11 April 2012

Директивы nginx – root и alias

Решил для разнообразия написать компьютерный пост на русском – благо это просто краткая заметка для моей памяти.

Для связывания URL и локального пути в ядре nginx есть две директивы: root и alias. Обычно используется первая – например, в такой форме:

Здесь запрос любого файла с расширением htm, html, jpeg и т.д. будет связан с локальным путём /usr/home/mysite.ru/pub – анпример, http://mysite.ru/path/file.rar адресуется к /usr/home/mysite.ru/pub/path/file.rar. Как видно, nginx включает в локальный путь путь из URL (/path/).

Однако иногда нужно больше гибкости – часто нужно исключить путь к файлу в URL из локального пути, либо если используются регулярные выражения – вставить их совпадения в путь ($1 и т.д.). Это делается директивой alias:

В этом примере мы перенаправляем запрос вида http://mysite.ru/bundles/mybundle/resource.css в /usr/local/www/somewhere/bundles/MYBUNDLE/public/RESOURCE.CSS – как видим, новое расположение может быть вне любого «document root» (такого понятия в nginx по сути нет), а также может использовать $N из выражения родительского **(http://nginx.org/ru/docs/http/ngx_http_core_module.html#location location))**ю

10 April 2012

Glitches with FreeBSD shared library file perms

Today I got finally tired of constant server hangs because of Apache's httpd process' segfaults (signal 15) every one-two days and decided to rebuild all ports I have installed because, as I know, segfauls happen when binaries/shared libraries were built on a different system than on the one they're ran at. Or if they were linked to old library versions before an upgrade, for instance.

So I did this with shportupgrade -rRfbuv apache option which took the server roughly 8 hours to complete. However, after that I got zillion of Cyrus messages in my error log saying things like:

These lines quickly filled the logs resulting in 690 Megabytes (!). I didn't have a clue for some time and restarting Cyrus, Postfix or the entire server yielded no visible changes. Then I looked further into the log file – somewhere in the middle there turned out to be several lines like this:

I tried to execute the listed command from under the cyrus user and got this message:

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21 January 2011

An easy way to synchronize your FreeBSD clock

Time synchronization is performed by ntpdate program that uses NTP. You can manually synchronize your compuetr's clock by:

If you want to always keep your clock up to date you can use cron – just add the following line to your root's crontab:

It will update time each hour at its 01 minute.

Quick tip on editing cron tables

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20 January 2011

Setting up SMTP authorization for Postfix using Cyrus SASL

A follow-up article on my guide for setting up Postfix + Cyrus mail server. Today we're preparing SMTP auth - not so easy as it seems!

This is part 2 of my tutorial on setting up your own e-mail host.

While stalking the Internet I have stumbled upon this handy script that will collect info about your SASL installation and SMTP auth configuration and display it – I almost haven't used it but it looked pretty nice so I thought I'd share it with you.
Note that it needs bash to run (on my FreeBSD 8 it wasn't installed bydefault, you can get it from /usr/ports/shells/bash/.

Intro – why use SMTP auth?

First of all let's remember a strange-sounding config option of Postfix' main.cf file which we saw yesterday when setting it up: it's mynetworks_style. Until today I didn't realy realize what it was for and why have «trusted» and «strangers» when receiving incoming mail. I didn't care and set it to subnet (as it was by default) and everything worked fine.

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19 January 2011

Your Own Mail Host – Postfix, Cyrus, FreeBSD

The complete guide to setup your own e-mail host on FreeBSD 8 using Postfix & Cyrus.

There's a second part of this tutorial talking about SMTP authorization of Postfix.

Intro

Getting up my own e-mail host was always fascinating me. Several days ago I finally decided to give it a try.

I have a server in my house that's hang up near the ceiling in the kitchen. It runs FreeBSD and some sites of mine served by Apache & nginx. I decided to set up a mail system there so I can have a neat address like sοmewhο@i-forge.net.

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Posts tagged “FreeBSD”