This is simple example of how to build HA web cluster in Terraform with UpCloud provider. In this example we create web cluster with WWW servers, NFS server and DBaaS.
Project uses Terraform and should be installed. We're also using UpCloud's Terraform provider, but it should be automatically installed by running terraform init.
To create the resources with Terraform, you'll need your API credentials exported.
export UPCLOUD_USERNAME=your_username
export UPCLOUD_PASSWORD=your_password
You must also create config.tfvars file with your own settings:
zone = "pl-waw1"
www_plan = "1xCPU-1GB"
nas_plan = "4xCPU-8GB"
dbaas_plan = "2x2xCPU-4GB-50GB"
redis_plan = "2x2xCPU-8GB"
lbaas_plan = "production-small"
nas_network = "10.20.0.0/24"
lb_network = "10.20.10.0/24"
ssh_key_public = "ssh-rsa AAAA_YOUR_SSH_PUBLIC_KEY"
IMPORTANT: Make sure your SSH-agent is running (execute this if not: eval$(ssh-agent) && ssh-add <path_to_private_key> && ssh-add -L), so Terraform scripts can SSH into VMs using agent forwarding
Initiate the project and install providers.
make init
Demo can now be created with Terraform. Creation takes around 10-15 minutes.
make create
After the setup has been created Terraform will output DBaaS service credentials, IP address of bastion host and LBaaS service hostname.
Simple test is to use curl or browser to access LBaaS hostname to see phpinfo() of WWW servers.
You can use bastion host as jump host to log in to other servers via Utility network using SSH key.
$ ssh -A -lroot <bastion_host>
root@jumphost-server:~# ssh <Utility network IP address of WWW or NFS server> -lroot
You can test your Web application by uploading it to DocumentRoot in one of WWW server or to NFS server and test it with DBaaS services.
After testing things its good to free the resources. Tearing the thing down is also just one command.
make destroy