351 lines
11 KiB
Markdown
351 lines
11 KiB
Markdown
# Setting up a local development environment
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This document is intended to guide you through setting up a local development environment for Colouring London. This guide assumes you already have Ubuntu 18.04 or 20.04 server installed, typically installed in a virtual environment such a VirtualBox and are able to SSH into your Ubuntu installation for convenience.
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<details>
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<summary>
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Configuring an Ubuntu VM in VirtualBox
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</summary>
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When setting up the VirtualBox VM, consider the size of the database you intend to load for use with the application. Consult the [loading the data](#loading-the-data) section of this guide and decide whether you will be using a full city database or will load test data from OSM.
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For "Colouring London", we have found that the size of the database means that a VM with access to 50GB of storage is appropriate. If you are using the OSM test data, the default storage settings in VirtualBox should suffice.
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##### In either case, you should set the memory to `2048` MB.
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If you a running Ubuntu in a virtual environment you will need to configure networking to forward ports from the guest to the host. For Virtual Box the following was configured under NAT port forwarding (found under `Settings -> Network -> Advanced -> Port Forwarding`).
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Name | Protocol | Host Port | Guest Port
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-------- | --------- | ---------- | -----------
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app | TCP | 8080 | 3000
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app_dev | TCP | 3001 | 3001
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ssh | TCP | 4022 | 22
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To run the commands in the rest of this setup guide, either `ssh` into the VirtualBox environment or open the terminal within the Ubuntu GUI.
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If you wish to `ssh`, you will first need to open the terminal in Ubuntu and run the following.
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```bash
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sudo apt-get install -y openssh-server
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```
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You can then `ssh` into the VirtualBox VM set up with the port forwarding described above like so, where `<linuxusername>` is the name you set up during the installation of Ubuntu (you can type `whoami` in the Ubuntu terminal to remind yourself of this).
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```bash
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ssh <linuxusername>@localhost -p 4022
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```
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</details>
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## Installing the tools and components
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First upgrade the installed packages to the latest versions, to remove any security warnings.
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```bash
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sudo apt-get update -y
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sudo apt-get upgrade -y
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```
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Now we install some essential tools.
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```bash
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sudo apt-get install -y build-essential git vim-nox wget curl
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```
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Set the postgres repo for apt.
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```bash
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sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list'
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```
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```bash
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sudo wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
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sudo apt-get update
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```
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Next install postgres and postgis to enable support for geographical objects.
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```bash
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sudo apt-get install -y postgresql postgresql-contrib libpq-dev postgis postgresql-14-postgis-3
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```
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and additional geo-spatial tools
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```bash
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sudo apt-get install -y gdal-bin libspatialindex-dev libgeos-dev libproj-dev
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```
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Now clone the colouring london codebase.
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```bash
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git clone https://github.com/colouring-london/colouring-london.git
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```
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Now install Node. It is helpful to define some local variables.
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```bash
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export NODE_VERSION=v16.13.2
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export DISTRO=linux-x64
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wget -nc https://nodejs.org/dist/$NODE_VERSION/node-$NODE_VERSION-$DISTRO.tar.xz
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sudo mkdir /usr/local/lib/node
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sudo tar xf node-$NODE_VERSION-$DISTRO.tar.xz -C /usr/local/lib/node
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sudo mv /usr/local/lib/node/node-$NODE_VERSION-$DISTRO /usr/local/lib/node/node-$NODE_VERSION
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rm node-$NODE_VERSION-$DISTRO.tar.xz
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```
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Now add the Node installation to the path and export this to your bash profile.
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```bash
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cat >> ~/.profile <<EOF
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export NODEJS_HOME=/usr/local/lib/node/node-$NODE_VERSION/bin
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export PATH=\$NODEJS_HOME:\$PATH
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EOF
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```
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Then run source to make sure node and npm are on your path:
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```bash
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source ~/.profile
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```
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You can check the updated variables as follows
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```bash
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echo $PATH
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echo $NODEJS_HOME
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```
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## Configuring Postgres
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Now we configure postgres. First ensure postgres is running.
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```bash
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service postgresql start
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```
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Ensure the `en_US` locale exists.
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```bash
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sudo locale-gen en_US.UTF-8
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```
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Configure the database to listen on network connection.
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```bash
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sudo sed -i "s/#\?listen_address.*/listen_addresses '*'/" /etc/postgresql/14/main/postgresql.conf
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```
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Allow authenticated connections from any IP (so includes the host).
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```bash
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echo "host all all all md5" | sudo tee --append /etc/postgresql/14/main/pg_hba.conf > /dev/null
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```
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Restart postgres to pick up config changes.
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```bash
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service postgresql restart
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```
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Create a superuser role for this user (`<username>`) if it does not already exist. The
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password `<pgpassword>` is arbitrary and probably should not be your Ubuntu login password.
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```bash
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sudo -u postgres psql -c "SELECT 1 FROM pg_user WHERE usename = '<username>';" | grep -q 1 || sudo -u postgres psql -c "CREATE ROLE <username> SUPERUSER LOGIN PASSWORD '<pgpassword>';"
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```
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Set the `<pgpassword>` as an environment variable.
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```bash
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export PGPASSWORD=<pgpassword>
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```
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Create a colouring london database if none exists. The name (`<colouringlondondb>`) is arbitrary.
