docker容器的双向UDP端口

我有一个领事在docker容器中运行。
当我启动另一个领事代理（不在docker上）时，它会说：

[WARN] memberlist: Was able to reach container_name via TCP but not UDP, network may be misconfigured and not allowing bidirectional UDP

我试图在这里形成一个集群，但领导人选举一直失败。
我怎样才能解决这个问题

我在docker compose.yml中的端口规范（docker compose版本：1）

Docker容器中运行的Consult1日志：

         Node name: '<host>'
        Datacenter: 'dc1'
            Server: true (bootstrap: true)
       Client Addr: 0.0.0.0 (HTTP: 8500, HTTPS: -1, DNS: 8600, RPC: 8400)
      Cluster Addr: <host_ip> (LAN: 8301, WAN: 8302)
    Gossip encrypt: false, RPC-TLS: false, TLS-Incoming: false
             Atlas: <disabled>

==> Log data will now stream in as it occurs:

    2017/06/08 03:39:44 [INFO] raft: Restored from snapshot 13-35418-1496826625488
    2017/06/08 03:39:44 [INFO] serf: EventMemberJoin: <host> <host_ip>
    2017/06/08 03:39:44 [INFO] raft: Node at <host_ip>:8300 [Follower] entering Follower state
    2017/06/08 03:39:44 [INFO] consul: adding LAN server <host> (Addr: <host_ip>:8300) (DC: dc1)
    2017/06/08 03:39:44 [INFO] serf: EventMemberJoin: <host>.dc1 <host_ip>
    2017/06/08 03:39:44 [INFO] consul: adding WAN server <host>.dc1 (Addr: <host_ip>:8300) (DC: dc1)
    2017/06/08 03:39:44 [ERR] agent: failed to sync remote state: No cluster leader
    2017/06/08 03:39:45 [WARN] raft: Heartbeat timeout reached, starting election
    2017/06/08 03:39:45 [INFO] raft: Node at <host_ip>:8300 [Candidate] entering Candidate state
    2017/06/08 03:39:45 [INFO] raft: Election won. Tally: 1
    2017/06/08 03:39:45 [INFO] raft: Node at <host_ip>:8300 [Leader] entering Leader state
    2017/06/08 03:39:45 [INFO] consul: cluster leadership acquired
    2017/06/08 03:39:45 [INFO] consul: New leader elected: <host>
    2017/06/08 03:39:45 [INFO] raft: Disabling EnableSingleNode (bootstrap)
    2017/06/08 03:39:45 [INFO] raft: Added peer <host_ip>:9300, starting replication
    2017/06/08 03:39:45 [INFO] raft: Removed peer <host_ip>:9300, stopping replication (Index: 36201)
    2017/06/08 03:39:45 [INFO] raft: Added peer <host_ip>:9300, starting replication
    2017/06/08 03:39:45 [INFO] raft: Added peer <host_ip>:10300, starting replication
    2017/06/08 03:39:45 [INFO] raft: Removed peer <host_ip>:10300, stopping replication (Index: 36228)
    2017/06/08 03:39:45 [INFO] raft: Removed peer <host_ip>:9300, stopping replication (Index: 36230)
    2017/06/08 03:39:45 [ERR] raft: Failed to AppendEntries to <host_ip>:10300: dial tcp <host_ip>:10300: getsockopt: connection refused
    2017/06/08 03:39:45 [ERR] raft: Failed to AppendEntries to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:39:45 [ERR] raft: Failed to AppendEntries to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:39:45 [ERR] raft: Failed to AppendEntries to <host_ip>:10300: dial tcp <host_ip>:10300: getsockopt: connection refused
    2017/06/08 03:39:45 [ERR] raft: Failed to AppendEntries to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:39:49 [WARN] agent: Check 'vault::8200:vault-sealed-check' missed TTL, is now critical
    2017/06/08 03:39:50 [INFO] serf: EventMemberJoin: server2 <host_ip>
    2017/06/08 03:39:50 [INFO] consul: adding LAN server server2 (Addr: <host_ip>:9300) (DC: dc1)
    2017/06/08 03:39:50 [INFO] raft: Added peer <host_ip>:9300, starting replication
    2017/06/08 03:39:50 [WARN] raft: AppendEntries to <host_ip>:9300 rejected, sending older logs (next: 36231)
    2017/06/08 03:39:50 [INFO] raft: pipelining replication to peer <host_ip>:9300
    2017/06/08 03:39:50 [INFO] consul: member 'server2' joined, marking health alive
    2017/06/08 03:39:52 [INFO] agent: Synced service 'vault::8200'
    2017/06/08 03:39:52 [INFO] agent: Synced check 'vault::8200:vault-sealed-check'
    2017/06/08 03:40:06 [INFO] agent: Synced check 'vault::8200:vault-sealed-check'
    2017/06/08 03:40:18 [ERR] raft: Failed to heartbeat to <host_ip>:9300: EOF
    2017/06/08 03:40:18 [INFO] raft: aborting pipeline replication to peer <host_ip>:9300
