remove CentOS installation instructions

[nominatim.git] / docs / admin / Installation.md

diff --git a/docs/admin/Installation.md b/docs/admin/Installation.md
index b5176617d9c59c0720b2fd243a8d2f505aeb74d9..e77dccf480b4bd8c3bfb92cf2dacd81c1ab443e9 100644 (file)
--- a/docs/admin/Installation.md
+++ b/docs/admin/Installation.md
@@ -4,9 +4,8 @@ This page contains generic installation instructions for Nominatim and its
 prerequisites. There are also step-by-step instructions available for
 the following operating systems:
 
 prerequisites. There are also step-by-step instructions available for
 the following operating systems:
 

+  * [Ubuntu 20.04](../appendix/Install-on-Ubuntu-20.md)

   * [Ubuntu 18.04](../appendix/Install-on-Ubuntu-18.md)
   * [Ubuntu 18.04](../appendix/Install-on-Ubuntu-18.md)

-  * [Ubuntu 16.04](../appendix/Install-on-Ubuntu-16.md)
-  * [CentOS 7.2](../appendix/Install-on-Centos-7.md)

 
 These OS-specific instructions can also be found in executable form
 in the `vagrant/` directory.
 
 These OS-specific instructions can also be found in executable form
 in the `vagrant/` directory.


@@ -16,142 +15,165 @@ and can't offer support.
 
   * [Docker](https://github.com/mediagis/nominatim-docker)
   * [Docker on Kubernetes](https://github.com/peter-evans/nominatim-k8s)
 
   * [Docker](https://github.com/mediagis/nominatim-docker)
   * [Docker on Kubernetes](https://github.com/peter-evans/nominatim-k8s)

+  * [Kubernetes with Helm](https://github.com/robjuz/helm-charts/blob/master/charts/nominatim/README.md)

   * [Ansible](https://github.com/synthesio/infra-ansible-nominatim)
 
 ## Prerequisites
 
 ### Software
 
   * [Ansible](https://github.com/synthesio/infra-ansible-nominatim)
 
 ## Prerequisites
 
 ### Software
 

+!!! Warning
+    For larger installations you **must have** PostgreSQL 11+ and PostGIS 3+
+    otherwise import and queries will be slow to the point of being unusable.
+    Query performance has marked improvements with PostgreSQL 13+ and PostGIS 3.2+.
+

 For compiling:
 
   * [cmake](https://cmake.org/)
 For compiling:
 
   * [cmake](https://cmake.org/)

-  * [libxml2](http://xmlsoft.org/)
-  * a recent C++ compiler
-
-Nominatim comes with its own version of osm2pgsql. See the
-osm2pgsql README for additional dependencies required for compiling osm2pgsql.
-
-For running tests:
-
-  * [behave](http://pythonhosted.org/behave/)
-  * [Psycopg2](https://initd.org/psycopg)
-  * [nose](https://nose.readthedocs.io)
-  * [phpunit](https://phpunit.de)
+  * [expat](https://libexpat.github.io/)
+  * [proj](https://proj.org/)
+  * [bzip2](http://www.bzip.org/)
+  * [zlib](https://www.zlib.net/)
+  * [ICU](http://site.icu-project.org/)
+  * [Boost libraries](https://www.boost.org/), including system and filesystem
+  * PostgreSQL client libraries
+  * a recent C++ compiler (gcc 5+ or Clang 3.8+)

 
 For running Nominatim:
 
 
 For running Nominatim:
 

-  * [PostgreSQL](https://www.postgresql.org) (9.3 or later)
-  * [PostGIS](https://postgis.org) (2.2 or later)
+  * [PostgreSQL](https://www.postgresql.org) (9.6+ will work, 11+ strongly recommended)
+  * [PostGIS](https://postgis.net) (2.2+ will work, 3.0+ strongly recommended)
+  * [Python 3](https://www.python.org/) (3.6+)
+  * [Psycopg2](https://www.psycopg.org) (2.7+)
+  * [Python Dotenv](https://github.com/theskumar/python-dotenv)
+  * [psutil](https://github.com/giampaolo/psutil)
+  * [Jinja2](https://palletsprojects.com/p/jinja/)
+  * [PyICU](https://pypi.org/project/PyICU/)
+  * [PyYaml](https://pyyaml.org/) (5.1+)
+  * [datrie](https://github.com/pytries/datrie)

