CODEWITHSUNDEEP
amazon-web-servicesaws-lambda
Lieuwe
Lieuwe

Reputation: 1840

How do I check programatically if an AWS lambda is already running?

I have a lambda and I would like to ensure that there is only one instance of it running at a time.

Is it possible for a lambda (written in python) to check if another instance of that same lambda is already running?

Upvotes: 2

Views: 1094

Answers (1)

Marcin
Marcin

Reputation: 238199

To ensure that no more than 1 instance of your function is running, the easiest way is to set reserved concurrency to one:

Reserved concurrency also limits the maximum concurrency for the function, and applies to the function as a whole, including versions and aliases.

To check if this is actually the case, you can query ConcurrentExecutions metric on your function with By Function Name dimension:

The number of function instances that are processing events.

To do it programmatically, you can use get-metric-data or get-metric-statistics calls.

Upvotes: 4

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