    2017/06/08 03:40:19 [ERR] raft: Failed to AppendEntries to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:40:19 [ERR] raft: Failed to heartbeat to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:40:19 [ERR] raft: Failed to AppendEntries to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:40:19 [ERR] raft: Failed to heartbeat to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:40:19 [ERR] raft: Failed to AppendEntries to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:40:19 [ERR] raft: Failed to AppendEntries to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:40:19 [ERR] raft: Failed to heartbeat to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:40:19 [WARN] raft: Failed to contact <host_ip>:9300 in 501.593114ms
    2017/06/08 03:40:19 [WARN] raft: Failed to contact quorum of nodes, stepping down
    2017/06/08 03:40:19 [INFO] raft: Node at <host_ip>:8300 [Follower] entering Follower state
    2017/06/08 03:40:19 [INFO] consul: cluster leadership lost
    2017/06/08 03:40:19 [ERR] raft: Failed to AppendEntries to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:40:20 [WARN] raft: Heartbeat timeout reached, starting election
    2017/06/08 03:40:20 [INFO] raft: Node at <host_ip>:8300 [Candidate] entering Candidate state
    2017/06/08 03:40:20 [ERR] raft: Failed to make RequestVote RPC to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:40:21 [INFO] memberlist: Suspect server2 has failed, no acks received
    2017/06/08 03:40:22 [WARN] raft: Election timeout reached, restarting election
    2017/06/08 03:40:22 [INFO] raft: Node at <host_ip>:8300 [Candidate] entering Candidate state
    2017/06/08 03:40:22 [ERR] raft: Failed to make RequestVote RPC to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:40:23 [INFO] memberlist: Suspect server2 has failed, no acks received
    2017/06/08 03:40:23 [WARN] dns: Query results too stale, re-requesting
    2017/06/08 03:40:23 [ERR] dns: rpc error: No cluster leader
    2017/06/08 03:40:23 [WARN] raft: Election timeout reached, restarting election
    2017/06/08 03:40:23 [INFO] raft: Node at <host_ip>:8300 [Candidate] entering Candidate state
    2017/06/08 03:40:23 [ERR] raft: Failed to make RequestVote RPC to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:40:24 [WARN] raft: Election timeout reached, restarting election
    2017/06/08 03:40:24 [INFO] raft: Node at <host_ip>:8300 [Candidate] entering Candidate state
    2017/06/08 03:40:24 [ERR] raft: Failed to make RequestVote RPC to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:40:24 [ERR] http: Request PUT /v1/session/renew/8c4efe65-07c3-f93e-6679-f2bc95f8e92c, error: No cluster leader from=172.17.0.4:57031
    2017/06/08 03:40:25 [INFO] memberlist: Suspect server2 has failed, no acks received
    2017/06/08 03:40:25 [ERR] http: Request PUT /v1/session/renew/8c4efe65-07c3-f93e-6679-f2bc95f8e92c, error: No cluster leader from=172.17.0.4:57061
    2017/06/08 03:40:26 [INFO] memberlist: Suspect server2 has failed, no acks received
    2017/06/08 03:40:26 [INFO] memberlist: Marking server2 as failed, suspect timeout reached
    2017/06/08 03:40:26 [INFO] serf: EventMemberFailed: server2 <host_ip>
    2017/06/08 03:40:26 [INFO] consul: removing LAN server server2 (Addr: <host_ip>:9300) (DC: dc1)
    2017/06/08 03:40:26 [WARN] raft: Election timeout reached, restarting election
    2017/06/08 03:40:26 [INFO] raft: Node at <host_ip>:8300 [Candidate] entering Candidate state
    2017/06/08 03:40:26 [ERR] raft: Failed to make RequestVote RPC to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:40:26 [ERR] agent: coordinate update error: No cluster leader
    2017/06/08 03:40:26 [ERR] http: Request PUT /v1/session/renew/8c4efe65-07c3-f93e-6679-f2bc95f8e92c, error: No cluster leader from=172.17.0.4:57064
    2017/06/08 03:40:27 [WARN] dns: Query results too stale, re-requesting
    2017/06/08 03:40:27 [ERR] dns: rpc error: No cluster leader
    2017/06/08 03:40:27 [WARN] raft: Election timeout reached, restarting election

