consul是什么
简单来说，consul就是一个用于微服务治理的系统，什么是微服务，这个大家自行了解。consul的主要功能有如下几个：
- 服务注册
- 服务发现
- KV数据存储
- 配置管理
- 分布式锁
- 服务监控
- 。。。
下面就简单来实际操作一把
搭建集群
1、创建目录
代码语言：javascript复制[root@ts consul]# ll /opt/consul/
total 110464
drwxr-x--- 2 root root 4096 Oct 19 15:45 conf
-rwxr-x--- 1 root root 113093117 Oct 19 14:33 consul
-rw-r----- 1 root root 5 Oct 19 14:54 consul.pid
drwxr-x--- 4 root root 4096 Oct 19 14:54 data
drwxr-x--- 2 root root 4096 Oct 19 15:28 log
drwxr-x--- 2 root root 4096 Oct 19 14:54 ui上面只是一个示例，大家可以根据自己的目录结构来。
2、配置文件
代码语言：javascript复制{
"bootstrap": true,
"server": true,
"datacenter": "ts-test",
"data_dir": "/opt/consul/data",
"pid_file": "/opt/consul/consul.pid",
"ui_dir": "/opt/consul/ui",
"client_addr": "0.0.0.0",
"node_name": "ts-test-42",
"rejoin_after_leave": true,
"log_level": "INFO",
"bind_addr":"30.1.3.42"
}根据上面创建的目录文件路径、节点等信息，编写如上配置文件信息，保存文件为main.json，并放入conf文件夹下。
3、启动服务
执行如下命令：
代码语言：javascript复制nohup /opt/consul/consul agent -config-file=/opt/consul/conf/main.json > /opt/consul/log/consul.log 2>&1 &同样的，在节点2上也进行如上步骤操作，注意，一定要将bootstrap改为false，因为一个集群只能有一个bootstrap为true。否则，会出现如下错误：
代码语言：javascript复制 2020-10-19T15:01:36.327 0800 [INFO] agent.server.serf.lan: serf: EventMemberJoin: ts-test-43 30.1.3.43
2020-10-19T15:01:36.327 0800 [INFO] agent.server: Adding LAN server: server="ts-test-43 (Addr: tcp/30.1.3.43:8300) (DC: ts-test)"
2020-10-19T15:01:36.327 0800 [INFO] agent.server: New leader elected: payload=ts-test-43
2020-10-19T15:01:36.327 0800 [ERROR] agent.server: Two nodes are in bootstrap mode. Only one node should be in bootstrap mode, not adding Raft peer.: node_to_add=ts-test-43 other=ts-test-42
2020-10-19T15:01:36.327 0800 [INFO] agent.server: member joined, marking health alive: member=ts-test-43
2020-10-19T15:01:36.328 0800 [INFO] agent.server.serf.wan: serf: EventMemberJoin: ts-test-43.ts-test 30.1.3.43
2020-10-19T15:01:36.328 0800 [INFO] agent.server: Handled event for server in area: event=member-join server=ts-test-43.ts-test area=wan
2020-10-19T15:01:51.343 0800 [ERROR] agent.server: Two nodes are in bootstrap mode. Only one node should be in bootstrap mode, not adding Raft peer.: node_to_add=ts-test-42 other=ts-test-43
2020-10-19T15:01:51.343 0800 [ERROR] agent.server: Two nodes are in bootstrap mode. Only one node should be in bootstrap mode, not adding Raft peer.: node_to_add=ts-test-43 other=ts-test-42
2020-10-19T15:02:51.341 0800 [ERROR] agent.server: Two nodes are in bootstrap mode. Only one node should be in bootstrap mode, not adding Raft peer.: node_to_add=ts-test-42 other=ts-test-43
2020-10-19T15:02:51.341 0800 [ERROR] agent.server: Two nodes are in bootstrap mode. Only one node should be in bootstrap mode, not adding Raft peer.: node_to_add=ts-test-43 other=ts-test-42
2020-10-19T15:03:51.341 0800 [ERROR] agent.server: Two nodes are in bootstrap mode. Only one node should be in bootstrap mode, not adding Raft peer.: node_to_add=ts-test-42 other=ts-test-43
2020-10-19T15:03:51.341 0800 [ERROR] agent.server: Two nodes are in bootstrap mode. Only one node should be in bootstrap mode, not adding Raft peer.: node_to_add=ts-test-43 other=ts-test-42
