Comments (5)
I'd argue that running lambda it each region separately has some advantages:
- kind of HA - if lambda service is down in one region (and we've seen it happen), it doesn't affect the others
- lambda needs to only care about its own region, which keeps its design and configuration simpler
- iterating over stacks in other regions would be slower and affect cost (even though it's negligible)
We've made chaos lambda part of our automated deployments scoped to a region (along with other region-specific resources, such as SNS topics), and it's working quite well.
from chaos-lambda.
It should be doable, but in general it's good to keep each region as independent as possible, avoiding things like configuration changes in one region impacting another.
We've realised that the code is small enough to embed in the CloudFormation template (via the ZipFile property), and combined with a solution for #5, it should make at least the code deployment part pretty quick.
What's the main pain point for you at the moment when setting it up for multiple regions?
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My use case is that I have an application running in 6 regions, and I would prefer to only run and configure it once to work against all those regions, instead of running it in each and every of those regions.
This doesn't need to be the default behavior, I would just like to have this available as a configuration option.
from chaos-lambda.
Another use case I saw yesterday is the support for regions where Lambda is not yet supported, such as California, Brazil or Mumbai.
A multi-region model would allow a Lambda function deployed in Virginia to randomly terminate instances there.
from chaos-lambda.
While we'd still recommend using a different instance of the lambda per region you're right that some regions don't yet support running lambda functions at all, so the latest version should now optionally be able to target ASGs in other regions.
Details are in README.md under the "Regions" heading, but basically: create a regions.txt file in the src/ folder with a newline-separated list of regions, bundle that up with the code (make zip
), upload this to a S3 bucket in the region you want to run the lambda, then create the stack using the lambda.json template rather than lambda_standalone.json.
Slightly convoluted, but there doesn't seem to be a more direct way to trigger a lambda with arbitrary configuration values?
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