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handler_multiclusterapp.go
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handler_multiclusterapp.go
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package multiclusterapp
import (
"context"
"fmt"
"strings"
"github.com/rancher/rancher/pkg/clustermanager"
"github.com/rancher/rancher/pkg/controllers/management/globalnamespacerbac"
"github.com/rancher/rancher/pkg/namespace"
"github.com/rancher/rancher/pkg/ref"
v3 "github.com/rancher/types/apis/management.cattle.io/v3"
"github.com/rancher/types/config"
"github.com/rancher/types/user"
apierrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/api/meta"
v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/client-go/tools/cache"
)
type MCAppController struct {
multiClusterApps v3.MultiClusterAppInterface
managementContext *config.ManagementContext
prtbs v3.ProjectRoleTemplateBindingInterface
prtbLister v3.ProjectRoleTemplateBindingLister
crtbs v3.ClusterRoleTemplateBindingInterface
crtbLister v3.ClusterRoleTemplateBindingLister
rtLister v3.RoleTemplateLister
gDNSs v3.GlobalDNSInterface
users v3.UserInterface
userManager user.Manager
}
type MCAppRevisionController struct {
managementContext *config.ManagementContext
}
type ProjectController struct {
mcAppsLister v3.MultiClusterAppLister
mcApps v3.MultiClusterAppInterface
projectLister v3.ProjectLister
}
type ClusterController struct {
mcAppsLister v3.MultiClusterAppLister
mcApps v3.MultiClusterAppInterface
clusterLister v3.ClusterLister
}
func Register(ctx context.Context, management *config.ManagementContext, clusterManager *clustermanager.Manager) {
mcApps := management.Management.MultiClusterApps("")
m := MCAppController{
multiClusterApps: mcApps,
managementContext: management,
prtbs: management.Management.ProjectRoleTemplateBindings(""),
prtbLister: management.Management.ProjectRoleTemplateBindings("").Controller().Lister(),
crtbs: management.Management.ClusterRoleTemplateBindings(""),
crtbLister: management.Management.ClusterRoleTemplateBindings("").Controller().Lister(),
rtLister: management.Management.RoleTemplates("").Controller().Lister(),
gDNSs: management.Management.GlobalDNSs(""),
userManager: management.UserManager,
users: management.Management.Users(""),
}
r := MCAppRevisionController{
managementContext: management,
}
projects := management.Management.Projects("")
p := ProjectController{
mcAppsLister: mcApps.Controller().Lister(),
mcApps: mcApps,
projectLister: projects.Controller().Lister(),
}
clusters := management.Management.Clusters("")
c := ClusterController{
mcAppsLister: mcApps.Controller().Lister(),
mcApps: mcApps,
clusterLister: clusters.Controller().Lister(),
}
m.multiClusterApps.AddHandler(ctx, "management-multiclusterapp-rbac-controller", m.sync)
management.Management.MultiClusterAppRevisions("").AddHandler(ctx, "management-multiclusterapp-revisions-rbac", r.sync)
projects.AddHandler(ctx, "management-mcapp-project-controller", p.sync)
clusters.AddHandler(ctx, "management-mcapp-cluster-controller", c.sync)
StartMCAppStateController(ctx, management)
StartMCAppManagementController(ctx, management, clusterManager)
StartMCAppEnqueueController(ctx, management)
}
func (mc *MCAppController) sync(key string, mcapp *v3.MultiClusterApp) (runtime.Object, error) {
if mcapp == nil || mcapp.DeletionTimestamp != nil {
// multiclusterapp is being deleted, remove the sys acc created for it
_, mcappName, err := cache.SplitMetaNamespaceKey(key)
if err != nil {
return nil, err
}
