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cluster.go
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cluster.go
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package cluster
import (
"fmt"
"reflect"
"time"
"golang.org/x/net/context"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/tools/clientcmd"
"github.com/argoproj/argo-cd/common"
appv1 "github.com/argoproj/argo-cd/pkg/apis/application/v1alpha1"
"github.com/argoproj/argo-cd/server/rbacpolicy"
"github.com/argoproj/argo-cd/util"
"github.com/argoproj/argo-cd/util/cache"
"github.com/argoproj/argo-cd/util/db"
"github.com/argoproj/argo-cd/util/grpc"
"github.com/argoproj/argo-cd/util/kube"
"github.com/argoproj/argo-cd/util/rbac"
log "github.com/sirupsen/logrus"
)
// Server provides a Cluster service
type Server struct {
db db.ArgoDB
enf *rbac.Enforcer
cache cache.Cache
}
// NewServer returns a new instance of the Cluster service
func NewServer(db db.ArgoDB, enf *rbac.Enforcer, cache cache.Cache) *Server {
return &Server{
db: db,
enf: enf,
cache: cache,
}
}
const (
DefaultClusterStatusCacheExpiration = 1 * time.Hour
)
func (s *Server) getConnectionState(ctx context.Context, cluster appv1.Cluster) appv1.ConnectionState {
cacheKey := fmt.Sprintf("connection-state-%s", cluster.Server)
var connectionState appv1.ConnectionState
if err := s.cache.Get(cacheKey, &connectionState); err == nil {
return connectionState
}
now := v1.Now()
connectionState = appv1.ConnectionState{
Status: appv1.ConnectionStatusSuccessful,
ModifiedAt: &now,
}
config := cluster.RESTConfig()
config.Timeout = time.Second
kubeClientset, err := kubernetes.NewForConfig(config)
if err == nil {
_, err = kubeClientset.Discovery().ServerVersion()
}
if err != nil {
connectionState.Status = appv1.ConnectionStatusFailed
connectionState.Message = fmt.Sprintf("Unable to connect to cluster: %v", err)
}
err = s.cache.Set(&cache.Item{
Object: &connectionState,
Key: cacheKey,
Expiration: DefaultClusterStatusCacheExpiration,
})
if err != nil {
log.Warnf("getConnectionState cache set error %s: %v", cacheKey, err)
}
return connectionState
}
// List returns list of clusters
func (s *Server) List(ctx context.Context, q *ClusterQuery) (*appv1.ClusterList, error) {
clusterList, err := s.db.ListClusters(ctx)
if err != nil {
return nil, err
}
newItems := make([]appv1.Cluster, 0)
for _, clust := range clusterList.Items {
if s.enf.Enforce(ctx.Value("claims"), rbacpolicy.ResourceClusters, rbacpolicy.ActionGet, clust.Server) {
newItems = append(newItems, clust)
}
}
err = util.RunAllAsync(len(newItems), func(i int) error {
clust := newItems[i]
if clust.ConnectionState.Status == "" {
clust.ConnectionState = s.getConnectionState(ctx, clust)
}
newItems[i] = *redact(&clust)
return nil
})
if err != nil {
return nil, err
}
clusterList.Items = newItems
return clusterList, err
}
// Create creates a cluster
func (s *Server) Create(ctx context.Context, q *ClusterCreateRequest) (*appv1.Cluster, error) {
if !s.enf.Enforce(ctx.Value("claims"), rbacpolicy.ResourceClusters, rbacpolicy.ActionCreate, q.Cluster.Server) {
return nil, grpc.ErrPermissionDenied
}
c := q.Cluster
err := kube.TestConfig(q.Cluster.RESTConfig())
if err != nil {
return nil, err
}
c.ConnectionState = appv1.ConnectionState{Status: appv1.ConnectionStatusSuccessful}
clust, err := s.db.CreateCluster(ctx, c)
