Consul快速⼊门（⼆）：Consul集安装部署1、安装
1.1、下载
下载后上传到linux服务器，或者直接在linux上下载，版本可⾃⾏替换
口型钢wget releases.hashicorp/consul/1.7.0/consul_1.7.0_linux_amd64.zip
1.2、解压缩
unzip consul_1.7.0_linux_amd64.zip -d /usr/local/bin
1.3、设置环境变量
笔者已经将/usr/local/bin⽬录设置到环境变量中，如果你还没有设置环境变量，需要设置下
$ vi /etc/profile
export CONSUL_HOME=/usr/local/bin/consul
export PATH=$PATH:CONSUL_HOME
使⽤环境变量配置⽣效
source /etc/profile
1.4、验证
[root@localhost ~]# consul version
Consul v1.7.0
Protocol 2 spoken by default, understands 2 to 3 (agent will automatically use protocol >2 when speaking to compatible agents) 2、运⾏
consul以agent的⽅式启动，相关参数说明：
-server 以服务端模式运⾏，相应的还有客户端模式-client -ui 启动内置的Web UI
-bootstrap-expect=3 集最少节点数，类似zookeeper的配置⼀样，为了防⽌脑裂，⼀般为奇数
-data-dir=/data/consul 数据存储⽬录 -node=agent-1 集的节点名称
-client=0.0.0.0 指定客户端能访问的ip，类似于ip⽩名单。0.0.0.0表⽰不限制
-bind=10.25.84.163 绑定了当前主机的IP地址
-datacenter=dc1 数据中⼼名称
-join agent启动时加⼊到代理服务器地址，不指定不会加⼊任何节点，可以在启动后通过consul join命令加⼊更多参数说明可以通过–help查看
consul agent --help
2.2、启动agent
接下来搭建consul集，⾸先准备三台服务器：
10.25.84.163
10.25.84.164
10.25.84.165
分别在三台服务器输⼊以下对应的命令：
// 启动10.25.84.163
consul agent -server -ui -bootstrap-expect=3 -data-dir=/data/consul -node=server-1 -client=0.0.0.0 -bind=10.25.84.163 -datacenter=dc1
// 启动10.25.84.164，并加⼊10.25.84.163节点
consul agent -server -ui -bootstrap-expect=3 -data-dir=/data/consul -node=server-2 -client=0.0.0.0 -bind=10.25.84.164 -datacenter=dc1 -join 10.25.84.163
// 启动10.25.84.165，并加⼊10.25.84.163节点
consul agent -server -ui -bootstrap-expect=3 -data-dir=/data/consul -node=server-3 -client=0.0.0.0 -bind=10.25.84.165 -datacenter=dc1 -join 10.25.84.163
启动⽇志：
[root@localhost ~]# consul agent -server -ui -bootstrap-expect=3 -data-dir=/data/consul -node=server-1 -client=0.0.0.0 -bind=10.25.84.163 -datacenter=dc 1
bootstrap_expect > 0: expecting 3 servers
==> Starting
Version: 'v1.7.0'
Node ID: '4a60c9bd-472b-01a3-57f4-c74b8ba4d3df'
Node name: 'server-1'
Datacenter: 'dc1' (Segment: '<all>')
Server: true (Bootstrap: false)
Client Addr: [0.0.0.0] (HTTP: 8500, HTTPS: -1, gRPC: -1, DNS: 8600)
Cluster Addr: 10.25.84.163 (LAN: 8301, WAN: 8302)
Encrypt: Gossip: false, TLS-Outgoing: false, TLS-Incoming: false, Auto-Encrypt-TLS: false
==> Log data will now stream in as it occurs:
2020-02-21T11:28:20.323+0800 [INFO] agent.server.raft: initial configuration: index=0 servers=[]
2020-02-21T11:28:20.324+0800 [INFO] agent.server.raft: entering follower state: follower="Node at 10.25.84.163:8300 [Follower]" leader=
2020-02-21T11:28:20.325+0800 [INFO] agent.server.serf.wan: serf: EventMemberJoin: server-1.dc1 10.25.84.163
2020-02-21T11:28:20.326+0800 [INFO] agent.server.serf.lan: serf: EventMemberJoin: server-1 10.25.84.163
2020-02-21T11:28:20.326+0800 [INFO] agent.server: Adding LAN server: server="server-1 (Addr: tcp/10.25.84.163:8300) (DC: dc1)"
2020-02-21T11:28:20.326+0800 [INFO] agent.server: Handled event for server in area: event=member-join server=server-1.dc1 area=wan
2020-02-21T11:28:20.327+0800 [INFO] agent: Started DNS server: address=0.0.0.0:8600 network=tcp
2020-02-21T11:28:20.327+0800 [INFO] agent: Started DNS server: address=0.0.0.0:8600 network=udp
2020-02-21T11:28:20.328+0800 [INFO] agent: Started HTTP server: address=[::]:8500 network=tcp
2020-02-21T11:28:20.328+0800 [INFO] agent: started state syncer
==> Consul agent running!
