Difference between pages "Package:Nginx" and "Install/pt-br/Profiles"

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{{Ebuild
=== Profiles ===
|Summary=Robust, small and high performance HTTP and reverse proxy server
|CatPkg=www-servers/nginx
|Maintainer=Drobbins
|Repository=Funtoo Overlay
|Overlay=Funtoo
}}
[[Image:nginx.gif|frame]]


nginx (pronounced "engin-x") is a Web and reverse proxy server for HTTP, SMTP, POP3 and IMAP protocols. It focuses on high concurrency, performance and low memory usage. Nginx quickly delivers static content with efficient use of system resources, also dynamic content is delivered on a network using FastCGI, SCGI handlers for scripts, uWSGI application servers or Phusion Passenger module (atm broken in [http://funtoo.org funtoo]), further more it can serve a very capable software load balancer. It uses an asynchronos event-driven approach to handle requests which provides more predictable performance under load, in contrast to the Apache HTTP server model, that uses a threaded or process-oriented approach to handling request. Nginx is licensed under a BSD-like license and it runs on Unix, Linux, BSD variants, Mac OS X, Solaris, AIX and Microsoft Windows.  
Uma vez que você tenha reiniciado no Funtoo Linux, você pode mais tarde personalizar seu sistema para as suas necessidade ao usar o Funtoo Profiles.


=== USE Expanded flags ===
[[Funtoo 1.0 Profile|Funtoo profiles]] are used to define defaults for Portage specific to your needs. There are 4 basic profile types: arch, build, [[Flavors and Mix-ins|flavor, and mix-ins]]:


Furthermore, you can set the nginx modules you like to use in ''/etc/make.conf'' in the NGINX_MODULES_HTTP variable as NGINX_MODULES_HTTP="variables".
;arch: typically <code>x86-32bit</code> or <code>x86-64bit</code>, this defines the processor type and support of your system. This is defined when your stage was built and should not be changed.
;build: defines whether your system is a <code>current</code>, <code>stable</code> or <code>experimental</code> build. <code>current</code> systems will have newer packages unmasked than <code>stable</code> systems.
;flavor: defines the general type of system, such as <code>server</code> or <code>desktop</code>, and will set default USE flags appropriate for your needs.
;mix-ins: define various optional settings that you may be interested in enabling.


nginx USE flags go into ''/etc/portage/package.use'' or ''/etc/portage/package.use/nginx'', while the HTTP and MAIL modules go as NGINX_MODULES_HTTP or NGINX_MODULES_MAIL are stored in /etc/make.conf. And as you wouldn't server only static html files, but most commonly also php files/scripts you should also install php with fpm enabled and xcache for caching the content, what makes your nginx setup way faster. For xcache you need to set PHP_TARGETS="php5-3" in '/etc/make.conf'.
One arch, build and flavor must be set for each Funtoo Linux system, while mix-ins are optional and you can enable more than one if desired.
 
Remember that profiles can often be inherited. For example, the <code>desktop</code> flavor inherits the <code>workstation</code> flavor settings, which in turn inherits the <code>X</code> and <code>audio</code> mix-ins. You can view this by using eselect:


Example:
<console>
<console>
###i## echo "www-servers/nginx USE-FLAG-List" >> /etc/portage/package.use/nginx
(chroot) # ##i##eselect profile show
Currently set profiles:
    arch: gentoo:funtoo/1.0/linux-gnu/arch/x86-64bit
  build: gentoo:funtoo/1.0/linux-gnu/build/current
  flavor: gentoo:funtoo/1.0/linux-gnu/flavor/desktop
mix-ins: gentoo:funtoo/1.0/linux-gnu/mix-ins/kde
 
Automatically enabled profiles:
mix-ins: gentoo:funtoo/1.0/linux-gnu/mix-ins/print
mix-ins: gentoo:funtoo/1.0/linux-gnu/mix-ins/X
mix-ins: gentoo:funtoo/1.0/linux-gnu/mix-ins/audio
mix-ins: gentoo:funtoo/1.0/linux-gnu/mix-ins/dvd
mix-ins: gentoo:funtoo/1.0/linux-gnu/mix-ins/media
mix-ins: gentoo:funtoo/1.0/linux-gnu/mix-ins/console-extras
</console>
</console>


=== Emerging nginx ===
To view installed profiles:
<console>
(chroot) # ##i##eselect profile list
</console>


Now you are ready to install nginx with php and xcache support:
To change the profile flavor:
<console>
<console>
###i## emerge -avt nginx php xcache
(chroot) # ##i##eselect profile set-flavor 7
</console>
</console>
so now just check your useflags and press enter to start emerge.