节点名称：“”
数据中心：“dc1”
服务器：true（引导：true）
客户端地址：0.0.0.0（HTTP:8500，HTTPS:-1，DNS:8600，RPC:8400）
群集地址：（LAN:8301，WAN:8302）
流言加密：false，RPC-TLS:false，TLS传入：false
地图集：
==>日志数据现在将在发生时流入：
2017/06/08 03:39:44[信息]筏：从快照13-35418-1496826625488恢复
2017/06/08 03:39:44[信息]serf:EventMemberJoin:
2017/06/08 03:39:44[信息]筏：节点位置：8300[跟随者]进入跟随者状态
2017/06/08 03:39:44[信息]领事：添加局域网服务器（地址：8300）（DC:dc1）
2017/06/08 03:39:44[信息]serf:EventMemberJoin:.dc1
2017/06/08 03:39:44[信息]领事：添加WAN服务器.dc1（地址：8300）（DC:dc1）
2017/06/08 03:39:44[错误]代理：无法同步远程状态：无群集前导
2017/06/08 03:39:45[警告]筏：已达到心跳超时，开始选举
2017/06/08 03:39:45[信息]筏：节点位置：8300[候选人]进入候选人状态
2017/06/08 03:39:45[信息]筏：选举获胜。总数：1
2017/06/08 03:39:45[信息]筏：节点位置：8300[引导者]进入引导者状态
2017/06/08 03:39:45[信息]领事：获得集群领导地位
2017/06/08 03:39:45[信息]领事：新领导人当选：
2017/06/08 03:39:45[信息]raft:禁用EnableSingleNode（引导）
2017/06/08 03:39:45[信息]raft:添加的对等方：9300，开始复制
2017/06/08 03:39:45[信息]raft:已删除对等方：9300，正在停止复制（索引：36201）
2017/06/08 03:39:45[信息]raft:添加的对等方：9300，开始复制
2017/06/08 03:39:45[信息]raft:添加的对等方：10300，开始复制
2017/06/08 03:39:45[信息]raft:已删除对等方：10300，正在停止复制（索引：36228）
2017/06/08 03:39:45[信息]raft:已删除对等方：9300，正在停止复制（索引：36230）
2017/06/08 03:39:45[错误]raft:未能将条目附加到：10300:拨号tcp:10300:getsockopt:连接被拒绝
2017/06/08 03:39:45[错误]raft:未能将条目附加到：9300:拨号tcp:9300:getsockopt:连接被拒绝
2017/06/08 03:39:45[错误]raft:未能将条目附加到：9300:拨号tcp:9300:getsockopt:连接被拒绝
2017/06/08 03:39:45[错误]raft:未能将条目附加到：10300:拨号tcp:10300:getsockopt:连接被拒绝
2017/06/08 03:39:45[错误]raft:未能将条目附加到：9300:拨号tcp:9300:getsockopt:连接被拒绝
2017/06/08 03:39:49[警告]代理：检查“保险库：：8200:保险库密封检查”遗漏TTL，现在是关键
2017/06/08 03:39:50[信息]serf:EventMemberJoin:server2
2017/06/08 03:39:50[信息]领事：添加局域网服务器服务器2（地址：9300）（DC:dc1）
2017/06/08 03:39:50[信息]raft:添加的对等方：9300，开始复制
2017/06/08 03:39:50[警告]raft:AppendEntries to:9300被拒绝，发送较旧的日志（下一个：36231）
2017/06/08 03:39:50[信息]raft:到对等机的管道复制：9300
