coder · ntimo · Apr 15, 2022 · Jun 9, 2022 · Jun 9, 2022 · Jun 9, 2022
diff --git a/examples/hetzner-linux/README.md b/examples/hetzner-linux/README.md
@@ -0,0 +1,5 @@
+---
+name: Develop in Linux on Hetzner Cloud
+description: Get started with Linux development on Hetzner Cloud.
+tags: [cloud, hetzner]
+---
diff --git a/examples/hetzner-linux/cloud-config.yaml.tftpl b/examples/hetzner-linux/cloud-config.yaml.tftpl
@@ -0,0 +1,72 @@
+#cloud-config
+users:
+  - name: ${username}
+    sudo: ["ALL=(ALL) NOPASSWD:ALL"]
+    groups: sudo
+    shell: /bin/bash
+packages:
+  - git
+  - curl
+  - jq
+mounts:
+  - [
+      "${volume_path}",
+      "/home/${username}",
+      ext4,
+      "discard,defaults",
+    ]
+write_files:
+  - path: /opt/coder/init
+    permissions: "0755"
+    encoding: b64
+    content: ${init_script}
+  - path: /etc/systemd/system/coder-agent.service
+    permissions: "0644"
+    content: |
+      [Unit]
+      Description=Coder Agent
+      After=network-online.target
+      Wants=network-online.target
+
+      [Service]
+      User=${username}
+      ExecStart=/opt/coder/init
+      Environment=CODER_AGENT_TOKEN=${coder_agent_token}
+      Restart=always
+      RestartSec=10
+      TimeoutStopSec=90
+      KillMode=process
+
+      OOMScoreAdjust=-900
+      SyslogIdentifier=coder-agent
+
+      [Install]
+      WantedBy=multi-user.target
+%{ if code_server_setup ~}
+  - path: /tmp/install_code_server.sh
+    permissions: "0777"
+    content: |
+      #!/bin/bash
+      CODE_SERVER_DOWNLOAD_URL=$(curl -sL https://api.github.com/repos/coder/code-server/releases/latest | jq -r '.assets[].browser_download_url' | grep "amd64.deb")
+      curl -fL $CODE_SERVER_DOWNLOAD_URL -o /tmp/code_server.deb
+      dpkg -i /tmp/code_server.deb
+      systemctl enable --now code-server@${username}
+      rm /tmp/code_server.deb
+  - path: /tmp/install_code_server.sh
+    permissions: "0777"
+    content: |
+  - path: /home/${username}/.config/code-server/config.yaml
+    permissions: "0644"
+    content: |
+      bind-addr: 127.0.0.1:8080
+      auth: none
+      cert: false
+%{ endif ~}
+runcmd:
+  - chown ${username}:${username} /home/${username}
+  - systemctl enable coder-agent
+  - systemctl start coder-agent
+%{ if code_server_setup ~}
+  - /tmp/install_code_server.sh
+  - rm /tmp/install_code_server.sh
+%{ endif }
diff --git a/examples/hetzner-linux/main.tf b/examples/hetzner-linux/main.tf
@@ -0,0 +1,151 @@
+terraform {
+  required_providers {
+    coder = {
+      source  = "coder/coder"
+      version = "0.4.2"
+    }
+    hcloud = {
+      source  = "hetznercloud/hcloud"
+      version = "1.33.2"
+    }
+  }
+}
+
+provider "hcloud" {
+  token = var.hcloud_token
+}
+
+provider "coder" {
+}
+
+variable "hcloud_token" {
+  description = <<EOF
+Coder requires a Hetzner Cloud token to provision workspaces.
+EOF
+  sensitive   = true
+  validation {
+    condition     = length(var.hcloud_token) == 64
+    error_message = "Please provide a valid Hetzner Cloud API token."
+  }
+}
+
+variable "instance_location" {
+  description = "What region should your workspace live in?"
+  default     = "nbg1"
+  validation {
+    condition     = contains(["nbg1", "fsn1", "hel1"], var.instance_location)
+    error_message = "Invalid zone!"
