2022-03-01 快速搭建raft集群
2024-04-25 03:31:49
目录
摘要:
raft测试代码:
raft-grpc-example:
编译:
raftadmin:
编译:
快速组建raft集群:
一. 生成需要的文件目录
二. 分别启动一个bootstrap节点和两个常规节点
三. 给bootstrap节点增加follow节点
查看结果:
raftadmin可用命令
查看leader:
查看stats
重选主
nodeB日志:
nodeC日志:
重启nodeA, 查看nodeA加入集群的日志:
查看当前leader:
摘要:
快速搭建raft三节点集群
raft测试代码:
raft-grpc-example:
https://github.com/Jille/raft-grpc-example
编译:
进入根目录
go mod vendorgo build -o raft-grpc-example .raftadmin:
GitHub - Jille/raftadmin: gRPC wrapper for Hashicorp's raft.Raft object
编译:
进入根目录
go mod vendorgo build -o raftadmin cmd/raftadmin/raftadmin.go快速组建raft集群:
一. 生成需要的文件目录
rm /tmp/my-raft-cluster -rf
mkdir /tmp/my-raft-cluster
mkdir /tmp/my-raft-cluster/nodeA
mkdir /tmp/my-raft-cluster/nodeB
mkdir /tmp/my-raft-cluster/nodeC二. 分别启动一个bootstrap节点和两个常规节点
./raft-grpc-example --raft_bootstrap --raft_id=nodeA --address=localhost:50051 --raft_data_dir /tmp/my-raft-cluster./raft-grpc-example --raft_id=nodeB --address=localhost:50052 --raft_data_dir /tmp/my-raft-cluster./raft-grpc-example --raft_id=nodeC --address=localhost:50053 --raft_data_dir /tmp/my-raft-cluster三. 给bootstrap节点增加follow节点
# 向nodeA 增加 nodeB./raftadmin localhost:50051 add_voter nodeB localhost:50052 0# 增加nodeC./raftadmin --leader multi:///localhost:50051,localhost:50052 add_voter nodeC localhost:50053 0查看结果:
raftadmin可用命令
root@localhost:~/work/github/raftadmin# ./admin --leader
2022/03/01 14:09:03 Usage: raftadmin <host:port> <command> <args...>
Commands: add_nonvoter, add_voter, applied_index, apply_log, await, barrier, demote_voter, forget, get_configuration, last_contact, last_index, leader, leadership_transfer, leadership_transfer_to_server, remove_server, shutdown, snapshot, state, stats, verify_leader
查看leader:
root@localhost:~/work/github/raftadmin# ./admin --leader multi:///localhost:50051,localhost:50052 leader2022/03/01 13:56:01 Invoking Leader()
2022/03/01 13:56:01 Response: address: "localhost:50051"
查看stats
root@localhost:~/work/github/raftadmin# ./admin --leader multi:///localhost:50051,localhost:50052 stats
2022/03/01 14:10:16 Invoking Stats()
2022/03/01 14:10:16 Response: stats: {key: "applied_index"value: "4"
}
stats: {key: "commit_index"value: "4"
}
stats: {key: "fsm_pending"value: "0"
}
stats: {key: "last_contact"value: "0"
}
stats: {key: "last_log_index"value: "4"
}
stats: {key: "last_log_term"value: "2"
}
stats: {key: "last_snapshot_index"value: "0"
}
stats: {key: "last_snapshot_term"value: "0"
}
stats: {key: "latest_configuration"value: "[{Suffrage:Voter ID:nodeA Address:localhost:50051} {Suffrage:Voter ID:nodeB Address:localhost:50052} {Suffrage:Voter ID:nodeC Address:localhost:50053}]"
}
stats: {key: "latest_configuration_index"value: "0"
}
stats: {key: "num_peers"value: "2"
}
stats: {key: "protocol_version"value: "3"
}
stats: {key: "protocol_version_max"value: "3"
}
stats: {key: "protocol_version_min"value: "0"
}
stats: {key: "snapshot_version_max"value: "1"
}
stats: {key: "snapshot_version_min"value: "0"
}
stats: {key: "state"value: "Leader"
}
stats: {key: "term"value: "2"
}
roo重选主
把当前leader nodeA停掉, 重新选主
杀掉nodeA
nodeB日志:
2022-03-01T13:55:15.684+0800 [INFO] raft: initial configuration: index=0 servers=[]
2022-03-01T13:55:15.684+0800 [INFO] raft: entering follower state: follower="Node at localhost:50052 [Follower]" leader=
2022-03-01T13:55:16.944+0800 [WARN] raft: no known peers, aborting election
2022-03-01T13:55:34.787+0800 [WARN] raft: failed to get previous log: previous-index=3 last-index=0 error="log not found"
2022-03-01T14:11:28.805+0800 [WARN] raft: heartbeat timeout reached, starting election: last-leader=localhost:50051
