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create_daemonset.go
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create_daemonset.go
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package nodedns
import (
"context"
"strings"
"github.com/cybozu-go/cke"
"github.com/cybozu-go/cke/op"
v12 "k8s.io/api/apps/v1"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/yaml"
)
type createDaemonSetOp struct {
apiserver *cke.Node
finished bool
}
// CreateDaemonSetOp returns an Operator to create unbound daemonset.
func CreateDaemonSetOp(apiserver *cke.Node) cke.Operator {
return &createDaemonSetOp{
apiserver: apiserver,
}
}
func (o *createDaemonSetOp) Name() string {
return "create-node-dns-daemonset"
}
func (o *createDaemonSetOp) NextCommand() cke.Commander {
if o.finished {
return nil
}
o.finished = true
return createDaemonSetCommand{o.apiserver}
}
type createDaemonSetCommand struct {
apiserver *cke.Node
}
func (c createDaemonSetCommand) Run(ctx context.Context, inf cke.Infrastructure) error {
cs, err := inf.K8sClient(ctx, c.apiserver)
if err != nil {
return err
}
// DaemonSet
daemonSets := cs.AppsV1().DaemonSets("kube-system")
_, err = daemonSets.Get(op.NodeDNSAppName, v1.GetOptions{})
switch {
case err == nil:
case errors.IsNotFound(err):
daemonSet := new(v12.DaemonSet)
err = yaml.NewYAMLToJSONDecoder(strings.NewReader(unboundDaemonSetText)).Decode(daemonSet)
if err != nil {
return err
}
_, err = daemonSets.Create(daemonSet)
if err != nil {
return err
}
default:
return err
}
return nil
}
func (c createDaemonSetCommand) Command() cke.Command {
return cke.Command{
Name: "createDaemonSetCommand",
Target: "kube-system",
}
}