+  }
+}
+
+variable "instance_type" {
+  description = "What instance type should your workspace use?"
+  default     = "cx11"
+  validation {
+    condition     = contains(["cx11", "cx21", "cx31", "cx41", "cx51"], var.instance_type)
+    error_message = "Invalid instance type!"
+  }
+}
+
+variable "instance_os" {
+  description = "Which operating system should your workspace use?"
+  default     = "ubuntu-20.04"
+  validation {
+    condition     = contains(["ubuntu-22.04","ubuntu-20.04", "ubuntu-18.04", "debian-11", "debian-10"], var.instance_os)
+    error_message = "Invalid OS!"
+  }
+}
+
+variable "volume_size" {
+  description = "How much storage space do you need?"
+  default     = "50"
+  validation {
+    condition     = contains(["50","100","150"], var.volume_size)
+    error_message = "Invalid volume size!"
+  }
+}
+
+variable "code_server" {
+  description = "Should Code Server be installed?"
+  default     = "true"
+  validation {
+    condition     = contains(["true","false"], var.code_server)
+    error_message = "Your answer can only be yes or no!"
+  }
+}
+
+data "coder_workspace" "me" {
+}
+
+resource "coder_agent" "dev" {
+  arch = "amd64"
+  os   = "linux"
+}
+
+resource "coder_app" "code-server" {
+  count         = var.code_server ? 1 : 0
+  agent_id      = coder_agent.dev.id
+  name          = "code-server"
+  icon          = "https://cdn.icon-icons.com/icons2/2107/PNG/512/file_type_vscode_icon_130084.png"
+  url           = "http://localhost:8080"
+  relative_path = true
+}
+
+# Generate a dummy ssh key that is not accessible so Hetzner cloud does not spam the admin with emails.
+resource "tls_private_key" "rsa_4096" {
+  algorithm = "RSA"
+  rsa_bits  = 4096
+}
+
+resource "hcloud_ssh_key" "root" {
+  name       = "coder-${data.coder_workspace.me.owner}-${data.coder_workspace.me.name}-root"
+  public_key = tls_private_key.rsa_4096.public_key_openssh
+}
+
+resource "hcloud_server" "root" {
+  count       = data.coder_workspace.me.start_count
+  name        = "coder-${data.coder_workspace.me.owner}-${data.coder_workspace.me.name}-root"
+  server_type = var.instance_type
+  location    = var.instance_location
+  image       = var.instance_os
+  ssh_keys    = [hcloud_ssh_key.root.id]
+  user_data   = templatefile("cloud-config.yaml.tftpl", {
+    username          = data.coder_workspace.me.owner
+    volume_path       = "/dev/disk/by-id/scsi-0HC_Volume_${hcloud_volume.root.id}"
+    init_script       = base64encode(coder_agent.dev.init_script)
+    coder_agent_token = coder_agent.dev.token
+    code_server_setup = var.code_server
+  })
+}
+
+resource "hcloud_volume" "root" {
+  name         = "coder-${data.coder_workspace.me.owner}-${data.coder_workspace.me.name}-root"
+  size         = var.volume_size
+  format       = "ext4"
+  location     = var.instance_location
+}
+
+resource "hcloud_volume_attachment" "root" {
+  count     = data.coder_workspace.me.start_count
+  volume_id = hcloud_volume.root.id
+  server_id = hcloud_server.root[count.index].id
+  automount = false
+}
+
+resource "hcloud_firewall" "root" {
+  name = "coder-${data.coder_workspace.me.owner}-${data.coder_workspace.me.name}-root"
+  rule {
+    direction = "in"
+    protocol  = "icmp"
+    source_ips = [
+      "0.0.0.0/0",
+      "::/0"
+    ]
+  }
+}
+
+resource "hcloud_firewall_attachment" "root_fw_attach" {
+    count = data.coder_workspace.me.start_count
+    firewall_id = hcloud_firewall.root.id
+    server_ids  = [hcloud_server.root[count.index].id]
+}