水车

Apache支持perl在web的应用

sakia — Wed, 03 Feb 2010 10:46:38 +0800

apache支持perl在web的应用

1、安装apache
如apache安装在/usr/local/apache2/
2、安装perl
perl默认在linux系统里是自带的，

PS：要注意安装版本的差异，版本过低会报错
Can’t locate Apache/Response.pm in @INC …

Found this issue in Aurora SPARC Linux 2.0 (Fedora Core 3 for SPARC) when trying to install… turns out that after installing all the modules for rt, I still had an ancient verion of CGI.pm, which was not intended to correctly detect the mod_perl2 modules vs. regular mod_perl. Upgrading CGI via CPAN quickly resolved this problem after an embarrassing number of hours troubleshooting.

If Apache refuses to start after you add PerlRequire bin/webmux.pl to your config and you’re sure you’ve got a valid mod_perl2 installation, try upgrading CGI to the latest version.

3、安装mod_perl
如我现在版本

tar zxvf mod_perl-2.0-current.tar.gz
cd mod_perl-2.0.4
perl Makefile.PL
make
make test
make install

PS：如果apache在运行帐号的权限是nobody的话，而mod_perl-2.0.4是在root在目录下，在make test的过程将会报错
You are running the test suite under user ‘root’.
Apache cannot spawn child processes as ‘root’, therefore
we attempt to run the test suite with user ‘nobody’ (99:99).
The problem is that the path (including all parent directories):
/root/mod_perl-2.0.4/t
must be ‘rwx’ by user ‘nobody’, so Apache can read and write under that
path.

建议将mod_perl-2.0.4 放在/tmp目录下

安装后将会在/usr/local/apache2/modules/有一个mod_perl.so
ls /usr/local/apache2/modules/mod_perl.so

4、配置http.conf
在http.conf里
a、载入模块
LoadModule perl_module modules/mod_perl.so
b、<IfModule mime_module>里加入后缀解析
AddHandler cgi-script .cgi .pl

c、vhost设置里加入执行

<VirtualHost *:80>
ServerName www.588k.com
DocumentRoot /opt/wwwroot/www.588k.com
ScriptAlias /perl/ “/opt/wwwroot/www.588k.com/perl/” ##/opt/wwwroot/www.588k.com/perl为网站的documentroot的perl目录

<Location /perl>
SetHandler perl-script
PerlHandler ModPerl::Registry
Options +ExecCGI
allow from all
PerlSendHeader On
</Location>

</VirtualHost>

5、测试
先重启apache
在documentroot下建立test.pl 内容如下

#!/usr/bin/perl -w
use CGI;
{
my $q = new CGI;
print $q->header(),
$q->start_html(”hello perl world!”),
$q->h1(’hello perl world, by sakia’),
$q->end_html();
}

通过http://www.588k.com/perl/test.pl如果能够正常输出
hello perl world, by sakia

配置成功

VMware conversion error: Error: Unable to obtain the IP address of the target virtual machine running the Converter helper server.

sakia — Tue, 26 Jan 2010 14:41:09 +0800

While running VMware converter, one may encounter this error;

Error: Unable to obtain the IP address of the target virtual machine running the Converter helper server.

For those who may not know how to fix it, it’s really easy (and I feel a little ashamed that I have to post the solution here, but who knows, someone may need the help, so step forward my young Padawan, and pay attention)…

The helper virtual machine must be able to establish an SSH connection with the source computer. By default the helper virtual machine gets its IP address assigned by DHCP. If there is no DHCP server available on the network chosen for the target virtual machine you must manually assign it an IP address.

大致翻译：Converter转化机必须能ssh连接源机器。默认情况下Converter转化机通过DHCP来获取目标虚拟机的IP地址，如果网络内没有DHCP服务器对目标虚拟机分配IP，那必须手工来设定目标虚拟机的IP地址
所以如果没有对目标虚拟机设置一个ip的话，将会出现上述的报错

利用sendmail发送附件

sakia — Wed, 13 Jan 2010 15:57:42 +0800

sendmail发附件需要用uuencode命令这个命令在sharutils组件中，可以远程安装

apt-get install sharutils
yum install sharutils

也可以用rpm安装，可以去安装光盘里找。如我的redhat 5.2 x_86_64系统，rpm包：sharutils-4.6.1-2.x86_64.rpm
安装后有uuencode命令

开启sendmail服务
#/etc/rc.d/init.d/sendmail start

现在就可以发送附件了
uuencode /root/tmp.tar tmp.tar | mail -s “tmp.tar” xxx@email.com

注：如上发送时如果加上邮件内容
uuencode /root/tmp.tar tmp.tar | mail -s “tmp.tar” xxx@email.com < >test….
>EOF
如此发送的话，邮件内容将会覆盖掉附件。

shmmax的含义与设置小结

sakia — Wed, 16 Dec 2009 17:18:51 +0800

shmmax内核参数定义单个共享内存段的最大值,即单个进程的最大内存使用量，如果该参数设置小于某些进程的设置，那么就会被分配多个共享内存段。这在繁忙的系统中可能成为性能负担，带来系统问题。32位CPU的寻址空间是4G，32位机器shmmax一般不能超过4G

老版本CentOS、Redhat的shmmax默认值为33554432字节(33554432bytes/1024/1024=32MB)。现在新版本是
[root@localhost ~]# cat /proc/sys/kernel/shmmax
4294967295

长久修改shmmax的值：
vi /etc/sysctl.conf 编辑这个文件,在最后一行加入
kernel shmmax = 807374182
然后执行以下命令使配置生效：
/sbin/sysctl -p

临时更改该值：
echo 字节数 > /proc/sys/kernel/shmmax

按照以上方法更改，在每次重启系统时，该值会被自动还原。如果想永久更改，可以修改/etc/sysctl.conf文件，设置：
kernel.shmmax = 字节数

注：vi /etc/sysctl.conf 编辑这个文件,在最后一行加入
kernel shmmax = 807374182
重启生效.

php-fpm报错

sakia — Thu, 10 Dec 2009 11:17:23 +0800

[ERROR] fpm_unix_conf_wp(), line 124: please specify user and group other than root, pool ‘default’

安装完php-cgi 不能启动

[ERROR] fpm_unix_conf_wp(), line 124: please specify user and group other than root, pool ‘default’

出现些错误提示，请修改 php-fpm.conf，将注释去掉

Unix user of processes