基于Varnish 3.0.4的网站静态加速
Varnish 的一些特点：
(1)、是基于内存缓存，重启后数据将消失；
(2)、利用虚拟内存方式，I/O 性能好；
(3)、支持设置 0~60 秒内的精确缓存时间；
(4)、VCL 配置管理比较灵活；
(5)、32位机器上缓存文件大小为最大2G；
(6)、具有强大的管理功能，例如 top、stat、admin、list 等；
(7)、状态机设计巧妙，结构清晰；
(8)、利用二叉堆管理缓存文件，达到积极删除目的。
Varnish 的 Storage 方式可分为两种：
1)、Malloc 通过 malloc 获取内存；
2)、Mmap file 创建大文件，通过二分法分段映射成 1G 以内的大块。
以 Mmap file 的缓存方式启动 I/O 也会形成瓶颈，原因主要是 Varnish 缓存的数据先会刷到磁盘上，然后在一次性读到内存中，这在访问量大的时候同时也会对 I/O 造成很大的压力。Malloc 缓存方式虽然对 I/O 没有压力，因所有缓存数据都写到内存中。
Malloc 方式启动：
/usr/local/varnish/sbin/varnishd -u nobody -g nogroup -f /usr/local/varnish/etc/varnish.vcl -s malloc,4G -w 50,51200,120 -a 192.168.10:80 -T 127.0.0.1:8080
Mmap file 方式启动：
/usr/local/varnish/sbin/varnishd -u nobody -g nogroup -f /usr/local/varnish/etc/varnish.vcl -s file,/data/varnish/varnish_storage.bin,4G -w 50,51200,120 -a 192.168.10:80 -T 127.0.0.1:8080
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Varnish 进程的工作模式：
Varnish 启动或有2个进程 master(management) 进程和 child(worker) 进程。master 读入存储配置命令，进行初始化，然后 fork，监控 child。child 则分配线程进行 cache 工作，child 还会做管理线程和生成很多 worker 线程。
child 进程主线程初始化过程中，将存储大文件整个加载到内存中，如果该文件超出系统的虚拟内存，则会减少原来配置 mmap 大小，然后继续加载，这时候创建并初始化空闲存储结构体，放在存储管理的 struct 中，等待分配。
接着 Varnish 某个负责接受新 http 连接的线程开始等待用户，如果有新的 http 连接，但是这个线程只负责接收，然后唤醒等待线程池中的 work 线程，进行请求处理。
worker 线程读入 uri 后，将会查找已有的 object，命中直接返回，没有命中，则会从后端服务器中取出来，放到缓存中。如果缓存已满，会根据 LRU 算法，释放旧的 object。对于释放缓存，有一个超时线程会检测缓存中所有 object 的生命周期，如果缓存过期 (ttl)，则删除，释放相应的存储内存。
------------------------------------------------------------
Varnish Cache 的架构笔记 http://www.linuxidc.com/Linux/2013-10/91016.htm
CentOS 5.8下Varnish-2.1.5的安装配置 http://www.linuxidc.com/Linux/2013-09/89916.htm
RedHat脚本改用CentOS源更新安装Nginx、PHP 5.3、Varnish http://www.linuxidc.com/Linux/2012-07/65801.htm
利用Varnish构建Cache服务器笔记 http://www.linuxidc.com/Linux/2012-07/65234.htm
缓存服务Varnish安装配置 http://www.linuxidc.com/Linux/2012-07/65228.htm
Varnish 编译安装所需准备 http://www.linuxidc.com/Linux/2012-07/65230.htm
Linux下Varnish缓存的配置优化 http://www.linuxidc.com/Linux/2012-03/56435.htm
Varnish基础概念详解 http://www.linuxidc.com/Linux/2014-07/104535.htm
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Varnish 的优点：
(1)、Varnish 的稳定性很高，两者在完成相同负荷的工作时，Squid 服务器发生故障的几率要高于 Varnish，因为使用Squid 要经常重启；
(2)、Varnish 访问速度更快，Varnish 采用了“Visual Page Cache”技术，所有缓存数据都直接从内存读取，而 Squid 是从硬盘读取，因而 Varnish 在访问速度方面会更快；
(3)、Varnish 可以支持更多的并发连接，因为 Varnish 的 TCP 连接释放要比 Squid 快。因而在高并发连接情况下可以支持更多 TCP 连接；
(4)、Varnish 可以通过管理端口，使用正则表达式批量的清除部分缓存，而 Squid 是做不到的；
(5)、Squid 属于是单进程使用单核 CPU，但 Varnish 是通过 fork 形式打开多进程来做处理，所以是合理的使用所有核来处理相应的请求。
与传统的 Squid 相比，Varnish 也有缺点：