   * [PHP](https://php.net) (7.0 or later)
   * PHP-pgsql
   * PHP-intl (bundled with PHP)
   * [PHP](https://php.net) (7.0 or later)
   * PHP-pgsql
   * PHP-intl (bundled with PHP)

-  * a webserver (apache or nginx are recommended)
+  * PHP-cgi (for running queries from the command line)

 
 For running continuous updates:
 
 
 For running continuous updates:
 

-  * [pyosmium](https://osmcode.org/pyosmium/) (with Python 3)
+  * [pyosmium](https://osmcode.org/pyosmium/)
+
+For dependencies for running tests and building documentation, see
+the [Development section](../develop/Development-Environment.md).

 
 ### Hardware
 
 A minimum of 2GB of RAM is required or installation will fail. For a full
 
 ### Hardware
 
 A minimum of 2GB of RAM is required or installation will fail. For a full

-planet import 32GB of RAM or more are strongly recommended.
-
-For a full planet install you will need at least 700GB of hard disk space
-(take into account that the OSM database is growing fast). SSD disks
-will help considerably to speed up import and queries.
+planet import 128GB of RAM or more are strongly recommended. Do not report
+out of memory problems if you have less than 64GB RAM.

 
 

-On a 6-core machine with 32GB RAM and SSDs the import of a full planet takes
-a bit more than 2 days. Without SSDs 7-8 days are more realistic.
+For a full planet install you will need at least 1TB of hard disk space.
+Take into account that the OSM database is growing fast.
+Fast disks are essential. Using NVME disks is recommended.

 
 

+Even on a well configured machine the import of a full planet takes
+around 2 days. On traditional spinning disks, 7-8 days are more realistic.

 
 

-## Setup of the server
-
-### PostgreSQL tuning
+## Tuning the PostgreSQL database

 
 You might want to tune your PostgreSQL installation so that the later steps
 make best use of your hardware. You should tune the following parameters in
 your `postgresql.conf` file.
 
 
 You might want to tune your PostgreSQL installation so that the later steps
 make best use of your hardware. You should tune the following parameters in
 your `postgresql.conf` file.
 

-    shared_buffers (2GB)
-    maintenance_work_mem (10GB)
-    work_mem (50MB)
-    effective_cache_size (24GB)
+    shared_buffers = 2GB
+    maintenance_work_mem = (10GB)
+    autovacuum_work_mem = 2GB
+    work_mem = (50MB)
+    effective_cache_size = (24GB)

     synchronous_commit = off
     synchronous_commit = off

-    checkpoint_segments = 100 # only for postgresql <= 9.4
+    max_wal_size = 1GB

     checkpoint_timeout = 10min
     checkpoint_completion_target = 0.9
 
 The numbers in brackets behind some parameters seem to work fine for
     checkpoint_timeout = 10min
     checkpoint_completion_target = 0.9
 
 The numbers in brackets behind some parameters seem to work fine for

-32GB RAM machine. Adjust to your setup.
+64GB RAM machine. Adjust to your setup. A higher number for `max_wal_size`
+means that PostgreSQL needs to run checkpoints less often but it does require
+the additional space on your disk.
+
+Autovacuum must not be switched off because it ensures that the
+tables are frequently analysed. If your machine has very little memory,
+you might consider setting:
+
+    autovacuum_max_workers = 1
+
+and even reduce `autovacuum_work_mem` further. This will reduce the amount
+of memory that autovacuum takes away from the import process.

