Add PathwaysJobSet.with_custom_libtpu to override libtpu at runtime on GKE. - #331
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… on GKE. Testing a custom `libtpu.so` with Pathways on GKE currently requires rebuilding the server and proxy images, which bake libtpu at `/lib/libtpu.so`. `with_custom_libtpu(uri)` adds an init container that downloads a `libtpu.so` (or a `.whl`/`.zip` containing one) from `gs://` or `http(s)://` into an `emptyDir` volume and `subPath`-mounts it over `/lib/libtpu.so` in the RM, proxy and worker containers (also setting `TPU_LIBRARY_PATH`), so the servers `dlopen` the custom library without any image rebuild. Calling it again replaces the override. PiperOrigin-RevId: 984946941
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Add
PathwaysJobSet.with_custom_libtputo override libtpu at runtime on GKE.Testing a custom
libtpu.sowith Pathways on GKE currently requiresrebuilding the server and proxy images, which bake libtpu at
/lib/libtpu.so.with_custom_libtpu(uri)adds an init container that downloads alibtpu.so(or a
.whl/.zipcontaining one) fromgs://orhttp(s)://into anemptyDirvolume andsubPath-mounts it over/lib/libtpu.soin the RM,proxy and worker containers (also setting
TPU_LIBRARY_PATH), so the serversdlopenthe custom library without any image rebuild. Calling it againreplaces the override.