feat(runners): Add CloudWatch agent for log shipping on all self-hosted runners#1105
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…ed runners
Install and configure the CloudWatch agent on macOS, Windows, and Linux
self-hosted runners to ship system logs and runner diagnostics to
CloudWatch Logs. This enables diagnosis of runner failures (e.g.
ConnectionLost) without requiring SSH access to the instance.
Logs shipped:
- macOS: /var/log/system.log, runner diag, setup-runner.log
- Windows: Runner diag, UserData.log, StartupScript.log
- Linux: /var/log/messages, runner diag, setup-runner.log
Log groups: /ec2/runners/{repo}/{arch}-{version}
Retention: 30 days
Also adds CloudWatchAgentServerPolicy to the runner IAM role.
Signed-off-by: ayush-panta <ayushkp@amazon.com>
KlwntSingh
approved these changes
Jun 16, 2026
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Description of changes: Add CloudWatch agent to all self-hosted runners (macOS, Windows, Linux) to ship system logs and runner diagnostics to CloudWatch Logs. This enables diagnosis of runner failures (e.g.,
ConnectionLost) without requiring SSH/SSM access to the instance.Logs are available in the account associated with the runner, following a
/ec2/runners/{repo}/{arch}-{version}format for log group and{instance-id}/{log-name}for individual log stream. Logs are retained for 30 days.Testing done: Validated on live instances in prod (
090529234398, us-west-2) via SSM. All agents started successfully. Log delivery fails only on IAM permissions (this is expected, asCloudWatchAgentServerPolicynot yet attached to live role until this deploys). CDK build and unit tests also pass.License Acceptance
By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.