=== Configuring ===
To add a mix-in:


All configuration is done in ''/etc/nginx'' with ''nginx.conf'' as the main configuration file and all virtual hosts in ''/etc/nginx/sites/available'' while you have to symlink ''/etc/nginx/sites-available/{VHOST}'' to ''/etc/nginx/sites-enabled/{VHOST}'' to activate them. An example config for such a {VHOST} looks like that:
<console>
 
(chroot) # ##i##eselect profile add 10
<pre>
</console>
server {
    listen          80;
    server_name    www.example.com;
 
    access_log      /var/log/nginx/www.example.com.access_log main;
    error_log      /var/log/nginx/www.example.com.error_log info;
 
    root /var/www/www.example.com/htdocs;
}
</pre>
 
The ''nginx.conf'' and ''sites-available/localhost'' file is well commented. Customize it to your needs. Make sure you set the listen option correctly. By default, the listen option is set to listen on the loopback interface. If you leave this unchanged other computers on the network will not be able to connect to the server.
 
==== php-fpm ====
 
nginx does not natively support php, so we delegate that responsibility to [[Package:PHP#Fpm | php-fpm]]
 
{{file|name=/etc/nginx/sites-available/localhost|desc=fpm configuration|body=
server {
        ...
index index.php index.cgi index.htm index.html;
location ~ .php$ {
        fastcgi_pass 127.0.0.1:9000;
include fastcgi.conf;
        }
        ...
}
}}
 
==== php caching ====
{{file|name=/etc/nginx/sites-available/localhost|desc=fpm cache configuration|body=
fastcgi_cache_path /etc/nginx/cache levels=1:2 keys_zone=MYAPP:100m inactive=60m;
fastcgi_cache_key "$scheme$request_method$host$request_uri";
server {
...
        location ~ \.php$ {
...
fastcgi_cache MYAPP;
fastcgi_cache_valid 200 60m;
...
}}
[https://www.digitalocean.com/community/tutorials/how-to-setup-fastcgi-caching-with-nginx-on-your-vps for more information on php caching]
 
==== proxy_pass====
This configuration proxies to other webservers.  In this example we have webrick running on port 3000 behind nginx producing the live link http://localhost/rails
 
{{file|name=/etc/nginx/sites-available/localhost|desc=rails or python configurations|body=
server {
        ...
location /rails/ {
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_pass http://127.0.0.1:3000/; #for ruby on rails webrick
            #proxy_pass http://127.0.0.1:8000/; #for python -m http.server
            #proxy_pass http://127.0.0.1:8080/; #for other web servers like apache, lighttpd, tengine, cherokee, etc...
}
        ...
}
}}
 
=== Location Processing Order ===
One often confusing aspect of nginx configuration is the order in which it processes location directives. This section is intended to clarify the confusion and help you to write secure nginx location directives.
 
==== Two basic types of Location directives ====
There are two basic types of location directives. The first is called a "conventional string", and looks something like this:
location /foo { deny all; }
The second basic type of location directive is a regex, or regular expression block. In its most basic form, it looks like this, with a "~" and then a regular expression that is matched against the request path. "^" can be used to match the beginning of the request path, and "$" can be used to match the end of the request path. If you need to match a ".", you must escape it as "\." as per regular expression matching rules:
location ~ \.php$ { blah; }
 
==== The basic algorithm ====
Nginx uses a special algorithm to find the proper location string to match the incoming request. The basic concept to remember is that conventional string directives are placed in one "bucket", and then regular expression strings are placed in another "bucket". Nginx will use the first regular expression match that it finds, when scanning the file from top to bottom. If no matching regular expression is found, nginx will look in its "conventional string" bucket, and try to find a match. In the case of the conventional string matches, the most ''specific'' match will be used, in other words, the one will be used that matches the greatest number of characters in the request path.
 
This is the foundation for nginx location processing, so always use these rules as a starting point for understanding location matching order. Nginx then provides various sub-types of location directives which modify this default behavior in a number of ways. This will be covered in the next section.
 
=== Advanced Location Processing ===
Always use the location processing logic described in the previous section as the foundation for understanding how nginx finds a matching location directive, and then once you are comfortable with how this works, read about these more advanced directives and understand how they fit into nginx's overall logic.
 
