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youki/MirgationGuide.md
Yashodhan Joshi 7fe1687d55 Update Migration Guide for 0.2.0 release
2023-09-01 15:46:17 +05:30

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Migration Guide

This contains information for migrating library versions.

V0.1.0 -> v0.2.0

libcontainer

  • The Rootless struct has been re-named as UserNamespaceConfig , RootlessIDMapper has been re-named to UserNamespaceIDMapper , and correspondingly the RootlessError has been re-named to UserNamespaceError . This is due to the fact that the structure was to be used for containers when a new user namespace is to be created, and that is not strictly only for rootless uses. Accordingly, the fields of various structs has been updated to reflect this change :

    • rootless (module name) -> user_ns
    • Rootless.rootless_id_mapper -> UserNamespaceConfig.id_mapper
    • LibcontainerError::Rootless -> LibcontainerError::UserNamespace
    • ContainerBuilderImpl.rootless -> ContainerBuilderImpl.user_ns_config
    • ContainerArgs.rootless -> ContainerArgs.user_ns_config

  • Executor now contains 2 methods for implementation. We introduce a validate step in addition to execute. The validate should validate the input OCI spec. The step runs after all the namespaces are entered and rootfs is pivoted.

  • Executor is now composible instead of an array of executor. To implement multiple executor, create a new executor that runs all the executor. The users are now in control of how multiple executor are run.