Using variables in Nginx location rules

Question

In Nginx  I m trying to define a variable which allows me to configure a sub-folder for all my location blocks  I did this   set  folder   test    location  folder                location  folder something                Unfortunately  this doesn t seem to work  While Nginx doesn t complain about the syntax  it returns a 404 when requesting  test   If I write the folder in explicitly  it works  So how can I use variables in location blocks

User · Answer

A modified python version of  danack s PHP generate script  It generates all files  amp  folders that live inside of build  to the parent directory  replacing all   placeholder   matches  You need to cd into build  before running the script   File structure  build  --  files folders you want to generate  -- build py  sites-available     sites-enabled     nginx conf       build py  import os  re    Configurations target   os path join            variables        placeholder    your replacement here        Loop files def loop cb  subdir        dir   os path join      subdir      for name in os listdir dir       file   os path join dir  name      newsubdir   os path join subdir  name       if name     build py   continue     if os path isdir file   loop cb  newsubdir      else  cb subdir  name      Update file def replacer subdir  name     dir    os path join target  subdir    file   os path join dir  name    oldfile   os path join      subdir  name     with open oldfile   r   as fin      data   fin read      for key  replacement in variables iteritems        data   re sub r    s     key     s      replacement  data     if not os path exists dir       os makedirs dir     with open file   w   as fout      fout write data      Start variable replacements  loop replacer

User · Answer

You could do the opposite of what you proposed   location   test        set  folder  1     location   test  something      set  folder  1

User · Answer

This is many years late but since I found the solution I ll post it here  By using maps it is possible to do what was asked   map  http host  variable name       hostnames       default        ap       example com    api         example org  whatever      server       location  variable name test           proxy pass  auth proxy            If you need to share the same endpoint across multiple servers  you can also reduce the cost by simply defaulting the value   map     variable name       default        test       Map can be used to initialise a variable based on the content of a string and can be used inside http scope allowing variables to be global and sharable across servers

User · Answer

You can t  Nginx doesn t really support variables in config files  and its developers mock everyone who ask for this feature to be added        Variables  are rather costly compared to plain static configuration   A  macro expansion and  include  directives should be used  with  e g  sed   make or any other common template mechanism   http   nginx org en docs faq variables in config html    You should either write or download a little tool that will allow you to generate config files from placeholder config files   Update The code below still works  but I ve wrapped it all up into a small PHP program library called Configurator also on Packagist  which allows easy generation of nginx php-fpm etc config files  from templates and various forms of config data   e g  my nginx source config file looks like this   location          try files  uri  routing php  args      fastcgi pass   unix  phpfpm socket  php-fpm-www sock      include        mysite root directory  conf fastcgi conf      And then I have a config file with the variables defined   phpfpm socket  var run php-fpm socket mysite root directory  home mysite   And then I generate the actual config file using that  It looks like you re a Python guy  so a PHP based example may not help you  but for anyone else who does use PHP    lt  php  require once  path php      filesToGenerate   array       conf nginx conf    gt   autogen nginx conf        conf mysite nginx conf    gt   autogen mysite nginx conf        conf mysite php-fpm conf    gt   autogen mysite php-fpm conf        conf my cnf    gt   autogen my cnf        environment    amazonec2    if   argc  gt   2        environmentRequired    argv 1         allowedVars   array           amazonec2            macports               if  in array  environmentRequired   allowedVars     true            environment    environmentRequired          else      echo  Defaulting to     environment    environment       config   getConfigForEnvironment  environment    foreach  filesToGenerate as  inputFilename   gt   outputFilename       generateConfigFile PATH TO ROOT  inputFilename  PATH TO ROOT  outputFilename   config       function    getConfigForEnvironment  environment        config   parse ini file PATH TO ROOT  conf deployConfig ini   TRUE        configWithMarkers   array        foreach  config  environment  as  key   gt   value            configWithMarkers      key         value             return   configWithMarkers      function    generateConfigFile  inputFilename   outputFilename   config         lines   file  inputFilename        if  lines     FALSE           echo  Failed to read     inputFilename    for reading            exit -1               fileHandle   fopen  outputFilename   w         if  fileHandle     FALSE           echo  Failed to read     outputFilename    for writing            exit -1               search   array keys  config        replace   array values  config        foreach  lines as  line            line   str replace  search   replace   line           fwrite  fileHandle   line              fclose  fileHandle        gt    And then deployConfig ini looks something like    global    global variables go here    amazonec2  nginx log directory    var log nginx nginx root directory    usr share nginx nginx conf directory    etc nginx nginx run directory     var run nginx user             nginx   macports  nginx log directory    opt local var log nginx nginx root directory    opt local share nginx nginx conf directory    opt local etc nginx nginx run directory     opt local var run nginx user              www

[variables] Using variables in Nginx location rules

Examples related to variables

Examples related to nginx

Examples related to webserver