2aa18cafc6
With CoreDNS now supporting etcdv3 as the DNS backend, we can update our federation target to etcdv3. Users will now be able to use etcdv3 server as the federation backbone. Minio will update bucket data to etcdv3 and CoreDNS can pick that data up and serve it as bucket style DNS path.
114 lines
3.3 KiB
Go
114 lines
3.3 KiB
Go
// Copyright 2016 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 clientv3
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import (
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"context"
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pb "github.com/coreos/etcd/etcdserver/etcdserverpb"
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"github.com/coreos/etcd/pkg/types"
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"google.golang.org/grpc"
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)
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type (
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Member pb.Member
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MemberListResponse pb.MemberListResponse
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MemberAddResponse pb.MemberAddResponse
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MemberRemoveResponse pb.MemberRemoveResponse
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MemberUpdateResponse pb.MemberUpdateResponse
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)
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type Cluster interface {
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// MemberList lists the current cluster membership.
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MemberList(ctx context.Context) (*MemberListResponse, error)
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// MemberAdd adds a new member into the cluster.
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MemberAdd(ctx context.Context, peerAddrs []string) (*MemberAddResponse, error)
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// MemberRemove removes an existing member from the cluster.
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MemberRemove(ctx context.Context, id uint64) (*MemberRemoveResponse, error)
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// MemberUpdate updates the peer addresses of the member.
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MemberUpdate(ctx context.Context, id uint64, peerAddrs []string) (*MemberUpdateResponse, error)
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}
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type cluster struct {
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remote pb.ClusterClient
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callOpts []grpc.CallOption
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}
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func NewCluster(c *Client) Cluster {
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api := &cluster{remote: RetryClusterClient(c)}
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if c != nil {
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api.callOpts = c.callOpts
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}
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return api
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}
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func NewClusterFromClusterClient(remote pb.ClusterClient, c *Client) Cluster {
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api := &cluster{remote: remote}
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if c != nil {
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api.callOpts = c.callOpts
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}
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return api
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}
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func (c *cluster) MemberAdd(ctx context.Context, peerAddrs []string) (*MemberAddResponse, error) {
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// fail-fast before panic in rafthttp
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if _, err := types.NewURLs(peerAddrs); err != nil {
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return nil, err
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}
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r := &pb.MemberAddRequest{PeerURLs: peerAddrs}
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resp, err := c.remote.MemberAdd(ctx, r, c.callOpts...)
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if err != nil {
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return nil, toErr(ctx, err)
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}
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return (*MemberAddResponse)(resp), nil
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}
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func (c *cluster) MemberRemove(ctx context.Context, id uint64) (*MemberRemoveResponse, error) {
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r := &pb.MemberRemoveRequest{ID: id}
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resp, err := c.remote.MemberRemove(ctx, r, c.callOpts...)
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if err != nil {
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return nil, toErr(ctx, err)
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}
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return (*MemberRemoveResponse)(resp), nil
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}
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func (c *cluster) MemberUpdate(ctx context.Context, id uint64, peerAddrs []string) (*MemberUpdateResponse, error) {
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// fail-fast before panic in rafthttp
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if _, err := types.NewURLs(peerAddrs); err != nil {
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return nil, err
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}
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// it is safe to retry on update.
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r := &pb.MemberUpdateRequest{ID: id, PeerURLs: peerAddrs}
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resp, err := c.remote.MemberUpdate(ctx, r, c.callOpts...)
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if err == nil {
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return (*MemberUpdateResponse)(resp), nil
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}
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return nil, toErr(ctx, err)
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}
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func (c *cluster) MemberList(ctx context.Context) (*MemberListResponse, error) {
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// it is safe to retry on list.
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resp, err := c.remote.MemberList(ctx, &pb.MemberListRequest{}, c.callOpts...)
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if err == nil {
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return (*MemberListResponse)(resp), nil
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}
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return nil, toErr(ctx, err)
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}
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