/
kube_node_remove.go
97 lines (86 loc) · 2.17 KB
/
kube_node_remove.go
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package op
import (
"context"
"fmt"
"strings"
"github.com/cybozu-go/cke"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/json"
"k8s.io/apimachinery/pkg/util/strategicpatch"
)
type kubeNodeRemove struct {
apiserver *cke.Node
nodes []*corev1.Node
done bool
}
// KubeNodeRemoveOp removes k8s Node resources.
func KubeNodeRemoveOp(apiserver *cke.Node, nodes []*corev1.Node) cke.Operator {
return &kubeNodeRemove{apiserver: apiserver, nodes: nodes}
}
func (o *kubeNodeRemove) Name() string {
return "remove-node"
}
func (o *kubeNodeRemove) NextCommand() cke.Commander {
if o.done {
return nil
}
o.done = true
return nodeRemoveCommand{o.apiserver, o.nodes}
}
func (o *kubeNodeRemove) Targets() []string {
return []string{
o.apiserver.Address,
}
}
type nodeRemoveCommand struct {
apiserver *cke.Node
nodes []*corev1.Node
}
func (c nodeRemoveCommand) Run(ctx context.Context, inf cke.Infrastructure, _ string) error {
cs, err := inf.K8sClient(ctx, c.apiserver)
if err != nil {
return err
}
nodesAPI := cs.CoreV1().Nodes()
for _, n := range c.nodes {
if !n.DeletionTimestamp.IsZero() {
continue
}
if !n.Spec.Unschedulable {
oldData, err := json.Marshal(n)
if err != nil {
return err
}
n.Spec.Unschedulable = true
newData, err := json.Marshal(n)
if err != nil {
return err
}
patchBytes, err := strategicpatch.CreateTwoWayMergePatch(oldData, newData, n)
if err != nil {
return fmt.Errorf("failed to create patch for node %s: %v", n.Name, err)
}
_, err = nodesAPI.Patch(ctx, n.Name, types.StrategicMergePatchType, patchBytes, metav1.PatchOptions{})
if err != nil {
return fmt.Errorf("failed to patch node %s: %v", n.Name, err)
}
}
err = nodesAPI.Delete(ctx, n.Name, metav1.DeleteOptions{})
if err != nil {
return fmt.Errorf("failed to delete node %s: %v", n.Name, err)
}
}
return nil
}
func (c nodeRemoveCommand) Command() cke.Command {
names := make([]string, len(c.nodes))
for i, n := range c.nodes {
names[i] = n.Name
}
return cke.Command{
Name: "removeNode",
Target: strings.Join(names, ","),
}
}