fab-manager/docker

full procedure to put into production a fabmanager app with Docker

This README tries to describe all steps to put a fabmanager app into production on a server, based on a solution using Docker and DigitalOcean. In order to make all this stuff working, please use the same directories structure as described in this guide in your fabmanager app folder.

docker/env

Make a copy of the env.example and use it as a starting point. List all the environment variables needed by your application.

docker/nginx_with_ssl.conf.example

• Use nginx.conf.example especially if you are not using SSL
• Replace MAIN_DOMAIN (example: fab-manager.com).
• Replace URL_WITH_PROTOCOL_HTTPS (example: https://www.fab-manager.com).
• Replace ANOTHER_URL_1, ANOTHER_URL_2 (example: .fab-manager.fr)

Things are getting serious, starting deployment process guys

setup the server

Go to DigitalOcean and create a Droplet with operating system coreOS stable. You need at least 2GB of addressable memory (RAM + swap) to install and use FabManager!. Choose datacenter. Set hostname as your domain name.

Buy domain name and link it with the droplet

1. Buy a domain name on OVH
2. Replace IP of the domain with droplet's IP (you can enable the flexible ip and use it)
3. Do not fuck up trying to access your domain name right away, DNS are not aware of the change yet so WAIT and be patient.

Connect to the droplet via SSH

You can already connect to the server with this command: ssh core@droplet-ip. When DNS propagation will be done, you will be able to connect to the server with ssh core@your-domain-name.

Create SWAP file in coreOS

Firstly, switch to sudo and create swap file

sudo -i  
touch /2GiB.swap  
chattr +C /2GiB.swap  
fallocate -l 2048m /2GiB.swap  
chmod 600 /2GiB.swap  
mkswap /2GiB.swap  

Create file /etc/systemd/system/swap.service, filling it with the lines:

[Unit]  
Description=Turn on swap  
[Service]  
Type=oneshot  
Environment="SWAPFILE=/2GiB.swap"  
RemainAfterExit=true  
ExecStartPre=/usr/sbin/losetup -f ${SWAPFILE}  
ExecStart=/usr/bin/sh -c "/sbin/swapon $(/usr/sbin/losetup -j ${SWAPFILE} | /usr/bin/cut -d : -f 1)"  
ExecStop=/usr/bin/sh -c "/sbin/swapoff $(/usr/sbin/losetup -j ${SWAPFILE} | /usr/bin/cut -d : -f 1)"  
ExecStopPost=/usr/bin/sh -c "/usr/sbin/losetup -d $(/usr/sbin/losetup -j ${SWAPFILE} | /usr/bin/cut -d : -f 1)"  
[Install]  
WantedBy=multi-user.target  

Then add service and start:

systemctl enable /etc/systemd/system/swap.service  
systemctl start swap
exit

Setup folders and env file

mkdir -p /home/core/fabmanager/config

Copy the previously customized env file as /home/core/fabmanager/config/env.

mkdir -p /home/core/fabmanager/config/nginx

Copy the previously customized nginx.conf as /home/core/fabmanager/config/nginx/fabmanager.conf.

Deploy dockers containers on host

docker pull redis:3.0
docker pull postgres:9.4
docker pull elasticsearch:1.7
docker pull sleede/fab-manager

docker run --restart=always -d --name=fabmanager-postgres -v /home/core/fabmanager/postgresql:/var/lib/postgresql/data postgres:9.4
docker run --restart=always -d --name=fabmanager-redis -v /home/core/fabmanager/redis:/data redis:3.0
docker run --restart=always  -d --name=fabmanager-elastic -v /home/core/fabmanager/elasticsearch:/usr/share/elasticsearch/data elasticsearch:1.7

Rails specific commands

DB CREATE

docker run --rm \
           --link=fabmanager-postgres:postgres \
           --link=fabmanager-redis:redis \
           --link=fabmanager-elastic:elasticsearch \
           -e RAILS_ENV=production \
           --env-file /home/core/fabmanager/config/env \
           sleede/fab-manager \
           bundle exec rake db:create

DB MIGRATE

docker run --rm \
           --link=fabmanager-postgres:postgres \
           --link=fabmanager-redis:redis \
           --link=fabmanager-elastic:elasticsearch \
           -e RAILS_ENV=production \
           --env-file /home/core/fabmanager/config/env \
           sleede/fab-manager \
           bundle exec rake db:migrate

DB SEED

docker run --rm \
           --link=fabmanager-postgres:postgres \
           --link=fabmanager-redis:redis \
           --link=fabmanager-elastic:elasticsearch \
           -e RAILS_ENV=production \
           --env-file /home/core/fabmanager/config/env \
           sleede/fab-manager \
           bundle exec rake db:seed

PREPARE ELASTIC

docker run --rm \
             --link=fabmanager-postgres:postgres \
             --link=fabmanager-postgres:postgres \
             --link=fabmanager-redis:redis \
             --link=fabmanager-elastic:elasticsearch \
             -e RAILS_ENV=production \
             --env-file /home/core/fabmanager/config/env \
             sleede/fab-manager \
             bundle exec rake fablab:es_build_stats

BUILD ASSETS

docker run --rm \
             --link=fabmanager-postgres:postgres \
             --link=fabmanager-redis:redis \
             --link=fabmanager-elastic:elasticsearch \
             -e RAILS_ENV=production \
             --env-file /home/core/fabmanager/config/env \
             -v /home/core/fabmanager/public/assets:/usr/src/app/public/assets \
             sleede/fab-manager \
             bundle exec rake assets:precompile

RUN APP

docker run --restart=always -d --name=fabmanager \
             -p 80:80 \
             -p 443:443 \
             --link=fabmanager-postgres:postgres \
             --link=fabmanager-redis:redis \
             --link=fabmanager-elastic:elasticsearch \
             -e RAILS_ENV=production \
             -e RACK_ENV=production \
             --env-file /home/core/fabmanager/config/env \
             -v /home/core/fabmanager/config/nginx:/etc/nginx/conf.d \
             -v /home/core/fabmanager/public/assets:/usr/src/app/public/assets \
             -v /home/core/fabmanager/public/uploads:/usr/src/app/public/uploads \
             -v /home/core/fabmanager/invoices:/usr/src/app/invoices \
             -v /home/core/fabmanager/log:/var/log/supervisor \
             sleede/fab-manager

Dockers utils

Restart app

docker restart fabmanager-app

Remove app

docker rm -f fabmanager-app

Open a bash in the app context

docker exec -it fabmanager-app bash