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sshkey.go
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sshkey.go
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/*
Copyright 2019 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package openstacktasks
import (
"fmt"
"strings"
"github.com/gophercloud/gophercloud/openstack/compute/v2/extensions/keypairs"
"k8s.io/klog/v2"
"k8s.io/kops/pkg/pki"
"k8s.io/kops/upup/pkg/fi"
"k8s.io/kops/upup/pkg/fi/cloudup/openstack"
)
// +kops:fitask
type SSHKey struct {
Name *string
Lifecycle *fi.Lifecycle
PublicKey fi.Resource
KeyFingerprint *string
}
var _ fi.CompareWithID = &SSHKey{}
func (e *SSHKey) CompareWithID() *string {
return e.Name
}
func (e *SSHKey) Find(c *fi.Context) (*SSHKey, error) {
cloud := c.Cloud.(openstack.OpenstackCloud)
rs, err := cloud.GetKeypair(openstackKeyPairName(fi.StringValue(e.Name)))
if err != nil {
return nil, err
}
if rs == nil {
return nil, nil
}
actual := &SSHKey{
Name: e.Name,
KeyFingerprint: fi.String(rs.Fingerprint),
}
// Avoid spurious changes
if fi.StringValue(actual.KeyFingerprint) == fi.StringValue(e.KeyFingerprint) {
klog.V(2).Infof("SSH key fingerprints match; assuming public keys match")
actual.PublicKey = e.PublicKey
} else {
klog.V(2).Infof("Computed SSH key fingerprint mismatch: %q %q", fi.StringValue(e.KeyFingerprint), fi.StringValue(actual.KeyFingerprint))
}
actual.Lifecycle = e.Lifecycle
return actual, nil
}
func (e *SSHKey) Run(c *fi.Context) error {
if e.KeyFingerprint == nil && e.PublicKey != nil {
publicKey, err := fi.ResourceAsString(e.PublicKey)
if err != nil {
return fmt.Errorf("error reading SSH public key: %v", err)
}
keyFingerprint, err := pki.ComputeOpenSSHKeyFingerprint(publicKey)
if err != nil {
return fmt.Errorf("error computing key fingerprint for SSH key: %v", err)
}
klog.V(2).Infof("Computed SSH key fingerprint as %q", keyFingerprint)
e.KeyFingerprint = &keyFingerprint
}
return fi.DefaultDeltaRunMethod(e, c)
}
func (s *SSHKey) CheckChanges(a, e, changes *SSHKey) error {
if a == nil {
if e.Name == nil {
return fi.RequiredField("Name")
}
} else {
if changes.Name != nil {
return fi.CannotChangeField("Name")
}
if changes.KeyFingerprint != nil {
return fi.CannotChangeField("KeyFingerprint")
}
}
return nil
}
func openstackKeyPairName(org string) string {
name := strings.Replace(org, ".", "-", -1)
name = strings.Replace(name, ":", "_", -1)
return name
}
func (_ *SSHKey) RenderOpenstack(t *openstack.OpenstackAPITarget, a, e, changes *SSHKey) error {
if a == nil {
klog.V(2).Infof("Creating Keypair with name:%q", fi.StringValue(e.Name))
opt := keypairs.CreateOpts{
Name: openstackKeyPairName(fi.StringValue(e.Name)),
}
if e.PublicKey != nil {
d, err := fi.ResourceAsString(e.PublicKey)
if err != nil {
return fmt.Errorf("error rendering SSHKey PublicKey: %v", err)
}
opt.PublicKey = d
}
v, err := t.Cloud.CreateKeypair(opt)
if err != nil {
return fmt.Errorf("Error creating keypair: %v", err)
}
e.KeyFingerprint = fi.String(v.Fingerprint)
klog.V(2).Infof("Creating a new Openstack keypair, id=%s", v.Fingerprint)
return nil
}
e.KeyFingerprint = a.KeyFingerprint
klog.V(2).Infof("Using an existing Openstack keypair, id=%s", fi.StringValue(e.KeyFingerprint))
return nil
}