consul是什么？
consul概念：
consul是用来做注册中心的 他和eureka是一样的 注册中心一般都是集群的形式存在
保证高可用 consul像是一个nosql 存储着键值对 可以做存储
consul是c/s架构的 其客户端负责和用户进行通讯 没有实际的意义 真正工作的是后端的服务端 存储数据也是在服务端存储
环境：
| 主机 | ip |
|---|---|
| consul-1 | 192.168.10.20 |
| consul-2 | 192.168.10.30 |
| consul-3 | 192.168.10.40 |
| client客户端 | 192.168.10.10 |
在第一、二台consul主机和第四台client主机上安装jdk和maven环境
安装jdk
[root@localhost ~]# java -version
openjdk version "1.8.0_102"
OpenJDK Runtime Environment (build 1.8.0_102-b14)
OpenJDK 64-Bit Server VM (build 25.102-b14, mixed mode)
[root@localhost ~]# rm -rf /usr/bin/java #删除原本主机上的Java程序
[root@localhost ~]# java -version
-bash: /usr/bin/java: 没有那个文件或目录
[root@localhost ~]# tar -zxf jdk-8u201-linux-x64.tar.gz
[root@localhost ~]# mv jdk1.8.0_201/ /usr/local/java
添加环境变量（通常情况我们使用第二种方法）
[root@localhost bin]# vim /etc/profile
#末尾添加
export JAVA_HOME=/usr/local/java
export JRE_HOME=/usr/local/java/jre
export CLASSPATH=$JAVA_HOME/lib:$JRE_HOME/lib
export PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
[root@localhost bin]# source /etc/profile
[root@localhost bin]# echo $PATH
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin:/usr/local/java/bin:/usr/local/java/jre/bin
[root@localhost bin]# java -version
java version "1.8.0_201"
Java(TM) SE Runtime Environment (build 1.8.0_201-b09)
Java HotSpot(TM) 64-Bit Server VM (build 25.201-b09, mixed mode)
安装maven
[root@localhost ~]# tar -zxf apache-maven-3.6.0-bin.tar.gz
[root@localhost ~]# mv apache-maven-3.6.0 /usr/local/maven
[root@localhost ~]# vim /etc/profile
export PATH=$PATH:/usr/local/maven/bin
[root@localhost ~]# source /etc/profile
[root@localhost ~]# mvn -v
Apache Maven 3.6.0 (97c98ec64a1fdfee7767ce5ffb20918da4f719f3; 2018-10-25T02:41:47+08:00)
Maven home: /usr/local/maven
Java version: 1.8.0_201, vendor: Oracle Corporation, runtime: /usr/local/java/jre
Default locale: zh_CN, platform encoding: UTF-8
OS name: "linux", version: "3.10.0-514.el7.x86_64", arch: "amd64", family: "unix"
安装consul服务（四台都要安）
[root@localhost ~]# unzip consul_1.4.0_linux_amd64.zip -d /usr/bin/
Archive: consul_1.4.0_linux_amd64.zip
inflating: /usr/bin/consul
[root@localhost ~]# mkdir -p /opt/consul/{data,config,logs}
参数释义：
data：存放数据的目录
config：存放配置信息的目录
logs：存放日志
consul没有配置文件，所以直接通过启动命令来配置称为集群
consul-1
[root@localhost ~]# systemctl stop firewalld
[root@localhost ~]# setenforce 0
[root@localhost ~]# consul agent -server -node=consul1 -data-dir /opt/consul/data/ -config-dir /opt/consul/config/ -bind 192.168.10.20 -client 0.0.0.0 -enable-script-checks=true -datacenter=kgc -bootstrap-expect=2
参数释义：
consul 命令
agent 启动一个代理
-server 以服务端启动
-node=consul1 当前节点在集群中名称
-data-dir /opt/consul/data/ 数据文件的目录
-config-dir /opt/consul/config/ 配置文件的目录
-bind 192.168.2.10 监听的ip
-client 0.0.0.0 指定的客户端 代表所有的客户端
-enable-script-checks=true 开启心跳连接
-datacenter=kgc 数据中心的名称
-bootstrap-expect=2 至少两个节点形成集群
consul-2
[root@localhost ~]# systemctl stop firewalld
[root@localhost ~]# setenforce 0
[root@localhost ~]# consul agent -server -ui -node=consul2 -data-dir /opt/consul/data/ -config-dir /opt/consul/config/ -bind 192.168.10.30 -client 0.0.0.0 -enable-script-checks=true -datacenter=kgc -join 192.168.10.20
参数释义：
-ui ：图形化界面
-join：加入集群
consul-3
[root@localhost ~]# systemctl stop firewalld
[root@localhost ~]# setenforce 0
[root@localhost ~]# consul agent -server -ui -node=consul3 -data-dir /opt/consul/data/ -config-dir /opt/consul/config/ -bind 192.168.10.40 -client 0.0.0.0 -enable-script-checks=true -datacenter=kgc -join 192.168.10.20
client客户端
[root@localhost ~]# systemctl stop firewalld
[root@localhost ~]# setenforce 0
[root@localhost ~]# consul agent -node=client -data-dir /opt/consul/data/ -config-dir /opt/consul/config/ -bind 192.168.10.10 -client 0.0.0.0 -enable-script-checks=true -datacenter=kgc -join 192.168.10.20
执行完后所有的主机都会阻塞终端，可以在第一台consul主机上另开一个终端去查看一下集群是否构建成功
[root@localhost ~]# consul members
Node Address Status Type Build Protocol DC Segment
consul1 192.168.10.20:8301 alive server 1.4.0 2 kgc <all>
consul2 192.168.10.30:8301 alive server 1.4.0 2 kgc <all>
consul3 192.168.10.40:8301 alive server 1.4.0 2 kgc <all>
client 192.168.10.10:8301 alive client 1.4.0 2 kgc <default>
