Consul - studiofu/brain GitHub Wiki

Quick Start

start consul server in dev mode

./consul agent -dev -ui -bind=192.168.1.88 -client=0.0.0.0

start consul server in single machine

consul agent -server -bootstrap-expect=1 -data-dir=consul-data -ui -bind=127.0.0.1

consul config sample config.json

{
    "bootstrap_expect": 3,
    "client_addr": "0.0.0.0",
    "datacenter": "Us-Central",
    "data_dir": "consul-data",
    "domain": "consul",
    "enable_script_checks": true,
    "dns_config": {
        "enable_truncate": true,
        "only_passing": true
    },
    "enable_syslog": true,
    "encrypt": "DLsT2sQlPjT34VUeeNXeBA==",
    "leave_on_terminate": true,
    "log_level": "INFO",
    "rejoin_after_leave": true,
    "server": true,
    "start_join": [
        "192.168.1.88"
    ],
    "ui": true
}

start consul in clustering mode

/consul agent -config-dir consul.d -ui -bind=192.168.1.88 -client=0.0.0.0

Build the spring boot application service, and set the environment variable CONSUL_PRODUCER which will be used in the demo-consul-producer application and then start more than one instance for services load balancing testing

the service will be registered to the consul

https://github.com/quantificial/demo-consul-producer

build the client for the testing

https://github.com/quantificial/demo-consul-client

build the zuul api gateway

https://github.com/quantificial/demo-consul-api-gateway.git http://www.manongjc.com/article/8181.html

Consul 搭建集群 - use vagrant to provision the machine

https://segmentfault.com/a/1190000015270309

start consul server in docker

also use fabio as gateway

docker run -d -t -p 8300:8300 -p 8301:8301 -p 8302:8302 -p 8500:8500 -p 8600:8600 --name test-consul consul:1.3.0

docker pull fabiolb/fabio:1.5.5-go1.9.2

docker run -d -t -p 9998:9998 -p 9999:9999 --link test-consul:consul -e 'registry_consul_addr=consul:8500' fabiolb/fabio:1.5.5-go1.9.2

start consul in windows / linux and in default consul will use port 9500

consul agent -server -bootstrap-expect=1 -data-dir=consul-data -ui -bind=127.0.0.1

consul agent -server -bootstrap-expect=1 -data-dir consul-data -node n1 -u1

consul agent -server -bootstrap-expect=1 -data-dir consul-data -node=n1 -datacenter=dc1 -ui -bind=127.0.0.1

consul members

try register services and perform query

curl -X PUT -d '{"Datacenter": "sz-1", "Node": "mysql-1", "Address": \
"mysql-1.node.consul","Service": {"Service": "mysql", "tags": ["master","v1"], \
"Port": 3306}}' http://127.0.0.1:8500/v1/catalog/register

curl -X PUT -d '{"Datacenter": "sz-1", "Node": "mysql-2", "Address": \
"mysql-2.node.consul","Service": {"Service": "mysql", "tags": ["slave","v1"],\
"Port": 3306}}' http://127.0.0.1:8500/v1/catalog/register

curl http://127.0.0.1:8500/v1/catalog/service/mysql

use consul join to form the cluster

consul join [ip address]

perform services registration and discovery by using com.orbitz.consul

<dependency>  
     <groupId>com.orbitz.consul</groupId>  
      <artifactId>consul-client</artifactId>  
      <version>0.12.3</version>  
</dependency>  

Consul client = Consul.builder().build();  
String serviceName = UUID.randomUUID().toString();  
String serviceId = UUID.randomUUID().toString();  
client.agentClient().register(8080, new URL("http://localhost:1337/health"), 1000L, serviceName, serviceId);  

HealthClient healthClient = Consul.newClient().healthClient();  
ConsulResponse<List<ServiceHealth>> response = client2.healthClient().getHealthyServiceInstances(serviceName);//获取健康的服务  
ServiceHealthCache svHealth = ServiceHealthCache.newCache(healthClient, serviceName);//创建今天服务  
svHealth.start();//开始监听服务

dns method for the service lookup, set the dns server as consul server in the docker

frontend-1:  
    image: josdirksen/demo-service
    container_name: Frontend1
    ports:
      - 8090:8090
    environment:
      - "constraint:node==nb1"
      - SERVER_ID=1
      - SERVERNAME=Server1
      - PORT=8090
    command: /entrypoint.sh --type frontend
    dns: 192.168.99.106
    dns_search: service.consul


# 从容器外部检查被调用的后端服务所注册的IP地址
$ dig @nb-consul.local backend-service.service.consul +short
10.0.9.7  
10.0.9.8  
10.0.9.6  
# 如果从容器内部的话，我们可以单纯的只做这一件事情
docker exec -ti nb2/Frontend2 ping backend-service  
PING backend-service.service.consul (10.0.9.8): 56 data bytes  
64 bytes from 10.0.9.8: icmp_seq=0 ttl=64 time=0.809 ms