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Make netns bind mount shared

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To 'avoid unknown FS magic on "/run/user/1000/netns/...": 1021994'
make the network namespace bind-mount recursively shared, so the
mount is back-propogated to the host.

Signed-off-by: gabi beyer <gabrielle.n.beyer@intel.com>
This commit is contained in:
gabi beyer
2019-08-23 17:52:45 +00:00
committed by Marco Vedovati
parent f50ba201c4
commit 0115be19f5
1 changed files with 3 additions and 2 deletions
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5
pkg/netns/netns_linux.go
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@ -152,8 +152,9 @@ func NewNS() (ns.NetNS, error) {
// bind mount the netns from the current thread (from /proc) onto the
// mount point. This causes the namespace to persist, even when there
// are no threads in the ns.
err = unix.Mount(getCurrentThreadNetNSPath(), nsPath, "none", unix.MS_BIND, "")
// are no threads in the ns. Make this a shared mount; it needs to be
// back-propogated to the host
err = unix.Mount(getCurrentThreadNetNSPath(), nsPath, "none", unix.MS_BIND|unix.MS_SHARED|unix.MS_REC, "")
if err != nil {
err = fmt.Errorf("failed to bind mount ns at %s: %v", nsPath, err)
}