/
psmdb_controller.go
564 lines (490 loc) · 17.9 KB
/
psmdb_controller.go
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package perconaservermongodb
import (
"context"
"fmt"
"time"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
policyv1beta1 "k8s.io/api/policy/v1beta1"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/api/meta"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/client/apiutil"
"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"
logf "sigs.k8s.io/controller-runtime/pkg/runtime/log"
"sigs.k8s.io/controller-runtime/pkg/source"
cm "github.com/jetstack/cert-manager/pkg/apis/certmanager/v1alpha1"
"github.com/percona/percona-server-mongodb-operator/clientcmd"
api "github.com/percona/percona-server-mongodb-operator/pkg/apis/psmdb/v1alpha1"
"github.com/percona/percona-server-mongodb-operator/pkg/psmdb"
"github.com/percona/percona-server-mongodb-operator/pkg/psmdb/backup"
"github.com/percona/percona-server-mongodb-operator/pkg/psmdb/secret"
"github.com/percona/percona-server-mongodb-operator/version"
)
var secretFileMode int32 = 288
var log = logf.Log.WithName("controller_psmdb")
// Add creates a new PerconaServerMongoDB 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) error {
r, err := newReconciler(mgr)
if err != nil {
return err
}
return add(mgr, r)
}
// newReconciler returns a new reconcile.Reconciler
func newReconciler(mgr manager.Manager) (reconcile.Reconciler, error) {
sv, err := version.Server()
if err != nil {
return nil, fmt.Errorf("get server version: %v", err)
}
log.Info("server version", "platform", sv.Platform, "version", sv.Info)
cli, err := clientcmd.NewClient()
if err != nil {
return nil, fmt.Errorf("create clientcmd: %v", err)
}
return &ReconcilePerconaServerMongoDB{
client: mgr.GetClient(),
scheme: mgr.GetScheme(),
serverVersion: sv,
reconcileIn: time.Second * 5,
clientcmd: cli,
}, nil
}
// add adds a new Controller to mgr with r as the reconcile.Reconciler
func add(mgr manager.Manager, r reconcile.Reconciler) error {
// Create a new controller
c, err := controller.New("psmdb-controller", mgr, controller.Options{Reconciler: r})
if err != nil {
return err
}
// Watch for changes to primary resource PerconaServerMongoDB
err = c.Watch(&source.Kind{Type: &api.PerconaServerMongoDB{}}, &handler.EnqueueRequestForObject{})
if err != nil {
return err
}
return nil
}
var _ reconcile.Reconciler = &ReconcilePerconaServerMongoDB{}
// ReconcilePerconaServerMongoDB reconciles a PerconaServerMongoDB object
type ReconcilePerconaServerMongoDB struct {
// This client, initialized using mgr.Client() above, is a split client
// that reads objects from the cache and writes to the apiserver
client client.Client
scheme *runtime.Scheme
clientcmd *clientcmd.Client
serverVersion *version.ServerVersion
reconcileIn time.Duration
}
// Reconcile reads that state of the cluster for a PerconaServerMongoDB object and makes changes based on the state read
// and what is in the PerconaServerMongoDB.Spec
// Note:
// 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 *ReconcilePerconaServerMongoDB) Reconcile(request reconcile.Request) (reconcile.Result, error) {
reqLogger := log.WithValues("Request.Namespace", request.Namespace, "Request.Name", request.Name)
reqLogger.Info("Reconciling PerconaServerMongoDB")
rr := reconcile.Result{
RequeueAfter: r.reconcileIn,
}
// Fetch the PerconaServerMongoDB instance
cr := &api.PerconaServerMongoDB{}
err := r.client.Get(context.TODO(), request.NamespacedName, cr)
if err != nil {
if errors.IsNotFound(err) {
// Request object not found, could have been deleted after reconcile request.
// Owned objects are automatically garbage collected. For additional cleanup logic use finalizers.
