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Fix nslookup cannot work well in initContainerTemplate #216
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PytorchJob workers' initContainer always try to check if master pod is up by
nslookup
command, however nslookup in default imagebusybox:1.31.0
version seems too old that it cannot work well, its exit code is always 1 for ppc64le arch even it can parse master service dns, and for amd64, it cannot work steadily as below, when I change the image toalpine:3.10
, both on amd64 and ppc64le, it works well