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gcpUtils.go
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gcpUtils.go
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package app
import (
"fmt"
"time"
"io/ioutil"
"path"
"strings"
"github.com/ghodss/yaml"
"github.com/prometheus/client_golang/prometheus"
log "github.com/sirupsen/logrus"
"golang.org/x/net/context"
"golang.org/x/oauth2"
"google.golang.org/api/cloudresourcemanager/v1"
"google.golang.org/api/deploymentmanager/v2"
"github.com/cenkalti/backoff"
)
type Resource struct {
Name string `json:"name"`
Type string `json:"type"`
Properties map[string]interface{} `json:"properties"`
}
type DmConf struct {
Imports interface{} `json:"imports"`
Resources []Resource `json:"resources"`
}
type IamBinding struct {
Members []string `type:"members`
Roles []string `type:"roles"`
}
type IamConf struct {
IamBindings []IamBinding `json:"bindings"`
}
type ApplyIamRequest struct {
Project string `json:"project"`
Cluster string `json:"cluster"`
Email string `json:"email"`
Token string `json:"token"`
Action string `json:"action`
}
var (
deploymentsStartedCounter = prometheus.NewCounter(prometheus.CounterOpts{
Name: "deployments_started",
Help: "Number of deployments kicked off",
})
)
func init() {
// Initialize prometheus counters
prometheus.MustRegister(deploymentsStartedCounter)
}
// TODO: handle concurrent & repetitive deployment requests.
func (s *ksServer) InsertDeployment(ctx context.Context, req CreateRequest) (*deploymentmanager.Deployment, error) {
regPath := s.knownRegistries["kubeflow"].RegUri
var dmconf DmConf
err := LoadConfig(path.Join(regPath, "../deployment/gke/deployment_manager_configs/cluster-kubeflow.yaml"), &dmconf)
if err == nil {
dmconf.Resources[0].Name = req.Name
dmconf.Resources[0].Properties["zone"] = req.Zone
dmconf.Resources[0].Properties["ipName"] = req.IpName
// https://cloud.google.com/kubernetes-engine/docs/reference/rest/v1/projects.zones.clusters
if s.gkeVersionOverride != "" {
dmconf.Resources[0].Properties["cluster-version"] = s.gkeVersionOverride
}
}
confByte, err := yaml.Marshal(dmconf)
if err != nil {
deployReqCounter.WithLabelValues("INTERNAL").Inc()
deploymentFailure.Inc()
return nil, err
}
templateData, err := ioutil.ReadFile(path.Join(regPath, "../deployment/gke/deployment_manager_configs/cluster.jinja"))
if err != nil {
deployReqCounter.WithLabelValues("INTERNAL").Inc()
deploymentFailure.Inc()
return nil, err
}
ts := oauth2.StaticTokenSource(&oauth2.Token{
AccessToken: req.Token,
})
deploymentmanagerService, err := deploymentmanager.New(oauth2.NewClient(ctx, ts))
if err != nil {
deployReqCounter.WithLabelValues("INTERNAL").Inc()
deploymentFailure.Inc()
return nil, err
}
rb := &deploymentmanager.Deployment{
Name: req.Name,
Target: &deploymentmanager.TargetConfiguration{
Config: &deploymentmanager.ConfigFile{
Content: string(confByte),
},
Imports: []*deploymentmanager.ImportFile{
{
Content: string(templateData),
Name: "cluster.jinja",
},
},
},
}
_, err = deploymentmanagerService.Deployments.Insert(req.Project, rb).Context(ctx).Do()
if err != nil {
// View deployment insert failure as INVALID_ARGUMENT.
deployReqCounter.WithLabelValues("INVALID_ARGUMENT").Inc()
return nil, err
}
deploymentsStartedCounter.Inc()
return rb, nil
}
func (s *ksServer) GetDeploymentStatus(ctx context.Context, req CreateRequest) (string, error) {
ts := oauth2.StaticTokenSource(&oauth2.Token{
AccessToken: req.Token,
})
deploymentmanagerService, err := deploymentmanager.New(oauth2.NewClient(ctx, ts))
if err != nil {
return "", err
}
dm, err := deploymentmanagerService.Deployments.Get(req.Project, req.Name).Context(ctx).Do()
if err != nil {
return "", err
}
return dm.Operation.Status, nil
}
// Clear existing bindings for auto-generated service accounts of current deployment.
// Those bindings could be leftover from previous actions.
func GetClearServiceAccountpolicy(currentPolicy *cloudresourcemanager.Policy, req ApplyIamRequest) cloudresourcemanager.Policy {
serviceAccounts := map[string]bool{
fmt.Sprintf("serviceAccount:%v-admin@%v.iam.gserviceaccount.com", req.Cluster, req.Project): true,
fmt.Sprintf("serviceAccount:%v-user@%v.iam.gserviceaccount.com", req.Cluster, req.Project): true,
fmt.Sprintf("serviceAccount:%v-vm@%v.iam.gserviceaccount.com", req.Cluster, req.Project): true,
}
newPolicy := cloudresourcemanager.Policy{}
for _, binding := range currentPolicy.Bindings {
newBinding := cloudresourcemanager.Binding{
Role: binding.Role,
}
for _, member := range binding.Members {
// Skip bindings for service accounts of current deployment.
