However if you don't need the features of secrets manager you may be paying for more than you actually require, this is the most expensive option of all three.Ī large number of free, public API keys. The biggest advantage to secrets manager over SSM parameter store is its integrations with other AWS services allowing features such as secret rotation. The SDK will handle the retrieval of these values but you must be aware just like SSM you will take a performance hit so you'll want to take a look at a similar solution as the parameter store. Using this option a lot of the management is built into the service, a secret can contain either a string or a single line JSON object. For a database this would mean either creating individual parameters or storing the entire credential set as JSON object and decoding after you retrieve it. You will need an individual parameter per each key/value.There will be a hit to performance for retrieving the value everytime, to reduce this call the function in the global context so that it can be reused between invocations.Unlike environment variables you can use the value across multiple Lambda functions.īy using this option you would need to be aware of the following: It costs nothing to store the values, but the price is $0.05 per 10,000 Parameter Store API interactions.
It provides basic functionality but if that is all you need then it will work great. It can store both plain text values as well encrypted strings (the SecureString type). Using this option you would use the SDK to retrieve any key/values that you want. Values are attached to an individual Lambda function, if the keys are used by multiple you will need to pass to each function individually.
If you use versioning for your Lambda function the values are fixed, you would need to deploy a new version of the Lambda function to make changes.
#Secrets manager cost code#
This will provide the best performance out of any options (there's no additional lookup in the code runtime).īy using this option be aware of the following pitfalls: You can prevent others accessing the string values by controlling their permissions to KMS via IAM. These will be passed into the Lambda function directly via the Lambda Service. For storing any credentials you have three AWS managed choices:
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