2022-03-01T14:11:28.805+0800 [INFO] raft: entering candidate state: node="Node at localhost:50052 [Candidate]" term=3
2022-03-01T14:11:28.808+0800 [ERROR] raft: failed to make requestVote RPC: target="{Voter nodeA localhost:50051}" error="rpc error: code = Unavailable desc = connection error: desc = "transport: Error while dialing dial tcp [::1]:50051: connect: connection refused""
2022-03-01T14:11:28.809+0800 [DEBUG] raft: votes: needed=2
2022-03-01T14:11:28.809+0800 [DEBUG] raft: vote granted: from=nodeB term=3 tally=1
2022-03-01T14:11:29.298+0800 [INFO] raft: duplicate requestVote for same term: term=3
2022-03-01T14:11:30.024+0800 [WARN] raft: Election timeout reached, restarting election
2022-03-01T14:11:30.024+0800 [INFO] raft: entering candidate state: node="Node at localhost:50052 [Candidate]" term=4
2022-03-01T14:11:30.027+0800 [ERROR] raft: failed to make requestVote RPC: target="{Voter nodeA localhost:50051}" error="rpc error: code = Unavailable desc = connection error: desc = "transport: Error while dialing dial tcp [::1]:50051: connect: connection refused""
2022-03-01T14:11:30.028+0800 [DEBUG] raft: votes: needed=2
2022-03-01T14:11:30.028+0800 [DEBUG] raft: vote granted: from=nodeB term=4 tally=1
2022-03-01T14:11:30.031+0800 [DEBUG] raft: vote granted: from=nodeC term=4 tally=2
2022-03-01T14:11:30.031+0800 [INFO] raft: election won: tally=2
2022-03-01T14:11:30.031+0800 [INFO] raft: entering leader state: leader="Node at localhost:50052 [Leader]"
2022-03-01T14:11:30.031+0800 [INFO] raft: added peer, starting replication: peer=nodeA
2022-03-01T14:11:30.031+0800 [INFO] raft: added peer, starting replication: peer=nodeC
nodeC日志:
2022-03-01T13:55:21.716+0800 [INFO] raft: initial configuration: index=0 servers=[]
2022-03-01T13:55:21.716+0800 [INFO] raft: entering follower state: follower="Node at localhost:50053 [Follower]" leader=
2022-03-01T13:55:22.892+0800 [WARN] raft: no known peers, aborting election
2022-03-01T13:55:38.762+0800 [WARN] raft: failed to get previous log: previous-index=4 last-index=0 error="log not found"
2022-03-01T14:11:28.810+0800 [WARN] raft: rejecting vote request since we have a leader: from=localhost:50052 leader=localhost:50051
2022-03-01T14:11:29.293+0800 [WARN] raft: heartbeat timeout reached, starting election: last-leader=localhost:50051
2022-03-01T14:11:29.293+0800 [INFO] raft: entering candidate state: node="Node at localhost:50053 [Candidate]" term=3
2022-03-01T14:11:29.297+0800 [DEBUG] raft: votes: needed=2
2022-03-01T14:11:29.298+0800 [DEBUG] raft: vote granted: from=nodeC term=3 tally=1
2022-03-01T14:11:29.298+0800 [ERROR] raft: failed to make requestVote RPC: target="{Voter nodeA localhost:50051}" error="rpc error: code = Unavailable desc = connection error: desc = "transport: Error while dialing dial tcp [::1]:50051: connect: connection refused""
2022-03-01T14:11:30.029+0800 [DEBUG] raft: lost leadership because received a requestVote with a newer term
2022-03-01T14:11:30.031+0800 [INFO] raft: entering follower state: follower="Node at localhost:50053 [Follower]" leader=
2022-03-01T14:12:24.610+0800 [WARN] raft: rejecting vote request since we have a leader: from=localhost:50051 leader=localhost:50052
2022-03-01T14:12:25.999+0800 [WARN] raft: rejecting vote request since we have a leader: from=localhost:50051 leader=localhost:50052
2022-03-01T14:12:27.880+0800 [WARN] raft: rejecting vote request since we have a leader: from=localhost:50051 leader=localhost:50052
