mirror of
https://github.com/osm-search/Nominatim.git
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152 lines
4.5 KiB
Markdown
152 lines
4.5 KiB
Markdown
Nominatim installation
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======================
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This page contains generic installation instructions for Nominatim and its
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prerequisites. There are also step-by-step instructions available for
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the following operating systems:
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* [Ubuntu 16.04](install-on-ubuntu-16.md)
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* [CentOS 7.2](install-on-centos-7.md)
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These OS-specific instructions can also be found in executable form
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in the `vagrant/` directory.
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Prerequisites
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-------------
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### Software
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For compiling:
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* [cmake](https://cmake.org/)
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* [libxml2](http://xmlsoft.org/)
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* a recent C++ compiler
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Nominatim comes with its own version of osm2pgsql. See the
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[osm2pgsql README](../osm2pgsql/README.md) for additional dependencies
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required for compiling osm2pgsql.
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For running tests:
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* [lettuce](http://lettuce.it)
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* [Shapely](http://toblerity.org/shapely/index.html)
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* [Psycopg2](http://initd.org/psycopg)
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* [nose](https://nose.readthedocs.io)
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* [phpunit](https://phpunit.de)
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For running Nominatim:
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* [PostgreSQL](http://www.postgresql.org) (9.1 or later)
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* [PostGIS](http://postgis.refractions.net) (2.0 or later)
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* [PHP](http://php.net)
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* PHP-pgsql
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* [PEAR::DB](http://pear.php.net/package/DB)
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* a webserver (apache or nginx are recommended)
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For running continuous updates:
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* [osmosis](http://wiki.openstreetmap.org/wiki/Osmosis)
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### Hardware
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A minimum of 2GB of RAM is required or installation will fail. For a full
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planet import 32GB of RAM or more strongly are recommended.
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For a full planet install you will need about 500GB of hard disk space (as of
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June 2016, take into account that the OSM database is growing fast). SSD disks
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will help considerably to speed up import and queries.
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On a 6-core machine with 32GB RAM and SSDs the import of a full planet takes
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a bit more than 2 days. Without SSDs 7-8 days are more realistic.
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Setup of the server
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-------------------
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### PostgreSQL tuning
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You might want to tune your PostgreSQL installation so that the later steps
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make best use of your hardware. You should tune the following parameters in
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your `postgresql.conf` file.
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shared_buffers (2GB)
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maintenance_work_mem (10GB)
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work_mem (50MB)
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effective_cache_size (24GB)
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synchronous_commit = off
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checkpoint_segments = 100
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checkpoint_timeout = 10min
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checkpoint_completion_target = 0.9
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The numbers in brackets behind some parameters seem to work fine for
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32GB RAM machine. Adjust to your setup.
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For the initial import, you should also set:
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fsync = off
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full_page_writes = off
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Don't forget to reenable them after the initial import or you risk database
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corruption. Autovacuum must not be switched off because it ensures that the
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tables are frequently analysed.
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### Webserver setup
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The `website/` directory in the build directory contains the configured
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website. Include the directory into your webbrowser to serve php files
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from there.
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#### Configure for use with Apache
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Make sure your Apache configuration contains the required permissions for the
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directory and create an alias:
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<Directory "/srv/nominatim/build/website">
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Options FollowSymLinks MultiViews
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AddTpe text/html .php
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Require all granted
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</Directory>
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Alias /nominatim /srv/nominatim/build/website
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`/srv/nominatim/build` should be replaced with the location of your
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build directory.
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After making changes in the apache config you need to restart apache.
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The website should now be available on http://localhost/nominatim.
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#### Configure for use with Nginx
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Use php-fpm as a deamon for serving PHP cgi. Install php-fpm together with nginx.
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By default php listens on a network socket. If you want it to listen to a
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Unix socket instead, change the pool configuration (`pool.d/www.conf`) as
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follows:
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; Comment out the tcp listener and add the unix socket
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;listen = 127.0.0.1:9000
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listen = /var/run/php5-fpm.sock
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; Ensure that the daemon runs as the correct user
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listen.owner = www-data
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listen.group = www-data
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listen.mode = 0666
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Tell nginx that php files are special and to fastcgi_pass to the php-fpm
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unix socket by adding the location definition to the default configuration.
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location ~ [^/]\.php(/|$) {
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fastcgi_split_path_info ^(.+?\.php)(/.*)$;
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if (!-f $document_root$fastcgi_script_name) {
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return 404;
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}
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fastcgi_pass unix:/var/run/php5-fpm.sock;
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fastcgi_index index.php;
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include fastcgi.conf;
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}
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Restart the nginx and php5-fpm services and the website should now be available
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on http://localhost/.
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Now continue with [importing the database](Import_and_update.md).
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