varnish安装配置

wedsddsa

1，Varnish的安装        1，操作系统：redhat  or  centos
        2，依赖关系：     

• 
  
  
  • autoconf
  • automake
  • jemalloc-devel
  • libedit-devel
  • libtool
  • ncurses-devel
  • pcre-devel
  • pkgconfig
  • python-docutils
  • python-sphinx
    
    

        2，安装varnish（这里使用yum安装）以及后端服务器。
            添加varnish的源（epel-release源）
            yum install epel-release
            rpm --nosignature -i https://repo.varnish-cache.org/redhat/varnish-4.0.el6.rpm（注意，centos 6版本的系统最好安装varnishi4.0的版本，如果安装4.1的版本的话，会提示lib库版本较低，要手动编译安装相关依赖条件 ）
            yum -y install varnish nginx
        3，启动varnish
            首先我们来看下，安装完成varnish之后为我们提供了那些命令
            varnishadm：命令行管理varnish命令
            varnishd：启动varnish的命令
            varnishlog：查看varnishlog的
            varnishncsa：查看varnish的accesslog
            varnishstat：查看varnish状态。
            这些是常用的一些命令，具体的使用方法可以man帮助看下。
            varnish的配置文件在/etc/varnish/default.vcl，我们可以打开来看下,开始我们就是用默认的配置文件，后面会对相关的配置文件进行学习说明。首先我们是要保证其正确运行起来。

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# # This is an example VCL file for Varnish. # # It does not do anything by default, delegating control to the # builtin VCL. The builtin VCL is called when there is no explicit # return statement. # # See the VCL chapters in the Users Guide at https://www.varnish-cache.org/docs/ # and http://varnish-cache.org/trac/wiki/VCLExamples for more examples. # Marker to tell the VCL compiler that this VCL has been adapted to the # new 4.0 format. vcl 4.0; # Default backend definition. Set this to point to your content server. #后端的真实服务器 backend default {     .host = "127.0.0.1";     .port = "80"; } sub vcl_recv {     # Happens before we check if we have this in cache already.     #        # Typically you clean up the request here, removing cookies you don't need,     # rewriting the request, etc. } sub vcl_backend_response {     # Happens after we have read the response headers from the backend.     #        # Here you clean the response headers, removing silly Set-Cookie headers     # and other mistakes your backend does. } sub vcl_deliver {     # Happens when we have all the pieces we need, and are about to send the     # response to the client.     #        # You can do accounting or modifying the final object here.

}
            varnish的启动脚本在/etc/rc.d/init.d/varnish,varnish的启动参数配置在/etc/sysconfig/varnish.看下启动参数配置：

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RELOAD_VCL=1 #是否自动加载vcl配置文件 VARNISH_VCL_CONF=/etc/varnish/default.vcl  #配置文件的位置 VARNISH_LISTEN_PORT=6081#varnish的监听端口，对外提供服务的端口 VARNISH_ADMIN_LISTEN_ADDRESS=127.0.0.1#管理地址             VARNISH_ADMIN_LISTEN_PORT=6082#管理端口 VARNISH_SECRET_FILE=/etc/varnish/secret  #安全密钥文件 # The minimum number of worker threads to start VARNISH_MIN_THREADS=50 # The Maximum number of worker threads to start VARNISH_MAX_THREADS=1000 # Cache file size: in bytes, optionally using k / M / G / T suffix. VARNISH_STORAGE_SIZE=256M # Backend storage specification VARNISH_STORAGE="malloc,${VARNISH_STORAGE_SIZE}" # Default TTL used when the backend does not specify one VARNISH_TTL=120 # DAEMON_OPTS is used by the init script.启动varnish应用的时候使用的参数 DAEMON_OPTS="-a ${VARNISH_LISTEN_ADDRESS}:${VARNISH_LISTEN_PORT} \         -f ${VARNISH_VCL_CONF} \        -T ${VARNISH_ADMIN_LISTEN_ADDRESS}:${VARNISH_ADMIN_LISTEN_PORT} \        -p thread_pool_min=${VARNISH_MIN_THREADS} \                    -p thread_pool_max=${VARNISH_MAX_THREADS} \                 -u root -g root \                    -S ${VARNISH_SECRET_FILE} \                    -s ${VARNISH_STORAGE}"

    service varnish  start  

    到此，我们就启动了varnish。可以使用相关命令查看下其进程等等。