failed to register layer: lsetxattr security.capability /app/upsnap: operation not supported

[williamcanon1]

I encountered this error when running upsnap version 4 or above on OpenWrt Docker, but it didn't occur on Armbian with the same architecture. Now, I've installed version 3.3.2 on OpenWrt, and it runs well.

[seriousm4x]

Might be an issue with the underlying file system which doesn't support some file attributes? What's the file system you are using?

[williamcanon1]

Due to a power outage during operation, the OpenWRT system may become read-only. The installed system version is (SQUASHFS)

[seriousm4x]

It might be this line in the Dockerfile right here. The binary needs to have capabillities to send raw network packets.

The installed system version is (SQUASHFS)

As far as I know squashfs is read only? In this context, the error would make sense if Docker tries to modify the binary, but the file system is read only.

[williamcanon1]

failed to register layer: lsetxattr security.capability /app/upsnap: operation not supported

ChatGPT
The error message you're encountering suggests that there is a problem with registering a layer in a container environment, specifically involving setting an extended attribute (xattr) related to security capabilities.

Here are a few things you might consider troubleshooting:

Permissions: Ensure that the user attempting to set the extended attribute has the necessary permissions to do so. You may need root or elevated privileges depending on the context.

Kernel Support: Extended attributes and security capabilities may require specific kernel support. Ensure that your kernel supports the required features.

Container Configuration: If you're working within a container environment (which seems to be the case based on the error message), make sure the container runtime and its configuration allow setting extended attributes. Some container runtimes may restrict certain operations for security reasons.

Applicability: Verify if setting extended attributes with security capabilities is necessary for your application. If not, you might be able to work around the issue by modifying your application or environment configuration.

Error Context: Understand the context in which this error occurs. What action triggered this error message? This might provide additional clues to diagnose and resolve the issue.

Update Software: Ensure that your system, container runtime, and any relevant software are up to date. Sometimes, issues like this can be resolved by updating to the latest versions where bugs might have been fixed.

Community Support: If you're using a specific software or platform that's related to this error, consider searching online forums or community channels for others who might have encountered similar issues. They might provide insights or workarounds.

Debugging Tools: Utilize debugging tools available for your environment to gather more information about the error. This might include examining logs, using debugging flags, or tracing system calls.

Consult Documentation: Check the documentation of the software you're using, including container runtimes and any related libraries or tools. They may provide specific guidance on handling this type of error.

By carefully investigating these aspects, you should be able to diagnose and resolve the issue related to registering layers and setting extended attributes within your container environment.