2020-10-19T15:04:51.342 0800 [ERROR] agent.server: Two nodes are in bootstrap mode. Only one node should be in bootstrap mode, not adding Raft peer.: node_to_add=ts-test-42 other=ts-test-43
2020-10-19T15:04:51.342 0800 [ERROR] agent.server: Two nodes are in bootstrap mode. Only one node should be in bootstrap mode, not adding Raft peer.: node_to_add=ts-test-43 other=ts-test-42
2020-10-19T15:05:51.342 0800 [ERROR] agent.server: Two nodes are in bootstrap mode. Only one node should be in bootstrap mode, not adding Raft peer.: node_to_add=ts-test-42 other=ts-test-43
2020-10-19T15:05:51.342 0800 [ERROR] agent.server: Two nodes are in bootstrap mode. Only one node should be in bootstrap mode, not adding Raft peer.: node_to_add=ts-test-43 other=ts-test-42
2020-10-19T15:06:51.343 0800 [ERROR] agent.server: Two nodes are in bootstrap mode. Only one node should be in bootstrap mode, not adding Raft peer.: node_to_add=ts-test-42 other=ts-test-43
2020-10-19T15:06:51.343 0800 [ERROR] agent.server: Two nodes are in bootstrap mode. Only one node should be in bootstrap mode, not adding Raft peer.: node_to_add=ts-test-43 other=ts-test-424、加入集群
在第二个节点上执行如下命令：
代码语言：javascript复制consul join 30.1.3.425、查看集群信息
在节点1上执行：
代码语言：javascript复制[root@ts consul]# ./consul info
agent:
check_monitors = 0
check_ttls = 0
checks = 0
services = 0
build:
prerelease =
revision = 12b16df3
version = 1.8.4
consul:
acl = disabled
bootstrap = false
known_datacenters = 1
leader = true
leader_addr = 30.1.3.43:8300
server = true
raft:
applied_index = 880
commit_index = 880
fsm_pending = 0
last_contact = 0
last_log_index = 880
last_log_term = 135
last_snapshot_index = 0
last_snapshot_term = 0
latest_configuration = [{Suffrage:Voter ID:e34ff4b2-5f71-8d7a-bc25-784827f27dab Address:30.1.3.42:8300} {Suffrage:Voter ID:082ea273-263c-2de8-9516-3eb6c223071c Address:30.1.3.43:8300}]
latest_configuration_index = 0
num_peers = 1
protocol_version = 3
protocol_version_max = 3
protocol_version_min = 0
snapshot_version_max = 1
snapshot_version_min = 0
state = Leader
term = 135关注consul信息，可以看到leader = true，表示是主节点
在另一个节点执行
代码语言：javascript复制[root@ts1 consul]# ./consul info
agent:
check_monitors = 1
check_ttls = 0
checks = 1
services = 1
build:
prerelease =
revision = 12b16df3
version = 1.8.4
consul:
acl = disabled
bootstrap = true
known_datacenters = 1
leader = false
leader_addr = 30.1.3.43:8300
server = true
raft:
applied_index = 888
commit_index = 888
fsm_pending = 0
last_contact = 23.765731ms
last_log_index = 888
last_log_term = 135
last_snapshot_index = 0
last_snapshot_term = 0
latest_configuration = [{Suffrage:Voter ID:e34ff4b2-5f71-8d7a-bc25-784827f27dab Address:30.1.3.42:8300} {Suffrage:Voter ID:082ea273-263c-2de8-9516-3eb6c223071c Address:30.1.3.43:8300}]
latest_configuration_index = 0
num_peers = 1
protocol_version = 3
protocol_version_max = 3
protocol_version_min = 0
snapshot_version_max = 1
snapshot_version_min = 0
state = Follower
term = 135可以看到leader = false，说明是一个备节点
验证数据同步
1、增加kv存储
在一个节点上执行如下命令：
代码语言：javascript复制[root@ts consul]# ./consul kv put ts/test/name 'ts'
Success! Data written to: ts/test/name2、查询kv存储
在另外一个节点上执行如下命令：
代码语言：javascript复制[root@ts consul]# ./consul kv get ts/test/name
ts可以发现，节点间的数据是共享的。