1)、Varnish 进程一旦 Hang、Crash 或者重启，缓存数据都会从内存中完全释放，此时所有请求都会发送到后端服务器，在高并发情况下，会给后端服务器造成很大压力；
2)、在 Varnish 使用中，如果单个 url 的请求通过 HA/F5(负载均衡)、每次请求不同的 Varnish 服务器中，被请求Varnish 服务器都会被穿透到后端，而且同样的请求会在多台服务器上缓存，也会造成 Varnish 的缓存的资源浪费，也会造成性能下降。
解决方案：
1)、综上所述在访问量很大的情况下推荐使用 Varnish 的内存缓存方式启动，而且后面需要跟多台 Squid 服务器。主要为了防止前面的 Varnish 服务被重启的情况下，前期肯定会有很多的穿透，这样 Squid 可以担当第二层 CACHE，而且也弥补了 Varnish 缓存在内存中重启都会释放的问题；
2)、这样的问题可以在负载均衡上做 url 哈希，让单个 url 请求固定请求到一台 Varnish 服务器上，可以解决该问题。
注：以上内容是在借鉴别人总结的基础上，做了一些精简、修正，并加入了一些自己的总结。
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系统环境：SUSE Linux Enterprise Server 10 SP1 (x86_64)
硬件配置：8G内存、8核CPU
1、编译安装
ftp://invisible-island.net/ncurses/ncurses-5.9.tar.gz
# tar xvzf ncurses-5.9.tar.gz
# ./configure --prefix=/usr/local
# make LAGS=-fPIC
# make LAGS=-fPIC install
http://downloads.sourceforge.net/project/pcre/pcre/8.32/pcre-8.32.tar.gz
# tar xvzf pcre-8.32.tar.gz
# cd pcre-8.32
# ./configure --prefix=/usr/local
# make
# make install
ftp://ftp.gnu.org/gnu/readline/readline-6.2.tar.gz
# tar xvzf readline-6.2.tar.gz
# ./configure --prefix=/usr/local
# make
# make install
http://repo.varnish-cache.org/source/varnish-3.0.4.tar.gz
# tar xvzf varnish-3.0.4.tar.gz
# ./configure --prefix=/usr/local/varnish
# make
# make install
2、后端WEB服务健康检测
# vim /usr/local/varnish/etc/health_check.vcl
probe backend_healthcheck {
.interval = 5s;
.timeout = 3s;
.window = 10;
.threshold = 8;
.request =
"GET /index.html HTTP/1.1"
"Host: mycheckweb.mytest.com"
"Connection: close"
"Accept-Encoding: foo/bar";
}
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3、后端WEB服务定义
# vim /usr/local/varnish/etc/hosts/10.160.22.88_8080.conf
backend WEBSRV_10_160_22_88_8080 {
.host = "10.160.22.88";
.port = "8080";
.connect_timeout = 50s;
.between_bytes_timeout = 30s;
.first_byte_timeout = 30s;
.probe = backend_healthcheck;
}
# vim /usr/local/varnish/etc/hosts/10.173.146.35_8080.conf
backend WEBSRV_10_173_146_35_8080 {
.host = "10.173.146.35";
.port = "8080";
.connect_timeout = 50s;
.between_bytes_timeout = 30s;
.first_byte_timeout = 30s;
.probe = backend_healthcheck;
}
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4、集群定义
# vim /usr/local/varnish/etc/cluster.vcl
include "/usr/local/varnish/etc/health_check.vcl";
include "/usr/local/varnish/etc/hosts/10.160.22.88_8080.conf";
include "/usr/local/varnish/etc/hosts/10.173.146.35_8080.conf";
director CLUSTER_BACKEND_SERVER round-robin {
{ .backend = WEBSRV_10_160_22_88_8080; }
{ .backend = WEBSRV_10_173_146_35_8080; }
}
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5、Varnish主配置文件
