ephemeralcontroller.go

Documentation: k8s.io/kubernetes/cmd/kube-controller-manager/app/options

     1  /*
     2  Copyright 2021 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package options
    18  
    19  import (
    20  	"fmt"
    21  
    22  	"github.com/spf13/pflag"
    23  
    24  	ephemeralvolumeconfig "k8s.io/kubernetes/pkg/controller/volume/ephemeral/config"
    25  )
    26  
    27  // EphemeralVolumeControllerOptions holds the EphemeralVolumeController options.
    28  type EphemeralVolumeControllerOptions struct {
    29  	*ephemeralvolumeconfig.EphemeralVolumeControllerConfiguration
    30  }
    31  
    32  // AddFlags adds flags related to EphemeralVolumeController for controller manager to the specified FlagSet.
    33  func (o *EphemeralVolumeControllerOptions) AddFlags(fs *pflag.FlagSet) {
    34  	if o == nil {
    35  		return
    36  	}
    37  
    38  	fs.Int32Var(&o.ConcurrentEphemeralVolumeSyncs, "concurrent-ephemeralvolume-syncs", o.ConcurrentEphemeralVolumeSyncs, "The number of ephemeral volume syncing operations that will be done concurrently. Larger number = faster ephemeral volume updating, but more CPU (and network) load")
    39  }
    40  
    41  // ApplyTo fills up EphemeralVolumeController config with options.
    42  func (o *EphemeralVolumeControllerOptions) ApplyTo(cfg *ephemeralvolumeconfig.EphemeralVolumeControllerConfiguration) error {
    43  	if o == nil {
    44  		return nil
    45  	}
    46  
    47  	cfg.ConcurrentEphemeralVolumeSyncs = o.ConcurrentEphemeralVolumeSyncs
    48  
    49  	return nil
    50  }
    51  
    52  // Validate checks validation of EphemeralVolumeControllerOptions.
    53  func (o *EphemeralVolumeControllerOptions) Validate() []error {
    54  	if o == nil {
    55  		return nil
    56  	}
    57  
    58  	errs := []error{}
    59  	if o.ConcurrentEphemeralVolumeSyncs < 1 {
    60  		errs = append(errs, fmt.Errorf("concurrent-ephemeralvolume-syncs must be greater than 0, but got %d", o.ConcurrentEphemeralVolumeSyncs))
    61  	}
    62  	return errs
    63  }
    64
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