2022-03-01T14:12:29.461+0800 [WARN] raft: rejecting vote request since we have a leader: from=localhost:50051 leader=localhost:50052
2022-03-01T14:12:30.885+0800 [WARN] raft: rejecting vote request since we have a leader: from=localhost:50051 leader=localhost:50052
2022-03-01T14:12:32.181+0800 [WARN] raft: rejecting vote request since we have a leader: from=localhost:50051 leader=localhost:50052
2022-03-01T14:12:33.812+0800 [WARN] raft: rejecting vote request since we have a leader: from=localhost:50051 leader=localhost:50052
2022-03-01T14:12:35.449+0800 [WARN] raft: rejecting vote request since we have a leader: from=localhost:50051 leader=localhost:50052
2022-03-01T14:12:37.181+0800 [WARN] raft: rejecting vote request since we have a leader: from=localhost:50051 leader=localhost:50052
2022-03-01T14:12:38.305+0800 [WARN] raft: rejecting vote request since we have a leader: from=localhost:50051 leader=localhost:50052
2022-03-01T14:12:40.042+0800 [WARN] raft: rejecting vote request since we have a leader: from=localhost:50051 leader=localhost:50052
2022-03-01T14:12:41.257+0800 [WARN] raft: rejecting vote request since we have a leader: from=localhost:50051 leader=localhost:50052
2022-03-01T14:12:43.056+0800 [WARN] raft: rejecting vote request since we have a leader: from=localhost:50051 leader=localhost:50052
2022-03-01T14:12:44.575+0800 [WARN] raft: rejecting vote request since we have a leader: from=localhost:50051 leader=localhost:50052
2022-03-01T14:12:45.969+0800 [WARN] raft: rejecting vote request since we have a leader: from=localhost:50051 leader=localhost:50052
2022-03-01T14:12:47.490+0800 [WARN] raft: rejecting vote request since we have a leader: from=localhost:50051 leader=localhost:50052
2022-03-01T14:12:48.518+0800 [WARN] raft: rejecting vote request since we have a leader: from=localhost:50051 leader=localhost:50052
2022-03-01T14:12:50.320+0800 [WARN] raft: rejecting vote request since we have a leader: from=localhost:50051 leader=localhost:50052
2022-03-01T14:12:52.189+0800 [WARN] raft: rejecting vote request since we have a leader: from=localhost:50051 leader=localhost:50052
2022-03-01T14:12:53.934+0800 [WARN] raft: rejecting vote request since we have a leader: from=localhost:50051 leader=localhost:50052
2022-03-01T14:12:54.693+0800 [DEBUG] raft: lost leadership because received a requestVote with a newer term
重启nodeA, 查看nodeA加入集群的日志:
root@localhost:~/work/github/raft-grpc-example# ./m --raft_id=nodeA --address=localhost:50051 --raft_data_dir /tmp/my-raft-cluster
2022-03-01T14:12:23.383+0800 [INFO] raft: initial configuration: index=4 servers="[{Suffrage:Voter ID:nodeA Address:localhost:50051} {Suffrage:Voter ID:nodeB Address:localhost:50052} {Suffrage:Voter ID:nodeC Address:localhost:50053}]"
2022-03-01T14:12:23.384+0800 [INFO] raft: entering follower state: follower="Node at localhost:50051 [Follower]" leader=
2022-03-01T14:12:24.604+0800 [WARN] raft: heartbeat timeout reached, starting election: last-leader=
2022-03-01T14:12:24.604+0800 [INFO] raft: entering candidate state: node="Node at localhost:50051 [Candidate]" term=3
2022-03-01T14:12:24.608+0800 [DEBUG] raft: votes: needed=2
2022-03-01T14:12:24.608+0800 [DEBUG] raft: vote granted: from=nodeA term=3 tally=1
2022-03-01T14:12:24.610+0800 [DEBUG] raft: newer term discovered, fallback to follower
2022-03-01T14:12:24.611+0800 [INFO] raft: entering follower state: follower="Node at localhost:50051 [Follower]" leader=
2022-03-01T14:12:25.995+0800 [WARN] raft: heartbeat timeout reached, starting election: last-leader=
