Gitlab HA setup template on AWS

This template is a POC to setup a Gitlab system with High Availability on Amazon Web Service Cloud.

This template is heavily inspired by Gitlab university : HA on AWS.

The project tries to follow Immutable server pattern and Infrastructure-as-Code principles by using :

Packer to create Amazon Virtual Machine Images (AMI)
Ansible to install and configure packages on these Virtual Machine Images when running Packer
Terraform to create and orchestrate the cloud infrastructure
cloud-init and jinja2-cli to finalize setup automatically when launching AWS instances from AMI
Docker to run Continuous Integration in containers with Gitlab-CI

Requirements

a AWS account (Be careful this template implies creating billable resources on AWS cloud)

You will need an AWS access key and enough admin permissions to create AWS ressources
a AWS Route 53 DNS zone already created (the template will add new subdomain DNS A records)
a SSH Key pair to connect to Gitlab and AWS instances (see Github help for examples)
Packer >= 0.12
Terraform >= 8.2
GNU Make or some Unix equivalent Implementation
(optional) Graphiz to generate Terraform config Graph Images
```
# on ubuntu/debian
sudo apt-get install graphviz
```

git clone --recursive https://github.com/csanquer/gitlab-setup.git

terraform : terraform/terraform.dist.tfvars to terraform/terraform.tfvars
packer : packer/config.dist.json to packer/config.json

make ami

make plan

if terraform plan is correct, create AWS resources by applying the terraform plan

make apply

you can also get Graphviz graphs of all terraform config

# in PNG image format
make graphs
# or in SVG
make graphs format=svg

After creation, wait for a few minutes the autoscaled gitlab instances finish self initialization.

if variables are set in terraform/terraform.tvars like :

aws_dns_zone = "my-aws.net"
gitlab_dns_subdomain = "gitlab"

The Gitlab server should be available to http://gitlab.my-aws.net/

make destroy