/
selectors.go
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/
selectors.go
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// Copyright 2018 Oracle and/or its affiliates. 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 labeler
import (
labels "k8s.io/apimachinery/pkg/labels"
selection "k8s.io/apimachinery/pkg/selection"
constants "github.com/oracle/mysql-operator/pkg/constants"
)
// PrimarySelector returns a label selector that selects only primaries of a
// Cluster's Pods.
func PrimarySelector(name string) labels.Selector {
return labels.SelectorFromSet(labels.Set{
constants.ClusterLabel: name,
constants.LabelClusterRole: constants.ClusterRolePrimary,
})
}
// SecondarySelector returns a label selector that selects only secondaries of a
// Cluster's Pods.
func SecondarySelector(name string) labels.Selector {
return labels.SelectorFromSet(labels.Set{
constants.ClusterLabel: name,
constants.LabelClusterRole: constants.ClusterRoleSecondary,
})
}
// NonPrimarySelector returns a label selector that selects all Pods excluding
// primaries of a Cluster.
func NonPrimarySelector(name string) labels.Selector {
s := labels.SelectorFromSet(labels.Set{constants.ClusterLabel: name})
requirement, _ := labels.NewRequirement(constants.LabelClusterRole, selection.NotIn, []string{constants.ClusterRolePrimary})
return s.Add(*requirement)
}
// HasRoleSelector returns a label selector that selects all Pods for a
// Cluster that have been labeled as having a role.
func HasRoleSelector(name string) labels.Selector {
s := labels.SelectorFromSet(labels.Set{constants.ClusterLabel: name})
requirement, _ := labels.NewRequirement(constants.LabelClusterRole, selection.Exists, []string{})
return s.Add(*requirement)
}