Add configuration step required for recent versions of singularity #46
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I noticed that from Singularity >= 3.8.0 an additional step is required to make use of the
network -> allocate_ipfeature we added a couple of day ago.This PR adds to the docs a reference to what the user must do in order to get it working (and avoid losing a few hours troubleshooting this like me 😓 )
References:
The 'culprit' is this if statement:
https://github.com/hpcng/singularity/blob/release-3.8/internal/pkg/runtime/engine/singularity/container_linux.go#L2265-L2272
The solution is in this config file directive:
https://github.com/hpcng/singularity/blame/2c947291855a0374961774eeaa130815f6176cd4/pkg/util/singularityconf/config.go#L57