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Merge pull request #36191 from cpuguy83/fix_attachable_network_race

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Fix race in attachable network attachment
This commit is contained in:
Yong Tang 2018-02-05 09:41:35 -08:00 committed by GitHub
commit 6987557e0c
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 15 additions and 5 deletions
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15
daemon/container_operations.go
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@ -346,7 +346,9 @@ func (daemon *Daemon) updateNetwork(container *container.Container) error {
}
func (daemon *Daemon) findAndAttachNetwork(container *container.Container, idOrName string, epConfig *networktypes.EndpointSettings) (libnetwork.Network, *networktypes.NetworkingConfig, error) {
n, err := daemon.FindNetwork(getNetworkID(idOrName, epConfig))
id := getNetworkID(idOrName, epConfig)
n, err := daemon.FindNetwork(id)
if err != nil {
// We should always be able to find the network for a
// managed container.
@ -379,21 +381,26 @@ func (daemon *Daemon) findAndAttachNetwork(container *container.Container, idOrN
retryCount int
)
if n == nil && daemon.attachableNetworkLock != nil {
daemon.attachableNetworkLock.Lock(id)
defer daemon.attachableNetworkLock.Unlock(id)
}
for {
// In all other cases, attempt to attach to the network to
// trigger attachment in the swarm cluster manager.
if daemon.clusterProvider != nil {
var err error
config, err = daemon.clusterProvider.AttachNetwork(getNetworkID(idOrName, epConfig), container.ID, addresses)
config, err = daemon.clusterProvider.AttachNetwork(id, container.ID, addresses)
if err != nil {
return nil, nil, err
}
}
n, err = daemon.FindNetwork(getNetworkID(idOrName, epConfig))
n, err = daemon.FindNetwork(id)
if err != nil {
if daemon.clusterProvider != nil {
if err := daemon.clusterProvider.DetachNetwork(getNetworkID(idOrName, epConfig), container.ID); err != nil {
if err := daemon.clusterProvider.DetachNetwork(id, container.ID); err != nil {
logrus.Warnf("Could not rollback attachment for container %s to network %s: %v", container.ID, idOrName, err)
}
}

5
daemon/daemon.go
View file

@ -43,6 +43,7 @@ import (
"github.com/docker/docker/migrate/v1"
"github.com/docker/docker/pkg/containerfs"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/locker"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/sysinfo"
"github.com/docker/docker/pkg/system"
@ -120,7 +121,8 @@ type Daemon struct {
hosts map[string]bool // hosts stores the addresses the daemon is listening on
startupDone chan struct{}
attachmentStore network.AttachmentStore
attachmentStore network.AttachmentStore
attachableNetworkLock *locker.Locker
}
// StoreHosts stores the addresses the daemon is listening on
@ -564,6 +566,7 @@ func (daemon *Daemon) DaemonLeavesCluster() {
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
daemon.clusterProvider = clusterProvider
daemon.netController.SetClusterProvider(clusterProvider)
daemon.attachableNetworkLock = locker.New()
}
// IsSwarmCompatible verifies if the current daemon