Solidblocks Hetzner

After years of shifting workloads to the big cloud providers like AWS or Azure, I am now more often confronted with situations where the deployed cloud infrastructures become unmanageable cost and complexity wise. A nice, fast and inexpensive alternative for smaller projects is the Hetzner Cloud featuring all basic needed building blocks like VMs, block devices, networking, firewalls and load-balancers. One major drawback with Hetzner is though, that there is no pendant to the AWS RDS service family, meaning we have to start to self-manage our state (and backups) again. For not too complex setups, building up on the previously released Solidblocks RDS component, Solidblocks now comes with a Terraform module for Hetzner clouds, providing a fully fledged PostreSQL database with automatic backup and restore capabilities. For more details please visit the documentation or have a quick look at the example below, showcasing the most important features.

main.tf

resource "aws_s3_bucket" "backup" {
    bucket        = "test-rds-postgresql-backup"
    force_destroy = true
}

resource hcloud_volume "data" {
    name     = "rds-postgresql"
    size     = 32
    format   = "ext4"
    location = var.hetzner_location
}

resource "tls_private_key" "ssh_key" {
    algorithm = "RSA"
    rsa_bits  = 4096
}

resource "hcloud_ssh_key" "ssh_key" {
    name       = "rds-postgresql"
    public_key = tls_private_key.ssh_key.public_key_openssh
}

module "rds-postgresql" {
    source = "github.com/pellepelster/solidblocks//solidblocks-hetzner/modules/rds-postgresql"
    
    name     = "rds-postgresql"
    location = var.hetzner_location
    
    ssh_keys = [hcloud_ssh_key.ssh_key.id]
    
    data_volume = hcloud_volume.data.id
    
    backup_s3_bucket     = aws_s3_bucket.backup.id
    backup_s3_access_key = var.backup_s3_access_key
    backup_s3_secret_key = var.backup_s3_secret_key
}

variables.tf

variable "hetzner_location" {
  default = "nbg1"
}

variable "aws_region" {
  default = "eu-central-1"
}


variable "backup_s3_access_key" {
  type = string
}

variable "backup_s3_secret_key" {
  type = string
}

hetzner solidblocks