Build Singularity Containers from Recipes

Because you do not have administrative privileges, you cannot build a Singularity container from a Singularity recipe file on Cypress.

Build Remotely on the Cloud

• You can build a Singularity container from a recipe on ​Sylabs Cloud.
• On Cypress, use the provided singularity pull... command to construct the image file from the cloud such as the following, substituting your chosen values for sylabsID, myCollection, myImage, and myTag.

[tulaneID@cypress01-009 ~]$singularity pull --arch amd64 library://sylabsID/myCollection/myImage:myTag

Signing Your Container File

• You may encounter the following messages,

  WARNING: integrity: signature not found for object group 1
  WARNING: Skipping container verification
  

• If so, then you can sign your container file via the following.
  • Create or update your Sylabs token as needed at ​Sylabs Cloud Tokens
  • Copy the new Sylabs token provided in the above as needed in your clipboard.
  • Confirm your remote login in your interactive session by entering the command

    [tulaneID@cypress01-009 ~]$singularity remote login
    

  • Paste the new Sylabs token provided as needed at the prompt.
  • Substitute your chosen values for sylabsID, myCollection, myImage, and myTag in the URL https://cloud.sylabs.io/library/sylabsID/myCollection/myImage
  • Observe on the Sylabs web page for the image the label Image is Unsigned.
  • Click on the button labeled Sign Image, and at the terminal enter the commands in the resulting pop-up window, such as the following.

    [tulaneID@cypress01-009 ~]$singularity pull sylabsID_mycollection.sif library://sylabsID/mycollection/myimage:mytag
    [tulaneID@cypress01-009 ~]$singularity key list
    [tulaneID@cypress01-009 ~]$singularity sign --keyidx 0 sylabsID_mycollection.sif
    Signing image: cb4sylabs_mycollection.sif
    Signature created and applied to cb4sylabs_mycollection.sif
    [tulaneID@cypress01-009 ~]$singularity push sylabsID_mycollection.sif library://sylabsID/mycollection/myimage:mytag
    3.6MiB / 3.6MiB [==============================================================================] 100 % 11.8 MiB/s 0s
    

  • Confirm on the Sylabs web page for the image, refreshing the page as needed, the label Image is Signed.

Build on Your Local Machine

• You could build a Linux machine and install Singularity.
• On Windows 11 or Windows 10 version 2004 and higher (Build 19041 and higher)
  • Install Windows Subsystem for Linux, version 2 (WSL 2). See ​Install WSL.
  • Install Singularity. See ​SingularityCE Documentation.
• As an alternative to SingularityCE, on your local machine (Linux or WSL 2) you could install Apptainer.
  • Apptainer will build .sif files compatible with Singularity. See ​ SIF Image Compatibility.
  • See ​ Apptainer Documentation .
• Then upload the resulting .sif file to Cypress from your local machine using scp. (See scp command.)