July 7th, 2025
New
Checkly Agent
The latest minor release of the Checkly Agent is here, bringing support for Playwright check suites, and a handful of performance, observability and security improvements. improvements. This changelog includes all updates from version 6.0.1 to 6.1.0
Runtimes
Supports both
2024.09and2025.04runtimes on private locations.
Playwright check suites now supported (beta)
You can now run Playwright check suites (Beta) in private locations (along with all 22 public locations)
Dependency caching is available to speed up runs:
Disabled by default with:
DEPENDENCY_CACHE=OFFEnable caching with:
DEPENDENCY_CACHE=CHECKLY_S3Want a custom cache backend? Please let us know; we’d love to hear about your use case.
Improved secret scrubbing file handling.
Node.js is now bundled with the agent and used during check runs - no more pulling it from the public internet. It’s safer, faster, and more predictable.
cURL proxy environment variables are now supported, including both
HTTPS_PROXYandALL_PROXY.
Improved debugging and logging
Set the environment variable
DEBUG=checkly:*to output detailed internal command logs. ⚠️ Use with caution, these logs may expose secrets into your agent logs.The automatic RAM check that previously caused the message
Your check run has reached the maximum memory usage of 2.97 GiB.is now disabled by default.To re-enable, set the environment variable:
ENABLE_MEMORY_MANAGEMENT: true, which will set it up to a 95% of your containers’ memory limit:/sys/fs/cgroup/memory.max
Baseline agent image improvements
Now supports runs from arbitrary user IDs, ideal for teams enforcing specific UIDs for security compliance.
Docker image size reduced from 2.24GB to 1.42GB (compressed). For faster Docker/K8s pulls and lighter deployments.
All known npm vulnerabilities have been patched.
Artifact upload is now more fault-tolerant, with built-in retries to improve resilience.
Update the agent to get all the latest features into your private locations.
We’d love to hear how you and your team get on. Share your feedback in the developer hub in Slack, opening a support chat, or connect with your Solutions Engineer!
Happy monitoring!
May 9th, 2025
New
Checkly Agent
We have released major version 6.0.0 of the Checkly agent to support runtimes 2024.09 and 2025.04 on private locations.
This release also includes several bug fixes and smaller improvements, and we recommend upgrading to use the latest runtime and agent to get the best Checkly experience possible.
Detailed changes:
New: Support for runtimes
2024.09and2025.04. For the full runtime specifications, see our docsFix: Remove runtime requirement for TCP checks
Fix: Added restrictions on the worker user to improve security
Fix: Change write location for test files to fix
Error: ENOENT: no such file or directoryissue.
Read all about updating the agent here.
Happy monitoring!
Questions or feedback? Join our Slack community.
April 30th, 2025
New
Checkly Agent
We have released major version 5.0.0 of the Checkly agent to support runtime 2025.04 on private locations.
Runtime 2025.04 uses Playwright 1.51.1 and Node.js v22.11.0, and include updates to a number of the supported libraries. For the full runtime specifications see our docs.
This release also includes a number of bug fixes and smaller improvements and we recommend upgrading to use the latest runtime and agent to get the best Checkly experience possible.
Detailed changes:
New: Support for runtime
2025.04andNode.js v22.11.0New: Support for
fetch(Node.js documentation)Fix: Allow empty password for simple authentication
Fix: Proper OOM handling for better check error reporting
Fix: Improved garbage collection for better memory utilization
Fix: Pins the Chrome version used to
131.0.6778.69for increased stabilityFix: Support for OS-level DNS resolution in TCP checks via USE_OS_DNS_RESOLVER environment variable
As each Checkly agent only supports a single runtime, we recommend pinning the version that supports the runtime you need when using private locations in production. Read all about updating the agent here.
Happy monitoring!
Questions or feedback? Join our Slack community.
November 7th, 2024
Improved
Checkly Agent
We have released major version 4.0.0 of the Checkly agent to support beta runtime 2024.09 on private locations.
To use beta runtimes, go to the labs section in Checkly and enable ‘Beta runtimes’. For more information on runtime 2024.09 see this changelog entry.
As each Checkly agent only supports a single runtime, we recommend pinning the version that supports the runtime you need when using private locations in production. Read all about updating the agent here.
You can find more information on private locations and Checkly agents in our documentation.
Happy monitoring!
August 3rd, 2023
New
Checkly Agent
Next Friday 11 August at 12:00 CET, we will release a new major version of the Checkly Agent to run on your Private Locations. This major version introduces some breaking changes which is why we pre-announce this so users can take action on possibly auto-updating clusters running the agent:
The agent now supports ARM64 architectures. This means you can now run your Private Locations on your M1/M2 MacBook or other ARM Linux flavours etc.
Only Checkly runtime 2023.02 is included. This allows us to keep the container image at an acceptable size.
Because agent V2.0.0 only includes runtime 2023.02, Puppeteer is no longer supported. If your checks rely on Puppeteer, please keep using one of the older versions of the agent.
All Chromium & Chrome versions are now aligned with the recommend Playwright version. Chromium: 112.0.5615.29. Chrome: 115.0.5790.110 (Not supported on ARM64)
Again, this new image will be pushed to our Docker Hub on Friday 11 August at 12:00 CET
Tip: Running on Kubernetes? Check our dedicated docs for deploying the agent to your cluster.