mirror of
https://github.com/etcd-io/etcd.git
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98 lines
2.4 KiB
Go
98 lines
2.4 KiB
Go
// Copyright 2015 The etcd Authors
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package api
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import (
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"sync"
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"github.com/coreos/etcd/version"
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"go.uber.org/zap"
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"github.com/coreos/go-semver/semver"
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"github.com/coreos/pkg/capnslog"
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)
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type Capability string
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const (
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AuthCapability Capability = "auth"
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V3rpcCapability Capability = "v3rpc"
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)
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var (
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plog = capnslog.NewPackageLogger("github.com/coreos/etcd", "etcdserver/api")
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// capabilityMaps is a static map of version to capability map.
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capabilityMaps = map[string]map[Capability]bool{
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"3.0.0": {AuthCapability: true, V3rpcCapability: true},
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"3.1.0": {AuthCapability: true, V3rpcCapability: true},
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"3.2.0": {AuthCapability: true, V3rpcCapability: true},
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"3.3.0": {AuthCapability: true, V3rpcCapability: true},
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}
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enableMapMu sync.RWMutex
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// enabledMap points to a map in capabilityMaps
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enabledMap map[Capability]bool
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curVersion *semver.Version
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)
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func init() {
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enabledMap = map[Capability]bool{
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AuthCapability: true,
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V3rpcCapability: true,
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}
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}
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// UpdateCapability updates the enabledMap when the cluster version increases.
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func UpdateCapability(lg *zap.Logger, v *semver.Version) {
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if v == nil {
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// if recovered but version was never set by cluster
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return
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}
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enableMapMu.Lock()
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if curVersion != nil && !curVersion.LessThan(*v) {
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enableMapMu.Unlock()
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return
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}
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curVersion = v
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enabledMap = capabilityMaps[curVersion.String()]
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enableMapMu.Unlock()
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if lg != nil {
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lg.Info(
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"enabled capabilities for version",
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zap.String("cluster-version", version.Cluster(v.String())),
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)
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} else {
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plog.Infof("enabled capabilities for version %s", version.Cluster(v.String()))
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}
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}
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func IsCapabilityEnabled(c Capability) bool {
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enableMapMu.RLock()
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defer enableMapMu.RUnlock()
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if enabledMap == nil {
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return false
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}
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return enabledMap[c]
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}
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func EnableCapability(c Capability) {
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enableMapMu.Lock()
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defer enableMapMu.Unlock()
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enabledMap[c] = true
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}
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