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How does AppConfig service figure out the targets for a deployment?

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Hi,
We are looking into using appconfig for our runtime configuration. From the user guide, it is not clear how to set the targets for an environment. If the targets setting is not required, how does the deployment know how many hosts to deploy for each step? For each step, according to the strategy, there are number of targets will get deployed, how does the appconfig service decide which hosts (client ids) to deploy?

Thanks!

asked 2 years ago109 views
3 Answers
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Thanks. That's very helpful. Is it possible that the same clientId might be assigned to a different percentage bucket in different deployments even for the same deployment strategy?

answered 2 years ago
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Targets are defined dynamically by the unique ClientId parameter used to call the GetConfiguration API (https://docs.aws.amazon.com/appconfig/2019-10-09/APIReference/API_GetConfiguration.html).

During a deployment, we probabilistically assign the ClientId to a percentage bucket, 0-99. When the percentage complete for a deployment passes the percentage bucket the ClientId was assigned, it receives the new deployment.

For example, say you use a linear deployment strategy with a deployment duration of 5 minutes and a growth factor of 10. If you have 100 targets, then roughly 10 targets will receive the new deployment every 30 second interval.

answered 2 years ago
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We don't make any guarantees about when a specific target will receive a deployment. The behavior will be stable within a deployment, but you shouldn't make any assumptions that ordering in one deployment will be similar in the next.

answered 2 years ago

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