Troubleshooting & Debugging Production Microservices in Kubernetes as presented in Devoxx 2017

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Debugging applications in production is like being the detective in a crime movie. Especially with microservices. Especially with containers. Especially in the cloud. Trying to see what’s going on in a production deployment at scale is impossible without proper tools! Google has spent over a decade deploying containerized Java applications at unprecedented scale and the infrastructure and tools developed by Google have made it uniquely possible to manage, troubleshoot, and debug, at scale. Join this session to see how you can diagnose and troubleshoot production issues w/ out of the box Kubernetes tools, as well as getting insight from the ecosystem with Weave Scope, JFrog Artifactory & Stackdriver tools.

Technologie

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Debugging & Troubleshooting Microservices
w/ Kubernetes
It runs in production, or is it?

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Ray Tsang
Developer Advocate
Google Cloud Platform
@saturnism | +RayTsang

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Baruch
Sadogursky
Developer Advocate
JFrog
@jbaruch

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Shownotes!
● jfrog.com/shownotes
○ Slides
○ Video (tomorrow)
○ Links
○ Feedback
○ Raffle

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Hello World
Service - Greet
Guestbook
Service - Create
Guestbook Service -
Retrieve

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Guestbook
UI
Hello World
Service
Redis
session replication
greeting
MySQL
Guestbook
Service
CRUD

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Visibility & Insight is Key

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Let's see it!

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Repository metadata - key insight into
artifacts and their relationships

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Production vs Non-Production :(

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Distributed Systems are hard!

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
We've been there, done that

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Information - Logs!
kubectl logs -f pod_id

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Inspecting the process / container
kubectl exec -ti pod_id /bin/bash

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Port forward to container
kubectl port-forward pod_id local_port:remote_port

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Isolate problematic instance w/ Labels
kubectl label pod pod_id --overewrite serving=false

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Pod
frontend
Pod
serving = true
version = 1.0
Pod
serving = true
version = 1.0
Service
Label selectors:
version = 1.0
serving = true
Pod
serving = true
version = 1.0

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Log aggregation, at scale

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Stackdriver Logging
https://cloud.google.com/logging/

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Metrics from Logs → Alerting
Near-realtime insight

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Search and Query Your Logs

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Export to BigQuery, Storage, Pub/Sub
Near-realtime insight

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Tracing at Google - Dapper
https://research.google.com/pubs/pub36356.html

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Zipkin

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Stackdriver Trace
https://cloud.google.com/trace/

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Zipkin → Stackdriver Trace
https://cloud.google.com/trace/docs/zipkin

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Automatic reports
Detect performance regression

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Oops… I forgot a log message. Darn!

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Don't you wish you can use a debugger?

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Stackdriver Debugger - Production Debugger
https://cloud.google.com/debugger/

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Add debugger agent
java -agentpath:/opt/cdbg/cdbg_java_agent.so ... -jar PATH_TO_JAR_FILE

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Logpoint - dynamically add log messages!
No redeployment, Magic.
gcloud debug logpoints create HelloworldService.java:35
"Received endpoint: {endpoint}/{name}" --target helloworld-ui-1.0-SNAPSHOT

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Snapshots
Inspect call stack and variables

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Trace
Log
Debug

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Trace → Stackdriver Trace
Logs → Stackdriver Logging
Debug → Stackdriver Debugger
https://cloud.google.com/stackdriver/

@saturnism @jbaruch @jfrog @googlecloud #devoxx2017 jfrog.com/shownotes
Thanks!
Source: https://github.com/saturnism/spring-boot-docker
Shownotes: https://jfrog.com/shownotes
Stackdriver: https://cloud.google.com/stackdriver/
Ray Tsang
@saturnism
Google Cloud Platform
Baruch Sadogursky
@jbaruch
JFrog

@saturnism @googlecloud #kubernetes #devoxx

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