headers

• Why cool

  • reduces debug time
  • much faster than typical add logs -> deploy -> add logs -> deploy cycle
  • tradeoff signal versus noise in logging