Dependencies

• buildah: A tool that facilitates building OCI images https://github.com/containers/buildah
• python

Steps

Building the Docker image

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• You must place id_rsa file as roles/kepler/files/id_rsa and roles/ual/files/id_rsa
• The id_rsa file contains private key which allows passwordless login to ssh://git@git.iter.org 

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Code Block
language bash

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git

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clone

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-

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b

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develop ssh://

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git@git.iter.

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org/

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imex/

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imas-container.git cd imas-container/ ./01-base ./02-ual #

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will

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ask

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for SSH private key to access git.iter.org ./03-kepler # as above ./04-fc2k # as above

• Each step creates a cached layer
• First imas/base is created with compilers, libraries, etc.
• Then imas/ual on top of that with IMAS environment
• Next imas/kepler with addition of Kepler
• Finally imas/fc2k with FC2K installation

Saving the image

• Check image ID with command:

  Code Block
  language bash
  $ buildah images REPOSITORY TAG IMAGE ID CREATED SIZE localhost/imas/fc2k latest ba3ac550589e 7 days ago 2.98 GB

• Save to Docker daemon:

  Code Block
  buildah push ba3ac550589e docker-daemon:imas/fc2k:latest

• Save to file:

  Code Block
  docker save imas/fc2k:latest | xz > imas-fc2k-latest.tar.xz

Warning

You could use buildah push <IMAGE-ID> docker-archive:FILE.TAR to export directly to a file. However, uDocker is unable to load such files, therefore it is recommended to export images through Docker daemon as described above.