// We'll reset bindings for them in following steps.
if _, ok := serviceAccounts[member]; !ok {
newBinding.Members = append(newBinding.Members, member)
}
}
newPolicy.Bindings = append(newPolicy.Bindings, &newBinding)
}
return newPolicy
}
func PrepareAccount(account string) string {
if strings.Contains(account, "iam.gserviceaccount.com") {
return "serviceAccount:" + account
}
if strings.Contains(account, "google-kubeflow-support") {
return "group:" + account
} else {
return "user:" + account
}
}
func GetUpdatedPolicy(currentPolicy *cloudresourcemanager.Policy, iamConf *IamConf, req ApplyIamRequest) cloudresourcemanager.Policy {
// map from role to members.
policyMap := map[string]map[string]bool{}
for _, binding := range currentPolicy.Bindings {
policyMap[binding.Role] = make(map[string]bool)
for _, member := range binding.Members {
policyMap[binding.Role][member] = true
}
}
// Replace placeholder with actual identity.
saMapping := map[string]string{
"set-kubeflow-admin-service-account": PrepareAccount(fmt.Sprintf("%v-admin@%v.iam.gserviceaccount.com", req.Cluster, req.Project)),
"set-kubeflow-user-service-account": PrepareAccount(fmt.Sprintf("%v-user@%v.iam.gserviceaccount.com", req.Cluster, req.Project)),
"set-kubeflow-vm-service-account": PrepareAccount(fmt.Sprintf("%v-vm@%v.iam.gserviceaccount.com", req.Cluster, req.Project)),
"set-kubeflow-iap-account": PrepareAccount(req.Email),
}
for _, binding := range iamConf.IamBindings {
for _, member := range binding.Members {
actualMember := member
if val, ok := saMapping[member]; ok {
actualMember = val
}
for _, role := range binding.Roles {
if _, ok := policyMap[role]; !ok {
policyMap[role] = make(map[string]bool)
}
if req.Action == "add" {
policyMap[role][actualMember] = true
} else {
// action == "remove"
policyMap[role][actualMember] = false
}
}
}
}
newPolicy := cloudresourcemanager.Policy{}
for role, memberSet := range policyMap {
binding := cloudresourcemanager.Binding{}
binding.Role = role
for member, exists := range memberSet {
if exists {
binding.Members = append(binding.Members, member)
}
}
newPolicy.Bindings = append(newPolicy.Bindings, &binding)
}
return newPolicy
}
func (s *ksServer) ApplyIamPolicy(ctx context.Context, req ApplyIamRequest) error {
// Get the iam change from config.
regPath := s.knownRegistries["kubeflow"].RegUri
templatePath := path.Join(regPath, "../deployment/gke/deployment_manager_configs/iam_bindings_template.yaml")
var iamConf IamConf
err := LoadConfig(templatePath, &iamConf)
if err != nil {
log.Errorf("Failed to load iam config: %v", err)
return err
}
ts := oauth2.StaticTokenSource(&oauth2.Token{
AccessToken: req.Token,
})
resourceManager, err := cloudresourcemanager.New(oauth2.NewClient(ctx, ts))
if err != nil {
log.Errorf("Cannot create resource manager client: %v", err)
return err
}
projLock := s.GetProjectLock(req.Project)
projLock.Lock()
defer projLock.Unlock()
exp := backoff.NewExponentialBackOff()
exp.InitialInterval = 2 * time.Second
exp.MaxInterval = 5 * time.Second
exp.MaxElapsedTime = time.Minute
exp.Reset()
err = backoff.Retry(func() error {
// Get current policy
saPolicy, err := resourceManager.Projects.GetIamPolicy(
req.Project,
&cloudresourcemanager.GetIamPolicyRequest{}).Do()
if err != nil {
log.Warningf("Cannot get current policy: %v", err)
return fmt.Errorf("Cannot get current policy: %v", err)
}
// Force update iam bindings of service accounts
clearedPolicy := GetClearServiceAccountpolicy(saPolicy, req)
_, err = resourceManager.Projects.SetIamPolicy(
req.Project,
&cloudresourcemanager.SetIamPolicyRequest{
Policy: &clearedPolicy,
}).Do()
if err != nil {
log.Warningf("Cannot set refresh policy: %v", err)
return fmt.Errorf("Cannot set refresh policy: %v", err)
}
// Get the updated policy and apply it.
newPolicy := GetUpdatedPolicy(saPolicy, &iamConf, req)
_, err = resourceManager.Projects.SetIamPolicy(
req.Project,
&cloudresourcemanager.SetIamPolicyRequest{
Policy: &newPolicy,
}).Do()
if err != nil {
log.Warningf("Cannot set new policy: %v", err)
return fmt.Errorf("Cannot set new policy: %v", err)
}
return nil
}, exp)
if err != nil {
return err
}
return nil
}