spread试验
spread还是半年前的时候偶然看到的，一直没有试过。前段时间用gearman收集集群日志时，发现gearman的方式，worker不会知道client来自哪里，一条job只会一个worker来做，比较适合做分布式计算，但相比我最初设想的实时系统管理需求，还是有一定距离。于是重新翻出来spread，感觉可以根据应用系统设置不同的group，然后统一再由一个回收结果的group即可。于是有了如下试验：
- spread安装配置：
bashwget http://www.spread.org/download/spread-src-4.1.0.tar.gz
tar zxvf spread-src-4.1.0.tar.gz
cd spread-src-4.1.0
./configure --prefix=/usr/local/spread && make && make install
cat > /usr/local/spread/etc/spread.conf << EOF
Spread_Segment 10.1.171.255:4804 {
ct-142 10.1.168.142
ct-94 10.1.168.94
ct-241 10.1.168.241
ct-156 10.1.168.156
ct-70 10.1.170.70
cnc-64 10.1.169.64
cnc-80 10.1.169.80
cnc-72 10.1.169.72
cnc-58 10.1.169.58
}
EOF
groupadd spread
useradd -g spread spread
mkdir -p /var/run/spread
chown spread:spread /var/run/spread
echo '/usr/local/spread/lib' > /etc/ld.conf.d/spread.conf && ldconfig
#必须用-n指定配置文件中定义好了的servername；
#奇怪的是网上别的文章都指出这些配置要同时写入hosts，但我没写也一样用了
/usr/local/spread/sbin/spread -c /usr/local/spread/etc/spread.conf -n ct-156 &
- perl的spread使用
CPAN上有很多关于spread的模块，试了几个后，选中了Spread::Messaging::Content。使用如下：
```perl#!/usr/bin/perl -w
use Spread::Messaging::Content;
use Event;
$spread = Spread::Messaging::Content->new(
-port => “4804”,
-timeout => “10”,
-host => “10.1.168.156”,
);
$spread->join_group(“test”);
#当spread的group存在了filedescriptor后，执行子函数；
#$spread->fd来自Spread::Messaging::Transport，这个module是Spread::Messaging::Content自动加载调用的
Event->io(fd => $spread->fd, cb => \&put_output);
Event::loop();
sub put_output {
$spread->recv();
printf(“Sender : %s\n”, $spread->sender);
printf(“Groups : %s\n”, join(‘,’, @{$spread->group}));
printf(“Message : %s\n”, ref($spread->message) eq “ARRAY” ?
join(‘,’, @{$spread->message}) :
$spread->message);
}
perl#!/usr/bin/perl -w
use Spread::Messaging::Content;
$spread = Spread::Messaging::Content->new(
-port => “4804”,
-timeout => “10”,
-host => “10.1.168.156”,
);
$spread->group(“test2”);
$spread->type(“0”);
$spread->message(“cooking with fire”);
$spread->send();```
- spread自带的spuser使用
bash/usr/local/spread/bin/spuser -s 4804
j test
m test
