Kong网关的负载均衡

安装java环境

查询 java安装包
196  yum list java*
安装java8
  197  yum install -y java-1.8.0-openjdk.x86_64
检验java8是否安装成功。
  198  java -version

2个tomcat准备

另外一个tomcat区别在于：配置文件。conf/server.xml

启动tomcat

[root@localhost bin]# ./startup.sh

测试tomcat

[root@localhost bin]# curl http://localhost:8081/test/index.html
tomcat-8081,81,81
[root@localhost bin]# curl http://localhost:8082/test/index.html
tomcat-8082,82,82
[root@localhost bin]#

nginx安装：

目录：/etc/yum.repos.d/


241  vi nginx.repo

文件内容：
[root@192 yum.repos.d]# cat nginx.repo 
[nginx-stable]
name=nginx stable repo
baseurl=http://nginx.org/packages/centos/$releasever/$basearch/
gpgcheck=1
enabled=1
gpgkey=https://nginx.org/keys/nginx_signing.key
module_hotfixes=true

[nginx-mainline]
name=nginx mainline repo
baseurl=http://nginx.org/packages/mainline/centos/$releasever/$basearch/
gpgcheck=1
enabled=0
gpgkey=https://nginx.org/keys/nginx_signing.key
module_hotfixes=true
[root@192 yum.repos.d]#

239  cd /etc/yum.repos.d/
  240  ll
  安装nginx：
  242  yum install nginx
  243  nginx -v
  244  ps -ef | grep nginx
  245  cd /usr/sbin/
  246  ll
  247  ./nginx
  248  ps -ef | grep nginx
测试nginx
  249  curl http://localhost

nginx做负载均衡

修改/etc/nginx/nginx.conf

/test/index.html[root@192 nginx]# cat nginx.conf 

user  nginx;
worker_processes  auto;

error_log  /var/log/nginx/error.log notice;
pid        /var/run/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    keepalive_timeout  65;

    #gzip  on;

    include /etc/nginx/conf.d/*.conf;


# diy
    upstream myServer {
        server localhost:8081;
	server localhost:8082;
    }

    server {
	listen 80;
	server_name myNginx.com;
	location /test/ {
	    proxy_pass http://myServer;
	}
    }
}
[root@192 nginx]#

重新加载配置文件

启动nginx:/usr/sbin/nginx
[root@192 nginx]# /usr/sbin/nginx -s reload

域名：

myNginx.com

配置linux域名：

配置宿主机域名：

kong负载均衡

先看nginx

# diy
    upstream myServer {
        server localhost:8081;
	server localhost:8082;
    }

    server {
	listen 80;
	server_name myNginx.com;
	location /test/ {
	    proxy_pass http://myServer;
	}
    }

kong:

upstream

查看：http://127.0.0.1:8001/upstreams。

添加：

[root@localhost etc]# curl -X POST http://localhost:8001/upstreams --data "name=myServer"

{"client_certificate":null,"hash_on":"none","id":"933c3aab-85da-4dc1-a34f-2fae01b56b48","hash_on_header":null,"algorithm":"round-robin","hash_on_query_arg":null,"hash_on_uri_capture":null,"healthchecks":{"passive":{"type":"http","healthy":{"http_statuses":[200,201,202,203,204,205,206,207,208,226,300,301,302,303,304,305,306,307,308],"successes":0},"unhealthy":{"tcp_failures":0,"timeouts":0,"http_failures":0,"http_statuses":[429,500,503]}},"active":{"headers":null,"http_path":"/","https_sni":null,"https_verify_certificate":true,"concurrency":10,"unhealthy":{"tcp_failures":0,"timeouts":0,"http_failures":0,"http_statuses":[429,404,500,501,502,503,504,505],"interval":0},"timeout":1,"type":"http","healthy":{"successes":0,"http_statuses":[200,302],"interval":0}},"threshold":0},"hash_on_cookie":null,"hash_on_cookie_path":"/","hash_fallback":"none","hash_fallback_header":null,"hash_fallback_query_arg":null,"hash_fallback_uri_capture":null,"host_header":null,"tags":null,"created_at":1669830017,"name":"myServer","slots":10000}[root@localhost etc]#

再检查一下，做确认。

Target

查询：http://127.0.0.1:8001/upstreams/myServer/targets

添加：

[root@localhost etc]# curl -X POST http://localhost:8001/upstreams/myServer/targets --data "target=10.0.2.4:8081"