[root@localhost ~]# curl http://192.168.10.20:8500/v1/status/leader
"192.168.10.20:8300"
[root@localhost ~]# curl http://192.168.10.20:8500/v1/status/peers
["192.168.10.20:8300","192.168.10.30:8300","192.168.10.40:8300"]
[root@localhost ~]# consul info #查看集群的信息
agent:
check_monitors = 0
check_ttls = 0
checks = 0
services = 0
build:
prerelease =
revision = 0bddfa23
version = 1.4.0
consul:
acl = disabled
bootstrap = false
known_datacenters = 1
leader = true
leader_addr = 192.168.10.20:8300
server = true
……………………
[root@localhost ~]# curl http://192.168.10.20:8500/v1/catalog/nodes?pretty #查看所有的节点，并且转换为json格式
[
{
"ID": "e280d23d-58b1-72b4-1c93-5a240f0ee1cd",
"Node": "client",
"Address": "192.168.10.10",
"Datacenter": "kgc",
"TaggedAddresses": {
"lan": "192.168.10.10",
"wan": "192.168.10.10"
},
"Meta": {
"consul-network-segment": ""
},
"CreateIndex": 23,
"ModifyIndex": 24
},
………………
访问第二台consul-2的ip和端口（因为第一台是没有图形化界面的，只有第二台和第三台有，所以这儿我们可以去访问验证查看一下）
consul的基础命令
nosql 存储数据 添加数据
1、创建或者更新数据
[root@localhost ~]# consul kv put redis/config/one 1 #添加数据到集群
Success! Data written to: redis/config/one
[root@localhost ~]# consul kv get redis/config/one #查看
1
2、获取值
[root@localhost ~]# consul kv get -detailed redis/config/one
CreateIndex 379
Flags 0
Key redis/config/one
LockIndex 0
ModifyIndex 379
Session -
Value 1
3、查看详情
[root@localhost ~]# consul kv get -detailed redis/config/one
CreateIndex 379
Flags 0
Key redis/config/one
LockIndex 0
ModifyIndex 379
Session -
Value 1
4、删除
[root@localhost ~]# consul kv delete redis/config/one #删除
Success! Deleted key: redis/config/one
[root@localhost ~]# consul kv get redis/config/one
Error! No key exists at: redis/config/one
5、递归删除
[root@localhost ~]# consul kv put redis/config/one 1
Success! Data written to: redis/config/one
[root@localhost ~]# consul kv put redis/config/two 2
Success! Data written to: redis/config/two
[root@localhost ~]# consul kv delete -recurse redis
Success! Deleted keys with prefix: redis
[root@localhost ~]# consul kv get redis/two
Error! No key exists at: redis/two
6、列出指定前缀的内容
[root@localhost ~]# consul kv put redis/config/one 1
Success! Data written to: redis/config/one
[root@localhost ~]# consul kv put redis/config/two 2
Success! Data written to: redis/config/two
[root@localhost ~]# consul kv get -keys redis/config/
redis/config/one
redis/config/two
7、列出所有的键
[root@localhost ~]# consul kv get -keys
redis/
consul作为注册中心的功能
consul-1、consul-2、client客户端
注：另开终端执行
root@localhost ~]# git clone https://github.com/luojunyong/spring-cloud-examples.git
正克隆到 'spring-cloud-examples'...
remote: Enumerating objects: 700, done.
remote: Total 700 (delta 0), reused 0 (delta 0), pack-reused 700
接收对象中: 100% (700/700), 66.07 KiB | 0 bytes/s, done.
处理 delta 中: 100% (216/216), done.
consul-1 生产者
[root@localhost ~]# cd /root/spring-cloud-examples/spring-cloud-consul/spring-cloud-consul-producer
[root@localhost spring-cloud-consul-producer]# vim src/main/resources/application.properties
3 spring.cloud.consul.host=192.168.10.40 #这儿写的是第三台consul-3的ip（也就是没有安装maven的那台主机）
[root@localhost spring-cloud-consul-producer]# source /etc/profile
[root@localhost spring-cloud-consul-producer]# mvn spring-boot:run
consul-2 生产者
[root@localhost ~]# cd /root/spring-cloud-examples/spring-cloud-consul/spring-cloud-consul-producer-2/
[root@localhost spring-cloud-consul-producer-2]# vim src/main/resources/application.properties
3 spring.cloud.consul.host=192.168.10.40
[root@localhost spring-cloud-consul-producer-2]# source /etc/profile
[root@localhost spring-cloud-consul-producer-2]# mvn spring-boot:run
client 消费者
[root@localhost ~]# cd /root/spring-cloud-examples/spring-cloud-consul/spring-cloud-consul-consumer/
[root@localhost spring-cloud-consul-consumer]# vim src/main/resources/application.properties
spring.cloud.consul.host=192.168.10.40
[root@localhost spring-cloud-consul-consumer]# source /etc/profile
[root@localhost spring-cloud-consul-consumer]# mvn spring-boot:run
第四台client另开一个终端去访问
[root@localhost ~]# curl 192.168.10.10:8503/call
helle consul
[root@localhost ~]# curl 192.168.10.10:8503/call
helle consul two
再次去图形化界面查看验证
posted on 2021-01-24 12:24 1763392456 阅读(313) 评论(0) 编辑 收藏 举报