# vim /usr/local/varnish/etc/varnish.vcl
include "/usr/local/varnish/etc/cluster.vcl";
acl allow_purge_cache {
"127.0.0.1";
"10.0.0.0"/8;
"172.0.0.0"/8;
}
sub vcl_recv {
if (req.request == "PURGE") {
if (!client.ip ~ allow_purge_cache) {
error 405 "Not Allowed.";
}
return (lookup);
}
if (req.http.host ~ "^(.*).mytest.com") {
set req.backend = CLUSTER_BACKEND_SERVER;
}
## 动态资源直接抛到后端服务器
if (req.url ~ "\.(php|asp|aspx|jsp|do|ashx|shtml)($|\?)") {
return (pass);
}
## 静态资源需要去除cookie信息
if (req.request == "GET" && req.url ~ "\.(css|js|bmp|png|gif|jpg|jpeg|ico|gz|tgz|bz2|tbz|zip|rar|mp3|mp4|ogg|swf|flv)($|\?)") {
unset req.http.cookie;
return (lookup);
}
if (req.restarts == 0) {
if (req.http.x-forwarded-for) {
set req.http.X-Forwarded-For = req.http.X-Forwarded-For + ", " + client.ip;
} else {
set req.http.X-Forwarded-For = client.ip;
}
}
if (req.http.Cache-Control ~ "no-cache") {
return (pass);
}
if (req.request != "GET" &&
req.request != "HEAD" &&
req.request != "PUT" &&
req.request != "POST" &&
req.request != "TRACE" &&
req.request != "OPTIONS" &&
req.request != "DELETE") {
return (pipe);
}
if (req.request != "GET" && req.request != "HEAD") {
return (pass);
}
if (req.http.Authorization || req.http.Cookie) {
return (pass);
}
## 静态资源压缩
if (req.http.Accept-Encoding) {
if (req.url ~ "\.(bmp|png|gif|jpg|jpeg|ico|gz|tgz|bz2|tbz|zip|rar|mp3|mp4|ogg|swf|flv)$") {
remove req.http.Accept-Encoding;
} elseif (req.http.Accept-Encoding ~ "gzip") {
set req.http.Accept-Encoding = "gzip";
} elseif (req.http.Accept-Encoding ~ "deflate") {
set req.http.Accept-Encoding = "deflate";
} else {
remove req.http.Accept-Encoding;
}
}
## 防盗链设置
if (req.http.referer ~ "http://.*") {
if (!(req.http.referer ~ "http://.*\.qq\.com" ||
req.http.referer ~ "http://.*\.baidu\.com" ||
req.http.referer ~ "http://.*\.google\.com.*" ||
req.http.referer ~ "http://.*\.sogou\.com" ||
req.http.referer ~ "http://.*\.soso\.com" ||
req.http.referer ~ "http://.*\.so\.com")) {
set req.http.host = "www.mytest.com";
set req.url = "/";
}
}
if (!req.backend.healthy) {
unset req.http.Cookie;
}
## 跳过缓存大文件
if (req.http.x-pipe && req.restarts > 0) {
unset req.http.x-pipe;
return (pipe);
}
## 若backend是健康的，则仅grace 5s，如果backend不健康，则grace 1m，主要用于提高并发时的吞吐率
if (req.backend.healthy) {
set req.grace = 5s;
} else {
set req.grace = 1m;
}
}
sub vcl_pipe {
return (pipe);
}
sub vcl_pass {
if (req.request == "PURGE") {
error 502 "PURGE on a passed object";
}
}
sub vcl_hash {
hash_data(req.url);
if (req.http.host) {
hash_data(req.http.host);
} else {
hash_data(server.ip);
}
if (req.http.Accept-Encoding ~ "gzip") {
