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virtcontainers: Do not pass /dev/shm as 9p mount

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All bind mounts are now passed to the guest with 9p.
We need to exclude /dev/shm, as this is passed as a bind mount
in the spec. We handle /dev/shm in the guest by allocating
memory for it on the guest side. Passing /dev/shm as a 9p mount
was causing it to be mounted twice.

Fixes #190

Signed-off-by: Archana Shinde <archana.m.shinde@intel.com>
This commit is contained in:
Archana Shinde 2018-04-05 08:55:50 -07:00
parent be151cb589
commit e96d3ef0d3
1 changed files with 7 additions and 0 deletions
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7
virtcontainers/container.go
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@ -304,6 +304,13 @@ func (c *Container) mountSharedDirMounts(hostSharedDir, guestSharedDir string) (
continue continue
} }
// We need to treat /dev/shm as a special case. This is passed as a bind mount in the spec,
// but it does not make sense to pass this as a 9p mount from the host side.
// This needs to be handled purely in the guest, by allocating memory for this inside the VM.
if m.Destination == "/dev/shm" {
continue
}
randBytes, err := generateRandomBytes(8) randBytes, err := generateRandomBytes(8)
if err != nil { if err != nil {
return nil, err return nil, err