==== = (equals) Location ====
One advanced location directive is the "=" location, which can be considered a variant of a "conventional string" directive. "=" directives are searched before all other directives, and if a match found, then the corresponding location block is used. A "=" location must the requested path ''exactly'' and ''completely''. For example, the following location block will match only the request /foo/bar, but not /foo/bar/oni.html:
location = /foo/bar { deny all; }
 
==== ~* (case-insensitive regex) Location ====
A "~*" regex match is just like a regular "~" regex match, except matches will be performed in a case-insensitive manner. "~*" location directives, being regex directives, fall into the regex "bucket" and are processed along other regex directives. This means that they are processed in the order they appear in your configuration file and the first match will be used -- assuming no "=" directives match.
 
==== ^~ (short-circuit conventional string) Location ====
You may think that a "^~" location is a regex location, but it is not. It is a variant of a conventional string location. If you recall, nginx will search for conventional string matches by finding the ''most specific'' match. However, when you use a "^~" location, nginx behavior is modified. Imagine the way a conventional string match works. Nginx scans your configuration file, looking at each conventional string match from line 1 to the end of file, but it scans ''all'' conventional string matches to find the ''best'' match. Well, the "~^" location match short-circuits this process. If, in the process of scanning each conventional string match in the config file, nginx encounters a "^~" match that matches the current request path, then nginx will apply this match, and stop looking for the ''best'' match.
 
=== Ebuild Update Protocol ===
 
To work on a new version of the ebuild, perform the following steps.
 
First, temporarily set the following settings in <tt>/etc/make.conf</tt>:
 
<syntaxhighlight lang="bash">
NGINX_MODULES_HTTP="*"
NGINX_MODULES_MAIL="*"
</syntaxhighlight>
 
This will enable all available modules for nginx.
 
Now, create a new version of the ebuild in your overlay, and look at all the modules listed at the top of the ebuild. Visit the URLs in the comments above each one and ensure that the latest versions of each are included. Now run <tt>ebuild nginx-x.y.ebuild clean install</tt> to ensure that all modules patch/build properly. Basic build testing is now complete.
 
=== Troubleshooting ===
====502====
502 Bad Gateway is caused by nginx being started and php-fpm not being started.
 
=== Media ===
{{#widget:YouTube|playlist=PL0k5C_Zqzft0QyD3G4l9cp8h1waSuNWlm}}
{{EbuildFooter}}

Revision as of 21:51, March 10, 2015

Profiles

Uma vez que você tenha reiniciado no Funtoo Linux, você pode mais tarde personalizar seu sistema para as suas necessidade ao usar o Funtoo Profiles.

Funtoo profiles are used to define defaults for Portage specific to your needs. There are 4 basic profile types: arch, build, flavor, and mix-ins:

arch
typically x86-32bit or x86-64bit, this defines the processor type and support of your system. This is defined when your stage was built and should not be changed.
build
defines whether your system is a current, stable or experimental build. current systems will have newer packages unmasked than stable systems.
flavor
defines the general type of system, such as server or desktop, and will set default USE flags appropriate for your needs.
mix-ins
define various optional settings that you may be interested in enabling.

One arch, build and flavor must be set for each Funtoo Linux system, while mix-ins are optional and you can enable more than one if desired.

Remember that profiles can often be inherited. For example, the desktop flavor inherits the workstation flavor settings, which in turn inherits the X and audio mix-ins. You can view this by using eselect:

(chroot) # eselect profile show
Currently set profiles:
    arch: gentoo:funtoo/1.0/linux-gnu/arch/x86-64bit
   build: gentoo:funtoo/1.0/linux-gnu/build/current
  flavor: gentoo:funtoo/1.0/linux-gnu/flavor/desktop
 mix-ins: gentoo:funtoo/1.0/linux-gnu/mix-ins/kde

Automatically enabled profiles:
 mix-ins: gentoo:funtoo/1.0/linux-gnu/mix-ins/print
 mix-ins: gentoo:funtoo/1.0/linux-gnu/mix-ins/X
 mix-ins: gentoo:funtoo/1.0/linux-gnu/mix-ins/audio
 mix-ins: gentoo:funtoo/1.0/linux-gnu/mix-ins/dvd
 mix-ins: gentoo:funtoo/1.0/linux-gnu/mix-ins/media
 mix-ins: gentoo:funtoo/1.0/linux-gnu/mix-ins/console-extras

To view installed profiles:

(chroot) # eselect profile list

To change the profile flavor:

(chroot) # eselect profile set-flavor 7

To add a mix-in:

(chroot) # eselect profile add 10