You want to roll back your Cloud Run service web-app to a previous revision web-app-00003 safely without downtime. Which sequence of commands achieves this?
hard📝 Best Practice Q15 of 15
GCP - Cloud Run
You want to roll back your Cloud Run service web-app to a previous revision web-app-00003 safely without downtime. Which sequence of commands achieves this?
Agcloud run deploy web-app --image=web-app-00003
Bgcloud run services update web-app --revision web-app-00003
Cgcloud run revisions delete web-app-00004 && gcloud run services update-traffic web-app --to-revisions web-app-00003=100
Dgcloud run services update-traffic web-app --to-revisions web-app-00003=100
Step-by-Step Solution
Solution:
Step 1: Understand rollback via traffic routing
Rolling back means routing traffic back to an existing previous revision.
Step 2: Use traffic update command
Use gcloud run services update-traffic to send 100% traffic to the old revision.
Step 3: Avoid deleting revisions or redeploying
Deleting or redeploying is unnecessary and may cause downtime.
Final Answer:
gcloud run services update-traffic web-app --to-revisions web-app-00003=100 -> Option D
Quick Check:
Rollback by routing traffic to old revision [OK]
Quick Trick:Rollback by updating traffic to old revision, no redeploy needed [OK]
Common Mistakes:
Trying to redeploy old revision as image
Deleting newer revisions unnecessarily
Using wrong commands to update revision
Master "Cloud Run" in GCP
9 interactive learning modes - each teaches the same concept differently
