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Introduce some default log verbosity control

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Move a lot of common error logging into better buckets:

glog.Errorf() - Always an error
glog.Warningf() - Something unexpected, but probably not an error
glog.V(0) - Generally useful for this to ALWAYS be visible
            to an operator
            * Programmer errors
            * Logging extra info about a panic
            * CLI argument handling
glog.V(1) - A reasonable default log level if you don't want
            verbosity
            * Information about config (listening on X, watching Y)
            * Errors that repeat frequently that relate to conditions
              that can be corrected (pod detected as unhealthy)
glog.V(2) - Useful steady state information about the service
            * Logging HTTP requests and their exit code
            * System state changing (killing pod)
            * Controller state change events (starting pods)
            * Scheduler log messages
glog.V(3) - Extended information about changes
            * More info about system state changes
glog.V(4) - Debug level verbosity (for now)
            * Logging in particularly thorny parts of code where
              you may want to come back later and check it
This commit is contained in:
Clayton Coleman
2014-09-18 06:46:14 -04:00
parent 74db9a1b20
commit 4e56dafecc
20 changed files with 97 additions and 76 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
pkg/controller/replication_controller.go
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@@ -115,7 +115,7 @@ func (rm *ReplicationManager) watchControllers(resourceVersion *uint64) {
// that called us call us again.
return
}
glog.Infof("Got watch: %#v", event)
glog.V(4).Infof("Got watch: %#v", event)
rc, ok := event.Object.(*api.ReplicationController)
if !ok {
glog.Errorf("unexpected object: %#v", event.Object)
@@ -125,7 +125,7 @@ func (rm *ReplicationManager) watchControllers(resourceVersion *uint64) {
*resourceVersion = rc.ResourceVersion + 1
// Sync even if this is a deletion event, to ensure that we leave
// it in the desired state.
glog.Infof("About to sync from watch: %v", rc.ID)
glog.V(4).Infof("About to sync from watch: %v", rc.ID)
rm.syncHandler(*rc)
}
}
@@ -153,7 +153,7 @@ func (rm *ReplicationManager) syncReplicationController(controllerSpec api.Repli
diff *= -1
wait := sync.WaitGroup{}
wait.Add(diff)
glog.Infof("Too few replicas, creating %d\n", diff)
glog.V(2).Infof("Too few replicas, creating %d\n", diff)
for i := 0; i < diff; i++ {
go func() {
defer wait.Done()
@@ -162,7 +162,7 @@ func (rm *ReplicationManager) syncReplicationController(controllerSpec api.Repli
}
wait.Wait()
} else if diff > 0 {
glog.Infof("Too many replicas, deleting %d\n", diff)
glog.V(2).Infof("Too many replicas, deleting %d\n", diff)
wait := sync.WaitGroup{}
wait.Add(diff)
for i := 0; i < diff; i++ {
@@ -191,7 +191,7 @@ func (rm *ReplicationManager) synchronize() {
for ix := range controllerSpecs {
go func(ix int) {
defer wg.Done()
glog.Infof("periodic sync of %v", controllerSpecs[ix].ID)
glog.V(4).Infof("periodic sync of %v", controllerSpecs[ix].ID)
err := rm.syncHandler(controllerSpecs[ix])
if err != nil {
glog.Errorf("Error synchronizing: %#v", err)