2020-02-21T11:28:26.317+0800 [WARN] agent.server.raft: no known peers, aborting election
2020-02-21T11:28:27.447+0800 [ERROR] agent.anti_entropy: failed to sync remote state: error="No cluster leader"
渗透印章2020-02-21T11:28:34.785+0800 [ERROR] agent.http: Request error: method=GET url=/v1/internal/ui/services?dc=dc1&index=10249 from=10.113.116. 192:3000 error="No cluster leader"
2020-02-21T11:28:34.965+0800 [ERROR] agent.http: Request error: method=GET url=/v1/internal/ui/nodes?dc=dc1&index=10249 from=10.113.116.19 2:3001 error="No cluster leader"
2020-02-21T11:28:45.387+0800 [ERROR] agent: Coordinate update error: error="No cluster leader"
2020-02-21T11:28:59.448+0800 [ERROR] agent.anti_entropy: failed to sync remote state: error="No cluster leader"
2020-02-21T11:29:02.697+0800 [INFO] agent.server.serf.lan: serf: EventMemberJoin: server-2 10.25.84.164
2020-02-21T11:29:02.697+0800 [INFO] agent.server: Adding LAN server: server="server-2 (Addr: tcp/10.25.84.164:8300) (DC: dc1)"
2020-02-21T11:29:02.698+0800 [INFO] agent.server.serf.wan: serf: EventMemberJoin: server-2.dc1 10.25.84.164
2020-02-21T11:29:02.698+0800 [INFO] agent.server: Handled event for server in area: event=member-join server=server-2.dc1 area=wan
2020-02-21T11:29:19.312+0800 [ERROR] agent: Coordinate update error: error="No cluster leader"
2020-02-21T11:29:21.261+0800 [INFO] agent.server.serf.lan: serf: EventMemberJoin: server-3 10.25.84.165
2020-02-21T11:29:21.261+0800 [INFO] agent.server: Adding LAN server: server="server-3 (Addr: tcp/10.25.84.165:8300) (DC: dc1)"
洗头床
2020-02-21T11:29:21.269+0800 [INFO] agent.server: Found expected number of peers, attempting bootstrap: peers=10.25.84.163:8300,10.25.84.164: 8300,10.25.84.165:8300
2020-02-21T11:29:21.281+0800 [INFO] agent.server.serf.wan: serf: EventMemberJoin: server-3.dc1 10.25.84.165
2020-02-21T11:29:21.281+0800 [INFO] agent.server: Handled event for server in area: event=member-join server=server-3.dc1 area=wan
2020-02-21T11:29:24.003+0800 [ERROR] agent.anti_entropy: failed to sync remote state: error="No cluster leader"
2020-02-21T11:29:24.003+0800 [ERROR] agent.anti_entropy: failed to sync remote state: error="No cluster leader"
2020-02-21T11:29:27.329+0800 [WARN] agent.server.raft: heartbeat timeout reached, starting election: last-leader=
2020-02-21T11:29:27.329+0800 [INFO] agent.server.raft: entering candidate state: node="Node at 10.25.84.163:8300 [Candidate]" term=2
2020-02-21T11:29:27.351+0800 [INFO] agent.server.raft: election won: tally=2
2020-02-21T11:29:27.351+0800 [INFO] agent.server.raft: entering leader state: leader="Node at 10.25.84.163:8300 [Leader]"
2020-02-21T11:29:27.351+0800 [INFO] agent.server.raft: added peer, starting replication: peer=b3d84299-a458-19bf-2b98-ca9031e6aea4
2020-02-21T11:29:27.351+0800 [INFO] agent.server.raft: added peer, starting replication: peer=31174405-571f-f598-ef74-0a9aba59a6a8
2020-02-21T11:29:27.351+0800 [INFO] agent.server: cluster leadership acquired
2020-02-21T11:29:27.351+0800 [INFO] agent.server: New leader elected: payload=server-1
2020-02-21T11:29:27.352+0800 [INFO] agent.server.raft: pipelining replication: peer="{Voter 31174405-571f-f598-ef74-0a9aba59a6a8 10.25.84.165:8 300}"
2020-02-21T11:29:27.352+0800 [WARN] agent.server.raft: appendEntries rejected, sending older logs: peer="{Voter b3d84299-a458-19bf-2b98-ca903 1e6aea4 10.25.84.164:8300}" next=1