2017/06/08 03:39:50[信息]领事：成员“server2”加入，标志着健康活力
2017/06/08 03:39:52[信息]代理：同步服务“vault:：8200”
2017/06/08 03:39:52[信息]代理：同步检查“保险库：：8200:保险库密封检查”
2017/06/08 03:40:06[信息]代理：同步检查“保险库：：8200:保险库密封检查”
2017/06/08 03:40:18[错误]筏：无法检测到：9300:EOF
2017/06/08 03:40:18[信息]raft:中止到对等方的管道复制：9300
2017/06/08 03:40:19[错误]raft:无法将条目附加到：9300:拨号tcp:9300:getsockopt:连接被拒绝
2017/06/08 03:40:19[错误]raft:无法检测到：9300:拨号tcp:9300:getsockopt:连接被拒绝
2017/06/08 03:40:19[错误]raft:无法将条目附加到：9300:拨号tcp:9300:getsockopt:连接被拒绝
2017/06/08 03:40:19[错误]raft:无法检测到：9300:拨号tcp:9300:getsockopt:连接被拒绝
2017/06/08 03:40:19[错误]raft:无法将条目附加到：9300:拨号tcp:9300:getsockopt:连接被拒绝
2017/06/08 03:40:19[错误]raft:无法将条目附加到：9300:拨号tcp:9300:getsockopt:连接被拒绝
2017/06/08 03:40:19[错误]raft:无法检测到：9300:拨号tcp:9300:getsockopt:连接被拒绝
2017/06/08 03:40:19[警告]救生筏：未能联系：501.593114毫秒内9300
2017/06/08 03:40:19[警告]raft:无法联系节点的仲裁，正在退出
2017/06/08 03:40:19[信息]筏：节点位置：8300[跟随者]进入跟随者状态
2017/06/08 03:40:19[信息]执政官：集群领导力丧失
2017/06/08 03:40:19[错误]raft:无法将条目附加到：9300:拨号tcp:9300:getsockopt:连接被拒绝
2017/06/08 03:40:20[警告]raft:已达到心跳超时，开始选举
2017/06/08 03:40:20[信息]筏：节点位置：8300[候选人]进入候选人状态
2017/06/08 03:40:20[错误]raft:无法将请求投票RPC发送到：9300:拨号tcp:9300:getsockopt:连接被拒绝
2017/06/08 03:40:21[信息]成员列表：可疑服务器2出现故障，未收到任何确认
2017/06/08 03:40:22[警告]raft:已达到选举超时，正在重新启动选举
2017/06/08 03:40:22[信息]筏：节点位置：8300[候选人]进入候选人状态
2017/06/08 03:40:22[错误]raft:无法将请求投票RPC发送到：9300:拨号tcp:9300:getsockopt:连接被拒绝
2017/06/08 03:40:23[信息]成员列表：可疑服务器2出现故障，未收到任何确认
2017/06/08 03:40:23[警告]dns:查询结果太陈旧，正在重新请求
2017/06/08 03:40:23[错误]dns:rpc e
         Node name: '<host>'
        Datacenter: 'dc1'
            Server: true (bootstrap: true)
       Client Addr: 0.0.0.0 (HTTP: 8500, HTTPS: -1, DNS: 8600, RPC: 8400)
      Cluster Addr: <host_ip> (LAN: 8301, WAN: 8302)
    Gossip encrypt: false, RPC-TLS: false, TLS-Incoming: false
             Atlas: <disabled>

