mirror of
https://github.com/ceph/ceph-csi.git
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86 lines
3.1 KiB
Go
86 lines
3.1 KiB
Go
/*
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Copyright 2021 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package options
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import (
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"fmt"
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"github.com/spf13/pflag"
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"k8s.io/controller-manager/config"
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migrationconfig "k8s.io/controller-manager/pkg/leadermigration/config"
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)
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// LeaderMigrationOptions is the set of options for Leader Migration,
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// which is given to the controller manager through flags
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type LeaderMigrationOptions struct {
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// Enabled indicates whether leader migration is enabled through the --enabled-leader-migration flag.
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Enabled bool
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// ControllerMigrationConfig is the path to the file of LeaderMigrationConfiguration type.
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// It can be set with --leader-migration-config flag
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// If the path is "" (default vaule), the default vaule will be used.
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ControllerMigrationConfig string
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}
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// DefaultLeaderMigrationOptions returns a LeaderMigrationOptions with default values.
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func DefaultLeaderMigrationOptions() *LeaderMigrationOptions {
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return &LeaderMigrationOptions{
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Enabled: false,
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ControllerMigrationConfig: "",
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}
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}
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// AddFlags adds all flags related to leader migration to given flag set.
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func (o *LeaderMigrationOptions) AddFlags(fs *pflag.FlagSet) {
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if o == nil {
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return
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}
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fs.BoolVar(&o.Enabled, "enable-leader-migration", false, "Whether to enable controller leader migration.")
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fs.StringVar(&o.ControllerMigrationConfig, "leader-migration-config", "",
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"Path to the config file for controller leader migration, "+
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"or empty to use the value that reflects default configuration of the controller manager. "+
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"The config file should be of type LeaderMigrationConfiguration, group controllermanager.config.k8s.io, version v1alpha1.")
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}
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// ApplyTo applies the options of leader migration to generic configuration.
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func (o *LeaderMigrationOptions) ApplyTo(cfg *config.GenericControllerManagerConfiguration) error {
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if o == nil {
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// an nil LeaderMigrationOptions indicates that default options should be used
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// in which case leader migration will be disabled
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cfg.LeaderMigrationEnabled = false
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return nil
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}
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cfg.LeaderMigrationEnabled = o.Enabled
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if !cfg.LeaderMigrationEnabled {
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return nil
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}
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if o.ControllerMigrationConfig == "" {
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cfg.LeaderMigration = *migrationconfig.DefaultLeaderMigrationConfiguration()
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return nil
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}
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leaderMigrationConfig, err := migrationconfig.ReadLeaderMigrationConfiguration(o.ControllerMigrationConfig)
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if err != nil {
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return err
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}
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errs := migrationconfig.ValidateLeaderMigrationConfiguration(leaderMigrationConfig)
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if len(errs) != 0 {
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return fmt.Errorf("failed to parse leader migration configuration: %v", errs)
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}
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cfg.LeaderMigration = *leaderMigrationConfig
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return nil
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}
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