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‫So now let's talk about a way

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‫to perform canary deployments on your API gateway.

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‫So the idea is that you want to enable

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‫a way to test a small amount of traffic

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‫on the change you have done on your API gateway.

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‫So usually it's done in production.

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‫So you would choose the amount of percent of traffic

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‫that the canary channel will receive

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‫and this would allow you to test your new version,

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‫for example of your API gateway,

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‫over the backend Lambda function or something like this.

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‫So say our prod stage currently points to version one

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‫and our client wants to be able to test a new version.

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‫So we're going to create a prod stage canary for version two

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‫and what this will do is that we will be allowing our client

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‫to have for example 95% of the traffic

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‫that goes to the existing prod stage which we know works

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‫and behind the scenes automatically

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‫5% of the traffic will go to the canary stage.

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‫From this, we can test all the changes,

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‫look at metrics, look at logs, look at everything,

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‫maybe debug see if everything is working,

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‫and when we're confident,

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‫we can just move over 100% of the traffic

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‫into your canary stage.

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‫So in this example,

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‫the metrics and the logs will be separate,

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‫so this is for better monitoring.

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‫And you can override any stage variables you wanted

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‫for your canary stage and this is equivalent of performing

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‫blue/green deployment with Lambda and API gateway.

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‫So let's go into hands-on to see how that works.