install: Re-implement hostns to work around supermin #203
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I'm experimenting with doing `bootc install` in a supermin VM like we do in coreos-assembler, but hit upon the fact that supermin's `/sbin/init` implementation incorrectly does `chroot()` instead of a `pivot_root`: https://github.com/libguestfs/supermin/blob/5230e2c3cd07e82bd6431e871e239f7056bf25ad/init/init.c#L288 The problem here then is doing `nsenter` just takes us into the original rootfs, and all the real content is in `/root`. Re-implement this by re-executing our own binary and doing the `setns()` and `chroot()` dance internally, because we can't really do it with external binaries. Signed-off-by: Colin Walters <[email protected]>
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Filed libguestfs/supermin#19 |
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I'm experimenting with doing
bootc installin a supermin VM like we do in coreos-assembler, but hit upon the fact that supermin's/sbin/initimplementation incorrectly doeschroot()instead of apivot_root:https://github.com/libguestfs/supermin/blob/5230e2c3cd07e82bd6431e871e239f7056bf25ad/init/init.c#L288
The problem here then is doing
nsenterjust takes us into the original rootfs, and all the real content is in/root.Re-implement this by re-executing our own binary and doing the
setns()andchroot()dance internally, because we can't really do it with external binaries.