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Setting Up a Production Environment

Preliminaries

This guide assumes a virtual environment running Ubuntu 18_04.

Install updates to packages:

sudo apt-get update

sudo apt-get dist-upgrade

Install openSSH (if necessary)

sudo apt install openssh-server

Install essential tools

sudo apt-get install -y build-essential git vim-nox wget curl

Install postgres and associated tools

sudo apt-get install -y postgresql postgresql-contrib libpq-dev postgis postgresql-10-postgis-2.4

sudo apt-get install -y gdal-bin libspatialindex-dev libgeos-dev libproj-dev

Now that GIT is installed, clone the remote repository

git clone https://github.com/tomalrussell/colouring-london.git

Define a couple of convenience variables NODE_VERSION=v8.11.3 DISTRO=linux-x64

Get the Node distribution and install it

wget -nc https://nodejs.org/dist/$NODE_VERSION/node-$NODE_VERSION-$DISTRO.tar.xz

sudo mkdir /usr/local/lib/node

sudo tar xf node-$NODE_VERSION-$DISTRO.tar.xz -C /usr/local/lib/node

sudo mv /usr/local/lib/node/node-$NODE_VERSION-$DISTRO /usr/local/lib/node/node-$NODE_VERSION

rm node-$NODE_VERSION-$DISTRO.tar.xz

Export the NODE_JS variable to your bash profile cat >> ~/.profile <<EOF export NODEJS_HOME=/usr/local/lib/node/node-$NODE_VERSION/bin export PATH=$NODEJS_HOME:$PATH EOF

Configure Postgres

sudo service postgresql start

sudo locale-gen en_US.UTF-8

sudo sed -i "s/#\?listen_address.*/listen_addresses '*'/" /etc/postgresql/10/main/postgresql.conf

echo "host all all all md5" | sudo tee --append /etc/postgresql/10/main/pg_hba.conf > /dev/null

For production we do not want to use our Ubuntu username as the postgres username. So we need to replace peer authentication with password authentication for local connections.

sudo sed -i 's/^local.*all.*all.*peer$/local all all md5/' /etc/postgresql/10/main/pg_hba.conf

Restart postgres for the changes to take effect

sudo service postgresql restart

Create a distinct postgres user

sudo -u postgres psql -c "SELECT 1 FROM pg_user WHERE usename = 'cldbadmin';" | grep -q 1 || sudo -u postgres psql -c "CREATE ROLE cldbadmin SUPERUSER LOGIN PASSWORD 'om10ram%';"

Create default colouring london database

sudo -u postgres psql -c "SELECT 1 FROM pg_database WHERE datname = 'colorlondondb';" | grep -q 1 || sudo -u postgres createdb -E UTF8 -T template0 --locale=en_US.utf8 -O cldbadmin colorlondondb

psql -d colorlondondb -U cldbadmin -c "create extension postgis;"

psql -d colorlondondb -U cldbadmin -c "create extension pgcrypto;"

psql -d colorlondondb -U cldbadmin -c "create extension pg_trgm;"

Import data from most recent colouring london database dump

pg_restore --no-privileges --no-owner --username "cldbadmin" --dbname "colorlondondb" --clean "/home/cacolorlondon/db/colouringlondonbeta_2018-12-10.dump"

Setting up Node

Now upgrade the npm package manager to the most recent release with global privileges. This needs to be performed as root user, so it is necessary to export the node variables to the root user profile.

sudo su root

export NODEJS_HOME=/usr/local/lib/node/node-v8.11.3/bin/

export PATH=$NODEJS_HOME:$PATH

npm install -g npm@next

exit

cd ./colouring-london/app && npm install

Setting up NGINX

Install Nginx

sudo apt install nginx

Configure linux firewall

sudo ufw app list

sudo ufw allow 'Nginx HTTP'

sudo ufw allow OpenSSH

sudo ufw status

sudo ufw enable

Edit sites-available/default to create a minimal Nginx configuration to test the installation

sudo nano /etc/nginx/sites-available/default

# Handle HTTP connections with redirect
server {
    listen 80 default_server;
    listen [::]:80 default_server;
    server_name colouring-london;
    
    location / {
            proxy_pass http://localhost:3000/;
            proxy_set_header X-Real-IP $remote_addr;
   }

}

Make sure you didn't introduce any syntax errors by typing:

sudo nginx -t

If all is well, restart Nginx

sudo systemctl restart nginx

Test out the configuration

cd colouring-london/app

npm run build

PGPASSWORD=<postgres_password> PGDATABASE=colorlondondb PGUSER=cldbadmin PGHOST=localhost PGPORT=5432 APP_COOKIE_SECRET=<secret> npm run start:prod

Set up PM2

Perform a global install of PM2

sudo su root

export NODEJS_HOME=/usr/local/lib/node/node-v8.11.3/bin/

export PATH=$NODEJS_HOME:$PATH

npm install -g pm2

exit

Create ecosystem.config.js file from template

cd ~/colouring-london

nano ecosystem.config.template.js

// Template for production ecosystem file

// Copy this file and edit to set up pm2 config
// DO NOT COMMIT details to this file (publicly visible)
// See https://pm2.io/doc/en/runtime/guide/ecosystem-file/ for docs
module.exports = {
    apps: [
        {
            name: "colouringlondon",
            script: "./app/build/server.js",
            instances: 2,
            env: {
                NODE_ENV: "production",
                PGHOST: "localhost",
                PGPORT: 5432,
                PGDATABASE: "colorlondondb",
                PGUSER: "cldbadmin",
                PGPASSWORD: "longrandomspassword",
                APP_COOKIE_SECRET: "longrandomsecret",
                TILECACHE_PATH: "~/colouring-london/app/tilecache"
            }
        }
    ]
}

Edit the above file as appropriate and save as ecosystem.config.js

Start colouring-london

cd ~/colouring-london

pm2 start ecosystem.config.js

To stop the colouring-london app type:

pm2 stop ecosystem.config.js

Set up SSL - TO DO

DON'T FORGET to open Firewall (443)

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