Add --compat short-hand for improved OCI/Docker compatibility
#235
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It is common for users to run docker containers that expect more isolation than is default in Singularity, and that can create files on startup. This is a simple short-hand to enable `--contain-all, --no-init, --no-umask, --writable-tmpfs`. These options give the best chance of an OCI/Docker container working as expected but *without* requiring the user/uts/net namespaces that we can't rely on in all installations / configurations of SingularityCE. Fixes: #75
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Whoops - there is a bit of noise here with octal literals, as I used |
tri-adam
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Aug 12, 2021
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Description of the Pull Request (PR):
It is common for users to run docker containers that expect more isolation than is default in Singularity, and that can create files on startup. This is a simple short-hand to enable
--contain-all, --no-init, --no-umask, --writable-tmpfs. These options give the best chance of an OCI/Docker container working as expected but without requiring the user/uts/net namespaces that we can't rely on in all installations / configurations of SingularityCE.This fixes or addresses the following GitHub issues:
Before submitting a PR, make sure you have done the following:
make checkand tested this PR locally with amake test, andmake testallif possible (see CONTRIBUTING.md).