u, err := mc.userManager.GetUserByPrincipalID(fmt.Sprintf("system://%s", mcappName))
if err != nil {
return nil, err
}
if u == nil {
// user not found, must have been removed
return nil, nil
}
if err := mc.users.Delete(u.Name, &v1.DeleteOptions{}); err != nil && !apierrors.IsNotFound(err) && !apierrors.IsGone(err) {
return nil, err
}
return nil, nil
}
metaAccessor, err := meta.Accessor(mcapp)
if err != nil {
return mcapp, err
}
creatorID, ok := metaAccessor.GetAnnotations()[globalnamespacerbac.CreatorIDAnn]
if !ok {
return mcapp, fmt.Errorf("MultiClusterApp %v has no creatorId annotation. Cannot create apps for %v", metaAccessor.GetName(), mcapp.Name)
}
systemUserPrincipalID := fmt.Sprintf("system://%s", mcapp.Name)
systemUser, err := mc.userManager.EnsureUser(systemUserPrincipalID, "System account for Multiclusterapp "+mcapp.Name)
if err != nil {
return nil, err
}
var prtbName, crtbName string
// create PRTBs with this service account for all roles of multiclusterapp
for _, r := range mcapp.Spec.Roles {
rt, err := mc.rtLister.Get("", r)
if err != nil {
return nil, err
}
for _, p := range mcapp.Spec.Targets {
if p.ProjectName == "" {
continue
}
split := strings.SplitN(p.ProjectName, ":", 2)
if len(split) != 2 {
return nil, fmt.Errorf("invalid project name")
}
clusterName := split[0]
projectName := split[1]
if rt.Context == "project" {
prtbName = mcapp.Name + "-" + r
// check if these prtbs already exist
if err = mc.createPrtb(projectName, p.ProjectName, prtbName, r, systemUser.Name, systemUserPrincipalID); err != nil {
return nil, err
}
} else if rt.Context == "cluster" {
crtbName = mcapp.Name + "-" + r
mc.createCrtb(clusterName, crtbName, r, systemUser.Name, systemUserPrincipalID)
}
}
}
if err := globalnamespacerbac.CreateRoleAndRoleBinding(globalnamespacerbac.MultiClusterAppResource, mcapp.Name, mcapp.UID,
mcapp.Spec.Members, creatorID, mc.managementContext); err != nil {
return nil, err
}
return nil, nil
}
func (r *MCAppRevisionController) sync(key string, mcappRevision *v3.MultiClusterAppRevision) (runtime.Object, error) {
if mcappRevision == nil || mcappRevision.DeletionTimestamp != nil {
return mcappRevision, nil
}
metaAccessor, err := meta.Accessor(mcappRevision)
if err != nil {
return mcappRevision, err
}
creatorID, ok := metaAccessor.GetAnnotations()[globalnamespacerbac.CreatorIDAnn]
if !ok {
return mcappRevision, fmt.Errorf("mcapp revision %v has no creatorId annotation", mcappRevision.Name)
}
if err := globalnamespacerbac.CreateRoleAndRoleBinding(
globalnamespacerbac.MultiClusterAppRevisionResource, mcappRevision.Name, mcappRevision.UID, []v3.Member{}, creatorID,
r.managementContext); err != nil {
return nil, err
}
return mcappRevision, nil
}
func (p *ProjectController) sync(key string, project *v3.Project) (runtime.Object, error) {
if project != nil && project.DeletionTimestamp == nil {
return project, nil
}
splitKey := strings.SplitN(key, "/", 2)
if len(splitKey) != 2 || splitKey[0] == "" || splitKey[1] == "" {
return project, fmt.Errorf("invalid project id %s", key)
}
clusterName, projectName := splitKey[0], splitKey[1]
key = fmt.Sprintf("%s:%s", clusterName, projectName)
mcApps, err := p.mcAppsLister.List(namespace.GlobalNamespace, labels.NewSelector())
if err != nil {
return project, err
}
for _, mcApp := range mcApps {
if mcApp.DeletionTimestamp != nil {
continue
}
var toUpdate *v3.MultiClusterApp
for i, target := range mcApp.Spec.Targets {
if target.ProjectName == key {
toUpdate = mcApp.DeepCopy()
toUpdate.Spec.Targets = append(toUpdate.Spec.Targets[:i], toUpdate.Spec.Targets[i+1:]...)
