/
names.go
50 lines (44 loc) · 1.82 KB
/
names.go
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// Copyright 2017 Google LLC
//
// 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 controller
import (
"crypto/sha1"
"encoding/hex"
"fmt"
"strings"
"github.com/ianlewis/memcached-operator/pkg/apis/ianlewis.org/v1alpha1"
)
// MakeName creates an object name (usually Pod) by appending the given prefix to a hash of the given values (such as another object's UID).
func MakeName(prefix string, hashValues []string) string {
hasher := sha1.New()
for _, val := range hashValues {
fmt.Fprintf(hasher, "%s", val)
}
// Hashes are shortened to 5 characters to keep them reasonably manageable to
// work with. Names of objects in Kubernetes must be lowercase alphanumeric so
// the hash value is encoded to hex and changed to lowercase.
hash := hex.EncodeToString(hasher.Sum(nil))
return prefix + strings.ToLower(hash[2:7])
}
// GetProxyServiceName returns the name of the proxy service for the given proxy
func GetProxyServiceName(p *v1alpha1.MemcachedProxy) string {
return MakeName(fmt.Sprintf("%s-memcached-", p.Name), []string{p.Name})
}
// GetProxyServiceSelector returns labels used by the proxy service's selector
func GetProxyServiceSelector(p *v1alpha1.MemcachedProxy) map[string]string {
return map[string]string{
"memcached-operator": "true",
"mcrouter": MakeName(p.Name+"-", []string{p.Namespace, p.Name}),
}
}