 
 For the initial import, you should also set:
 
     fsync = off
     full_page_writes = off
 
 
 For the initial import, you should also set:
 
     fsync = off
     full_page_writes = off
 

-Don't forget to reenable them after the initial import or you risk database
-corruption. Autovacuum must not be switched off because it ensures that the
-tables are frequently analysed.
+Don't forget to re-enable them after the initial import or you risk database
+corruption.
+
+
+## Downloading and building Nominatim

 
 

-### Webserver setup
+### Downloading the latest release

 
 

-The `website/` directory in the build directory contains the configured
-website. Include the directory into your webbrowser to serve php files
-from there.
+You can download the [latest release from nominatim.org](https://nominatim.org/downloads/).
+The release contains all necessary files. Just unpack it.

 
 

-#### Configure for use with Apache
+### Downloading the latest development version

 
 

-Make sure your Apache configuration contains the required permissions for the
-directory and create an alias:
+If you want to install latest development version from github, make sure to
+also check out the osm2pgsql subproject:

 
 

-    <Directory "/srv/nominatim/build/website">
-      Options FollowSymLinks MultiViews
-      AddType text/html   .php
-      DirectoryIndex search.php
-      Require all granted
-    </Directory>
-    Alias /nominatim /srv/nominatim/build/website
+```
+git clone --recursive https://github.com/openstreetmap/Nominatim.git
+```

 
 

-`/srv/nominatim/build` should be replaced with the location of your
-build directory.
+The development version does not include the country grid. Download it separately:

 
 

-After making changes in the apache config you need to restart apache.
-The website should now be available on http://localhost/nominatim.
+```
+wget -O Nominatim/data/country_osm_grid.sql.gz https://www.nominatim.org/data/country_grid.sql.gz
+```

 
 

-#### Configure for use with Nginx
+### Building Nominatim

 
 

-Use php-fpm as a deamon for serving PHP cgi. Install php-fpm together with nginx.
+The code must be built in a separate directory. Create the directory and
+change into it.

 
 

-By default php listens on a network socket. If you want it to listen to a
-Unix socket instead, change the pool configuration (`pool.d/www.conf`) as
-follows:
+```
+mkdir build
+cd build
+```

 
 

-    ; Comment out the tcp listener and add the unix socket
-    ;listen = 127.0.0.1:9000
-    listen = /var/run/php5-fpm.sock
+Nominatim uses cmake and make for building. Assuming that you have created the
+build at the same level as the Nominatim source directory run:

 
 

-    ; Ensure that the daemon runs as the correct user
-    listen.owner = www-data
-    listen.group = www-data
-    listen.mode = 0666
+```
+cmake ../Nominatim
+make
+sudo make install
+```

 
 

-Tell nginx that php files are special and to fastcgi_pass to the php-fpm
-unix socket by adding the location definition to the default configuration.
+!!! warning
+    The default installation no longer compiles the PostgreSQL module that
+    is needed for the legacy tokenizer from older Nominatim versions. If you
+    are upgrading an older database or want to run the
+    [legacy tokenizer](../customize/Tokenizers.md#legacy-tokenizer) for
+    some other reason, you need to enable the PostgreSQL module via
+    cmake: `cmake -DBUILD_MODULE=on ../Nominatim`. To compile the module
+    you need to have the server development headers for PostgreSQL installed.
+    On Ubuntu/Debian run: `sudo apt install postgresql-server-dev-<postgresql version>`

 
 

-    root /srv/nominatim/build/website;
-    index search.php index.html;
-    location ~ [^/]\.php(/|$) {
-        fastcgi_split_path_info ^(.+?\.php)(/.*)$;
-        if (!-f $document_root$fastcgi_script_name) {
-            return 404;
-        }
-        fastcgi_pass unix:/var/run/php5-fpm.sock;
-        fastcgi_index search.php;
-        include fastcgi.conf;
-    }

 
 

-Restart the nginx and php5-fpm services and the website should now be available
-at `http://localhost/`.
+Nominatim installs itself into `/usr/local` per default. To choose a different
+installation directory add `-DCMAKE_INSTALL_PREFIX=<install root>` to the
+cmake command. Make sure that the `bin` directory is available in your path
+in that case, e.g.

 
 

+```
+export PATH=<install root>/bin:$PATH
+```

 
 

-Now continue with [importing the database](Import-and-Update.md).
+Now continue with [importing the database](Import.md).