// Return and don't requeue
return reconcile.Result{}, nil
}
// Error reading the object - requeue the request.
return rr, err
}
err = cr.CheckNSetDefaults(r.serverVersion.Platform, log)
if err != nil {
return reconcile.Result{}, fmt.Errorf("wrong psmdb options: %v", err)
}
if !cr.Spec.UnsafeConf {
err = r.reconsileSSL(cr)
if err != nil {
return reconcile.Result{}, fmt.Errorf(`TLS secrets handler: "%v". Please create your TLS secrets `+cr.Spec.SSLSecretName+` and `+cr.Spec.SSLInternalSecretName+` manually or setup cert-manager correctly`, err)
}
}
internalKey := secret.InternalKeyMeta(cr.Name+"-mongodb-keyfile", cr.Namespace)
err = setControllerReference(cr, internalKey, r.scheme)
if err != nil {
return reconcile.Result{}, fmt.Errorf("set owner ref for InternalKey %s: %v", internalKey.Name, err)
}
err = r.client.Get(context.TODO(), types.NamespacedName{Name: cr.Name + "-mongodb-keyfile", Namespace: cr.Namespace}, internalKey)
if err != nil && errors.IsNotFound(err) {
reqLogger.Info("Creating a new internal mongo key", "Namespace", cr.Namespace, "Name", internalKey.Name)
internalKey.Data, err = secret.GenInternalKey()
if err != nil {
return reconcile.Result{}, fmt.Errorf("internal mongodb key generation: %v", err)
}
err = r.client.Create(context.TODO(), internalKey)
if err != nil {
return reconcile.Result{}, fmt.Errorf("create internal mongodb key: %v", err)
}
} else if err != nil {
return reconcile.Result{}, fmt.Errorf("get internal mongodb key: %v", err)
}
secrets := &corev1.Secret{}
err = r.client.Get(
context.TODO(),
types.NamespacedName{Name: cr.Spec.Secrets.Users, Namespace: cr.Namespace},
secrets,
)
if err != nil {
return reconcile.Result{}, fmt.Errorf("get mongodb secrets: %v", err)
}
bcpSfs, err := r.reconcileBackupCoordinator(cr)
if err != nil {
return reconcile.Result{}, fmt.Errorf("reconcile backup coordinator: %v", err)
}
if cr.Spec.Backup.Enabled {
err = r.reconcileBackupStorageConfig(cr, bcpSfs)
if err != nil {
return reconcile.Result{}, fmt.Errorf("reconcile backup storage config: %v", err)
}
err = r.reconcileBackupTasks(cr, bcpSfs)
if err != nil {
return reconcile.Result{}, fmt.Errorf("reconcile backup tasks: %v", err)
}
}
for i, replset := range cr.Spec.Replsets {
// multiple replica sets is not supported until sharding is
// added to the operator
if i > 0 {
reqLogger.Error(nil, "multiple replica sets is not yet supported, skipping replset %s", replset.Name)
continue
}
matchLabels := map[string]string{
"app.kubernetes.io/name": "percona-server-mongodb",
"app.kubernetes.io/instance": cr.Name,
"app.kubernetes.io/replset": replset.Name,
"app.kubernetes.io/managed-by": "percona-server-mongodb-operator",
"app.kubernetes.io/part-of": "percona-server-mongodb",
}
pods := &corev1.PodList{}
err := r.client.List(context.TODO(),
&client.ListOptions{
Namespace: cr.Namespace,
LabelSelector: labels.SelectorFromSet(matchLabels),
},
pods,
)
if err != nil {
return reconcile.Result{}, fmt.Errorf("get pods list for replset %s: %v", replset.Name, err)
}
_, err = r.reconcileStatefulSet(false, cr, replset, matchLabels, internalKey.Name)
if err != nil {
return reconcile.Result{}, fmt.Errorf("reconcile StatefulSet for %s: %v", replset.Name, err)
}
if replset.Arbiter.Enabled {
_, err := r.reconcileStatefulSet(true, cr, replset, matchLabels, internalKey.Name)
