Nginx环境搭建

Nginx

一. 安装部署nginx(单机版)

1.上传nginx安装包
2.解压nginx
[ ] tar -zxvf nginx-1.12.2.tar.gz -C /usr/local/src/
3.进入到nginx的源码目录
[ ] cd /usr/local/src/nginx-1.12.2/
4.预编译
[ ] ./configure
5.安装gcc编译器
[ ] yum -y install gcc pcre-devel openssl openssl-devel
6.然后再执行
[ ] ./configure
7.编译安装nginx(默认安装在/usr/local/nginx位置)
[ ] make && make install
8.启动nginx
[ ] cd /usr/local/nginx
启动: sbin/nginx
帮助: sbin/nginx -h
重新加载: sbin/nginx -s reload
9.查看nginx进程
[ ] ps -ef | grep nginx
[ ] netstat -anpt | grep nginx
10.web访问192.168.1.191查看是否启动成功
将springboot程序部署在多台服务器上，然后启动springboot
[ ] java -jar niubike-0.0.1-SNAPSHOT.war >> ./logs 2>&1 &

11.修改nginx的配置文件，让nginx实现负载均衡功能
[ ] vi /usr/local/nginx/conf/nginx.conf

nginx.conf中需要修改的部分:

 http {
    include       mime.types;
    default_type  application/octet-stream;
    sendfile        on;
    keepalive_timeout  65;
    #gzip  on;

    #响应数据的来源
    upstream tomcats { 
        server node6:8888 weight=1;
        server node7:8888 weight=1;
        server node8:8888 weight=1;
    }
    server {
        listen       80;
        server_name  node-5.xiaoniu.com;
        location ~ .* {
    	    proxy_pass http://tomcats;
	    }
    }
}

二.keepalived实现高可靠（HA）

HA(High Available), 高可用性集群，是保证业务连续性的有效解决方案，一般有两个或两个以上的节点，且分为活动节点及备用节点。

高可靠软件keepalived
keepalive是一款可以实现高可靠的软件，通常部署在2台服务器上，分为一主一备。Keepalived可以对本机上的进程进行检测，一旦Master检测出某个进程出现问题，将自己切换成Backup状态，然后通知另外一个节点切换成Master状态。

keepalived安装

#下载:keepalived官网
#将keepalived解压到/usr/local/src目录下
[ ] tar -zxvf keepalived-1.3.6.tar.gz -C /usr/local/src
#进入到/usr/local/src/keepalived-1.3.6目录
[ ] cd /usr/local/src/keepalived-1.3.6
#开始configure
[ ] ./configure
#编译并安装
[ ] make && make install
–将keepalived添加到系统服务中
#拷贝执行文件
[ ] cp /usr/local/sbin/keepalived /usr/sbin/
#将init.d文件拷贝到etc下,加入开机启动项
[ ] cp /usr/local/src/keepalived-1.3.6/keepalived/etc/init.d/keepalived /etc/init.d/keepalived
#将keepalived文件拷贝到etc下
[ ] cp /usr/local/src/keepalived-1.3.6/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
#创建keepalived文件夹
[ ] mkdir -p /etc/keepalived
#将keepalived配置文件拷贝到etc下
[ ] cp /usr/local/src/keepalived-1.3.6/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf
#添加可执行权限
[ ] chmod +x /etc/init.d/keepalived
#添加keepalived到开机启动
[ ] chkconfig --add keepalived
[ ] chkconfig keepalived on
–配置keepalived虚拟IP

#MASTER节点
global_defs {
}
vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        10.0.0.10/24
    }
}
#BACKUP节点
global_defs {
}
vrrp_instance VI_1 {
    state BACKUP
    interface eth0
    virtual_router_id 51
    priority 99
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        10.0.0.10/24
    }
}

#分别启动两台机器上的keepalived
[ ] service keepalived start
–配置keepalived心跳检查

#MASTER节点
global_defs {
}

vrrp_script chk_health {
    script "[[ `ps -ef | grep nginx | grep -v grep | wc -l` -ge 2 ]] && exit 0 || exit 1"
    interval 1
    weight -2
}

vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 1
    priority 100
    advert_int 2
    authentication {
        auth_type PASS
        auth_pass 1111
    }

