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serviceaccount.go
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serviceaccount.go
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/*
Copyright 2021 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 gcetasks
import (
"context"
"fmt"
"reflect"
"google.golang.org/api/iam/v1"
"k8s.io/klog/v2"
"k8s.io/kops/upup/pkg/fi"
"k8s.io/kops/upup/pkg/fi/cloudup/gce"
"k8s.io/kops/upup/pkg/fi/cloudup/terraform"
"k8s.io/kops/upup/pkg/fi/cloudup/terraformWriter"
)
// +kops:fitask
type ServiceAccount struct {
Name *string
Lifecycle fi.Lifecycle
Email *string
Description *string
DisplayName *string
Shared *bool
}
var _ fi.CompareWithID = &ServiceAccount{}
func (e *ServiceAccount) CompareWithID() *string {
return e.Email
}
func (e *ServiceAccount) Find(c *fi.CloudupContext) (*ServiceAccount, error) {
cloud := c.T.Cloud.(gce.GCECloud)
ctx := context.TODO()
email := fi.ValueOf(e.Email)
if email == "default" {
// Special case - the default serviceaccount always exists
return e, nil
}
_, projectID, err := gce.SplitServiceAccountEmail(email)
if err != nil {
return nil, err
}
fqn := "projects/" + projectID + "/serviceAccounts/" + email
sa, err := cloud.IAM().ServiceAccounts().Get(ctx, fqn)
if err != nil {
if gce.IsNotFound(err) {
return nil, nil
}
return nil, fmt.Errorf("error listing ServiceAccount %q: %w", fqn, err)
}
// Check the email actually matches what we expect
if email != sa.Email {
return nil, fmt.Errorf("found ServiceAccount but email did not match expected; got %q; want %q", sa.Email, email)
}
actual := &ServiceAccount{}
actual.DisplayName = &sa.DisplayName
actual.Description = &sa.Description
actual.Email = &sa.Email
// Prevent spurious changes
actual.Lifecycle = e.Lifecycle
actual.Name = e.Name
actual.Shared = e.Shared
return actual, nil
}
func (e *ServiceAccount) Run(c *fi.CloudupContext) error {
return fi.CloudupDefaultDeltaRunMethod(e, c)
}
func (_ *ServiceAccount) CheckChanges(a, e, changes *ServiceAccount) error {
return nil
}
func (_ *ServiceAccount) RenderGCE(t *gce.GCEAPITarget, a, e, changes *ServiceAccount) error {
ctx := context.TODO()
cloud := t.Cloud
email := fi.ValueOf(e.Email)
shared := fi.ValueOf(e.Shared)
if shared {
// Verify the service account was found
if a == nil {
return fmt.Errorf("ServiceAccount with email %q not found", email)
}
}
accountID, projectID, err := gce.SplitServiceAccountEmail(email)
if err != nil {
return err
}
fqn := "projects/" + projectID + "/serviceAccounts/" + email
if a == nil {
klog.V(2).Infof("Creating ServiceAccount %q", fqn)
sa := &iam.CreateServiceAccountRequest{
AccountId: accountID,
ServiceAccount: &iam.ServiceAccount{
Description: fi.ValueOf(e.Description),
DisplayName: fi.ValueOf(e.DisplayName),
},
}
created, err := cloud.IAM().ServiceAccounts().Create(ctx, "projects/"+projectID, sa)
if err != nil {
return fmt.Errorf("error creating ServiceAccount %q: %w", fqn, err)
}
if created.Email != email {
return fmt.Errorf("created ServiceAccount did not have expected email; got %q; want %q", created.Email, email)
}
} else {
if changes.Description != nil || changes.DisplayName != nil {
sa := &iam.ServiceAccount{
Email: email,
Description: fi.ValueOf(e.Description),
DisplayName: fi.ValueOf(e.DisplayName),
}
_, err := cloud.IAM().ServiceAccounts().Update(ctx, fqn, sa)
if err != nil {
return fmt.Errorf("error creating ServiceAccount %q: %w", fqn, err)
}
changes.Description = nil
changes.DisplayName = nil
}
empty := &ServiceAccount{}
if !reflect.DeepEqual(empty, changes) {
return fmt.Errorf("cannot apply changes to ServiceAccount: %v", changes)
}
}
return nil
}
type terraformServiceAccount struct {
AccountID *string `cty:"account_id"`
ProjectID *string `cty:"project"`
Description *string `cty:"description"`
DisplayName *string `cty:"display_name"`
}
func (_ *ServiceAccount) RenderTerraform(t *terraform.TerraformTarget, a, e, changes *ServiceAccount) error {
shared := fi.ValueOf(e.Shared)
if shared {
// Not terraform owned / managed
return nil
}
email := fi.ValueOf(e.Email)
accountID, projectID, err := gce.SplitServiceAccountEmail(email)
if err != nil {
return err
}
tf := &terraformServiceAccount{
AccountID: &accountID,
ProjectID: &projectID,
Description: e.Description,
DisplayName: e.DisplayName,
}
return t.RenderResource("google_service_account", *e.Name, tf)
}
func (e *ServiceAccount) TerraformLink() *terraformWriter.Literal {
shared := fi.ValueOf(e.Shared)
if shared {
email := fi.ValueOf(e.Email)
if email == "" {
klog.Fatalf("Email must be set, if ServiceAccount is shared: %#v", e)
}
klog.V(4).Infof("reusing existing ServiceAccount %q", email)
return terraformWriter.LiteralFromStringValue(email)
}
return terraformWriter.LiteralProperty("google_service_account", *e.Name, "email")
}