if err != nil {
return reconcile.Result{}, fmt.Errorf("reconcile Arbiter StatefulSet for %s: %v", replset.Name, err)
}
} else {
err := r.client.Delete(context.TODO(), psmdb.NewStatefulSet(
cr.Name+"-"+replset.Name+"-arbiter",
cr.Namespace,
))
if err != nil && !errors.IsNotFound(err) {
return reconcile.Result{}, fmt.Errorf("delete arbiter in replset %s: %v", replset.Name, err)
}
}
err = r.removeOudatedServices(cr, replset, pods)
if err != nil {
return reconcile.Result{}, fmt.Errorf("failed to remove old services of replset %s: %v", replset.Name, err)
}
// Create Service
if replset.Expose.Enabled {
srvs, err := r.ensureExternalServices(cr, replset, pods)
if err != nil {
return reconcile.Result{}, fmt.Errorf("failed to ensure services of replset %s: %v", replset.Name, err)
}
if replset.Expose.ExposeType == corev1.ServiceTypeLoadBalancer {
lbsvc := srvs[:0]
for _, svc := range srvs {
if len(svc.Status.LoadBalancer.Ingress) > 0 {
lbsvc = append(lbsvc, svc)
}
}
srvs = lbsvc
}
} else {
service := psmdb.Service(cr, replset)
err = setControllerReference(cr, service, r.scheme)
if err != nil {
return reconcile.Result{}, fmt.Errorf("set owner ref for Service %s: %v", service.Name, err)
}
err = r.client.Create(context.TODO(), service)
if err != nil && !errors.IsAlreadyExists(err) {
return reconcile.Result{}, fmt.Errorf("failed to create service for replset %s: %v", replset.Name, err)
}
}
var rstatus *api.ReplsetStatus
rstatus, ok := cr.Status.Replsets[replset.Name]
if !ok || rstatus == nil {
rstatus = &api.ReplsetStatus{Name: replset.Name}
cr.Status.Replsets[replset.Name] = rstatus
}
err = r.reconcileCluster(cr, replset, *pods, secrets)
if err != nil {
reqLogger.Error(err, "failed to reconcile cluster", "replset", replset.Name)
}
}
err = r.client.Update(context.TODO(), cr)
if err != nil {
return reconcile.Result{}, fmt.Errorf("update psmdb status: %v", err)
}
return rr, nil
}
func (r *ReconcilePerconaServerMongoDB) reconsileSSL(cr *api.PerconaServerMongoDB) error {
secretObj := corev1.Secret{}
err := r.client.Get(context.TODO(),
types.NamespacedName{
Namespace: cr.Namespace,
Name: cr.Spec.SSLSecretName,
},
&secretObj,
)
if err == nil {
return nil
} else if !errors.IsNotFound(err) {
return fmt.Errorf("get secret: %v", err)
}
issuerKind := "ClusterIssuer"
issuerName := cr.Name + "-psmdb-ca"
var certificateDNSNames []string
for _, replset := range cr.Spec.Replsets {
certificateDNSNames = append(certificateDNSNames,
cr.Name+"-"+replset.Name,
"*."+cr.Name+"-"+replset.Name,
)
}
issuer := cm.ClusterIssuer{}
issuer.Namespace = cr.Namespace
issuer.Kind = issuerKind
issuer.Name = issuerName
issuer.Spec.SelfSigned = &cm.SelfSignedIssuer{}
err = r.client.Create(context.TODO(), &issuer)
if err != nil && !errors.IsAlreadyExists(err) {
return fmt.Errorf("create issuer: %v", err)
}
certificate := cm.Certificate{}
certificate.Namespace = cr.Namespace
certificate.Kind = "Certificate"
certificate.Name = cr.Spec.SSLSecretName
certificate.Spec.SecretName = cr.Spec.SSLSecretName
certificate.Spec.CommonName = cr.Name
certificate.Spec.DNSNames = certificateDNSNames
certificate.Spec.IsCA = true
certificate.Spec.IssuerRef.Name = issuerName
certificate.Spec.IssuerRef.Kind = issuerKind
err = r.client.Create(context.TODO(), &certificate)
