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Merge pull request #5922 from crosbymichael/host-dev-priv

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Mount /dev in tmpfs for privileged containers
This commit is contained in:
Victor Vieux 2014-05-21 18:56:24 -07:00
commit a0841ff1eb
6 changed files with 131 additions and 40 deletions
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12
libcontainer/mount/init.go
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@ -48,11 +48,11 @@ func InitializeMountNamespace(rootfs, console string, container *libcontainer.Co
if err := setupBindmounts(rootfs, container.Mounts); err != nil {
return fmt.Errorf("bind mounts %s", err)
}
if err := nodes.CopyN(rootfs, nodes.DefaultNodes, true); err != nil {
return fmt.Errorf("copy dev nodes %s", err)
if err := nodes.CopyN(rootfs, container.RequiredDeviceNodes, true); err != nil {
return fmt.Errorf("copy required dev nodes %s", err)
}
if err := nodes.CopyN(rootfs, nodes.AdditionalNodes, false); err != nil {
return fmt.Errorf("copy additional dev nodes %s", err)
if err := nodes.CopyN(rootfs, container.OptionalDeviceNodes, false); err != nil {
return fmt.Errorf("copy optional dev nodes %s", err)
}
if err := SetupPtmx(rootfs, console, container.Context["mount_label"]); err != nil {
return err
@ -195,12 +195,10 @@ func newSystemMounts(rootfs, mountLabel string, mounts libcontainer.Mounts) []mo
systemMounts := []mount{
{source: "proc", path: filepath.Join(rootfs, "proc"), device: "proc", flags: defaultMountFlags},
{source: "sysfs", path: filepath.Join(rootfs, "sys"), device: "sysfs", flags: defaultMountFlags},
{source: "tmpfs", path: filepath.Join(rootfs, "dev"), device: "tmpfs", flags: syscall.MS_NOSUID | syscall.MS_STRICTATIME, data: label.FormatMountLabel("mode=755", mountLabel)},
{source: "shm", path: filepath.Join(rootfs, "dev", "shm"), device: "tmpfs", flags: defaultMountFlags, data: label.FormatMountLabel("mode=1777,size=65536k", mountLabel)},
{source: "devpts", path: filepath.Join(rootfs, "dev", "pts"), device: "devpts", flags: syscall.MS_NOSUID | syscall.MS_NOEXEC, data: label.FormatMountLabel("newinstance,ptmxmode=0666,mode=620,gid=5", mountLabel)},
}
if len(mounts.OfType("devtmpfs")) == 1 {
systemMounts = append([]mount{{source: "tmpfs", path: filepath.Join(rootfs, "dev"), device: "tmpfs", flags: syscall.MS_NOSUID | syscall.MS_STRICTATIME, data: label.FormatMountLabel("mode=755", mountLabel)}}, systemMounts...)
}
return systemMounts
}