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