2022-03-01T14:12:25.995+0800 [INFO] raft: entering candidate state: node="Node at localhost:50051 [Candidate]" term=5
2022-03-01T14:12:25.999+0800 [DEBUG] raft: votes: needed=2
2022-03-01T14:12:25.999+0800 [DEBUG] raft: vote granted: from=nodeA term=5 tally=1
2022-03-01T14:12:27.876+0800 [WARN] raft: Election timeout reached, restarting election
2022-03-01T14:12:27.876+0800 [INFO] raft: entering candidate state: node="Node at localhost:50051 [Candidate]" term=6
2022-03-01T14:12:27.879+0800 [DEBUG] raft: votes: needed=2
2022-03-01T14:12:27.880+0800 [DEBUG] raft: vote granted: from=nodeA term=6 tally=1
2022-03-01T14:12:29.457+0800 [WARN] raft: Election timeout reached, restarting election
2022-03-01T14:12:29.457+0800 [INFO] raft: entering candidate state: node="Node at localhost:50051 [Candidate]" term=7
2022-03-01T14:12:29.461+0800 [DEBUG] raft: votes: needed=2
2022-03-01T14:12:29.461+0800 [DEBUG] raft: vote granted: from=nodeA term=7 tally=1
2022-03-01T14:12:30.880+0800 [WARN] raft: Election timeout reached, restarting election
2022-03-01T14:12:30.880+0800 [INFO] raft: entering candidate state: node="Node at localhost:50051 [Candidate]" term=8
2022-03-01T14:12:30.884+0800 [DEBUG] raft: votes: needed=2
2022-03-01T14:12:30.884+0800 [DEBUG] raft: vote granted: from=nodeA term=8 tally=1
2022-03-01T14:12:32.176+0800 [WARN] raft: Election timeout reached, restarting election
2022-03-01T14:12:32.176+0800 [INFO] raft: entering candidate state: node="Node at localhost:50051 [Candidate]" term=9
2022-03-01T14:12:32.181+0800 [DEBUG] raft: votes: needed=2
2022-03-01T14:12:32.181+0800 [DEBUG] raft: vote granted: from=nodeA term=9 tally=1
2022-03-01T14:12:33.805+0800 [WARN] raft: Election timeout reached, restarting election
2022-03-01T14:12:33.805+0800 [INFO] raft: entering candidate state: node="Node at localhost:50051 [Candidate]" term=10
2022-03-01T14:12:33.811+0800 [DEBUG] raft: votes: needed=2
2022-03-01T14:12:33.811+0800 [DEBUG] raft: vote granted: from=nodeA term=10 tally=1
2022-03-01T14:12:35.446+0800 [WARN] raft: Election timeout reached, restarting election
2022-03-01T14:12:35.446+0800 [INFO] raft: entering candidate state: node="Node at localhost:50051 [Candidate]" term=11
2022-03-01T14:12:35.448+0800 [DEBUG] raft: votes: needed=2
2022-03-01T14:12:35.448+0800 [DEBUG] raft: vote granted: from=nodeA term=11 tally=1
2022-03-01T14:12:37.177+0800 [WARN] raft: Election timeout reached, restarting election
2022-03-01T14:12:37.177+0800 [INFO] raft: entering candidate state: node="Node at localhost:50051 [Candidate]" term=12
2022-03-01T14:12:37.181+0800 [DEBUG] raft: votes: needed=2
2022-03-01T14:12:37.181+0800 [DEBUG] raft: vote granted: from=nodeA term=12 tally=1
2022-03-01T14:12:38.299+0800 [WARN] raft: Election timeout reached, restarting election
2022-03-01T14:12:38.299+0800 [INFO] raft: entering candidate state: node="Node at localhost:50051 [Candidate]" term=13
2022-03-01T14:12:38.304+0800 [DEBUG] raft: votes: needed=2
2022-03-01T14:12:38.304+0800 [DEBUG] raft: vote granted: from=nodeA term=13 tally=1
2022-03-01T14:12:40.038+0800 [WARN] raft: Election timeout reached, restarting election
2022-03-01T14:12:40.038+0800 [INFO] raft: entering candidate state: node="Node at localhost:50051 [Candidate]" term=14
2022-03-01T14:12:40.042+0800 [DEBUG] raft: votes: needed=2
2022-03-01T14:12:40.042+0800 [DEBUG] raft: vote granted: from=nodeA term=14 tally=1
2022-03-01T14:12:41.253+0800 [WARN] raft: Election timeout reached, restarting election
2022-03-01T14:12:41.254+0800 [INFO] raft: entering candidate state: node="Node at localhost:50051 [Candidate]" term=15
