mirror of https://github.com/k3s-io/k3s
60 lines
1.1 KiB
Go
60 lines
1.1 KiB
Go
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package leader
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import (
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"context"
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"sync"
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"time"
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"github.com/sirupsen/logrus"
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"k8s.io/client-go/kubernetes"
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)
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type Manager struct {
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sync.Mutex
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leaderChan chan struct{}
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leaderStarted bool
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leaderCTX context.Context
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namespace string
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name string
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k8s kubernetes.Interface
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}
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func NewManager(namespace, name string, k8s kubernetes.Interface) *Manager {
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return &Manager{
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leaderChan: make(chan struct{}),
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namespace: namespace,
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name: name,
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k8s: k8s,
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}
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}
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func (m *Manager) Start(ctx context.Context) {
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m.Lock()
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defer m.Unlock()
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if m.leaderStarted {
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return
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}
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m.leaderStarted = true
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go RunOrDie(ctx, m.namespace, m.name, m.k8s, func(ctx context.Context) {
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m.leaderCTX = ctx
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close(m.leaderChan)
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})
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}
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// OnLeader this function will be called when leadership is acquired.
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func (m *Manager) OnLeader(f func(ctx context.Context) error) {
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go func() {
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<-m.leaderChan
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for {
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if err := f(m.leaderCTX); err != nil {
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logrus.Errorf("failed to call leader func: %v", err)
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time.Sleep(5 * time.Second)
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continue
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}
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break
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}
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}()
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}
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