Google Compute Engine (Linux)

1terraform {
2  required_providers {
3    coder = {
4      source = "coder/coder"
5    }
6    google = {
7      source = "hashicorp/google"
8    }
9  }
10}
11
12provider "coder" {
13}
14
15variable "project_id" {
16  description = "Which Google Compute Project should your workspace live in?"
17}
18
19data "coder_parameter" "zone" {
20  name         = "zone"
21  display_name = "Zone"
22  description  = "Which zone should your workspace live in?"
23  type         = "string"
24  icon         = "/emojis/1f30e.png"
25  default      = "us-central1-a"
26  mutable      = false
27  option {
28    name  = "North America (Northeast)"
29    value = "northamerica-northeast1-a"
30    icon  = "/emojis/1f1fa-1f1f8.png"
31  }
32  option {
33    name  = "North America (Central)"
34    value = "us-central1-a"
35    icon  = "/emojis/1f1fa-1f1f8.png"
36  }
37  option {
38    name  = "North America (West)"
39    value = "us-west2-c"
40    icon  = "/emojis/1f1fa-1f1f8.png"
41  }
42  option {
43    name  = "Europe (West)"
44    value = "europe-west4-b"
45    icon  = "/emojis/1f1ea-1f1fa.png"
46  }
47  option {
48    name  = "South America (East)"
49    value = "southamerica-east1-a"
50    icon  = "/emojis/1f1e7-1f1f7.png"
51  }
52}
53
54provider "google" {
55  zone    = data.coder_parameter.zone.value
56  project = var.project_id
57}
58
59data "google_compute_default_service_account" "default" {
60}
61
62data "coder_workspace" "me" {
63}
64data "coder_workspace_owner" "me" {}
65
66resource "google_compute_disk" "root" {
67  name  = "coder-${data.coder_workspace.me.id}-root"
68  type  = "pd-ssd"
69  zone  = data.coder_parameter.zone.value
70  image = "debian-cloud/debian-11"
71  lifecycle {
72    ignore_changes = [name, image]
73  }
74}
75
76resource "coder_agent" "main" {
77  auth           = "google-instance-identity"
78  arch           = "amd64"
79  os             = "linux"
80  startup_script = <<-EOT
81    set -e
82
83    # install and start code-server
84    curl -fsSL https://code-server.dev/install.sh | sh -s -- --method=standalone --prefix=/tmp/code-server --version 4.11.0
85    /tmp/code-server/bin/code-server --auth none --port 13337 >/tmp/code-server.log 2>&1 &
86  EOT
87
88  metadata {
89    key          = "cpu"
90    display_name = "CPU Usage"
91    interval     = 5
92    timeout      = 5
93    script       = <<-EOT
94      #!/bin/bash
95      set -e
96      top -bn1 | grep "Cpu(s)" | awk '{print $2 + $4 "%"}'
97    EOT
98  }
99  metadata {
100    key          = "memory"
101    display_name = "Memory Usage"
102    interval     = 5
103    timeout      = 5
104    script       = <<-EOT
105      #!/bin/bash
106      set -e
107      free -m | awk 'NR==2{printf "%.2f%%\t", $3*100/$2 }'
108    EOT
109  }
110  metadata {
111    key          = "disk"
112    display_name = "Disk Usage"
113    interval     = 600 # every 10 minutes
114    timeout      = 30  # df can take a while on large filesystems
115    script       = <<-EOT
116      #!/bin/bash
117      set -e
118      df /home/coder | awk '$NF=="/"{printf "%s", $5}'
119    EOT
120  }
121}
122
123# code-server
124resource "coder_app" "code-server" {
125  agent_id     = coder_agent.main.id
126  slug         = "code-server"
127  display_name = "code-server"
128  icon         = "/icon/code.svg"
129  url          = "http://localhost:13337?folder=/home/coder"
130  subdomain    = false
131  share        = "owner"
132
133  healthcheck {
134    url       = "http://localhost:13337/healthz"
135    interval  = 3
136    threshold = 10
137  }
138}
139
140resource "google_compute_instance" "dev" {
141  zone         = data.coder_parameter.zone.value
142  count        = data.coder_workspace.me.start_count
143  name         = "coder-${lower(data.coder_workspace_owner.me.name)}-${lower(data.coder_workspace.me.name)}-root"
144  machine_type = "e2-medium"
145  network_interface {
146    network = "default"
147    access_config {
148      // Ephemeral public IP
149    }
150  }
151  boot_disk {
152    auto_delete = false
153    source      = google_compute_disk.root.name
154  }
155  service_account {
156    email  = data.google_compute_default_service_account.default.email
157    scopes = ["cloud-platform"]
158  }
159  # The startup script runs as root with no $HOME environment set up, so instead of directly
160  # running the agent init script, create a user (with a homedir, default shell and sudo
161  # permissions) and execute the init script as that user.
162  metadata_startup_script = <<EOMETA
163#!/usr/bin/env sh
164set -eux
165
166# If user does not exist, create it and set up passwordless sudo
167if ! id -u "${local.linux_user}" >/dev/null 2>&1; then
168  useradd -m -s /bin/bash "${local.linux_user}"
169  echo "${local.linux_user} ALL=(ALL) NOPASSWD:ALL" > /etc/sudoers.d/coder-user
170fi
171
172exec sudo -u "${local.linux_user}" sh -c '${coder_agent.main.init_script}'
173EOMETA
174}
175
176locals {
177  # Ensure Coder username is a valid Linux username
178  linux_user = lower(substr(data.coder_workspace_owner.me.name, 0, 32))
179}
180
181resource "coder_metadata" "workspace_info" {
182  count       = data.coder_workspace.me.start_count
183  resource_id = google_compute_instance.dev[0].id
184
185  item {
186    key   = "type"
187    value = google_compute_instance.dev[0].machine_type
188  }
189}
190
191resource "coder_metadata" "home_info" {
192  resource_id = google_compute_disk.root.id
193
194  item {
195    key   = "size"
196    value = "${google_compute_disk.root.size} GiB"
197  }
198}
199