This repository has been archived by the owner on Mar 9, 2022. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 349
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Merge pull request #1405 from fuweid/me-async-load-cnicnf
reload cni network config if has fs change events
- Loading branch information
Showing
17 changed files
with
2,002 additions
and
16 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,121 @@ | ||
/* | ||
Copyright The Containerd Authors. | ||
Licensed under the Apache License, Version 2.0 (the "License"); | ||
you may not use this file except in compliance with the License. | ||
You may obtain a copy of the License at | ||
http://www.apache.org/licenses/LICENSE-2.0 | ||
Unless required by applicable law or agreed to in writing, software | ||
distributed under the License is distributed on an "AS IS" BASIS, | ||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
See the License for the specific language governing permissions and | ||
limitations under the License. | ||
*/ | ||
|
||
package server | ||
|
||
import ( | ||
"os" | ||
"sync" | ||
|
||
cni "github.com/containerd/go-cni" | ||
"github.com/fsnotify/fsnotify" | ||
"github.com/pkg/errors" | ||
"github.com/sirupsen/logrus" | ||
) | ||
|
||
// cniNetConfSyncer is used to reload cni network conf triggered by fs change | ||
// events. | ||
type cniNetConfSyncer struct { | ||
// only used for lastSyncStatus | ||
sync.RWMutex | ||
lastSyncStatus error | ||
|
||
watcher *fsnotify.Watcher | ||
confDir string | ||
netPlugin cni.CNI | ||
loadOpts []cni.CNIOpt | ||
} | ||
|
||
// newCNINetConfSyncer creates cni network conf syncer. | ||
func newCNINetConfSyncer(confDir string, netPlugin cni.CNI, loadOpts []cni.CNIOpt) (*cniNetConfSyncer, error) { | ||
watcher, err := fsnotify.NewWatcher() | ||
if err != nil { | ||
return nil, errors.Wrap(err, "failed to create fsnotify watcher") | ||
} | ||
|
||
if err := os.MkdirAll(confDir, 0700); err != nil { | ||
return nil, errors.Wrapf(err, "failed to create cni conf dir=%s for watch", confDir) | ||
} | ||
|
||
if err := watcher.Add(confDir); err != nil { | ||
return nil, errors.Wrapf(err, "failed to watch cni conf dir %s", confDir) | ||
} | ||
|
||
syncer := &cniNetConfSyncer{ | ||
watcher: watcher, | ||
confDir: confDir, | ||
netPlugin: netPlugin, | ||
loadOpts: loadOpts, | ||
} | ||
|
||
if err := syncer.netPlugin.Load(syncer.loadOpts...); err != nil { | ||
logrus.WithError(err).Error("failed to load cni during init, please check CRI plugin status before setting up network for pods") | ||
syncer.updateLastStatus(err) | ||
} | ||
return syncer, nil | ||
} | ||
|
||
// syncLoop monitors any fs change events from cni conf dir and tries to reload | ||
// cni configuration. | ||
func (syncer *cniNetConfSyncer) syncLoop() error { | ||
for { | ||
select { | ||
case event := <-syncer.watcher.Events: | ||
// Only reload config when receiving write/rename/remove | ||
// events | ||
// | ||
// TODO(fuweid): Might only reload target cni config | ||
// files to prevent no-ops. | ||
if event.Op&(fsnotify.Chmod|fsnotify.Create) > 0 { | ||
logrus.Debugf("ignore event from cni conf dir: %s", event) | ||
continue | ||
} | ||
logrus.Debugf("receiving change event from cni conf dir: %s", event) | ||
|
||
lerr := syncer.netPlugin.Load(syncer.loadOpts...) | ||
if lerr != nil { | ||
logrus.WithError(lerr). | ||
Errorf("failed to reload cni configuration after receiving fs change event(%s)", event) | ||
} | ||
syncer.updateLastStatus(lerr) | ||
|
||
case err := <-syncer.watcher.Errors: | ||
if err != nil { | ||
logrus.WithError(err).Error("failed to continue sync cni conf change") | ||
return err | ||
} | ||
} | ||
} | ||
} | ||
|
||
// lastStatus retrieves last sync status. | ||
func (syncer *cniNetConfSyncer) lastStatus() error { | ||
syncer.RLock() | ||
defer syncer.RUnlock() | ||
return syncer.lastSyncStatus | ||
} | ||
|
||
// updateLastStatus will be called after every single cni load. | ||
func (syncer *cniNetConfSyncer) updateLastStatus(err error) { | ||
syncer.Lock() | ||
defer syncer.Unlock() | ||
syncer.lastSyncStatus = err | ||
} | ||
|
||
// stop stops watcher in the syncLoop. | ||
func (syncer *cniNetConfSyncer) stop() error { | ||
return syncer.watcher.Close() | ||
} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Some generated files are not rendered by default. Learn more about how customized files appear on GitHub.
Oops, something went wrong.
Some generated files are not rendered by default. Learn more about how customized files appear on GitHub.
Oops, something went wrong.
Oops, something went wrong.