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Mount over dev and only copy allowed nodes in

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Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
This commit is contained in:
Michael Crosby 2014-04-11 14:30:09 +00:00
parent ef923907df
commit cc900b9db8
1 changed files with 13 additions and 5 deletions
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18
libcontainer/nsinit/mount.go
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@ -47,14 +47,14 @@ func setupNewMountNamespace(rootfs, console string, container *libcontainer.Cont
if err := setupBindmounts(rootfs, container.Mounts); err != nil {
return fmt.Errorf("bind mounts %s", err)
}
if err := copyDevNodes(rootfs); err != nil {
return fmt.Errorf("copy dev nodes %s", err)
}
if restrictionPath := container.Context["restriction_path"]; restrictionPath != "" {
if err := restrict.Restrict(rootfs, restrictionPath); err != nil {
return fmt.Errorf("restrict %s", err)
}
}
if err := copyDevNodes(rootfs); err != nil {
return fmt.Errorf("copy dev nodes %s", err)
}
if err := setupPtmx(rootfs, console, container.Context["mount_label"]); err != nil {
return err
}
@ -273,12 +273,20 @@ func setupBindmounts(rootfs string, bindMounts libcontainer.Mounts) error {
}
func newSystemMounts(rootfs, mountLabel string, mounts libcontainer.Mounts) []mount {
systemMounts := []mount{
{source: "proc", path: filepath.Join(rootfs, "proc"), device: "proc", flags: defaultMountFlags},
devMounts := []mount{
{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)},
}
systemMounts := []mount{
{source: "proc", path: filepath.Join(rootfs, "proc"), device: "proc", flags: defaultMountFlags},
}
if len(mounts.OfType("devtmpfs")) == 1 {
systemMounts = append(systemMounts, mount{source: "tmpfs", path: filepath.Join(rootfs, "dev"), device: "tmpfs", flags: syscall.MS_NOSUID | syscall.MS_STRICTATIME, data: "mode=755"})
}
systemMounts = append(systemMounts, devMounts...)
if len(mounts.OfType("sysfs")) == 1 {
systemMounts = append(systemMounts, mount{source: "sysfs", path: filepath.Join(rootfs, "sys"), device: "sysfs", flags: defaultMountFlags})
}