Each Watchbot stack will write all its logs to a single CloudWatch LogGroup. The awscli or cwlogs are a couple of tools that can be used to view log events in a LogGroup.
If your host EC2s are not built from ECS-optimized
AMIs,
make sure that the awslogs driver is enabled on the ecs-agent by setting the
following agent configuration:
ECS_AVAILABLE_LOGGING_DRIVERS=["json-file","awslogs"]
See the AWS documentation for more information.
Custom metrics are collected under the namespace Mapbox/ecs-watchbot. They are
mined via filters on CloudWatch logs, and can help you learn about the state of
your Watchbot stack. Each custom metric is suffixed with your stack's name,
e.g. -MyWatchbotStack.
| Metric | Description | Statistics |
|---|---|---|
| WorkerErrors | The total number of failed workers per minute. High levels of this error trigger the WorkerErrors alarm |
Sum |
| MessageReceives | A metric collected for every received message that indicates how many times the message has been pulled from the queue | Maximum |
| WorkerDuration | The amount of time (msec) taken by a worker to run a task | Average, Minimum and Maximum |
| ResponseDuration | The approximate time (msec) taken to service a message: sum of queue waiting time and worker duration | Average, Minimum and Maximum |