haproxy architecture

Issue background:Before our company due to DDoS attacks caused by network exports, after understanding, traffic into the Amazon is no money, and unlimited traffic, in order to strengthen the protection of network attacks on the business impact, in the Amazon to deploy a set of Haproxy agent, the part of the business migration trial.650) this.width=650; "Src=" Http://s4.51cto.com/wyfs02/M01/83/1F/wKioL1drZeyxEL5mAAA1K9OBwBc668.png-wh_500x0-wm_3 -wmp_4-

Haproxy implements reverse proxy and load balancingReverse Proxy Server features: web Cache (acceleration), reverse proxy, content routing (forwarding requests to specific servers based on traffic and content types), Transcoder cache: reducing redundant content transmission; reduces bandwidth and network bottlenecks, reduces request pressure on the original server, and reduces transmission latency. Public cache can be used by everyone, for private cac

First, Haproxy configuration introduction: Configuration file:/usr/local/haproxy/etc/haproxy.cfg Balance Roundrobin # Load Balancing algorithm configuration Second, Haproxy load Balancing algorithm Introduction: Balance Roundrobin # Polling, soft load balancing basically has this algorithm Balance STATIC-RR # Based on weights, it is recomm

First, Haproxy configuration introduction: Configuration file:/usr/local/haproxy/etc/haproxy.cfg Balance Roundrobin # Load Balancing algorithm configuration Second, Haproxy load Balancing algorithm Introduction: Balance Roundrobin # Polling, soft load balancing basically has this algorithm Balance STATIC-RR # Based on weights, it is recomm

App Gateway on Azure is a seven-tier load balancing service, and WAF is an extension of App Gateway services. The seven-tier load balancer adds the functionality of the WAF to protect the HTTP service in the background.Azure WAF is based on the WAF functionality implemented by the open source modsecurity owasp core rule sets. Please refer to Modsecurity's website for details: https://modsecurity.org/The current version of Azure support for owasp CRS has 3.0 and 2.2.92 versions. You can also enab

Haproxy The log is not logged by default, and the configuration file for the system log is required, in addition to specifying the output of the log in the global segment in haproxy.conf. Take centos6.4 as an example, Haproxy uses the system's own RPM newspaper version 1.4 1, vim/etc/haproxy/haproxy.conf GlobalLog 127.0.0.1 Local3 #local3是设备, corresponding to t

HAproxy+++++++++++++info+++++++++++vip:192.168.1.222Ha-master ip:192.168.1.117Ha-backup ip:192.168.1.118realserver1ip:192.168.1.120realserver2ip:192.168.1.121Service Iptables StopChkconfig iptables offSetenforce 0Getenforce->permissive++++++++++++keepalived+chk_haproxy.sh+++++++++master and BACKUPGlobal_defs {router_id Lvs_devel}Vrrp_script Chk_haproxy {Script "/etc/keepalived/chk_haproxy.sh"Interval 2Weight 2}Vrrp_instance Vi_1 {State MASTER #BACKUPI

Environment preparationWeb1 192.168.0.153WEB2 192.168.0.126Haproxy 192.168.0.154We use the Yum source to install the Haproxy software here.Yum Install Haproxy-y Configuring log levels for HaproxyModify rsyslog log (vi /etc/sysconfig/rsyslog) 650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M00/5B/3A/wKioL1UCrvHRrbzLAAFo2DYeq-Q515.jpg "title=" 70$ 4vni[755q]kem5i ' {a_n.png ' alt= "wkiol1

Haproxy + keepalived for Sphinx High Availability Server Load balancer The environment is as follows: [Node3] Haproxy: 192.168.1.189 [Node4] Haproxy: 192.168.1.103 VIP: 192.168.1.222/192.168.1.223 # Apt-Get install ipvsadm # Apt-Get install linux-headers-$ ( Uname-R) # Ln-S/usr/src/linux-headers-2.6.32-33/usr/src/Linux # Wget http://www.keepalived.org/software/k

