forked from rook/rook
112 lines
2.9 KiB
Go
112 lines
2.9 KiB
Go
/*
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Copyright 2016 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 bootstrap
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import (
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"github.com/coreos/etcd/client"
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"github.com/coreos/etcd/pkg/types"
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ctx "golang.org/x/net/context"
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)
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type EtcdMgrContext interface {
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Client(initialNodes []string) (client.Client, error)
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MembersAPI() (client.MembersAPI, error)
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KeysAPI() (client.KeysAPI, error)
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Members() ([]string, types.URLsMap, error)
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}
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type Context struct {
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ClusterToken string
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}
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func (e *Context) Client(initialNodes []string) (client.Client, error) {
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c, err := client.New(client.Config{
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Endpoints: initialNodes,
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Transport: client.DefaultTransport,
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HeaderTimeoutPerRequest: DefaultClientTimeout,
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})
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if err != nil {
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return nil, err
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}
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return c, nil
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}
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// MembersAPI returns an instance of MembersAPI for the current etcd cluster
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func (e *Context) MembersAPI() (client.MembersAPI, error) {
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members, _, err := e.Members()
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if err != nil {
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return nil, err
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}
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c, err := e.Client(members)
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if err != nil {
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return nil, err
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}
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mAPI := client.NewMembersAPI(c)
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return mAPI, nil
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}
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func (e *Context) KeysAPI() (client.KeysAPI, error) {
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members, _, err := e.Members()
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if err != nil {
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return nil, err
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}
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c, err := e.Client(members)
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if err != nil {
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return nil, err
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}
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kAPI := client.NewKeysAPI(c)
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return kAPI, nil
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}
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func (e *Context) Members() ([]string, types.URLsMap, error) {
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urlsMap := types.URLsMap{}
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var nodes []string
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size, err := getClusterSize(e.ClusterToken)
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if err != nil {
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return nodes, urlsMap, err
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}
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initialNodes, err := GetCurrentNodesFromDiscovery(e.ClusterToken, size)
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if err != nil {
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logger.Errorf("error in GetCurrentNodesFromDiscovery: %+v", err)
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return nodes, urlsMap, err
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}
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c, err := e.Client(initialNodes)
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if err != nil {
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return nodes, urlsMap, err
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}
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mAPI := client.NewMembersAPI(c)
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members, err := mAPI.List(ctx.Background())
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if err != nil {
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return nodes, urlsMap, err
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}
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for _, member := range members {
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urls, err := types.NewURLs(member.PeerURLs)
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if err != nil {
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return nodes, urlsMap, err
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}
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urlsMap[member.ID] = urls
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// ClientURLs of a member is a url which is used by this member to listen to the clients' requests. This url could be used
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// to create etcd client objects. In some use cases, multiple urls might be used, but we don't use that pattern.
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nodes = append(nodes, member.ClientURLs...)
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}
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return nodes, urlsMap, nil
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}
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