验证集群可用性
因为consul使用的raft一致性协议，该协议是是强一致性的，因为一般要求部署单数节点，也就是说3个节点，挂1个可用，5个节点挂2个可用。如果是两节点，挂1个，整个集群就不可用了。
我们将其中一个节点停掉，然后我们可以看到另外一个节点：
代码语言：javascript复制 2020-10-19T15:32:59.680 0800 [ERROR] agent.server.raft: failed to appendEntries to: peer="{Nonvoter 082ea273-263c-2de8-9516-3eb6c223071c 30.1.3.43:8300}" error="dial tcp 30.1.3.42:0->30.1.3.43:8300: connect: connection refused"
2020-10-19T15:32:59.816 0800 [ERROR] agent.server.raft: failed to appendEntries to: peer="{Nonvoter 082ea273-263c-2de8-9516-3eb6c223071c 30.1.3.43:8300}" error="dial tcp 30.1.3.42:0->30.1.3.43:8300: connect: connection refused"
2020-10-19T15:33:00.058 0800 [ERROR] agent.server.raft: failed to appendEntries to: peer="{Nonvoter 082ea273-263c-2de8-9516-3eb6c223071c 30.1.3.43:8300}" error="dial tcp 30.1.3.42:0->30.1.3.43:8300: connect: connection refused"
2020-10-19T15:33:00.344 0800 [WARN] agent: error getting server health from server: server=ts-test-43 error="context deadline exceeded"
2020-10-19T15:33:00.463 0800 [ERROR] agent.server.raft: failed to appendEntries to: peer="{Nonvoter 082ea273-263c-2de8-9516-3eb6c223071c 30.1.3.43:8300}" error="dial tcp 30.1.3.42:0->30.1.3.43:8300: connect: connection refused"
2020-10-19T15:33:00.518 0800 [ERROR] agent.server.raft: failed to heartbeat to: peer=30.1.3.43:8300 error="dial tcp 30.1.3.42:0->30.1.3.43:8300: connect: connection refused"
2020-10-19T15:33:00.968 0800 [INFO] agent.server.memberlist.lan: memberlist: Suspect ts-test-43 has failed, no acks received
2020-10-19T15:33:01.035 0800 [ERROR] agent.server.raft: failed to heartbeat to: peer=30.1.3.43:8300 error="dial tcp 30.1.3.42:0->30.1.3.43:8300: connect: connection refused"
2020-10-19T15:33:01.197 0800 [ERROR] agent.server.raft: failed to appendEntries to: peer="{Nonvoter 082ea273-263c-2de8-9516-3eb6c223071c 30.1.3.43:8300}" error="dial tcp 30.1.3.42:0->30.1.3.43:8300: connect: connection refused"
2020-10-19T15:33:01.345 0800 [WARN] agent: error getting server health from server: server=ts-test-43 error="rpc error getting client: failed to get conn: dial tcp 30.1.3.42:0->30.1.3.43:8300: connect: connection refused"
2020-10-19T15:33:01.604 0800 [ERROR] agent.server.raft: failed to heartbeat to: peer=30.1.3.43:8300 error="dial tcp 30.1.3.42:0->30.1.3.43:8300: connect: connection refused"
2020-10-19T15:33:01.716 0800 [WARN] agent.server.raft: failed to contact: server-id=082ea273-263c-2de8-9516-3eb6c223071c time=2.500086438s
2020-10-19T15:33:01.716 0800 [WARN] agent.server.raft: failed to contact quorum of nodes, stepping down
2020-10-19T15:33:01.716 0800 [INFO] agent.server.raft: entering follower state: follower="Node at 30.1.3.42:8300 [Follower]" leader=
2020-10-19T15:33:02.343 0800 [WARN] agent: error getting server health from server: server=ts-test-43 error="context deadline exceeded"
2020-10-19T15:33:02.344 0800 [INFO] agent.server: cluster leadership lost
2020-10-19T15:33:02.528 0800 [ERROR] agent.server.raft: failed to heartbeat to: peer=30.1.3.43:8300 error="dial tcp 30.1.3.42:0->30.1.3.43:8300: connect: connection refused"
2020-10-19T15:33:02.578 0800 [ERROR] agent.server.raft: failed to appendEntries to: peer="{Nonvoter 082ea273-263c-2de8-9516-3eb6c223071c 30.1.3.43:8300}" error="dial tcp 30.1.3.42:0->30.1.3.43:8300: connect: connection refused"
