When using Lambda, retrieve your secrets outside the handler method and reuse them on subsequent invocations. AWS offers a Java and JDBC caching library which caches secrets for 1 hour, which is good guidance if you use another language. It’s recommended that you cache secrets where possible. It’s important to note that this is per secret not per secret version, so rotating and storing previous versions will not cost extra.Įvery 10,000 API calls will cost you $0.05. There is a 30-day free trial period when you first start using Secrets Manager, so there’s no reason not to give it a go.Īfter that, you’ll pay $0.40 per secret per month. However, Secrets Manager will eventually delete versions without labels. įollowing the call to UpdateSecretVersionStage, our example secret will look like this:Īaaaaaaaaaaaaaaaaaaaaaaa will not appear in the DescribeSecret response, but can still be read. Secrets Manager then invokes your Lambda function with the following input. To make things simpler, we’ll use bbbbbbbbbbbbbbbbbbbbbbbb. When Secrets Manager decides its time to rotate your secret, it generates a new version ID, a UUID like bdb9c291-afa2–4435–822b-6240dc732caf. In the Secrets Manager console, click Store a new secret on the right. Let’s walk through a simple example to store an OAuth access token and refresh token. Humans are visual creatures, so I’ll show you how to do it with the console. You can create secrets using the CLI, API, CloudFormation, or the console. Since we didn’t, the default version with the AWSCURRENT label was returned. Secrets Manager would have returned the value of the version with the given ID or stage label. In the GetSecretValue example at the top of this post, we could have additionally passed in either VersionId or VersionStage. Another way to look at it is that each stage can only have one version at a time. Therefore, when you create a new secret, Secrets Manager automatically creates a version and gives it the AWSCURRENT label.Įach version can have up to 20 labels, but only one version can have each label at a time. In fact, it’s the versions that contain the value and not the secret itself.Ī secret must have at least one version, and one of its versions must have the AWSCURRENT staging label. A secret can have one or more versions, each of which contains a secret value.
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