Blue-Green / Canary Deployment
Also written as Blue-Green Deployment, Canary Deployment, Canary Release
Deployment strategies for releasing new code with less risk: blue-green runs two full identical environments and switches traffic all at once; canary rolls the new version out to a small slice of traffic first before going wider.
Think of it like
Blue-green is like flipping a single master switch between two fully-built stage sets; canary is like testing a new recipe on a few tables before putting it on the whole restaurant's menu.
Junior or senior?
Junior sounds like
Says 'we deploy on merge to main' with no rollback plan.
Senior sounds like
Can walk through a canary or blue-green release that actually caught a bad deploy before it hit everyone.
Ask them
“Walk me through what happened the last time a canary or blue-green release caught a bad deploy before it hit everyone.”