When casting a session, the "kasm_url" parameter is not passed as an environment variable.

[AlaBouali]

Existing Resources

• Please search the existing issues for related problems
• Consult the product documentation : Docs
• Consult the FAQ : FAQ
• Consult the Troubleshooting Guide : Guide
• Reviewed existing training videos: Youtube

Describe the bug

I am trying to pass the kasm_url parameter while casting a session in Kasm 1.16.1 using the following URL:

https://kasm.example.com/#/cast/?kasm_url=http://url.com

According to the API documentation, the kasm_url parameter should be accessible as an environment variable ($KASM_URL) within the running container for the casted session. However, it is not appearing in the environment variables list in my container.

Steps to Reproduce

Launch Kasm 1.16.1.
Cast a session using #/cast/?kasm_url=http://url.com/.
Inspect the environment variables within the container for KASM_URL.

Expected behavior
KASM_URL should be present in the container’s environment variables.

Actual behavior
KASM_URL does not appear, even though the parameter is sent.

Workspaces Version
kasm version: 1.16.1

Workspaces Installation Method
docker

What I’ve Tried

• Verified that the parameter (kasm_url) is indeed being sent to the server.
• Consulted the Kasm Developer API docs but have not found a working solution.
• Looked for relevant environment variable settings within the container but could not see KASM_URL.

Any guidance, advice, or workaround would be greatly appreciated. If I’m missing a step or if there’s an updated setting that needs to be enabled, please let me know. Thank you in advance for your help!

Thank you!