2020-10-19T15:33:03.968 0800 [INFO] agent.server.memberlist.lan: memberlist: Suspect ts-test-43 has failed, no acks received
2020-10-19T15:33:04.968 0800 [INFO] agent.server.memberlist.lan: memberlist: Marking ts-test-43 as failed, suspect timeout reached (0 peer confirmations)
2020-10-19T15:33:04.968 0800 [INFO] agent.server.serf.lan: serf: EventMemberFailed: ts-test-43 30.1.3.43
2020-10-19T15:33:04.968 0800 [INFO] agent.server: Removing LAN server: server="ts-test-43 (Addr: tcp/30.1.3.43:8300) (DC: ts-test)"
2020-10-19T15:33:06.967 0800 [INFO] agent.server.memberlist.wan: memberlist: Suspect ts-test-43.ts-test has failed, no acks received
2020-10-19T15:33:06.968 0800 [INFO] agent.server.memberlist.lan: memberlist: Suspect ts-test-43 has failed, no acks received
2020-10-19T15:33:11.702 0800 [WARN] agent.server.raft: heartbeat timeout reached, starting election: last-leader=
2020-10-19T15:33:11.702 0800 [INFO] agent.server.raft: entering candidate state: node="Node at 30.1.3.42:8300 [Candidate]" term=3
2020-10-19T15:33:11.706 0800 [WARN] agent.server.raft: unable to get address for sever, using fallback address: id=082ea273-263c-2de8-9516-3eb6c223071c fallback=30.1.3.43:8300 error="Could not find address for server id 082ea273-263c-2de8-9516-3eb6c223071c"
2020-10-19T15:33:11.707 0800 [ERROR] agent.server.raft: failed to make requestVote RPC: target="{Voter 082ea273-263c-2de8-9516-3eb6c223071c 30.1.3.43:8300}" error="dial tcp 30.1.3.42:0->30.1.3.43:8300: connect: connection refused"
2020-10-19T15:33:11.984 0800 [INFO] agent.server.serf.lan: serf: attempting reconnect to ts-test-43 30.1.3.43:8301
2020-10-19T15:33:13.784 0800 [ERROR] agent: Coordinate update error: error="No cluster leader"
2020-10-19T15:33:16.968 0800 [INFO] agent.server.memberlist.wan: memberlist: Suspect ts-test-43.ts-test has failed, no acks received
2020-10-19T15:33:18.551 0800 [WARN] agent.server.raft: Election timeout reached, restarting election
2020-10-19T15:33:18.551 0800 [INFO] agent.server.raft: entering candidate state: node="Node at 30.1.3.42:8300 [Candidate]" term=4
2020-10-19T15:33:18.555 0800 [WARN] agent.server.raft: unable to get address for sever, using fallback address: id=082ea273-263c-2de8-9516-3eb6c223071c fallback=30.1.3.43:8300 error="Could not find address for server id 082ea273-263c-2de8-9516-3eb6c223071c"
2020-10-19T15:33:18.555 0800 [ERROR] agent.server.raft: failed to make requestVote RPC: target="{Voter 082ea273-263c-2de8-9516-3eb6c223071c 30.1.3.43:8300}" error="dial tcp 30.1.3.42:0->30.1.3.43:8300: connect: connection refused"
2020-10-19T15:33:25.525 0800 [WARN] agent.server.raft: Election timeout reached, restarting election
2020-10-19T15:33:25.525 0800 [INFO] agent.server.raft: entering candidate state: node="Node at 30.1.3.42:8300 [Candidate]" term=5
2020-10-19T15:33:25.541 0800 [WARN] agent.server.raft: unable to get address for sever, using fallback address: id=082ea273-263c-2de8-9516-3eb6c223071c fallback=30.1.3.43:8300 error="Could not find address for server id 082ea273-263c-2de8-9516-3eb6c223071c"
