• 华为云:实现高可用的负载均衡web集群


    华为云:

      2台云主机做负载均衡调度

        》》申请一个虚拟浮动ip,并绑定一个弹性公网ip

        》》将两台云主机绑定到虚拟浮动ip上

      3台web服务器

      1台云服务器做jumpserver(跳板机,用于批量管理)

      

      #购买增强型负载均衡器(配置监听器、后端服务器组)

    跳板机

      下载nginx源码包并打包成rpm,更新自建yum仓库

        > 安装rpm-build            

    [root@jumpserver ~]# yum -y install rpm-build

        > 生成rpmbuild目录结构

    [root@jumpserver ~]# rpmbuild -ba nginx.spec

        > 下载源码到rpmbuild目录下的SOURCES子目录下

    [root@jumpserver ~]# wget http://nginx.org/download/nginx-1.12.2.tar.gz
    [root@jumpserver ~]# mv /root/nginx-1.12.2.tar.gz /root/rpmbuild/SOURCES/

        > 创建并修改SPEC配置文件

    name: nginx    
    Version: 1.12.2      
    Release: 10
    Summary: Nginx is a web server software.    
    
    #Group:        
    License: GRL    
    URL: www.cloud.com
    Source0: nginx-1.12.2.tar.gz    
    
    #BuildRequires:    
    #Requires:    
    
    %description
    this is a nginx...
    
    %post
    useradd nginx
    
    %prep
    %setup -q
    
    
    %build
    ./configure --prefix=/usr/local/nginx --user=nginx --group=nginx --with-http_ssl_module
    make %{?_smp_mflags}
    
    
    %install
    make install DESTDIR=%{buildroot}
    
    
    %files
    %doc
    /usr/local/nginx/*
    
    
    
    %changelog
    View Code

        >  使用配置文件创建RPM包

     [root@jumpserver ~]# yum -y install gcc pcre-devel openssl-devel            # 安装依赖

    [root@jumpserver ~]#  rpmbuild -ba /root/rpmbuild/SPECS/nginx.spec

     [root@jumpserver ~]# rpm -qpi /root/rpmbuild/RPMS/x86_64/nginx-1.12.2-10.x86_64.rpm         # 测试

        > 将rpm包拷贝到自建的yum 仓库下并更新yum源

    [root@jumpserver ~]# cp /root/rpmbuild/RPMS/x86_64/nginx-1.12.2-10.x86_64.rpm /var/ftp/local_repo/
    [root@jumpserver local_repo]# createrepo --update .

        > 批量安装nginx

    [root@jumpserver ~]# ansible web -m yum -a 'name=nginx'

        > 配置/etc/systemd/system/nginx.service,使nginx支持systemctl控制,并批量下发到所有主机

    [Unit]
    Description=nginx
    Documentation=http://nginx.org/en/docs/
    After=network.target remote-fs.target nss-lookup.target
    
    [Service]
    Type=forking
    PIDFile=/usr/local/nginx/logs/nginx.pid
    ExecStartPre=-/usr/local/nginx/sbin/nginx -t -c /usr/local/nginx/conf/nginx.conf
    ExecStart=/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
    ExecReload=/usr/local/nginx/sbin/nginx -s reload
    ExecStio=/usr/local/nginx/sbin/nginx -s quit
    PrivateTmp=true
    
    [Install]
    WantedBy=multi-user.target
    View Code
    [root@jumpserver ~]# ansible web -m copy -a 'src=/root/nginx.service dest=/etc/systemd/system/nginx.service'

        > 批量启动nginx服务

    [root@jumpserver ~]#  ansible web -m service  -a 'name=nginx state=started enabled=yes'
    [root@jumpserver ~]#  ansible web -m shell  -a 'ss -ltnup | grep *:80'

    调度器(2台)

      >  安装 keepalived

    yum -y install keepalived

      > 修改配置文件 vim /etc/keepalived/keepalived.conf

    ! Configuration File for keepalived
    
    global_defs {
       notification_email {
         root@localhost
       }
       notification_email_from root@localhost
       smtp_server 127.0.0.1
       smtp_connect_timeout 30
       router_id web-0001
    }
    
    vrrp_instance VI_1 {
        state BACKUP               # 另外一台配置为MASTER
        interface eth0
        virtual_router_id 50      # 两台调度器的值相同
        priority 50                        # 优先级,设置不同值
        advert_int 1
        authentication {
            auth_type PASS
            auth_pass 1111        # 密码 必须相同
        }
        virtual_ipaddress {
            192.168.1.100                           # vip 
        }
    }

      > 重启服务

    systemctl restart keepalived

      > 配置nginx调度  vim /usr/local/nginx/conf/nginx.conf

    http {
    ...
        # web集群
        upstream webserver {
                    server 192.168.1.13:80;
                    server 192.168.1.14:80;
                    server 192.168.1.15:80;
            }
    
    
        server {
            listen       80;
            server_name  localhost;
                location / {
                proxy_pass http://webserver;
            }
    
    ...
    }

    web集群

      > 配置 vim /usr/local/nginx/conf/nginx.conf     #  ansible  批量部署 nginx配置文件,方便排错


    server { listen 80;
        server_name localhost;
      add_header 'Cluster- id ' {{ansible_hostname}}';
        location / 
          {
            proxy_pass http://webserver;
          }
      }
    
    
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  • 原文地址:https://www.cnblogs.com/ray-mmss/p/10479131.html
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