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feat(lambda): add isOffsetLag prop for alarms/dashboards for OffsetLag metric #574

Merged

echeung-amzn merged 1 commit into cdklabs:main from connorkoch:main

Sep 18, 2024

+695 −242

Commits on Sep 17, 2024

feat(lambda): add isOffsetLag prop and add support for generating an …

…alarm and widget for the Lambda OffsetLag metric

Lambda has added support for connecting to Kafka streams via Event Source Mappings (see: https://docs.aws.amazon.com/lambda/latest/dg/with-msk.html). This comes with the addition of a new CW metric under the AWS/Lambda namespace, `OffsetLag` (see: https://aws.amazon.com/blogs/compute/offset-lag-metric-for-amazon-msk-as-an-event-source-for-lambda/). This metric is different than the existing IteratorAge metric used for Kinesis streams. OffsetLag represents the difference between the last record written to a Kafka topic and the last record that the function's consumer group has processed (note the metric is in # of records, it's not a time metric). See here: https://docs.aws.amazon.com/lambda/latest/dg/monitoring-metrics.html.

Defaulted the monitor to `false` since it's a new prop and is not widely used.

Connor Koch authored and Connor Koch committed Sep 17, 2024