Rohan CJ
4072d14557
pending releas notes for managed PDBs. Signed-off-by: Rohan CJ <rohantmp@gmail.com>
72 lines
2.2 KiB
Go
72 lines
2.2 KiB
Go
/*
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Copyright 2019 The Rook Authors. All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package clusterdisruption
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import (
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"fmt"
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"math"
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cephv1 "github.com/rook/rook/pkg/apis/ceph.rook.io/v1"
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"github.com/rook/rook/pkg/operator/ceph/cluster/mon"
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"github.com/rook/rook/pkg/operator/k8sutil"
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policyv1beta1 "k8s.io/api/policy/v1beta1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/types"
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"k8s.io/apimachinery/pkg/util/intstr"
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)
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const (
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pdbName = "rook-ceph-mon-pdb"
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)
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// setting minAvailable for mons at floor((n+1)/2) an logging and error if n is even
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// monCount - minAvailable
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// 1,2 - 0 (no HA)
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// even - n -1
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// odd - floor((n+1)/2)
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func (r *ReconcileClusterDisruption) reconcileMonPDB(cephCluster *cephv1.CephCluster) error {
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monCount := cephCluster.Spec.Mon.Count
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minAvailable := int32(math.Floor(float64((monCount + 1) / 2)))
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if monCount%2 == 0 {
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logger.Error("mon count should be an odd number, setting effective maxUnvailable to 1")
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minAvailable = int32(monCount - 1)
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}
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if monCount <= 2 {
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logger.Error("managePodBudgets is set, but mon-count <= 2. Not creating a disruptionbudget for Mons")
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return nil
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}
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namespace := cephCluster.ObjectMeta.Namespace
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pdbRequest := types.NamespacedName{Name: pdbName, Namespace: namespace}
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pdb := &policyv1beta1.PodDisruptionBudget{
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ObjectMeta: metav1.ObjectMeta{
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Name: pdbName,
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Namespace: namespace,
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},
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Spec: policyv1beta1.PodDisruptionBudgetSpec{
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Selector: &metav1.LabelSelector{
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MatchLabels: map[string]string{k8sutil.AppAttr: mon.AppName},
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},
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MinAvailable: &intstr.IntOrString{IntVal: minAvailable},
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},
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}
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err := r.reconcileStaticPDB(pdbRequest, pdb)
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if err != nil {
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return fmt.Errorf("could not reconcile mon pdb: %+v", err)
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}
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return nil
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}
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