2020-02-21T11:29:27.356+0800 [INFO] agent.server.raft: pipelining replication: peer="{Voter b3d84299-a458-19bf-2b98-ca9031e6aea4 10.25.84.164: 8300}"
2020-02-21T11:29:27.368+0800 [INFO] agent.leader: started routine: routine="CA root pruning"
2020-02-21T11:29:27.368+0800 [INFO] agent.server: member joined, marking health alive: member=server-1
2020-02-21T11:29:27.381+0800 [INFO] agent.server: member joined, marking health alive: member=server-2
2020-02-21T11:29:27.396+0800 [INFO] agent.server: member joined, marking health alive: member=server-3
2020-02-21T11:29:28.609+0800 [INFO] agent: Synced node info
查看集启动结果：
[root@localhost ~]# consul members
Node Address Status Type Build Protocol DC Segment
server-1 10.25.84.163:8301 alive server 1.7.0 2 dc1 <all>
server-2 10.25.84.164:8301 alive server 1.7.0 2 dc1 <all>
server-3 10.25.84.165:8301 alive server 1.7.0 2 dc1 <all>
命令输出显⽰了集节点名称、IP端⼝、健康状态、启动模式、所在数据中⼼和版本信息。
2.3、访问Consul的WebUI控制台
三台服务都起来后，我们可以访问Consul的WebUI控制台，WEB控制台默认端⼝为：8500，在浏览器输⼊地址：
切换nodes标签页：
3、查看数据中⼼
到⽬前为⽌，我们已经搭建好数据中⼼了，现在我们可以查看下数据中⼼中的成员
3.1、通过members命令查看
members命令针对Consul客户端运⾏，该客户端通过gossip协议获取其信息。
[root@localhost ~]# consul members
Node Address Status Type Build Protocol DC Segment
server-1 10.25.84.163:8301 alive server 1.7.0 2 dc1 <all>
server-2 10.25.84.164:8301 alive server 1.7.0 2 dc1 <all>
server-3 10.25.84.165:8301 alive server 1.7.0 2 dc1 <all>
命令输出显⽰了数据中⼼的节点、IP端⼝、健康状态、⾓⾊、所在数据中⼼和版本信息。
还可以⽤过 -detailed 参数获取更多信息
[root@localhost ~]# consul members -detailed
Node Address Status Tags
server-1 10.25.84.163:8301 alive acls=0,build=1.7.0:95fb95bf,dc=dc1,expect=3,id=4a60c9bd-472b-01a3-57f4-c74b8ba4d3df,port=8300,raft_vsn=3,role =consul,segment=<all>,vsn=2,vsn_max=3,vsn_min=2,wan_join_port=8302
server-2 10.25.84.164:8301 alive acls=0,build=1.7.0:95fb95bf,dc=dc1,expect=3,id=b3d84299-a458-19bf-2b98-ca9031e6aea4,port=8300,raft_vsn=3,role =consul,segment=<all>,vsn=2,vsn_max=3,vsn_min=2,wan_join_port=8302
server-3 10.25.84.165:8301 alive acls=0,build=1.7.0:95fb95bf,dc=dc1,expect=3,id=31174405-571f-f598-ef74-0a9aba59a6a8,port=8300,raft_vsn=3,role= consul,segment=<all>,vsn=2,vsn_max=3,vsn_min=2,wan_join_port=8302棉花液压打包机
3.2、通过HTTP API查看
curl 10.25.84.163:8500/v1/catalog/nodes
返回数据：
[
{
"ID":"99f8e10c-edda-bb40-21b4-8719ba851308",
"Node":"agent-1",
"Address":"10.25.84.163",
"Datacenter":"dc1",
"TaggedAddresses":{
"lan":"10.25.84.163",
"lan_ipv4":"10.25.84.163",
"wan":"10.25.84.163",
"wan_ipv4":"10.25.84.163"
},
"Meta":{
"consul-network-segment":""
},
"CreateIndex":5,
"ModifyIndex":11
},
{
"ID":"824a86e6-9713-a136-8037-c489222a88e1",
"Node":"agent-2",
"Address":"10.25.84.164",
"Datacenter":"dc1",
"TaggedAddresses":{
柴油脱
"lan":"10.25.84.164",
"lan_ipv4":"10.25.84.164",
"wan":"10.25.84.164",
"wan_ipv4":"10.25.84.164"
},
"Meta":{
"consul-network-segment":""
},
"CreateIndex":7,
"ModifyIndex":10
},
{
"ID":"5f073f8b-2130-254d-c83f-30d7850e2192",
"Node":"agent-3",
"Address":"10.25.84.165",
"Datacenter":"dc1",
"TaggedAddresses":{
"lan":"10.25.84.165",
草坪卷"lan_ipv4":"10.25.84.165",
"wan":"10.25.84.165",
"wan_ipv4":"10.25.84.165"
},
"Meta":{
"consul-network-segment":""
},
"CreateIndex":8,
"ModifyIndex":9
}
]
3.3、通过DNS接⼝查看
除了HTTP API外，我们还可以使⽤DNS接⼝查看数据中⼼成员信息
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