if status.Convert(err).Code() == codes.AlreadyExists {
// act idempotent if existing spec matches new spec
existing, getErr := s.db.GetCluster(ctx, c.Server)
if getErr != nil {
return nil, status.Errorf(codes.Internal, "unable to check existing cluster details: %v", getErr)
}
// cluster ConnectionState may differ, so make consistent before testing
existing.ConnectionState = c.ConnectionState
if reflect.DeepEqual(existing, c) {
clust, err = existing, nil
} else if q.Upsert {
return s.Update(ctx, &ClusterUpdateRequest{Cluster: c})
} else {
return nil, status.Errorf(codes.InvalidArgument, "existing cluster spec is different; use upsert flag to force update")
}
}
return redact(clust), err
}
// Create creates a cluster
func (s *Server) CreateFromKubeConfig(ctx context.Context, q *ClusterCreateFromKubeConfigRequest) (*appv1.Cluster, error) {
kubeconfig, err := clientcmd.Load([]byte(q.Kubeconfig))
if err != nil {
return nil, status.Errorf(codes.Internal, "Could not unmarshal kubeconfig: %v", err)
}
var clusterServer string
var clusterInsecure bool
if q.InCluster {
clusterServer = common.KubernetesInternalAPIServerAddr
} else if cluster, ok := kubeconfig.Clusters[q.Context]; ok {
clusterServer = cluster.Server
clusterInsecure = cluster.InsecureSkipTLSVerify
} else {
return nil, status.Errorf(codes.Internal, "Context %s does not exist in kubeconfig", q.Context)
}
c := &appv1.Cluster{
Server: clusterServer,
Name: q.Context,
Config: appv1.ClusterConfig{
TLSClientConfig: appv1.TLSClientConfig{
Insecure: clusterInsecure,
},
},
}
// Temporarily install RBAC resources for managing the cluster
clientset, err := kubernetes.NewForConfig(c.RESTConfig())
if err != nil {
return nil, status.Errorf(codes.Internal, "Could not create Kubernetes clientset: %v", err)
}
bearerToken, err := common.InstallClusterManagerRBAC(clientset)
if err != nil {
return nil, status.Errorf(codes.Internal, "Could not install cluster manager RBAC: %v", err)
}
c.Config.BearerToken = bearerToken
return s.Create(ctx, &ClusterCreateRequest{
Cluster: c,
Upsert: q.Upsert,
})
}
// Get returns a cluster from a query
func (s *Server) Get(ctx context.Context, q *ClusterQuery) (*appv1.Cluster, error) {
if !s.enf.Enforce(ctx.Value("claims"), rbacpolicy.ResourceClusters, rbacpolicy.ActionGet, q.Server) {
return nil, grpc.ErrPermissionDenied
}
clust, err := s.db.GetCluster(ctx, q.Server)
return redact(clust), err
}
// Update updates a cluster
func (s *Server) Update(ctx context.Context, q *ClusterUpdateRequest) (*appv1.Cluster, error) {
if !s.enf.Enforce(ctx.Value("claims"), rbacpolicy.ResourceClusters, rbacpolicy.ActionUpdate, q.Cluster.Server) {
return nil, grpc.ErrPermissionDenied
}
err := kube.TestConfig(q.Cluster.RESTConfig())
if err != nil {
return nil, err
}
clust, err := s.db.UpdateCluster(ctx, q.Cluster)
return redact(clust), err
}
// Delete deletes a cluster by name
func (s *Server) Delete(ctx context.Context, q *ClusterQuery) (*ClusterResponse, error) {
if !s.enf.Enforce(ctx.Value("claims"), rbacpolicy.ResourceClusters, rbacpolicy.ActionDelete, q.Server) {
return nil, grpc.ErrPermissionDenied
}
err := s.db.DeleteCluster(ctx, q.Server)
return &ClusterResponse{}, err
}
func redact(clust *appv1.Cluster) *appv1.Cluster {
if clust == nil {
return nil
}
clust.Config.Password = ""
clust.Config.BearerToken = ""
clust.Config.TLSClientConfig.KeyData = nil
return clust
}