/
controller.go
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/
controller.go
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/*
Copyright 2020 The Rook Authors. All rights reserved.
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 rbd
import (
"context"
"fmt"
"reflect"
"strings"
"github.com/coreos/pkg/capnslog"
"github.com/pkg/errors"
cephv1 "github.com/rook/rook/pkg/apis/ceph.rook.io/v1"
"github.com/rook/rook/pkg/clusterd"
cephclient "github.com/rook/rook/pkg/daemon/ceph/client"
"github.com/rook/rook/pkg/operator/ceph/cluster/mon"
opconfig "github.com/rook/rook/pkg/operator/ceph/config"
opcontroller "github.com/rook/rook/pkg/operator/ceph/controller"
"github.com/rook/rook/pkg/operator/ceph/reporting"
"github.com/rook/rook/pkg/operator/k8sutil"
appsv1 "k8s.io/api/apps/v1"
v1 "k8s.io/api/core/v1"
kerrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller"
"sigs.k8s.io/controller-runtime/pkg/handler"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
"sigs.k8s.io/controller-runtime/pkg/source"
)
const (
controllerName = "ceph-rbd-mirror-controller"
)
var logger = capnslog.NewPackageLogger("github.com/rook/rook", controllerName)
// List of object resources to watch by the controller
var objectsToWatch = []client.Object{
&v1.Service{TypeMeta: metav1.TypeMeta{Kind: "Service", APIVersion: v1.SchemeGroupVersion.String()}},
&v1.ConfigMap{TypeMeta: metav1.TypeMeta{Kind: "ConfigMap", APIVersion: v1.SchemeGroupVersion.String()}},
&appsv1.Deployment{TypeMeta: metav1.TypeMeta{Kind: "Deployment", APIVersion: appsv1.SchemeGroupVersion.String()}},
}
var cephRBDMirrorKind = reflect.TypeOf(cephv1.CephRBDMirror{}).Name()
// Sets the type meta for the controller main object
var controllerTypeMeta = metav1.TypeMeta{
Kind: cephRBDMirrorKind,
APIVersion: fmt.Sprintf("%s/%s", cephv1.CustomResourceGroup, cephv1.Version),
}
// ReconcileCephRBDMirror reconciles a cephRBDMirror object
type ReconcileCephRBDMirror struct {
context *clusterd.Context
clusterInfo *cephclient.ClusterInfo
client client.Client
scheme *runtime.Scheme
cephClusterSpec *cephv1.ClusterSpec
peers map[string]*peerSpec
}
// peerSpec represents peer details
type peerSpec struct {
info *cephv1.PoolMirroringInfo
poolName string
direction string
}
// Add creates a new cephRBDMirror Controller and adds it to the Manager. The Manager will set fields on the Controller
// and Start it when the Manager is Started.
func Add(mgr manager.Manager, context *clusterd.Context) error {
return add(mgr, newReconciler(mgr, context))
}
// newReconciler returns a new reconcile.Reconciler
func newReconciler(mgr manager.Manager, context *clusterd.Context) reconcile.Reconciler {
// Add the cephv1 scheme to the manager scheme so that the controller knows about it
mgrScheme := mgr.GetScheme()
if err := cephv1.AddToScheme(mgr.GetScheme()); err != nil {
panic(err)
}
return &ReconcileCephRBDMirror{
client: mgr.GetClient(),
scheme: mgrScheme,
context: context,
peers: make(map[string]*peerSpec),
}
}
func add(mgr manager.Manager, r reconcile.Reconciler) error {
// Create a new controller
c, err := controller.New(controllerName, mgr, controller.Options{Reconciler: r})
if err != nil {
return err
}
logger.Info("successfully started")
// Watch for changes on the cephRBDMirror CRD object
err = c.Watch(&source.Kind{Type: &cephv1.CephRBDMirror{TypeMeta: controllerTypeMeta}}, &handler.EnqueueRequestForObject{}, opcontroller.WatchControllerPredicate())
if err != nil {
return err
}
// Watch all other resources
for _, t := range objectsToWatch {
err = c.Watch(&source.Kind{Type: t}, &handler.EnqueueRequestForOwner{
IsController: true,
OwnerType: &cephv1.CephRBDMirror{},
}, opcontroller.WatchPredicateForNonCRDObject(&cephv1.CephRBDMirror{TypeMeta: controllerTypeMeta}, mgr.GetScheme()))
if err != nil {
return err
}
}
// Build Handler function to return the list of ceph rbd-mirror
// This is used by the watchers below
handlerFunc, err := opcontroller.ObjectToCRMapper(mgr.GetClient(), &cephv1.CephRBDMirrorList{}, mgr.GetScheme())
if err != nil {
return err
}
// Watch for CephCluster Spec changes that we want to propagate to us
err = c.Watch(&source.Kind{Type: &cephv1.CephCluster{
TypeMeta: metav1.TypeMeta{
Kind: opcontroller.ClusterResource.Kind,
APIVersion: opcontroller.ClusterResource.APIVersion,
},
},
}, handler.EnqueueRequestsFromMapFunc(handlerFunc), opcontroller.WatchCephClusterPredicate())
if err != nil {
return err
}
return nil
}
// Reconcile reads that state of the cluster for a cephRBDMirror object and makes changes based on the state read
// and what is in the cephRBDMirror.Spec
// The Controller will requeue the Request to be processed again if the returned error is non-nil or
// Result.Requeue is true, otherwise upon completion it will remove the work from the queue.
