/
kube_wait.go
84 lines (69 loc) · 1.63 KB
/
kube_wait.go
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package op
import (
"context"
"time"
"github.com/cybozu-go/cke"
"github.com/cybozu-go/log"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
type kubeWaitOp struct {
apiserver *cke.Node
finished bool
}
// KubeWaitOp returns an Operator to wait for Kubernetes resources gets initialized
func KubeWaitOp(apiserver *cke.Node) cke.Operator {
return &kubeWaitOp{apiserver: apiserver}
}
func (o *kubeWaitOp) Name() string {
return "wait-kubernetes"
}
func (o *kubeWaitOp) NextCommand() cke.Commander {
if o.finished {
return nil
}
o.finished = true
return waitKubeCommand{o.apiserver}
}
func (o *kubeWaitOp) Targets() []string {
return []string{
o.apiserver.Address,
}
}
type waitKubeCommand struct {
apiserver *cke.Node
}
func (c waitKubeCommand) Run(ctx context.Context, inf cke.Infrastructure, _ string) error {
cs, err := inf.K8sClient(ctx, c.apiserver)
if err != nil {
return err
}
begin := time.Now()
for i := 0; i < 100; i++ {
_, err = cs.CoreV1().ServiceAccounts("kube-system").Get(ctx, "default", metav1.GetOptions{})
switch {
case err == nil:
elapsed := time.Since(begin)
log.Info("k8s gets initialized", map[string]interface{}{
"elapsed": elapsed.Seconds(),
})
return nil
case errors.IsNotFound(err):
select {
case <-time.After(time.Second):
case <-ctx.Done():
}
default:
return err
}
}
// Timed-out here is not an error because waitKubeCommand will be invoked
// again by the controller.
return nil
}
func (c waitKubeCommand) Command() cke.Command {
return cke.Command{
Name: "waitKubeCommand",
Target: "kube-system sa/default",
}
}