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```bash
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sudo -u postgres psql -c "SELECT 1 FROM pg_database WHERE datname = '<colouringlondondb>';" | grep -q 1 || sudo -u postgres createdb -E UTF8 -T template0 --locale=en_US.utf8 -O <username> <colouringlondondb>
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```
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Run `psql` interactively.
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```bash
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psql -d <colouringlondondb> -U <username> -h localhost
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```
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In `psql`, necessary postgres extensions.
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```bash
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create extension postgis;
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create extension pgcrypto;
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create extension pg_trgm;
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```
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Then quit `psql` by typing `\q` and hitting return.
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Now run all 'up' migrations to create tables, data types, indexes etc. The `.sql` scripts to
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do this are located in the `migrations` folder of your local repository.
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```bash
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ls ./colouring-london/migrations/*.up.sql 2>/dev/null | while read -r migration; do psql -d <colouringlondondb> -U <username> -h localhost < $migration; done;
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```
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## Setting up Node
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Now upgrade the npm package manager to the most recent release with global privileges. This
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needs to be performed as root user, so it is necessary to export the node variables to the
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root user profile. Don't forget to exit from root at the end.
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```bash
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sudo su root
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export NODEJS_HOME=/usr/local/lib/node/node-v16.13.2/bin/
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export PATH=$NODEJS_HOME:$PATH
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npm install -g npm@latest
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exit
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```
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Now install the required Node packages. This needs to done from the `app` directory of your
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local repository, so that it can read from the `package.json` file.
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```bash
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cd ./colouring-london/app
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npm install
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```
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## Loading the data
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<details>
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<summary> With a database dump </summary>
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If you are a developer on the Colouring London project (or another Colouring Cities project), you may have a production database (or staging etc) that you wish to duplicate in your development environment.
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Log into the environment where your production database is kept and create a dump file from the db.
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```bash
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pg_dump <colouringlondondb> > <dumpfile>
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```
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You should then download the file to the machine where you are setting up your development environment. If you are using Virtualbox, you could host share the dump file with the VM via a shared folder (e.g. [see these instructions for Mac](https://medium.com/macoclock/share-folder-between-macos-and-ubuntu-4ce84fb5c1ad)).
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In your Ubuntu installation where you have been running these setup steps (e.g. Virtualbox VM), you can then recrate the db like so.
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```bash
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psql -d <colouringlondondb> -U <username> -h localhost < <dumpfile>
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```
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</details>
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<details>
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<summary> With test data </summary>
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Run the following two sections if you wish to load test buildings into the application from OpenStreetMaps (OSM).
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#### Set up Python:
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Install python and related tools.
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```bash
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sudo apt-get install -y python3 python3-pip python3-dev python3-venv
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```
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Now set up a virtual environment for python. In the following example we have named the
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virtual environment *colouringlondon* but it can have any name.
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```bash
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pyvenv colouringlondon
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```
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Activate the virtual environment so we can install python packages into it.
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```bash
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source colouringlondon/bin/activate
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```
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Install python pip package manager and related tools.
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```bash
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pip install --upgrade pip
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pip install --upgrade setuptools wheel
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```
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#### Load OpenStreetMap test polygons:
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First install prerequisites.
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```bash
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sudo apt-get install parallel
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```
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Install the required python packages. This relies on the `requirements.txt` file located
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in the `etl` folder of your local repository.
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```bash
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cd ~/colouring-london/etl/
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pip install -r requirements.txt
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```
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To help test the Colouring London application, `get_test_polygons.py` will attempt to save a small (1.5km²) extract from OpenStreetMap to a format suitable for loading to the database.
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First open `colouring-london/etl/load_geometries.sh` and `colouring-london/etl/create_building_records.sh` and add this `-d` flag to all the `psql` statements present (two in the former, one in the latter):
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```bash
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-d <colouringlondondb> -U <username> -h localhost
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```
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Then run:
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```bash
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# download test data
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python get_test_polygons.py
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```
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Note: the first time you run it, you will get these warnings:
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```
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rm: cannot remove 'test_buildings.geojson': No such file or directory
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rm: cannot remove 'test_buildings.3857.csv': No such file or directory
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```
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```bash
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# load all building outlines
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./load_geometries.sh ./
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# index geometries (should be faster after loading)
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psql -U <username> -h localhost -d <colouringlondondb> < ../migrations/002.index-geometries.up.sql
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# create a building record per outline
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./create_building_records.sh
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# index building records
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psql -U <username> -h localhost -d <colouringlondondb> < ../migrations/003.index-buildings.up.sql
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```
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#### Re-run database migrations
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Re-run the remaining migrations in `../migrations` to create the rest of the database structure.
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```bash
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ls ./colouring-london/migrations/*.up.sql 2>/dev/null | while read -r migration; do psql -d <colouringlondondb> < $migration; done;
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```
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</details>
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## Running the application
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Now we are ready to run the application. The `APP_COOKIE_SECRET` is arbitrary.
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First enter the app directory.
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```bash
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cd ./colouring-london/app
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```
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Then create a folder for the tilecache.
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```bash
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mkdir tilecache
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```
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Finally, run the application.
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```bash
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PGPASSWORD=<pgpassword> PGDATABASE=<colouringlondondb> PGUSER=<username> PGHOST=localhost PGPORT=5432 APP_COOKIE_SECRET=123456 TILECACHE_PATH=./colouring-london/app/tilecache npm start
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```
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The site can then be viewed on http://localhost:8080. The `app_dev` mapping is used in
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development by Razzle which rebuilds and serves client side assets on the fly.
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Finally to quit the application type `Ctrl-C`.
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