Synapse on Kubernetes

Make an Synapse/Matrix server work on a managed kubernetes server hosted by OVH

Prerequisites

an account in OVH hosting provider and its credentials (application key, application secret, consumer secret and endpoint)
to store Terraform state files : an S3 object storage with the credentials to connect to (access key, secret key, endpoint and region)
a valid domain name to reach the future synapse homeserver

Create a local.env.sh file copying the script/local.env.template.sh file and fill it with all the environment variables values needed.

Then source this file :
```
source local.env.sh
```
Generate a terraform.tfvars file based on values previouly set :
```
sh scripts/generate_tfvars_file.sh
```
Initialize the Terraform workspace
```
terraform init
```
Create the Terraform execution plan to validate that everything is ok
```
terraform plan
```
Apply the Terraform plan
```
terraform apply
```

This will lead to the creation of a kubernetes cluster with:

1 control plane node
2 workers nodes the kubeconfig file needed to connect to the cluster can be generated with :

sh scripts/generate_kubeconfig_file.sh

The configuration part will be done with Ansible and is quite independant from the provisioning part.
For this you just have to execute :

sh scripts/ansible_configuration.sh