func (r *ReconcileCephRBDMirror) Reconcile(context context.Context, request reconcile.Request) (reconcile.Result, error) {
// workaround because the rook logging mechanism is not compatible with the controller-runtime logging interface
reconcileResponse, err := r.reconcile(request)
if err != nil {
updateStatus(r.client, request.NamespacedName, k8sutil.FailedStatus)
logger.Errorf("failed to reconcile %v", err)
}
return reconcileResponse, err
}
func (r *ReconcileCephRBDMirror) reconcile(request reconcile.Request) (reconcile.Result, error) {
// Fetch the cephRBDMirror instance
cephRBDMirror := &cephv1.CephRBDMirror{}
err := r.client.Get(context.TODO(), request.NamespacedName, cephRBDMirror)
if err != nil {
if kerrors.IsNotFound(err) {
logger.Debug("cephRBDMirror resource not found. Ignoring since object must be deleted.")
return reconcile.Result{}, nil
}
// Error reading the object - requeue the request.
return reconcile.Result{}, errors.Wrap(err, "failed to get cephRBDMirror")
}
// The CR was just created, initializing status fields
if cephRBDMirror.Status == nil {
updateStatus(r.client, request.NamespacedName, k8sutil.EmptyStatus)
}
// validate the pool settings
if err := validateSpec(&cephRBDMirror.Spec); err != nil {
return opcontroller.ImmediateRetryResult, errors.Wrapf(err, "invalid rbd-mirror CR %q spec", cephRBDMirror.Name)
}
// Make sure a CephCluster is present otherwise do nothing
cephCluster, isReadyToReconcile, _, reconcileResponse := opcontroller.IsReadyToReconcile(r.client, request.NamespacedName, controllerName)
if !isReadyToReconcile {
logger.Debugf("CephCluster resource not ready in namespace %q, retrying in %q.", request.NamespacedName.Namespace, reconcileResponse.RequeueAfter.String())
return reconcileResponse, nil
}
r.cephClusterSpec = &cephCluster.Spec
// Populate clusterInfo
// Always populate it during each reconcile
r.clusterInfo, _, _, err = mon.LoadClusterInfo(r.context, request.NamespacedName.Namespace)
if err != nil {
return opcontroller.ImmediateRetryResult, errors.Wrap(err, "failed to populate cluster info")
}
// Populate CephVersion
daemon := string(opconfig.MonType)
currentCephVersion, err := cephclient.LeastUptodateDaemonVersion(r.context, r.clusterInfo, daemon)
if err != nil {
if strings.Contains(err.Error(), opcontroller.UninitializedCephConfigError) {
logger.Info(opcontroller.OperatorNotInitializedMessage)
return opcontroller.WaitForRequeueIfOperatorNotInitialized, nil
}
return opcontroller.ImmediateRetryResult, errors.Wrapf(err, "failed to retrieve current ceph %q version", daemon)
}
r.clusterInfo.CephVersion = currentCephVersion
// Add bootstrap peer if any
logger.Debug("reconciling ceph rbd mirror peers addition")
reconcileResponse, err = r.reconcileAddBoostrapPeer(cephRBDMirror, request.NamespacedName)
if err != nil {
return opcontroller.ImmediateRetryResult, errors.Wrap(err, "failed to add ceph rbd mirror peer")
}
// CREATE/UPDATE
logger.Debug("reconciling ceph rbd mirror deployments")
reconcileResponse, err = r.reconcileCreateCephRBDMirror(cephRBDMirror)
if err != nil {
return opcontroller.ImmediateRetryResult, errors.Wrap(err, "failed to create ceph rbd mirror deployments")
}
// Set Ready status, we are done reconciling
updateStatus(r.client, request.NamespacedName, k8sutil.ReadyStatus)
// Return and do not requeue
logger.Debug("done reconciling ceph rbd mirror")
return reconcile.Result{}, nil
}
func (r *ReconcileCephRBDMirror) reconcileCreateCephRBDMirror(cephRBDMirror *cephv1.CephRBDMirror) (reconcile.Result, error) {
if r.cephClusterSpec.External.Enable {
_, err := opcontroller.ValidateCephVersionsBetweenLocalAndExternalClusters(r.context, r.clusterInfo)
if err != nil {
// This handles the case where the operator is running, the external cluster has been upgraded and a CR creation is called
// If that's a major version upgrade we fail, if it's a minor version, we continue, it's not ideal but not critical
return opcontroller.ImmediateRetryResult, errors.Wrap(err, "refusing to run new crd")
}
}
err := r.start(cephRBDMirror)
if err != nil {
return opcontroller.ImmediateRetryResult, errors.Wrap(err, "failed to start rbd mirror")
}
return reconcile.Result{}, nil
}
// updateStatus updates an object with a given status
func updateStatus(client client.Client, name types.NamespacedName, status string) {
rbdMirror := &cephv1.CephRBDMirror{}
err := client.Get(context.TODO(), name, rbdMirror)
if err != nil {
if kerrors.IsNotFound(err) {
logger.Debug("CephRBDMirror resource not found. Ignoring since object must be deleted.")
return
}
logger.Warningf("failed to retrieve rbd mirror %q to update status to %q. %v", name, status, err)
return
}
if rbdMirror.Status == nil {
rbdMirror.Status = &cephv1.Status{}
}
rbdMirror.Status.Phase = status
if err := reporting.UpdateStatus(client, rbdMirror); err != nil {
logger.Errorf("failed to set rbd mirror %q status to %q. %v", rbdMirror.Name, status, err)
return
}
logger.Debugf("rbd mirror %q status updated to %q", name, status)
}