p.updateAnswersForProject(key, toUpdate)
break
}
}
if toUpdate != nil {
if _, err := p.mcApps.Update(toUpdate); err != nil {
return project, fmt.Errorf("error updating mcapp %s for project %s", mcApp.Name, key)
}
}
}
return project, nil
}
func (p *ProjectController) updateAnswersForProject(projectName string, mcapp *v3.MultiClusterApp) {
for i := len(mcapp.Spec.Answers) - 1; i >= 0; i-- {
if mcapp.Spec.Answers[i].ProjectName == projectName {
mcapp.Spec.Answers = append(mcapp.Spec.Answers[:i], mcapp.Spec.Answers[i+1:]...)
break
}
}
}
func (c *ClusterController) sync(key string, cluster *v3.Cluster) (runtime.Object, error) {
if cluster != nil && cluster.DeletionTimestamp == nil {
return cluster, nil
}
mcApps, err := c.mcAppsLister.List(namespace.GlobalNamespace, labels.NewSelector())
if err != nil {
return cluster, err
}
for _, mcApp := range mcApps {
if mcApp.DeletionTimestamp != nil {
continue
}
var toUpdate *v3.MultiClusterApp
for i := len(mcApp.Spec.Targets) - 1; i >= 0; i-- {
clusterName, _ := ref.Parse(mcApp.Spec.Targets[i].ProjectName)
if clusterName == key {
if toUpdate == nil {
toUpdate = mcApp.DeepCopy()
}
toUpdate.Spec.Targets = append(toUpdate.Spec.Targets[:i], toUpdate.Spec.Targets[i+1:]...)
}
}
if toUpdate != nil {
c.updateAnswersForCluster(key, toUpdate)
if _, err := c.mcApps.Update(toUpdate); err != nil {
return cluster, fmt.Errorf("error updating mcapp %s for cluster %s", mcApp.Name, key)
}
}
}
return cluster, nil
}
func (c *ClusterController) updateAnswersForCluster(clusterName string, mcapp *v3.MultiClusterApp) {
for i := len(mcapp.Spec.Answers) - 1; i >= 0; i-- {
projClusterName, _ := ref.Parse(mcapp.Spec.Answers[i].ProjectName)
if mcapp.Spec.Answers[i].ClusterName == clusterName || projClusterName == clusterName {
mcapp.Spec.Answers = append(mcapp.Spec.Answers[:i], mcapp.Spec.Answers[i+1:]...)
}
}
}
func (mc *MCAppController) createPrtb(projectName, projectID, prtbName, roleTemplateName, systemUserName, systemUserPrincipalID string) error {
_, err := mc.prtbLister.Get(projectName, prtbName)
if err != nil {
if apierrors.IsNotFound(err) {
_, err := mc.prtbs.Create(&v3.ProjectRoleTemplateBinding{
ObjectMeta: v1.ObjectMeta{
Name: prtbName,
Namespace: projectName,
},
UserName: systemUserName,
UserPrincipalName: systemUserPrincipalID,
RoleTemplateName: roleTemplateName,
ProjectName: projectID,
})
if err != nil && !apierrors.IsAlreadyExists(err) {
return err
}
} else {
return err
}
}
return nil
}
func (mc *MCAppController) createCrtb(clusterName, crtbName, roleTemplateName, systemUserName, systemUserPrincipalID string) error {
_, err := mc.crtbLister.Get(clusterName, crtbName)
if err != nil {
if apierrors.IsNotFound(err) {
_, err := mc.crtbs.Create(&v3.ClusterRoleTemplateBinding{
ObjectMeta: v1.ObjectMeta{
Name: crtbName,
Namespace: clusterName,
},
UserName: systemUserName,
UserPrincipalName: systemUserPrincipalID,
RoleTemplateName: roleTemplateName,
ClusterName: clusterName,
})
if err != nil && !apierrors.IsAlreadyExists(err) {
return err
}
} else {
return err
}
}
return nil
}