2020-10-19T15:33:25.542 0800 [ERROR] agent.server.raft: failed to make requestVote RPC: target="{Voter 082ea273-263c-2de8-9516-3eb6c223071c 30.1.3.43:8300}" error="dial tcp 30.1.3.42:0->30.1.3.43:8300: connect: connection refused"
2020-10-19T15:33:34.492 0800 [WARN] agent.server.raft: Election timeout reached, restarting election
2020-10-19T15:33:34.492 0800 [INFO] agent.server.raft: entering candidate state: node="Node at 30.1.3.42:8300 [Candidate]" term=6
2020-10-19T15:33:34.496 0800 [WARN] agent.server.raft: unable to get address for sever, using fallback address: id=082ea273-263c-2de8-9516-3eb6c223071c fallback=30.1.3.43:8300 error="Could not find address for server id 082ea273-263c-2de8-9516-3eb6c223071c"
2020-10-19T15:33:34.496 0800 [ERROR] agent.server.raft: failed to make requestVote RPC: target="{Voter 082ea273-263c-2de8-9516-3eb6c223071c 30.1.3.43:8300}" error="dial tcp 30.1.3.42:0->30.1.3.43:8300: connect: connection refused"
2020-10-19T15:33:36.967 0800 [INFO] agent.server.memberlist.wan: memberlist: Suspect ts-test-43.ts-test has failed, no acks received
2020-10-19T15:33:36.968 0800 [INFO] agent.server.memberlist.wan: memberlist: Marking ts-test-43.ts-test as failed, suspect timeout reached (0 peer confirmations)
2020-10-19T15:33:36.968 0800 [INFO] agent.server.serf.wan: serf: EventMemberFailed: ts-test-43.ts-test 30.1.3.43
2020-10-19T15:33:36.968 0800 [INFO] agent.server: Handled event for server in area: event=member-failed server=ts-test-43.ts-test area=wan
2020-10-19T15:33:39.937 0800 [WARN] agent.server.raft: Election timeout reached, restarting election可以看到，该节点虽然还在，但是一直处于选举状态，并且接口都不可用了
代码语言：javascript复制[root@ts consul]# ./consul kv get ts/test/name
Error querying Consul agent: Unexpected response code: 500服务注册
1、增加配置文件
在conf配置目录下增加ts.json配置文件
代码语言：javascript复制{
"service": {
"name": "ts42",
"tags": ["ts"],
"port": 28799
}
}2、查看服务
重启服务之后，执行如下命令：
代码语言：javascript复制[root@ts2 consul]# curl http://30.1.3.43:8500/v1/catalog/service/ts42 | python -m json.tool
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 580 100 580 0 0 405k 0 --:--:-- --:--:-- --:--:-- 566k
[
{
"ID": "e34ff4b2-5f71-8d7a-bc25-784827f27dab",
"Node": "ts-test-42",
"Address": "30.1.3.42",
"Datacenter": "ts-test",
"TaggedAddresses": {
"lan": "30.1.3.42",
"lan_ipv4": "30.1.3.42",
"wan": "30.1.3.42",
"wan_ipv4": "30.1.3.42"
},
"NodeMeta": {
"consul-network-segment": ""
},
"ServiceKind": "",
"ServiceID": "ts42",
"ServiceName": "ts42",
"ServiceTags": [
"ts"
],
"ServiceAddress": "",
"ServiceWeights": {
"Passing": 1,
"Warning": 1
},
"ServiceMeta": {},
"ServicePort": 28799,
"ServiceEnableTagOverride": false,
"ServiceProxy": {
"MeshGateway": {},
"Expose": {}
},
"ServiceConnect": {},
"CreateIndex": 527,
"ModifyIndex": 527
}
]可以看到该服务详细信息
查看所有服务：
代码语言：javascript复制[root@karbor2 consul]# curl http://30.1.3.43:8500/v1/catalog/services | python -m json.tool
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 35 100 35 0 0 28112 0 --:--:-- --:--:-- --:--:-- 35000
{
"consul": [],
"ts42": [
"ts"
]
}注：这里的接口展示的都是所有的服务，包括异常的服务。
服务监控
consul执行本地脚本检查、http接口检查、tcp接口检查，这里只演示本地脚本检查。
1、增加配置
同样的，在conf配置目录下的ts.json配置文件中增加如下配置：
代码语言：javascript复制{
"service": {
...
