CANARY DEPLOYMENTS

[fmugambi]

Hello Team,

Please help here. Not sure between C & D.

Your team has some new functionality that they want to roll out slowly so they can monitor for errors. The
change contains some significant changes to the user interface. You've chosen to use traffic splitting to
perform a canary deployment.
You're going to start by rolling out the code to 15% of your users. How should you go about setting up
traffic splitting?
A. Deploy the new version. Split the traffic using an IP or cookie based distribution.
B. Use the gcloud app deploy command with the distribution flag to deploy and split the traffic in one
command.
C. Deploy the new version using the no-promote flag. Split the traffic using a random distribution.
D. Deploy the new version using the no-promote flag. Split the traffic using distribution.

[ronnelg · Accepted solution]

Hi @fmugambi, 

Letter D is the best approach, as it gives you full control over the deployment process, ensuring that you can control exactly how much traffic is sent to the new version which is 15%.

For the letter C, random distribution might not be as precise as percentage-based distribution for controlling the roll-out.

I hope the above information is helpful.