Impala配置HA-Nginx

Impala的高可用配置，官方的例子用的是Haproxy，考虑到nginx配置简单，使用人群广泛，再加上nginx1.9以后支持TCP的负载均衡，所以选用nginx。

nginx安装：yum install -y nginx，安装地址：192.168.101.22

Impala Daemon实例有三个：cdh-t-004,cdh-t-005,cdh-t-006

配置，编辑文件 /etc/nginx/nginx.conf：

# For more information on configuration, see:
#   * Official English Documentation: http://nginx.org/en/docs/
#   * Official Russian Documentation: http://nginx.org/ru/docs/

user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /var/run/nginx.pid;

# Load dynamic modules. See /usr/share/nginx/README.dynamic.
include /usr/share/nginx/modules/*.conf;

events {
    worker_connections  1024;
}

stream{
        upstream impalajdbc {
                hash $remote_addr consistent;
                server cdh-t-004:21050;
                server cdh-t-005:21050;
                server cdh-t-006:21050;
        }

        upstream impala {
                least_conn;
                server cdh-t-004:21000;
                server cdh-t-005:21000;
                server cdh-t-006:21000;
        }

        server {
                listen 25003;
                proxy_timeout 30s;
                proxy_pass impala;
        }

        server {
                listen 21051;
                proxy_timeout 30s;
                proxy_pass impalajdbc;
        }

}

查看nginx配置