mirror of https://github.com/kubernetes/kops.git
143 lines
3.6 KiB
Go
143 lines
3.6 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 nodetasks
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import (
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"errors"
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"fmt"
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"net/http"
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"path"
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"strings"
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"github.com/aws/aws-sdk-go/aws/awserr"
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"github.com/aws/aws-sdk-go/aws/ec2metadata"
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"github.com/aws/aws-sdk-go/aws/session"
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"github.com/aws/aws-sdk-go/service/ec2"
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"k8s.io/klog/v2"
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"k8s.io/kops/pkg/apis/kops"
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"k8s.io/kops/upup/pkg/fi"
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"k8s.io/kops/upup/pkg/fi/cloudup/awsup"
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"k8s.io/kops/upup/pkg/fi/nodeup/local"
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)
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type Prefix struct {
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Name string
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}
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var _ fi.HasName = &Prefix{}
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func (f *Prefix) GetName() *string {
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return &f.Name
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}
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// String returns a string representation, implementing the Stringer interface
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func (p *Prefix) String() string {
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return fmt.Sprintf("Prefix: %s", p.Name)
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}
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func (e *Prefix) Find(c *fi.NodeupContext) (*Prefix, error) {
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if c.T.BootConfig.CloudProvider != kops.CloudProviderAWS {
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return nil, fmt.Errorf("unsupported cloud provider: %s", c.T.BootConfig.CloudProvider)
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}
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mac, err := getInstanceMetadataFirstValue("mac")
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if err != nil {
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return nil, err
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}
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prefixes, err := getInstanceMetadataList(path.Join("network/interfaces/macs/", mac, "/ipv6-prefix"))
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if err != nil {
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return nil, err
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}
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if len(prefixes) == 0 {
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return nil, nil
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}
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klog.V(2).Infof("found prefix for primary network interface: %q", prefixes[0])
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actual := &Prefix{
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Name: e.Name,
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}
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return actual, nil
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}
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func (e *Prefix) Run(c *fi.NodeupContext) error {
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return fi.NodeupDefaultDeltaRunMethod(e, c)
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}
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func (_ *Prefix) CheckChanges(a, e, changes *Prefix) error {
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return nil
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}
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func (_ *Prefix) RenderLocal(t *local.LocalTarget, a, e, changes *Prefix) error {
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mac, err := getInstanceMetadataFirstValue("mac")
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if err != nil {
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return err
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}
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interfaceId, err := getInstanceMetadataFirstValue(path.Join("network/interfaces/macs/", mac, "/interface-id"))
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if err != nil {
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return err
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}
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response, err := t.Cloud.(awsup.AWSCloud).EC2().AssignIpv6Addresses(&ec2.AssignIpv6AddressesInput{
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Ipv6PrefixCount: fi.PtrTo(int64(1)),
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NetworkInterfaceId: fi.PtrTo(interfaceId),
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})
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if err != nil {
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return fmt.Errorf("failed to assign prefix: %w", err)
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}
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klog.V(2).Infof("assigned prefix to primary network interface: %q", fi.ValueOf(response.AssignedIpv6Prefixes[0]))
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return nil
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}
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func getInstanceMetadataFirstValue(category string) (string, error) {
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values, err := getInstanceMetadataList(category)
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if err != nil {
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return "", err
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}
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if len(values) == 0 {
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return "", fmt.Errorf("failed to get %q from ec2 meta-data: not found", category)
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}
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return values[0], nil
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}
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func getInstanceMetadataList(category string) ([]string, error) {
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sess := session.Must(session.NewSession())
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metadata := ec2metadata.New(sess)
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linesStr, err := metadata.GetMetadata(category)
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if err != nil {
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var aerr awserr.RequestFailure
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if errors.As(err, &aerr) && aerr.StatusCode() == http.StatusNotFound {
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return nil, nil
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} else {
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return nil, fmt.Errorf("failed to get %q from ec2 meta-data: %v", category, err)
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}
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}
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var values []string
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for _, line := range strings.Split(linesStr, "\n") {
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line = strings.TrimSpace(line)
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if len(line) > 0 {
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values = append(values, line)
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}
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}
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return values, nil
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}
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