if err != nil && !errors.IsAlreadyExists(err) {
return fmt.Errorf("create certificate: %v", err)
}
if cr.Spec.SSLSecretName == cr.Spec.SSLInternalSecretName {
return nil
}
intCertificate := cm.Certificate{}
intCertificate.Namespace = cr.Namespace
intCertificate.Kind = "Certificate"
intCertificate.Name = cr.Spec.SSLInternalSecretName
intCertificate.Spec.SecretName = cr.Spec.SSLInternalSecretName
intCertificate.Spec.CommonName = cr.Name
intCertificate.Spec.DNSNames = certificateDNSNames
intCertificate.Spec.IsCA = true
intCertificate.Spec.IssuerRef.Name = issuerName
intCertificate.Spec.IssuerRef.Kind = issuerKind
err = r.client.Create(context.TODO(), &intCertificate)
if err != nil && !errors.IsAlreadyExists(err) {
return fmt.Errorf("create internal certificate: %v", err)
}
return nil
}
// TODO: reduce cyclomatic complexity
func (r *ReconcilePerconaServerMongoDB) reconcileStatefulSet(arbiter bool, cr *api.PerconaServerMongoDB, replset *api.ReplsetSpec, matchLabels map[string]string, internalKeyName string) (*appsv1.StatefulSet, error) {
sfsName := cr.Name + "-" + replset.Name
size := replset.Size
containerName := "mongod"
matchLabels["app.kubernetes.io/component"] = "mongod"
multiAZ := replset.MultiAZ
pdbspec := replset.PodDisruptionBudget
if arbiter {
sfsName += "-arbiter"
containerName += "-arbiter"
size = replset.Arbiter.Size
matchLabels["app.kubernetes.io/component"] = "arbiter"
multiAZ = replset.Arbiter.MultiAZ
pdbspec = replset.Arbiter.PodDisruptionBudget
}
sfs := psmdb.NewStatefulSet(sfsName, cr.Namespace)
err := setControllerReference(cr, sfs, r.scheme)
if err != nil {
return nil, fmt.Errorf("set owner ref for StatefulSet %s: %v", sfs.Name, err)
}
errGet := r.client.Get(context.TODO(), types.NamespacedName{Name: sfs.Name, Namespace: sfs.Namespace}, sfs)
if errGet != nil && !errors.IsNotFound(errGet) {
return nil, fmt.Errorf("get StatefulSet %s: %v", sfs.Name, err)
}
sfsSpec, err := psmdb.StatefulSpec(cr, replset, containerName, matchLabels, multiAZ, size, internalKeyName, r.serverVersion)
if err != nil {
return nil, fmt.Errorf("create StatefulSet.Spec %s: %v", sfs.Name, err)
}
// add TLS/SSL Volume
sfsSpec.Template.Spec.Volumes = append(sfsSpec.Template.Spec.Volumes,
corev1.Volume{
Name: "ssl",
VolumeSource: corev1.VolumeSource{
Secret: &corev1.SecretVolumeSource{
SecretName: cr.Spec.SSLSecretName,
Optional: &cr.Spec.UnsafeConf,
DefaultMode: &secretFileMode,
},
},
},
corev1.Volume{
Name: "ssl-internal",
VolumeSource: corev1.VolumeSource{
Secret: &corev1.SecretVolumeSource{
SecretName: cr.Spec.SSLInternalSecretName,
Optional: &cr.Spec.UnsafeConf,
DefaultMode: &secretFileMode,
},
},
},
)
if arbiter {
sfsSpec.Template.Spec.Volumes = append(sfsSpec.Template.Spec.Volumes,
corev1.Volume{
Name: psmdb.MongodDataVolClaimName,
VolumeSource: corev1.VolumeSource{
EmptyDir: &corev1.EmptyDirVolumeSource{},
},
},
)
} else {
if replset.VolumeSpec.PersistentVolumeClaim != nil {
sfsSpec.VolumeClaimTemplates = []corev1.PersistentVolumeClaim{
psmdb.PersistentVolumeClaim(psmdb.MongodDataVolClaimName, cr.Namespace, replset.VolumeSpec.PersistentVolumeClaim),
}
} else {
sfsSpec.Template.Spec.Volumes = append(sfsSpec.Template.Spec.Volumes,
corev1.Volume{
Name: psmdb.MongodDataVolClaimName,
VolumeSource: corev1.VolumeSource{
HostPath: replset.VolumeSpec.HostPath,