hash_data("gzip");
} elseif (req.http.Accept-Encoding ~ "deflate") {
hash_data("deflate");
}
return (hash);
}
sub vcl_hit {
if (req.request == "PURGE") {
purge;
error 200 "Purged.";
}
}
sub vcl_miss {
if (req.request == "PURGE") {
purge;
error 404 "Purged.";
}
}
sub vcl_fetch {
## 确保所有Cache中的内容在TTL过期后5分钟内不被删除，以应对高并发的场合
set beresp.grace = 5m;
if (beresp.http.Set-Cookie) {
return (hit_for_pass);
}
## 如果返回头有Cache-Control，则删除Set-Cookie头
if (beresp.http.Cache-Control && beresp.ttl > 0s) {
set beresp.grace = 1m;
unset beresp.http.Set-Cookie;
}
## 不缓存大于10MB的资源文件
if (beresp.http.Content-Length ~ "[0-9]{8,}") {
set req.http.x-pipe = "1";
return (restart);
}
if (req.url ~ "\.(php|asp|aspx|jsp|do|ashx|shtml)($|\?)") {
return (hit_for_pass);
}
if (req.request == "GET" && req.url ~ "\.(css|js|bmp|png|gif|jpg|jpeg|ico|gz|tgz|bz2|tbz|zip|rar|mp3|mp4|ogg|swf|flv)($|\?)") {
unset beresp.http.set-cookie;
}
## 如果返回头没有Cache-Control，则标记为hit_for_pass，强制后续请求回源
if ((!beresp.http.Cache-Control && !beresp.http.Expires) ||
beresp.http.Pragma ~ "no-cache" ||
beresp.http.Cache-Control ~ "(no-cache|no-store|private)") {
set beresp.ttl = 120s;
return (hit_for_pass);
}
if (beresp.ttl <= 0s || beresp.http.Set-Cookie || beresp.http.Vary == "*") {
set beresp.ttl = 120s;
return (hit_for_pass);
}
## 对不同类型静态资源进行缓存时间设置
if (req.request == "GET" && req.url ~ "\.(css|js|bmp|png|gif|jpg|jpeg|ico)($|\?)") {
set beresp.ttl = 15m;
} elseif (req.request == "GET" && req.url ~ "\.(gz|tgz|bz2|tbz|zip|rar|mp3|mp4|ogg|swf|flv)($|\?)") {
set beresp.ttl = 30m;
} else {
set beresp.ttl = 10m;
}
return (deliver);
}
sub vcl_deliver {
if (obj.hits > 0) {
set resp.http.X-Cache = "HIT from " + req.http.host;
set resp.http.X-Cache-Hits = obj.hits;
} else {
set resp.http.X-Cache = "MISS from " + req.http.host;
}
## 去掉不必要的头信息
unset resp.http.X-Powered-By;
unset resp.http.Server;
unset resp.http.Via;
unset resp.http.X-Varnish;
unset resp.http.Age;
}
sub vcl_error {
if (obj.status == 503 && req.restarts < 5) {
set obj.http.X-Restarts = req.restarts;
return (restart);
}
}
sub vcl_init {
return (ok);
}
sub vcl_fini {
return (ok);
}
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6、Varnish启动参数配置文件
# vim /usr/local/varnish/etc/varnish.conf
# Configuration file for varnish
#
# /etc/init.d/varnishd expects the variable $DAEMON_OPTS to be set from this
# shell script fragment.
#
# Maximum number of open files (for ulimit -n)
NFILES=131072
# Locked shared memory (for ulimit -l)
# Default log size is 82MB + header
MEMLOCK=82000
# Maximum number of threads (for ulimit -u)
NPROCS="unlimited"