2022-03-01T14:12:41.256+0800 [DEBUG] raft: votes: needed=2
2022-03-01T14:12:41.256+0800 [DEBUG] raft: vote granted: from=nodeA term=15 tally=1
2022-03-01T14:12:43.050+0800 [WARN] raft: Election timeout reached, restarting election
2022-03-01T14:12:43.050+0800 [INFO] raft: entering candidate state: node="Node at localhost:50051 [Candidate]" term=16
2022-03-01T14:12:43.056+0800 [DEBUG] raft: votes: needed=2
2022-03-01T14:12:43.056+0800 [DEBUG] raft: vote granted: from=nodeA term=16 tally=1
2022-03-01T14:12:44.571+0800 [WARN] raft: Election timeout reached, restarting election
2022-03-01T14:12:44.571+0800 [INFO] raft: entering candidate state: node="Node at localhost:50051 [Candidate]" term=17
2022-03-01T14:12:44.575+0800 [DEBUG] raft: votes: needed=2
2022-03-01T14:12:44.575+0800 [DEBUG] raft: vote granted: from=nodeA term=17 tally=1
2022-03-01T14:12:45.958+0800 [WARN] raft: Election timeout reached, restarting election
2022-03-01T14:12:45.959+0800 [INFO] raft: entering candidate state: node="Node at localhost:50051 [Candidate]" term=18
2022-03-01T14:12:45.968+0800 [DEBUG] raft: votes: needed=2
2022-03-01T14:12:45.968+0800 [DEBUG] raft: vote granted: from=nodeA term=18 tally=1
2022-03-01T14:12:47.484+0800 [WARN] raft: Election timeout reached, restarting election
2022-03-01T14:12:47.484+0800 [INFO] raft: entering candidate state: node="Node at localhost:50051 [Candidate]" term=19
2022-03-01T14:12:47.489+0800 [DEBUG] raft: votes: needed=2
2022-03-01T14:12:47.489+0800 [DEBUG] raft: vote granted: from=nodeA term=19 tally=1
2022-03-01T14:12:48.514+0800 [WARN] raft: Election timeout reached, restarting election
2022-03-01T14:12:48.514+0800 [INFO] raft: entering candidate state: node="Node at localhost:50051 [Candidate]" term=20
2022-03-01T14:12:48.517+0800 [DEBUG] raft: votes: needed=2
2022-03-01T14:12:48.517+0800 [DEBUG] raft: vote granted: from=nodeA term=20 tally=1
2022-03-01T14:12:50.317+0800 [WARN] raft: Election timeout reached, restarting election
2022-03-01T14:12:50.317+0800 [INFO] raft: entering candidate state: node="Node at localhost:50051 [Candidate]" term=21
2022-03-01T14:12:50.320+0800 [DEBUG] raft: votes: needed=2
2022-03-01T14:12:50.320+0800 [DEBUG] raft: vote granted: from=nodeA term=21 tally=1
2022-03-01T14:12:52.179+0800 [WARN] raft: Election timeout reached, restarting election
2022-03-01T14:12:52.179+0800 [INFO] raft: entering candidate state: node="Node at localhost:50051 [Candidate]" term=22
2022-03-01T14:12:52.188+0800 [DEBUG] raft: votes: needed=2
2022-03-01T14:12:52.188+0800 [DEBUG] raft: vote granted: from=nodeA term=22 tally=1
2022-03-01T14:12:53.929+0800 [WARN] raft: Election timeout reached, restarting election
2022-03-01T14:12:53.929+0800 [INFO] raft: entering candidate state: node="Node at localhost:50051 [Candidate]" term=23
2022-03-01T14:12:53.933+0800 [DEBUG] raft: votes: needed=2
2022-03-01T14:12:53.933+0800 [DEBUG] raft: vote granted: from=nodeA term=23 tally=1
2022-03-01T14:12:54.690+0800 [DEBUG] raft: lost leadership because received a requestVote with a newer term
2022-03-01T14:12:54.694+0800 [INFO] raft: entering follower state: follower="Node at localhost:50051 [Follower]" leader=
2022-03-01T14:12:54.695+0800 [WARN] raft: failed to get previous log: previous-index=5 last-index=4 error="log not found"
查看当前leader:
root@localhost:~/work/github/raftadmin# ./admin --leader multi:///localhost:50051,localhost:50052 leader2022/03/01 14:13:07 Invoking Leader()
2022/03/01 14:13:07 Response: address: "localhost:50052"
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