    track_script {
        chk_health
    }

    virtual_ipaddress {
        10.0.0.10/24
    }
    notify_master "/usr/local/keepalived/sbin/notify.sh master"
    notify_backup "/usr/local/keepalived/sbin/notify.sh backup"
    notify_fault "/usr/local/keepalived/sbin/notify.sh fault"
}
#添加切换通知脚本
vi /usr/local/keepalived/sbin/notify.sh
#!/bin/bash
case "$1" in
    master)
        /usr/local/nginx/sbin/nginx
        exit 0
    ;;
backup)
        /usr/local/nginx/sbin/nginx -s stop
        /usr/local/nginx/sbin/nginx
        exit 0
    ;;
    fault)
        /usr/local/nginx/sbin/nginx -s stop
        exit 0
    ;;
    *)
        echo 'Usage: notify.sh {master|backup|fault}'
        exit 1
    ;;
esac
#添加执行权限
chmod +x /usr/local/keepalived/sbin/notify.sh
global_defs {
}

vrrp_script chk_health {
    script "[[ `ps -ef | grep nginx | grep -v grep | wc -l` -ge 2 ]] && exit 0 || exit 1"
    interval 1
    weight -2
}

vrrp_instance VI_1 {
    state BACKUP
    interface eth0
    virtual_router_id 1
    priority 99
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }

    track_script {
        chk_health
    }

    virtual_ipaddress {
        10.0.0.10/24
    }
	
    notify_master "/usr/local/keepalived/sbin/notify.sh master"
    notify_backup "/usr/local/keepalived/sbin/notify.sh backup"
    notify_fault "/usr/local/keepalived/sbin/notify.sh fault"
}

#在第二台机器上添加notify.sh脚本
#分别在两台机器上启动keepalived
[ ] service keepalived start
[ ] chkconfig keepalived on

三. nginx整合kafka

0.1.上传nginx安装包
0.2.解压nginx
[ ] tar -zxvf nginx-1.12.2.tar.gz -C /usr/local/src/
1.安装git
[ ] yum install -y git
2.切换到/usr/local/src目录，然后将kafka的c客户端源码clone到本地(可直接访问连接下载librdkafka-master.zip)
[ ] cd /usr/local/src
[ ] git clone https://github.com/edenhill/librdkafka
3.进入到librdkafka，然后进行编译
[ ] cd librdkafka
[ ] yum install -y gcc gcc-c++ pcre-devel zlib-devel
[ ] ./configure
[ ] make && make install

4.安装nginx整合kafka的插件，进入到/usr/local/src，clone nginx整合kafka的源码(可直接访问连接下载ngx_kafka_module.zip)
[ ] cd /usr/local/src
[ ] git clone https://github.com/brg-liuwei/ngx_kafka_module

5.进入到nginx的源码包目录下 （编译nginx，然后将将插件同时编译）
[ ] cd /usr/local/src/nginx-1.12.2
[ ] ./configure --add-module=/usr/local/src/ngx_kafka_module/
[ ] make
[ ] make install

6.修改nginx的配置文件，详情请查看当前目录的nginx.conf
[ ] vi /usr/local/nginx/conf/nginx.conf

重要部分:

http {
    include       mime.types;
    default_type  application/octet-stream;   
    sendfile        on;
    keepalive_timeout  65;
    #gzip  on;
    kafka;
    kafka_broker_list node6:9092 node7:9092 node8:9092; 	   
    server {
        listen       80;
        server_name  node-6.xiaoniu.com;
        #charset koi8-r;
        #access_log  logs/host.access.log  main;
备注:向/kafka/track该路径下写入信息,nginx会将写入的信息写到kafka的track topic下	
    	location = /kafka/track {
                kafka_topic track;
        }

    	location = /kafka/user {
                kafka_topic user;
        }
	location = /kafka/record{
                kafka_topic record;
        }

        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html; }}}

7.启动zk和kafka集群(创建topic)
[ ] /root/hadoop/zookeeper-3.4.6/bin/zkServer.sh start
[ ] /root/hadoop/kafka_2.11-0.10.2.1/bin/kafka-server-start.sh -daemon /root/hadoop/kafka_2.11-0.10.2.1/config/server.properties

8.启动nginx，报错，找不到kafka.so.1的文件
[ ] error while loading shared libraries: librdkafka.so.1: cannot open shared object file: No such file or directory
9.加载so库
[ ] echo “/usr/local/lib” >> /etc/ld.so.conf
[ ] ldconfig
10.测试，向nginx中写入数据，然后观察kafka的消费者能不能消费到数据
[ ] curl localhost/kafka/track -d “message send to kafka topic”
[ ] curl localhost/kafka/track -d “老赵666”
11.出现的问题:
启动报错,80端口被占用
[ ] nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
解决:
[ ] killall -9 nginx
[ ] /usr/local/nginx/sbin/nginx

最后

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