# Set this to 1 to make init script reload try to switch vcl without restart.
# To make this work, you need to set the following variables
# explicit: VARNISH_VCL_CONF, VARNISH_ADMIN_LISTEN_ADDRESS,
# VARNISH_ADMIN_LISTEN_PORT, VARNISH_SECRET_FILE, or in short,
# use Alternative 3, Advanced configuration, below
RELOAD_VCL=1
#
# # Main configuration file. You probably want to change it :)
VARNISH_VCL_CONF=/usr/local/varnish/etc/varnish.vcl
#
# # Default address and port to bind to
# # Blank address means all IPv4 and IPv6 interfaces, otherwise specify
# # a host name, an IPv4 dotted quad, or an IPv6 address in brackets.
VARNISH_LISTEN_ADDRESS=0.0.0.0
VARNISH_LISTEN_PORT=80
#
# # Telnet admin interface listen address and port
VARNISH_ADMIN_LISTEN_ADDRESS=127.0.0.1
VARNISH_ADMIN_LISTEN_PORT=8080
#
# # Shared secret file for admin interface
#VARNISH_SECRET_FILE=/etc/varnish/secret
#
# # The minimum number of worker threads to start
VARNISH_MIN_THREADS=10
#
# # The Maximum number of worker threads to start
VARNISH_MAX_THREADS=5000
#
# # Idle timeout for worker threads
VARNISH_THREAD_TIMEOUT=120
#
# # Cache file location
VARNISH_STORAGE_FILE=/data/varnish/varnish_storage.bin
#
# # Cache file size: in bytes, optionally using k / M / G / T suffix,
# # or in percentage of available disk space using the % suffix.
VARNISH_STORAGE_SIZE=3G
#
# # Backend storage specification
#VARNISH_STORAGE="file,${VARNISH_STORAGE_FILE},${VARNISH_STORAGE_SIZE}"
VARNISH_STORAGE="malloc,${VARNISH_STORAGE_SIZE}"
#
# # Default TTL used when the backend does not specify one
VARNISH_TTL=120
#
# # Other optimization parameter
HTTP_RESP_HDR_LEN="http_resp_hdr_len=8192"
HTTP_MAX_HDR="http_max_hdr=256"
HTTP_REQ_HDR_LEN="http_req_hdr_len=8192"
THREAD_POOLS="thread_pools=8"
THREAD_POOL_MIN="thread_pool_min=50"
THREAD_POOL_MAX="thread_pool_max=5120"
THREAD_POOL_TIMEOUT="thread_pool_timeout=10"
LRU_INTERVAL="lru_interval=20"
LISTEN_DEPTH="listen_depth=1024"
#
# # DAEMON_OPTS is used by the init script. If you add or remove options, make
# # sure you update this section, too.
DAEMON_OPTS="-a ${VARNISH_LISTEN_ADDRESS}:${VARNISH_LISTEN_PORT} \
-f ${VARNISH_VCL_CONF} \
-T ${VARNISH_ADMIN_LISTEN_ADDRESS}:${VARNISH_ADMIN_LISTEN_PORT} \
-t ${VARNISH_TTL} \
-w ${VARNISH_MIN_THREADS},${VARNISH_MAX_THREADS},${VARNISH_THREAD_TIMEOUT} \
-u nobody -g nogroup \
-s ${VARNISH_STORAGE} \
-p ${HTTP_RESP_HDR_LEN} \
-p ${HTTP_MAX_HDR} \
-p ${HTTP_REQ_HDR_LEN} \
-p ${THREAD_POOLS} \
-p ${THREAD_POOL_MIN} \
-p ${THREAD_POOL_MAX} \
-p ${THREAD_POOL_TIMEOUT} \
-p ${LRU_INTERVAL} \
-p ${LISTEN_DEPTH}"
7、Varnish 配置重载脚本
# vim /usr/local/varnish/sbin/varnish_reload_vcl
#!/bin/bash
#
# reload vcl revisited
# A script that loads new vcl based on data from /usr/local/varnish/etc/varnish.conf
# Ingvar Hagelund <[email protected]>
#
# This is free software, distributed under the standard 2 clause BSD license,
# see the LICENSE file in the Varnish documentation directory
#
# The following environment variables have to be set:
# RELOAD_VCL, VARNISH_VCL_CONF, VARNISH_ADMIN_LISTEN_PORT
# The following are optional:
# VARNISH_SECRET_FILE, VARNISH_ADMIN_LISTEN_ADDRESS
#
# Requires GNU bash and GNU date
#
debug=false
missing() {
echo "Missing configuration variable: $1"
exit 2
}
print_debug() {
echo "
Parsed configuration:
RELOAD_VCL=\"$RELOAD_VCL\"
VARNISH_VCL_CONF=\"$VARNISH_VCL_CONF\"
VARNISH_ADMIN_LISTEN_ADDRESS=\"$VARNISH_ADMIN_LISTEN_ADDRESS\"
VARNISH_ADMIN_LISTEN_PORT=\"$VARNISH_ADMIN_LISTEN_PORT\"
VARNISH_SECRET_FILE=\"$VARNISH_SECRET_FILE\"
"
}
# Read configuration
. /usr/local/varnish/etc/varnish.conf
$debug && print_debug
# Check configuration
if [ ! "$RELOAD_VCL" = "1" ]; then
echo "Error: RELOAD_VCL is not set to 1"
exit 2
elif [ -z "$VARNISH_VCL_CONF" ]; then
echo "Error: VARNISH_VCL_CONF is not set"
exit 2
elif [ ! -s "$VARNISH_VCL_CONF" ]; then
echo "Eror: VCL config $VARNISH_VCL_CONF is unreadable or empty"
exit 2
elif [ -z "$VARNISH_ADMIN_LISTEN_ADDRESS" ]; then
echo "Warning: VARNISH_ADMIN_LISTEN_ADDRESS is not set, using 127.0.0.1"
VARNISH_ADMIN_LISTEN_ADDRESS="127.0.0.1"
elif [ -z "$VARNISH_ADMIN_LISTEN_PORT" ]; then
echo "Error: VARNISH_ADMIN_LISTEN_PORT is not set"
exit 2
#elif [ -z "$VARNISH_SECRET_FILE" ]; then
# echo "Warning: VARNISH_SECRET_FILE is not set"
# secret=""
#elif [ ! -s "$VARNISH_SECRET_FILE" ]; then
# echo "Error: varnish secret file $VARNISH_SECRET_FILE is unreadable or empty"
# exit 2
else
# secret="-S $VARNISH_SECRET_FILE"
echo
fi
# Done parsing, set up command
#VARNISHADM="varnishadm $secret -T $VARNISH_ADMIN_LISTEN_ADDRESS:$VARNISH_ADMIN_LISTEN_PORT"
VARNISHADM="/usr/local/varnish/bin/varnishadm -T $VARNISH_ADMIN_LISTEN_ADDRESS:$VARNISH_ADMIN_LISTEN_PORT"
# Now do the real work
new_config="reload_$(date +%FT%H:%M:%S)"
# Check if we are able to connect at all
if $VARNISHADM vcl.list > /dev/null; then
$debug && echo vcl.list succeeded
else
echo "Unable to run $VARNISHADM vcl.list"
exit 1
fi
if $VARNISHADM vcl.list | awk ' { print $3 } ' | grep -q $new_config; then
echo Trying to use new config $new_config, but that is already in use
exit 2
fi
current_config=$( $VARNISHADM vcl.list | awk ' /^active/ { print $3 } ' )
echo "Loading vcl from $VARNISH_VCL_CONF"
echo "Current running config name is $current_config"
echo "Using new config name $new_config"
if $VARNISHADM vcl.load $new_config $VARNISH_VCL_CONF; then
$debug && echo "$VARNISHADM vcl.load succeded"
else
echo "$VARNISHADM vcl.load failed"
exit 1
fi
if $VARNISHADM vcl.use $new_config; then
$debug && echo "$VARNISHADM vcl.use succeded"
else
echo "$VARNISHADM vcl.use failed"
exit 1
fi
$VARNISHADM vcl.list
echo Done
exit 0
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8、Varnish启动脚本
# vim /etc/init.d/varnishd
#!/bin/bash
#
# varnish Control the Varnish Cache
#
# chkconfig: - 90 10
# description: Varnish is a high-perfomance HTTP accelerator
# processname: varnishd
# config: /usr/local/varnish/etc/varnish.conf
# PIDFILE: /var/run/varnishd.pid
#
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
BINFILE="/usr/local/varnish/sbin/varnishd"
PROG="varnishd"
RETVAL=0
GFILE="/usr/local/varnish/etc/varnish.conf"
PIDFILE="/var/run/varnish.pid"
LOCKFILE="/var/lock/varnish.lock"
RELOAD_EXEC="/usr/local/varnish/sbin/varnish_reload_vcl"
[[ -e ${GFILE} ]] && . ${GFILE}
start() {
IS_EXIST=`ps -A -oppid,pid,cmd | grep sbin/${PROG} | grep -v grep`
[[ -n "${IS_EXIST}" ]] && echo "The process of ${PROG} has been running." && exit 1
[[ ! -x ${BINFILE} ]] && echo ${BINFILE} has no found && exit 5
[[ ! -f ${GFILE} ]] && echo ${GFILE} has no found && exit 6
echo -n "Starting Varnish Cache......"
