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akash1810
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Oct 26, 2026
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LGTM. Let's get final approval from @guardian/dotcom-platform though.
| @@ -254,8 +254,8 @@ export const InteractiveRenderingPropsPROD: RenderingCDKStackProps = { | |||
| }, | |||
| // Route 100% traffic to EC2. | |||
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Suggested change
| // Route 100% traffic to EC2. | |
| // Route 99% traffic to EC2, 1% to ECS. |
arelra
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Oct 26, 2026
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What does this change?
At present, all Interactives PROD traffic is routed to the EC2 service. This PR will send 1% of traffic to the new ECS service, leaving 99% on EC2.
Why?
We expect no difference between the two. If the metrics confirm that nothing changes, we will have increased confidence and roll forward to 10%. If we can detect any change, we will roll back to 100% EC2.
How has this change been tested?
Simple tests have been run which make requests to both services and compare the results, excluding the X-Gu-Target-Group response header and a few server timestamps. Responses have been found to be identical. As the comparison includes the commit hash, we have a high degree of confidence that the services' codebases are identical.
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