Comparison and summary of Linux Server LVS, Nginx, and HAProxy load balancers LVS features: 1. Strong anti-load capability. IP Server Load balancer technology is used only for distribution. Therefore, LVS does not generate much traffic; 2. good stability and reliability, and perfect Hot Standby solution (for example, LVS + Keepalived) 3. A wide range of applications, allowing Load Balancing for all applications; 4. Regular Expression Processing is not

network services for the moment there is no need to use.Another way to load balance is through the software: more common with LVs, Nginx, Haproxy, etc., where LVS is built on the four layer protocol above, and the other Nginx and Haproxy is based on the seven layer protocol, the following respectively aboutLVS: Achieve a high-performance, high-availability server with cluster technology and Linux operating

Install HaproxyCentos/rhel 5, bit:# RPM-UVH http://dl.fedoraproject.org/pub/epel/5/i386/epel-release-5-4.noarch.rpmCentos/rhel 5, bit:# RPM-UVH http://dl.fedoraproject.org/pub/epel/5/x86_64/epel-release-5-4.noarch.rpmCentos/rhel 6, bit:# RPM-UVH http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpmCentos/rhel 6, bit:# RPM-UVH http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpmYum-y Install Haproxy Configure Ha

Use Haproxy in production environment, often encounter haproxy false alarm "backend xxx_server has no server available!" message, and in fact,xxx_server is functioning normally. More and more recent false positives, has seriously affected the use of the server, a few months ago or google some information, have not determined the problem. So decided to spare time from the source of

1. Install the required service process first:#yum ‐y Install Haproxy keepalived2. Edit the keeoalived configuration file[[emailprotected]~]#cat/etc/keepalived/keepalived.confglobal_defs{ notification_email{keepalived }notification_email_from[emailprotected]smtp _server192.168.1.200smtp_connect_timeout30router_ id10.10.1.222}vrrp_scriptchk_haproxy{script "Killall-0haproxy" interval 1 # Monitor if Haproxy is

#---------------------------------------------------------------------# Global settings#---------------------------------------------------------------------Global # to has these messages end upinch/var/log/Haproxy.log You'll # need to: # #1) Configure Syslog to accept network log events. This is Done# by adding the'- R'Option to the Syslogd_optionsinch # /etc/sysconfig/Syslog # #2) Configure Local2 events to go to the/var/log/Haproxy.log #file. A line like the following can is added to #/

first, the experimental explanation Haproxy load Balancing scheduling at the front end for dynamic and static separation at the backend Static resource server is Nginx Dynamic content uses Nginxtomcat as an app server, integrated into a single machine, two Use two memcache servers for high-availability session caching, enabling app server downtime for sessions without interruption The above combination uses to realize the business, session, session ca

: none; "title=" 2.PNG "alt=" Wkiol1biv97i47hwaaa-rcshikk605.png "/>Realize the effect of polling**haproxy Load Balancing tomcat** [[emailprotected]haproxy]#sed ' [Emailprotected]^#.*\+\|^[[:space:]]\+#.*\[email protected]@ ' haproxy.cfggloballog 127.0.0.1local2chroot/var/lib/haproxy pidfile/var/run/haproxy.pid maxconn4000user haproxygrouphaproxy dae

Configure Haproxy1. Unzip Haproxy to D:\haproxy2. Placing haproxy.cfg FilesGlobal log 127.0.0.1 local0 maxconn daemon defaults log 127.0.0.1 local3 mode http option httplog option dontlognull option redispatch Retries 3 contimeout clitimeout 50000 srvtimeout 50000 Listen Private_ monitoring:18100 #监听端口

Introduction to ACLs:The Haproxy ACL is used to make forwarding decisions based on the header of the request packet, the content of the response message, or other environmental state information, which greatly enhances its configuration flexibility. The configuration rule is usually divided into two steps, defining an ACL first, defining a test condition, and then executing a specific action when the condition is met, such as blocking the request or f

httpd Service# yum-y Install httpdand then modify httpd under the root directory of the index.html file, modify the contents as follows:# echo "I am a web1,my IP is 192.168.108.231" >/var/www/html/index.htmlStart httpd Service# service httpd Startback end of 2 a httpd After the service configuration is finished, test it for the last httpd whether it will work correctly. If you can, continue with the steps below. 3. Configuration Haproxyin the RHEL 6.4 It 's got its own. RPM package, so here we