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logging_controller.go
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/
logging_controller.go
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package loglevel
import (
"context"
operatorv1 "github.com/openshift/api/operator/v1"
"github.com/openshift/library-go/pkg/controller/factory"
"github.com/openshift/library-go/pkg/operator/events"
operatorv1helpers "github.com/openshift/library-go/pkg/operator/v1helpers"
"k8s.io/klog"
)
type LogLevelController struct {
operatorClient operatorv1helpers.OperatorClient
// for unit tests only
setLogLevelFn func(operatorv1.LogLevel) error
getLogLevelFn func() (operatorv1.LogLevel, bool)
}
// sets the klog level based on desired state
func NewClusterOperatorLoggingController(operatorClient operatorv1helpers.OperatorClient, recorder events.Recorder) factory.Controller {
c := &LogLevelController{
operatorClient: operatorClient,
setLogLevelFn: SetLogLEvel,
getLogLevelFn: GetLogLevel,
}
return factory.New().WithInformers(operatorClient.Informer()).WithSync(c.sync).ToController("LoggingSyncer", recorder)
}
// sync reacts to a change in prereqs by finding information that is required to match another value in the cluster. This
// must be information that is logically "owned" by another component.
func (c LogLevelController) sync(ctx context.Context, syncCtx factory.SyncContext) error {
detailedSpec, _, _, err := c.operatorClient.GetOperatorState()
if err != nil {
return err
}
currentLogLevel, isUnknown := c.getLogLevelFn()
desiredLogLevel := detailedSpec.OperatorLogLevel
// if operator operatorSpec OperatorLogLevel is empty, default to "Normal"
// TODO: This should be probably done by defaulting the CR field?
if len(desiredLogLevel) == 0 {
desiredLogLevel = operatorv1.Normal
}
if !ValidLogLevel(desiredLogLevel) {
klog.Warningf("OperatorLogLevelInvalid: Invalid logLevel %q, falling back to %q", desiredLogLevel, operatorv1.Normal)
desiredLogLevel = operatorv1.Normal
}
// correct log level is set and it matches the expected log level from operator operatorSpec, do nothing.
if !isUnknown && currentLogLevel == desiredLogLevel {
return nil
}
// log level is not specified in operatorSpec and the log verbosity is not set (0), default the log level to V(2).
if len(desiredLogLevel) == 0 {
desiredLogLevel = currentLogLevel
}
// Set the new loglevel if the operator operatorSpec changed
if err := c.setLogLevelFn(desiredLogLevel); err != nil {
syncCtx.Recorder().Warningf("OperatorLogLevelChangeFailed", "Unable to change operator log level from %q to %q: %v", currentLogLevel, desiredLogLevel, err)
return err
}
// Do not fire event on every restart.
if isUnknown {
return nil
}
syncCtx.Recorder().Eventf("OperatorLogLevelChange", "Operator log level changed from %q to %q", currentLogLevel, desiredLogLevel)
return nil
}