ulimit -n ${NFILES:-131072}
ulimit -l ${MEMLOCK:-82000}
ulimit -u ${NPROCS:-unlimited}
if [[ "${DAEMON_OPTS}X" == "X" ]]; then
echo -n "Please setting DAEMON_OPTS options in ${GFILE}"
RETVAL=6
else
VARNISH_CACHE_DIR=`dirname $VARNISH_STORAGE_FILE`
RETVAL=`grep -w '^VARNISH_STORAGE' ${GFILE} | grep malloc`
if [[ "${RETVAL}X" = "X" ]]; then
mkdir -p ${VARNISH_CACHE_DIR} && chown -R nobody:nogroup ${VARNISH_CACHE_DIR}
else
[[ -e ${VARNISH_CACHE_DIR} ]] && rm -rf ${VARNISH_CACHE_DIR}
fi
${BINFILE} -P ${PIDFILE} $DAEMON_OPTS >/dev/null 2>&1
RETVAL=$?
echo
[[ $RETVAL -eq 0 ]] && touch ${LOCKFILE}
fi
return $RETVAL
}
stop() {
echo -n "Stopping Varnish Cache......"
/sbin/killproc -QUIT ${PROG}
RETVAL=$?
echo
[[ $RETVAL -eq 0 ]] && rm -f ${LOCKFILE}
return $RETVAL
}
restart() {
stop
sleep 1
start
}
reload() {
[[ "$RELOAD_VCL" = "1" ]] && $RELOAD_EXEC || restart
RETVAL=$?
echo
return $RETVAL
}
configtest() {
if [[ -f ${GFILE} ]]; then
${BINFILE} -f ${GFILE} -C -n /tmp >/dev/null 2>&1
RETVAL=$?
[[ $? -eq 0 ]] && echo "The syntax is ok." || echo "The syntax is error."
else
RETVAL=$?
echo "The config file: ${GFILE} is no exists."
fi
return $RETVAL
}
case "$1" in
start|stop|restart|reload|configtest)
$1
;;
*)
echo "Usage: $0 {start|stop|restart|reload|configtest}"
exit 2
esac
exit $RETVAL
# chmod +x /etc/init.d/varnishd
# chkconfig --add varnishd
-----------------------------------------------------------------------------------------------------------------------------------------------
9、Varnish服务健康检查脚本
# vim /usr/local/varnish/sbin/check_varnish_health.sh
#!/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/bin:/usr/local/sbin
## varnish启动参数配置文件
VARNISH_CONFIG="/usr/local/varnish/etc/varnish.conf"
IS_DEBUG=false
[[ -e ${VARNISH_CONFIG} ]] && . ${VARNISH_CONFIG}
${IS_DEBUG} && echo "监听地址：${VARNISH_LISTEN_ADDRESS} 监听端口：${VARNISH_LISTEN_PORT}"
LAN_IPADDR=`/sbin/ifconfig eth1 | awk -F ':' '/inet addr/{print $2}' | sed 's/[a-zA-Z ]//g'`
RETVAL=`nmap --system-dns -sT -p ${VARNISH_LISTEN_PORT} ${LAN_IPADDR} | grep open`
[[ -z ${RETVAL} ]] && /sbin/service varnishd restart >/dev/null 2>&1
# crontab -e
*/5 * * * * /usr/local/varnish/sbin/check_varnish_health.sh >/dev/null 2>&1
Varnish 的详细介绍：请点这里
Varnish 的下载地址：请点这里
本文永久更新链接地址：http://www.linuxidc.com/Linux/2014-07/104757.htm