Lambda function gives error due to less space

[jyoti-lp]

Team, I have installed the setup via cloud formation. One of my image is 14Gb, the lambda function is unable to create index due to space issue and I am unable to increase ephemeral storage for lambda beyond 10 GB

2025/09/24 17:19:59
{
"errorMessage": "failed to convert OCI index: errors encountered while building soci layers; write /tmp/tmp.3215688619: no space left on device",
"errorType": "wrapError"
}

What is the alternate approach

[swagatbora90]

Hi @jyoti-lp, thanks for reaching out. Unfortunately, this is a known limitation of the SOCI Index Builder solution.

The alternate approach for now is to build the indexes locally or on your CI hosts for the larger images. There are multiple tools available that can help you build both v1 and v2 soci indexes. Most common is to use the official soci cli tool available in the https://github.com/awslabs/soci-snapshotter repository. You can follow the instructions here to install soci cli and dependencies.

We also have this guide on how to convert and push a converted image to the registry, using soci and nerdctl.