"checks": [{
"id": "check_ts",
"name": "test",
"args": ["/home/ts/ts_check.sh"],
"interval": "5s"
}]
}
}其中，/home/ts/ts_check.sh脚本如下：
代码语言：javascript复制#!/bin/bash
echo 'check pass' >> /home/ts/ts_check.log
exit 0注意这个脚本是用来检查服务状态的，根据自身情况编写相应代码，这里只是示例；其中，脚本的返回码会被作为consul用来判断服务是否正常的依据：
- 0——服务正常
- 1——服务告警
- 其他——服务异常
监控日志记录：
代码语言：javascript复制check pass
check pass
check pass
check pass
check pass
check pass
check pass
check pass
check pass可以发现consul在定时执行该脚本
2、查看服务状态
代码语言：javascript复制[root@ts consul]# curl http://30.1.3.43:8500/v1/health/service/ts42 | python -m json.tool
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 1051 100 1051 0 0 697k 0 --:--:-- --:--:-- --:--:-- 1026k
[
{
"Node": {
"ID": "e34ff4b2-5f71-8d7a-bc25-784827f27dab",
"Node": "ts-test-42",
"Address": "30.1.3.42",
"Datacenter": "ts-test",
"TaggedAddresses": {
"lan": "30.1.3.42",
"lan_ipv4": "30.1.3.42",
"wan": "30.1.3.42",
"wan_ipv4": "30.1.3.42"
},
"Meta": {
"consul-network-segment": ""
},
"CreateIndex": 9,
"ModifyIndex": 404
},
"Service": {
"ID": "ts42",
"Service": "ts42",
"Tags": [
"ts"
],
"Address": "",
"Meta": null,
"Port": 28799,
"Weights": {
"Passing": 1,
"Warning": 1
},
"EnableTagOverride": false,
"Proxy": {
"MeshGateway": {},
"Expose": {}
},
"Connect": {},
"CreateIndex": 527,
"ModifyIndex": 527
},
"Checks": [
{
"Node": "ts-test-42",
"CheckID": "serfHealth",
"Name": "Serf Health Status",
"Status": "passing",
"Notes": "",
"Output": "Agent alive and reachable",
"ServiceID": "",
"ServiceName": "",
"ServiceTags": [],
"Type": "",
"Definition": {},
"CreateIndex": 9,
"ModifyIndex": 9
},
{
"Node": "ts-test-42",
"CheckID": "check_ts",
"Name": "test",
"Status": "passing",
"Notes": "",
"Output": "",
"ServiceID": "ts42",
"ServiceName": "ts42",
"ServiceTags": [
"ts"
],
"Type": "script",
"Definition": {},
"CreateIndex": 629,
"ModifyIndex": 860
}
]
}
]返回信息中的"Status": "passing"就表示该服务正常。
3、异常构造
我们将/home/ts/ts_check.sh脚本修改如下：
代码语言：javascript复制#!/bin/bash
echo 'check not pass' >> /home/ts/ts_check.log
exit -1再次查看服务状态：
代码语言：javascript复制[root@ts consul]# curl http://30.1.3.43:8500/v1/health/service/ts42 | python -m json.tool
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 1051 100 1051 0 0 697k 0 --:--:-- --:--:-- --:--:-- 1026k
[
{
"Node": {
"ID": "e34ff4b2-5f71-8d7a-bc25-784827f27dab",
"Node": "ts-test-42",
"Address": "30.1.3.42",
"Datacenter": "ts-test",
"TaggedAddresses": {
"lan": "30.1.3.42",
"lan_ipv4": "30.1.3.42",
"wan": "30.1.3.42",
"wan_ipv4": "30.1.3.42"
},
"Meta": {
"consul-network-segment": ""
},
"CreateIndex": 9,
"ModifyIndex": 404
},
"Service": {
"ID": "ts42",
"Service": "ts42",
"Tags": [
"ts"
],
"Address": "",
"Meta": null,
"Port": 28799,
"Weights": {
"Passing": 1,
"Warning": 1
},
"EnableTagOverride": false,
"Proxy": {
"MeshGateway": {},
"Expose": {}
},
"Connect": {},
"CreateIndex": 527,
"ModifyIndex": 527
},
"Checks": [
{
"Node": "ts-test-42",
"CheckID": "serfHealth",
"Name": "Serf Health Status",
"Status": "passing",
"Notes": "",
"Output": "Agent alive and reachable",
"ServiceID": "",
"ServiceName": "",
"ServiceTags": [],
"Type": "",
"Definition": {},
"CreateIndex": 9,
"ModifyIndex": 9
},
{
"Node": "ts-test-42",
"CheckID": "check_ts",
"Name": "test",
"Status": "critical",
"Notes": "",
"Output": "",
"ServiceID": "ts42",
"ServiceName": "ts42",
"ServiceTags": [
"ts"
],
"Type": "script",
"Definition": {},
"CreateIndex": 629,
"ModifyIndex": 860
}
]
}
]返回信息中的"Status": "critical"就表示该服务异常。