==> Log data will now stream in as it occurs:

    2017/06/08 03:39:44 [INFO] raft: Restored from snapshot 13-35418-1496826625488
    2017/06/08 03:39:44 [INFO] serf: EventMemberJoin: <host> <host_ip>
    2017/06/08 03:39:44 [INFO] raft: Node at <host_ip>:8300 [Follower] entering Follower state
    2017/06/08 03:39:44 [INFO] consul: adding LAN server <host> (Addr: <host_ip>:8300) (DC: dc1)
    2017/06/08 03:39:44 [INFO] serf: EventMemberJoin: <host>.dc1 <host_ip>
    2017/06/08 03:39:44 [INFO] consul: adding WAN server <host>.dc1 (Addr: <host_ip>:8300) (DC: dc1)
    2017/06/08 03:39:44 [ERR] agent: failed to sync remote state: No cluster leader
    2017/06/08 03:39:45 [WARN] raft: Heartbeat timeout reached, starting election
    2017/06/08 03:39:45 [INFO] raft: Node at <host_ip>:8300 [Candidate] entering Candidate state
    2017/06/08 03:39:45 [INFO] raft: Election won. Tally: 1
    2017/06/08 03:39:45 [INFO] raft: Node at <host_ip>:8300 [Leader] entering Leader state
    2017/06/08 03:39:45 [INFO] consul: cluster leadership acquired
    2017/06/08 03:39:45 [INFO] consul: New leader elected: <host>
    2017/06/08 03:39:45 [INFO] raft: Disabling EnableSingleNode (bootstrap)
    2017/06/08 03:39:45 [INFO] raft: Added peer <host_ip>:9300, starting replication
    2017/06/08 03:39:45 [INFO] raft: Removed peer <host_ip>:9300, stopping replication (Index: 36201)
    2017/06/08 03:39:45 [INFO] raft: Added peer <host_ip>:9300, starting replication
    2017/06/08 03:39:45 [INFO] raft: Added peer <host_ip>:10300, starting replication
    2017/06/08 03:39:45 [INFO] raft: Removed peer <host_ip>:10300, stopping replication (Index: 36228)
    2017/06/08 03:39:45 [INFO] raft: Removed peer <host_ip>:9300, stopping replication (Index: 36230)
    2017/06/08 03:39:45 [ERR] raft: Failed to AppendEntries to <host_ip>:10300: dial tcp <host_ip>:10300: getsockopt: connection refused
    2017/06/08 03:39:45 [ERR] raft: Failed to AppendEntries to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:39:45 [ERR] raft: Failed to AppendEntries to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:39:45 [ERR] raft: Failed to AppendEntries to <host_ip>:10300: dial tcp <host_ip>:10300: getsockopt: connection refused
    2017/06/08 03:39:45 [ERR] raft: Failed to AppendEntries to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:39:49 [WARN] agent: Check 'vault::8200:vault-sealed-check' missed TTL, is now critical
    2017/06/08 03:39:50 [INFO] serf: EventMemberJoin: server2 <host_ip>
    2017/06/08 03:39:50 [INFO] consul: adding LAN server server2 (Addr: <host_ip>:9300) (DC: dc1)
    2017/06/08 03:39:50 [INFO] raft: Added peer <host_ip>:9300, starting replication
    2017/06/08 03:39:50 [WARN] raft: AppendEntries to <host_ip>:9300 rejected, sending older logs (next: 36231)
    2017/06/08 03:39:50 [INFO] raft: pipelining replication to peer <host_ip>:9300
    2017/06/08 03:39:50 [INFO] consul: member 'server2' joined, marking health alive
    2017/06/08 03:39:52 [INFO] agent: Synced service 'vault::8200'
    2017/06/08 03:39:52 [INFO] agent: Synced check 'vault::8200:vault-sealed-check'
    2017/06/08 03:40:06 [INFO] agent: Synced check 'vault::8200:vault-sealed-check'
    2017/06/08 03:40:18 [ERR] raft: Failed to heartbeat to <host_ip>:9300: EOF
    2017/06/08 03:40:18 [INFO] raft: aborting pipeline replication to peer <host_ip>:9300
