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1 # Basic Installation
2
3 This page contains generic installation instructions for Nominatim and its
4 prerequisites. There are also step-by-step instructions available for
5 the following operating systems:
6
7   * [Ubuntu 24.04](Install-on-Ubuntu-24.md)
8   * [Ubuntu 22.04](Install-on-Ubuntu-22.md)
9
10 These OS-specific instructions can also be found in executable form
11 in the `vagrant/` directory.
12
13 Users have created instructions for other frameworks. We haven't tested those
14 and can't offer support.
15
16   * [Docker](https://github.com/mediagis/nominatim-docker)
17   * [Docker on Kubernetes](https://github.com/peter-evans/nominatim-k8s)
18   * [Kubernetes with Helm](https://github.com/robjuz/helm-charts/blob/master/charts/nominatim/README.md)
19   * [Ansible](https://github.com/synthesio/infra-ansible-nominatim)
20
21 ## Prerequisites
22
23 ### Software
24
25 For running Nominatim:
26
27   * [PostgreSQL](https://www.postgresql.org) (12+ will work, 13+ strongly recommended)
28   * [PostGIS](https://postgis.net) (3.0+ will work, 3.2+ strongly recommended)
29   * [osm2pgsql](https://osm2pgsql.org) (1.8+, optional when building with CMake)
30   * [Python 3](https://www.python.org/) (3.7+)
31
32 Furthermore the following Python libraries are required:
33
34   * [Psycopg3](https://www.psycopg.org)
35   * [Python Dotenv](https://github.com/theskumar/python-dotenv)
36   * [psutil](https://github.com/giampaolo/psutil)
37   * [Jinja2](https://palletsprojects.com/p/jinja/)
38   * [PyICU](https://pypi.org/project/PyICU/)
39   * [PyYaml](https://pyyaml.org/) (5.1+)
40   * [datrie](https://github.com/pytries/datrie)
41
42 These will be installed automatically when using pip installation.
43
44 When using legacy CMake-based installation:
45
46   * [cmake](https://cmake.org/)
47   * [expat](https://libexpat.github.io/)
48   * [proj](https://proj.org/)
49   * [bzip2](http://www.bzip.org/)
50   * [zlib](https://www.zlib.net/)
51   * [ICU](http://site.icu-project.org/)
52   * [nlohmann/json](https://json.nlohmann.me/)
53   * [Boost libraries](https://www.boost.org/), including system and file system
54   * PostgreSQL client libraries
55   * a recent C++ compiler (gcc 5+ or Clang 3.8+)
56
57 For running continuous updates:
58
59   * [pyosmium](https://osmcode.org/pyosmium/)
60
61 For running the Python frontend:
62
63   * [SQLAlchemy](https://www.sqlalchemy.org/) (1.4.31+ with greenlet support)
64   * [asyncpg](https://magicstack.github.io/asyncpg) (0.8+, only when using SQLAlchemy < 2.0)
65   * one of the following web frameworks:
66     * [falcon](https://falconframework.org/) (3.0+)
67     * [starlette](https://www.starlette.io/)
68   * [uvicorn](https://www.uvicorn.org/)
69
70 For dependencies for running tests and building documentation, see
71 the [Development section](../develop/Development-Environment.md).
72
73 ### Hardware
74
75 A minimum of 2GB of RAM is required or installation will fail. For a full
76 planet import 128GB of RAM or more are strongly recommended. Do not report
77 out of memory problems if you have less than 64GB RAM.
78
79 For a full planet install you will need at least 1TB of hard disk space.
80 Take into account that the OSM database is growing fast.
81 Fast disks are essential. Using NVME disks is recommended.
82
83 Even on a well configured machine the import of a full planet takes
84 around 2.5 days. When using traditional SSDs, 4-5 days are more realistic.
85
86 ## Tuning the PostgreSQL database
87
88 You might want to tune your PostgreSQL installation so that the later steps
89 make best use of your hardware. You should tune the following parameters in
90 your `postgresql.conf` file.
91
92     shared_buffers = 2GB
93     maintenance_work_mem = (10GB)
94     autovacuum_work_mem = 2GB
95     work_mem = (50MB)
96     synchronous_commit = off
97     max_wal_size = 1GB
98     checkpoint_timeout = 60min
99     checkpoint_completion_target = 0.9
100     random_page_cost = 1.0
101     wal_level = minimal
102     max_wal_senders = 0
103
104 The numbers in brackets behind some parameters seem to work fine for
105 128GB RAM machine. Adjust to your setup. A higher number for `max_wal_size`
106 means that PostgreSQL needs to run checkpoints less often but it does require
107 the additional space on your disk.
108
109 Autovacuum must not be switched off because it ensures that the
110 tables are frequently analysed. If your machine has very little memory,
111 you might consider setting:
112
113     autovacuum_max_workers = 1
114
115 and even reduce `autovacuum_work_mem` further. This will reduce the amount
116 of memory that autovacuum takes away from the import process.
117
118 ## Downloading and building Nominatim
119
120 ### Downloading the latest release
121
122 You can download the [latest release from nominatim.org](https://nominatim.org/downloads/).
123 The release contains all necessary files. Just unpack it.
124
125 ### Downloading the latest development version
126
127 If you want to install latest development version from github, make sure to
128 also check out the osm2pgsql subproject:
129
130 ```
131 git clone --recursive https://github.com/openstreetmap/Nominatim.git
132 ```
133
134 The development version does not include the country grid. Download it separately:
135
136 ```
137 wget -O Nominatim/data/country_osm_grid.sql.gz https://nominatim.org/data/country_grid.sql.gz
138 ```
139
140 ### Building Nominatim
141
142 #### Building the latest development version with pip
143
144 Nominatim is easiest to run from its own virtual environment. To create one, run:
145
146     sudo apt-get install virtualenv
147     virtualenv /srv/nominatim-venv
148
149 To install Nominatim directly from the source tree into the virtual environment, run:
150
151     /srv/nominatim-venv/bin/pip install packaging/nominatim-{db,api}
152
153 #### Building in legacy CMake mode
154
155 !!! warning
156     Installing Nominatim through CMake is now deprecated. The infrastructure
157     will be removed in Nominatim 5.0. Please switch to pip installation.
158
159 The code must be built in a separate directory. Create the directory and
160 change into it.
161
162 ```
163 mkdir build
164 cd build
165 ```
166
167 Nominatim uses cmake and make for building. Assuming that you have created the
168 build at the same level as the Nominatim source directory run:
169
170 ```
171 cmake ../Nominatim
172 make
173 sudo make install
174 ```
175
176 Nominatim installs itself into `/usr/local` per default. To choose a different
177 installation directory add `-DCMAKE_INSTALL_PREFIX=<install root>` to the
178 cmake command. Make sure that the `bin` directory is available in your path
179 in that case, e.g.
180
181 ```
182 export PATH=<install root>/bin:$PATH
183 ```
184
185 Now continue with [importing the database](Import.md).