{"upstream":{"id":"933c3aab-85da-4dc1-a34f-2fae01b56b48"},"tags":null,"id":"499d1373-45fc-44b5-b952-1e590f3be680","weight":100,"created_at":1669830273.544,"target":"10.0.2.4:8081"}[root@localhost etc]# curl -X POST http://localhost:8001/upstreams/myServer/targets --data "target=10.0.2.4:8082"
{"upstream":{"id":"933c3aab-85da-4dc1-a34f-2fae01b56b48"},"tags":null,"id":"093cc5cf-ac84-4bb9-b0c7-0289fec7da6a","weight":100,"created_at":1669830307.884,"target":"10.0.2.4:8082"}[root@localhost etc]#

添加完，查看一下。

Service

查看service：http://127.0.0.1:8001/services

添加：

[root@localhost etc]# curl -X POST http://localhost:8001/services --data "name=myService" --data "host=myServer"

{"client_certificate":null,"tls_verify_depth":null,"id":"a5997d4d-c868-43fe-8a73-9db62c5410f8","created_at":1669830610,"updated_at":1669830610,"read_timeout":60000,"protocol":"http","host":"myServer","name":"myService","enabled":true,"retries":5,"port":80,"write_timeout":60000,"tags":null,"ca_certificates":null,"connect_timeout":60000,"tls_verify":null,"path":null}[root@localhost etc]#

查看：http://127.0.0.1:8001/services

Route

查看route：http://127.0.0.1:8001/services/myService/routes

添加：

[root@localhost etc]# curl -X POST http://localhost:8001/services/myService/routes --data "name=myRoute" --data "paths[]=/test"

{"paths":["/test"],"methods":null,"sources":null,"destinations":null,"id":"231fc5ba-a1f1-4d6f-9fcb-eac4e897923d","created_at":1669830883,"updated_at":1669830883,"service":{"id":"a5997d4d-c868-43fe-8a73-9db62c5410f8"},"https_redirect_status_code":426,"regex_priority":0,"protocols":["http","https"],"path_handling":"v0","name":"myRoute","strip_path":true,"snis":null,"hosts":null,"tags":null,"headers":null,"request_buffering":true,"response_buffering":true,"preserve_host":false}[root@localhost etc]#

测试负载均衡：

[root@localhost etc]# curl http://localhost:8000/test/test/index.html
tomcat-8082,82,82
[root@localhost etc]# curl http://localhost:8000/test/test/index.html
tomcat-8081,81,81
[root@localhost etc]# curl http://localhost:8000/test/test/index.html
tomcat-8082,82,82
[root@localhost etc]# curl http://localhost:8000/test/test/index.html
tomcat-8081,81,81
[root@localhost etc]# curl http://localhost:8000/test/test/index.html
tomcat-8082,82,82
[root@localhost etc]# curl http://localhost:8000/test/test/index.html
tomcat-8081,81,81
[root@localhost etc]#

成功。

请求需要两个test的原因。

加了/。 相当于匹配到目标地址的 根路径。

# diy
    upstream myServer {
        server localhost:8081;
	server localhost:8082;
    }

    server {
	listen 80;
	server_name myNginx.com;
	location /test/ {
	    proxy_pass http://myServer/;
	}
    }

总结：

upstream: 对应一组 target节点，实现负载均衡。（还可以指定权重）

target: 对应的具体的服务url。controller。

route: 负责将请求，匹配，映射到 upstream。

service: 将服务节点，指定到一个upstream（具体的服务）。

upstream

----target

service

----route

---

操作方面：

添加 POST, 修改：PATCH, 删除：DELETE, 查：GET

service:url

创建：
 175  curl -X POST http://localhost:8001/services --data name=myTomcat --data url=http://10.0.2.4:8081/test/index.html
查看
  176  curl -X GET http://localhost:8001/services
删除
  177  curl -X DELETE http://localhost:8001/services/myTomcat
查看
  178  curl -X GET http://localhost:8001/services

 更新：
  180  curl -X PATCH http://localhost:8001/services/myTomcat --data url=http://10.0.2.4:8082/test/index.html
  181  curl -X POST http://localhost:8001/services/myTomcat/routes --data name=8082Route --data 'paths[]=/tomcat82'