    2017/06/08 03:40:19 [ERR] raft: Failed to AppendEntries to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:40:19 [ERR] raft: Failed to heartbeat to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:40:19 [ERR] raft: Failed to AppendEntries to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:40:19 [ERR] raft: Failed to heartbeat to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:40:19 [ERR] raft: Failed to AppendEntries to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:40:19 [ERR] raft: Failed to AppendEntries to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:40:19 [ERR] raft: Failed to heartbeat to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:40:19 [WARN] raft: Failed to contact <host_ip>:9300 in 501.593114ms
    2017/06/08 03:40:19 [WARN] raft: Failed to contact quorum of nodes, stepping down
    2017/06/08 03:40:19 [INFO] raft: Node at <host_ip>:8300 [Follower] entering Follower state
    2017/06/08 03:40:19 [INFO] consul: cluster leadership lost
    2017/06/08 03:40:19 [ERR] raft: Failed to AppendEntries to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:40:20 [WARN] raft: Heartbeat timeout reached, starting election
    2017/06/08 03:40:20 [INFO] raft: Node at <host_ip>:8300 [Candidate] entering Candidate state
    2017/06/08 03:40:20 [ERR] raft: Failed to make RequestVote RPC to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:40:21 [INFO] memberlist: Suspect server2 has failed, no acks received
    2017/06/08 03:40:22 [WARN] raft: Election timeout reached, restarting election
    2017/06/08 03:40:22 [INFO] raft: Node at <host_ip>:8300 [Candidate] entering Candidate state
    2017/06/08 03:40:22 [ERR] raft: Failed to make RequestVote RPC to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:40:23 [INFO] memberlist: Suspect server2 has failed, no acks received
    2017/06/08 03:40:23 [WARN] dns: Query results too stale, re-requesting
    2017/06/08 03:40:23 [ERR] dns: rpc error: No cluster leader
    2017/06/08 03:40:23 [WARN] raft: Election timeout reached, restarting election
    2017/06/08 03:40:23 [INFO] raft: Node at <host_ip>:8300 [Candidate] entering Candidate state
    2017/06/08 03:40:23 [ERR] raft: Failed to make RequestVote RPC to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:40:24 [WARN] raft: Election timeout reached, restarting election
    2017/06/08 03:40:24 [INFO] raft: Node at <host_ip>:8300 [Candidate] entering Candidate state
    2017/06/08 03:40:24 [ERR] raft: Failed to make RequestVote RPC to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:40:24 [ERR] http: Request PUT /v1/session/renew/8c4efe65-07c3-f93e-6679-f2bc95f8e92c, error: No cluster leader from=172.17.0.4:57031
    2017/06/08 03:40:25 [INFO] memberlist: Suspect server2 has failed, no acks received
    2017/06/08 03:40:25 [ERR] http: Request PUT /v1/session/renew/8c4efe65-07c3-f93e-6679-f2bc95f8e92c, error: No cluster leader from=172.17.0.4:57061
    2017/06/08 03:40:26 [INFO] memberlist: Suspect server2 has failed, no acks received
    2017/06/08 03:40:26 [INFO] memberlist: Marking server2 as failed, suspect timeout reached
    2017/06/08 03:40:26 [INFO] serf: EventMemberFailed: server2 <host_ip>
    2017/06/08 03:40:26 [INFO] consul: removing LAN server server2 (Addr: <host_ip>:9300) (DC: dc1)
    2017/06/08 03:40:26 [WARN] raft: Election timeout reached, restarting election
    2017/06/08 03:40:26 [INFO] raft: Node at <host_ip>:8300 [Candidate] entering Candidate state
    2017/06/08 03:40:26 [ERR] raft: Failed to make RequestVote RPC to <host_ip>:9300: dial tcp <host_ip>:9300: getsockopt: connection refused
    2017/06/08 03:40:26 [ERR] agent: coordinate update error: No cluster leader
    2017/06/08 03:40:26 [ERR] http: Request PUT /v1/session/renew/8c4efe65-07c3-f93e-6679-f2bc95f8e92c, error: No cluster leader from=172.17.0.4:57064
    2017/06/08 03:40:27 [WARN] dns: Query results too stale, re-requesting
    2017/06/08 03:40:27 [ERR] dns: rpc error: No cluster leader
    2017/06/08 03:40:27 [WARN] raft: Election timeout reached, restarting election

