Spring Cloud Consul(2)Cluster

Spring Cloud Consul(2)Cluster
Install on Ubuntu
> wget https://releases.hashicorp.com/consul/1.4.0/consul_1.4.0_linux_amd64.zip
> unzip consul_1.4.0_linux_amd64.zip
Prepare the working directory
> mkdir ~/tool/consul-1.4.0
> mkdir ~/tool/consul-1.4.0/bin
Add to the PATH and check the installation
> consul version
Consul v1.4.0
Install on CentOS
> wget https://releases.hashicorp.com/consul/1.4.0/consul_1.4.0_linux_amd64.zip
Unzip and prepare the working directory
> mkdir -p ~/tool/consul-1.4.0/bin
> vi ~/.bash_profile
Check version on CentOS
> consul version
Consul v1.4.0
Prepare the Data directory, Start Master with -server Mode
> mkdir /opt/consul/data
> mkdir /opt/consul/conf
> consul agent -server -bootstrap -data-dir /opt/consul/data -node=agent-1 -bind=192.168.56.101 -advertise=192.168.56.101 -client=0.0.0.0 -config-dir /opt/consul/conf -datacenter dc1 -ui
Prepare the data and conf directory and start the Second Node Joining the Cluster
> consul agent -server -data-dir /opt/consul/data -node=agent-2 -bind=192.168.56.102 -advertise=192.168.56.102 -client=0.0.0.0 -config-dir /opt/consul/conf -datacenter dc1 -ui -retry-join "192.168.56.101"
Only one machine can start in -bootstrap mode, then We can visit the cluster in
http://ubuntu-master:8500/ui/dc1/services
Check members
> consul members
Node     Address              Status  Type    Build  Protocol  DC   Segment
agent-1  192.168.56.101:8301  alive   server  1.4.0  2         dc1  <all>
agent-2  192.168.56.102:8301  alive   server  1.4.0  2         dc1  <all>
Check IP on the ubuntu-master machine
> local_ip="`/sbin/ifconfig -a|grep inet|grep -v 127.0.0.1|grep -v inet6|awk '{print $2}'|tr -d "addr:"`"
>  echo $local_ip
172.17.0.1 10.0.2.15 192.168.56.101
This can set up the default health check
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
/actuator/health
We can also implement the health check controller ourselves.
We can change the Producer API and Consumer API to connect to the cluster and Customer the Health Check if we need to.
Producer API 1
spring:
application:
  name: springcloud-consul-producer
cloud:
  consul:
   host: ubuntu-master
   port: 8500
   discovery:
    hostname: ubuntu-master
    enabled: true
    serviceName: consul-producer
    health-check-interval: 10s
    register: true
    health-check-path: /health
    tags: owner=Sillycat
server:
port: 8501
Health Check
    @GetMapping("/health")
    public String health(){
        return "hello consul";
    }
Producer API 2
spring:
application:
  name: springcloud-consul-producer
cloud:
  consul:
   host: ubuntu-master
   port: 8500
   discovery:
    hostname: centos-dev1
    enabled: true
    serviceName: consul-producer
    health-check-interval: 10s
    register: true
    health-check-path: /health
    tags: owner=Kiko
server:
port: 8502
Health Check
    @GetMapping("/health")
    public String health(){
        return "hello consul";
    }
More Configuration
https://www.imooc.com/article/22441
Check the Cluster from my Local
> consul members -http-addr=ubuntu-master:8500
Node     Address              Status  Type    Build  Protocol  DC   Segment
agent-1  192.168.56.101:8301  alive   server  1.4.0  2         dc1  <all>
agent-2  192.168.56.102:8301  alive   server  1.4.0  2         dc1  <all>
It can be used as the configuration sharing center
https://gitbook.cn/books/5b38d875d00fdd680bb774e8/index.html

References:
https://my.oschina.net/tree/blog/1594206