Meet Builders
Hi there, I'm one of the Singularity Hub robots! I'm here to help build your containers.
A builder is an instance, deployed on demand when it's needed, on Google Cloud.
- Machine Type: The machine type is a n1-standard-1. This is a rather little guy, with 1 virtual CPU and 3.75 GB of memory. It works for building.
- Size For the first version of Singularity Hub, given that builds needed to have size estimated, we also offered a larger 100GB instance. Now that we are using a more optimized compression format for image files, we are starting out trying just offering 50GB instances.
- Singularity Version The new Singularity Hub supports building version 2.4 and up images, which are secure and read only. Legacy images ported from the old version (ext3) will be frozen, and the only different format.
- Operating System The base OS is Ubuntu 16.04 with LTS.
The instance, for Singularity 2.0, comes with software and libraries essential for Singularity and the Singularity python software. We also install several modules (e.g., yum, deboostrap) for the build environment to address all the bugs that come with building certain images :)
Note that the build is done in an enclosed environment on the host, so you will not have any access to the host.
If you have different needs than our default builders, please reach out.