EmptyDir: replset.VolumeSpec.EmptyDir,
},
},
)
}
if cr.Spec.Backup.Enabled {
sfsSpec.Template.Spec.Containers = append(sfsSpec.Template.Spec.Containers, backup.AgentContainer(cr, r.serverVersion))
sfsSpec.Template.Spec.Volumes = append(sfsSpec.Template.Spec.Volumes, backup.AgentVolume(cr.Name))
}
if cr.Spec.PMM.Enabled {
sfsSpec.Template.Spec.Containers = append(sfsSpec.Template.Spec.Containers, psmdb.PMMContainer(cr.Spec.PMM, cr.Spec.Secrets.Users))
}
}
if errors.IsNotFound(errGet) {
sfs.Spec = sfsSpec
err = r.client.Create(context.TODO(), sfs)
if err != nil && !errors.IsAlreadyExists(err) {
return nil, fmt.Errorf("create StatefulSet %s: %v", sfs.Name, err)
}
} else {
err := r.reconcilePDB(pdbspec, matchLabels, cr.Namespace, sfs)
if err != nil {
return nil, fmt.Errorf("PodDisruptionBudget for %s: %v", sfs.Name, err)
}
sfs.Spec.Replicas = &size
sfs.Spec.Template.Spec.Containers = sfsSpec.Template.Spec.Containers
sfs.Spec.Template.Spec.Volumes = sfsSpec.Template.Spec.Volumes
err = r.client.Update(context.TODO(), sfs)
if err != nil {
return nil, fmt.Errorf("update StatefulSet %s: %v", sfs.Name, err)
}
}
return sfs, nil
}
func (r *ReconcilePerconaServerMongoDB) reconcilePDB(spec *api.PodDisruptionBudgetSpec, labels map[string]string, namespace string, owner runtime.Object) error {
if spec == nil {
return nil
}
pdb := psmdb.PodDisruptionBudget(spec, labels, namespace)
err := setControllerReference(owner, pdb, r.scheme)
if err != nil {
return fmt.Errorf("set owner reference: %v", err)
}
cpdb := &policyv1beta1.PodDisruptionBudget{}
err = r.client.Get(context.TODO(), types.NamespacedName{Name: pdb.Name, Namespace: namespace}, cpdb)
if err != nil && errors.IsNotFound(err) {
return r.client.Create(context.TODO(), pdb)
} else if err != nil {
return fmt.Errorf("get: %v", err)
}
cpdb.Spec = pdb.Spec
return r.client.Update(context.TODO(), cpdb)
}
func (r *ReconcilePerconaServerMongoDB) createOrUpdate(currentObj runtime.Object, name, namespace string) error {
ctx := context.TODO()
foundObj := currentObj.DeepCopyObject()
err := r.client.Get(ctx,
types.NamespacedName{Name: name, Namespace: namespace},
foundObj)
if err != nil && errors.IsNotFound(err) {
err := r.client.Create(ctx, currentObj)
if err != nil {
return fmt.Errorf("create: %v", err)
}
return nil
} else if err != nil {
return fmt.Errorf("get: %v", err)
}
currentObj.GetObjectKind().SetGroupVersionKind(foundObj.GetObjectKind().GroupVersionKind())
err = r.client.Update(ctx, currentObj)
if err != nil {
return fmt.Errorf("update: %v", err)
}
return nil
}
func setControllerReference(owner runtime.Object, obj metav1.Object, scheme *runtime.Scheme) error {
ownerRef, err := OwnerRef(owner, scheme)
if err != nil {
return err
}
obj.SetOwnerReferences(append(obj.GetOwnerReferences(), ownerRef))
return nil
}
// OwnerRef returns OwnerReference to object
func OwnerRef(ro runtime.Object, scheme *runtime.Scheme) (metav1.OwnerReference, error) {
gvk, err := apiutil.GVKForObject(ro, scheme)
if err != nil {
return metav1.OwnerReference{}, err
}
trueVar := true
ca, err := meta.Accessor(ro)
if err != nil {
return metav1.OwnerReference{}, err
}
return metav1.OwnerReference{
APIVersion: gvk.GroupVersion().String(),
Kind: gvk.Kind,
Name: ca.GetName(),
UID: ca.GetUID(),
Controller: &trueVar,
}, nil
}