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cgroups: Splity out Apply/Cleanup to separate file/interface 

This leaves only the generic cgroup helper functions in cgroups.go and
will allow easy implementations of other cgroup managers.

This also wires up the call to Cleanup the cgroup which was missing
before.

Docker-DCO-1.1-Signed-off-by: Alexander Larsson <alexl@redhat.com> (github: alexlarsson)
This commit is contained in:
Alexander Larsson 2014-03-14 10:47:49 +01:00
parent 5e030fd065
commit 949877915f
1 changed files with 10 additions and 6 deletions
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16
nsinit/exec.go
View File

@ -3,6 +3,7 @@
package nsinit
import (
"github.com/dotcloud/docker/pkg/cgroups"
"github.com/dotcloud/docker/pkg/libcontainer"
"github.com/dotcloud/docker/pkg/libcontainer/network"
"github.com/dotcloud/docker/pkg/system"
@ -61,10 +62,15 @@ func (ns *linuxNs) Exec(container *libcontainer.Container, term Terminal, args [
// Do this before syncing with child so that no children
// can escape the cgroup
ns.logger.Println("setting cgroups")
if err := ns.SetupCgroups(container, command.Process.Pid); err != nil {
activeCgroup, err := ns.SetupCgroups(container, command.Process.Pid)
if err != nil {
command.Process.Kill()
return -1, err
}
if activeCgroup != nil {
defer activeCgroup.Cleanup()
}
ns.logger.Println("setting up network")
if err := ns.InitializeNetworking(container, command.Process.Pid, syncPipe); err != nil {
command.Process.Kill()
@ -85,13 +91,11 @@ func (ns *linuxNs) Exec(container *libcontainer.Container, term Terminal, args [
return status, err
}
func (ns *linuxNs) SetupCgroups(container *libcontainer.Container, nspid int) error {
func (ns *linuxNs) SetupCgroups(container *libcontainer.Container, nspid int) (cgroups.ActiveCgroup, error) {
if container.Cgroups != nil {
if err := container.Cgroups.Apply(nspid); err != nil {
return err
}
return container.Cgroups.Apply(nspid)
}
return nil
return nil, nil
}
func (ns *linuxNs) InitializeNetworking(container *libcontainer.Container, nspid int, pipe *SyncPipe) error {