==> WARNING: Expect Mode enabled, expecting 2 servers
==> Starting Consul agent...
==> Starting Consul agent RPC...
==> Consul agent running!
         Node name: 'server2'
        Datacenter: 'dc1'
            Server: true (bootstrap: false)
       Client Addr: 0.0.0.0 (HTTP: 9500, HTTPS: -1, DNS: 9600, RPC: 9400)
      Cluster Addr: <host_ip> (LAN: 9301, WAN: 9302)
    Gossip encrypt: false, RPC-TLS: false, TLS-Incoming: false
             Atlas: <disabled>

==> Log data will now stream in as it occurs:

    2017/06/08 09:09:50 [INFO] raft: Restored from snapshot 13-35418-1496892834061
    2017/06/08 09:09:50 [INFO] serf: EventMemberJoin: server2 <host_ip>
    2017/06/08 09:09:50 [INFO] serf: EventMemberJoin: server2.dc1 <host_ip>
    2017/06/08 09:09:50 [INFO] raft: Node at <host_ip>:9300 [Follower] entering Follower state
    2017/06/08 09:09:50 [INFO] consul: adding LAN server server2 (Addr: <host_ip>:9300) (DC: dc1)
    2017/06/08 09:09:50 [INFO] consul: adding WAN server server2.dc1 (Addr: <host_ip>:9300) (DC: dc1)
    2017/06/08 09:09:50 [ERR] agent: failed to sync remote state: No cluster leader
    2017/06/08 09:09:50 [INFO] agent: Joining cluster...
    2017/06/08 09:09:50 [INFO] agent: (LAN) joining: [<host_ip>:8301 <host_ip>:10301]
    2017/06/08 09:09:50 [INFO] serf: EventMemberJoin: <host> <host_ip>
    2017/06/08 09:09:50 [INFO] consul: adding LAN server <host> (Addr: <host_ip>:8300) (DC: dc1)
    2017/06/08 09:09:50 [INFO] agent: (LAN) joined: 1 Err: <nil>
    2017/06/08 09:09:50 [INFO] agent: Join completed. Synced with 1 initial agents
    2017/06/08 09:09:50 [WARN] raft: Failed to get previous log: 36233 log not found (last: 36230)
    2017/06/08 09:09:50 [INFO] raft: Removed ourself, transitioning to follower
    2017/06/08 09:09:50 [INFO] raft: Removed ourself, transitioning to follower
    2017/06/08 09:09:52 [WARN] memberlist: Was able to reach <host> via TCP but not UDP, network may be misconfigured and not allowing bidirectional UDP
==> Newer Consul version available: 0.8.3
    2017/06/08 09:09:54 [WARN] memberlist: Was able to reach <host> via TCP but not UDP, network may be misconfigured and not allowing bidirectional UDP
    2017/06/08 09:09:56 [WARN] memberlist: Was able to reach <host> via TCP but not UDP, network may be misconfigured and not allowing bidirectional UDP
    2017/06/08 09:09:57 [WARN] memberlist: Was able to reach <host> via TCP but not UDP, network may be misconfigured and not allowing bidirectional UDP

Consul agent -- [UDP] --> Consul Server
Consul agent <--[UDP] --  Consul Server