feat(Linode): add new template for Linode

registry/coder/templates/linode/README.md

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+---
+display_name: Linode
+description: Provision Linode instaces as Coder workspaces
+icon: ../../../../.icons/docker.svg
+maintainer_github: coder
+verified: true
+tags: [linode, vps]
+---
+
+# Remote Development on Linode compute
+
+Provision Linode instances as [Coder workspaces](https://coder.com/docs/workspaces) with this example template.
+
+<!-- TODO: Add screenshot -->
+
+## Prerequisites
+
+Linode Token - Grab this from their website after logging in. <!-- Expand on this, I don't have a Linode account. -->

registry/coder/templates/linode/main.tf

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+terraform {
+  required_providers {
+    coder = {
+      source = "coder/coder"
+    }
+    linode = {
+      source  = "linode/linode"
+    }
+  }
+}
+
+locals {
+  username = data.coder_workspace_owner.me.name
+}
+
+variable "linode_token" {
+  type = string
+  description = "Your Linode Token"
+  default = "null"
+}
+
+variable "region" {
+  type = string
+  description = "Where do you want your linode instance to be hosted?"
+  default = "us-central"
+}
+
+provider "linode" {
+  token = var.linode_token
+}
+
+data "coder_provisioner" "me" {}
+data "coder_workspace" "me" {}
+data "coder_workspace_owner" "me" {}
+
+resource "linode_instance" "main" {
+  region = data.coder_parameter.region.value
+  label = "linode-${data.coder_workspace.me.id}-home" 
+  type = data.coder_parameter.type.value
+}
+
+resource "linode_instance_disk" "boot" {
+  label = "boot"
+  linode_id = linode_instance.main.id
+  size = tostring(data.coder_parameter.storage_size)
+  # this is making me aggrovated, I can't figure out how to convert this value gathered later on (in create workspace vs. import template) to a string so TF will accept it.
+  filesystem = "ext4"
+}
+
+data "coder_parameter" "region" {
+  name         = "region"
+  display_name = "Region"
+  description  = "This is the region where your workspace will be created."
+  type         = "string"
+  default      = "us-central"
+  mutable      = false
+  option {
+    name  = "Dallas, TX"
+    value = "us-central"
+  }
+  option {
+    name  = "Fremont, CA"
+    value = "us-west"
+  }
+  option {
+    name  = "Atlanta, GA"
+    value = "us-southeast"
+  }
+  option {
+    name = "Newark, NJ"
+    value= "us-east"
+  }
+}
+
+data "coder_parameter" "type" {
+  name = "type"
+  display_name = "Instance Type"
+  type = "string"
+  default = "g6-standard-2"
+  # Linode documentation does not specify a list of types, so I'm not sure what to put here. I'm not currently a Linode customer.
+}
+
+data "coder_parameter" "storage_size" {
+  name = "storage_size"
+  display_name = "Storage Size"
+  type = "number"
+  default = "25"
+}
+
+resource "coder_agent" "main" {
+  arch           = data.coder_provisioner.me.arch
+  os             = "linux"
+  startup_script = <<-EOT
+    set -e
+
+    # Prepare user home with default files on first start.
+    if [ ! -f ~/.init_done ]; then
+      cp -rT /etc/skel ~
+      touch ~/.init_done
+    fi
+
+    # Add any commands that should be executed at workspace startup (e.g install requirements, start a program, etc) here
+  EOT
+
+  # These environment variables allow you to make Git commits right away after creating a
+  # workspace. Note that they take precedence over configuration defined in ~/.gitconfig!
+  # You can remove this block if you'd prefer to configure Git manually or using
+  # dotfiles. (see docs/dotfiles.md)
+  env = {
+    GIT_AUTHOR_NAME     = coalesce(data.coder_workspace_owner.me.full_name, data.coder_workspace_owner.me.name)
+    GIT_AUTHOR_EMAIL    = "${data.coder_workspace_owner.me.email}"
+    GIT_COMMITTER_NAME  = coalesce(data.coder_workspace_owner.me.full_name, data.coder_workspace_owner.me.name)
+    GIT_COMMITTER_EMAIL = "${data.coder_workspace_owner.me.email}"
+  }
+
+  # The following metadata blocks are optional. They are used to display
+  # information about your workspace in the dashboard. You can remove them
+  # if you don't want to display any information.
+  # For basic resources, you can use the `coder stat` command.
+  # If you need more control, you can write your own script.
+  metadata {
+    display_name = "CPU Usage"
+    key          = "0_cpu_usage"
+    script       = "coder stat cpu"
+    interval     = 10
+    timeout      = 1
+  }
+
+  metadata {
+    display_name = "RAM Usage"
+    key          = "1_ram_usage"
+    script       = "coder stat mem"
+    interval     = 10
+    timeout      = 1
+  }
+
+  metadata {
+    display_name = "Home Disk"
+    key          = "3_home_disk"
+    script       = "coder stat disk --path $${HOME}"
+    interval     = 60
+    timeout      = 1
+  }
+
+  metadata {
+    display_name = "CPU Usage (Host)"
+    key          = "4_cpu_usage_host"
+    script       = "coder stat cpu --host"
+    interval     = 10
+    timeout      = 1
+  }
+
+  metadata {
+    display_name = "Memory Usage (Host)"
+    key          = "5_mem_usage_host"
+    script       = "coder stat mem --host"
+    interval     = 10
+    timeout      = 1
+  }
+
+  metadata {
+    display_name = "Load Average (Host)"
+    key          = "6_load_host"
+    # get load avg scaled by number of cores
+    script   = <<EOT
+      echo "`cat /proc/loadavg | awk '{ print $1 }'` `nproc`" | awk '{ printf "%0.2f", $1/$2 }'
+    EOT
+    interval = 60
+    timeout  = 1
+  }
+
+  metadata {
+    display_name = "Swap Usage (Host)"
+    key          = "7_swap_host"
+    script       = <<EOT
+      free -b | awk '/^Swap/ { printf("%.1f/%.1f", $3/1024.0/1024.0/1024.0, $2/1024.0/1024.0/1024.0) }'
+    EOT
+    interval     = 10
+    timeout      = 1
+  }
+}
+
+# See https://registry.coder.com/modules/coder/code-server
+module "code-server" {
+  count  = data.coder_workspace.me.start_count
+  source = "registry.coder.com/coder/code-server/coder"
+
+  # This ensures that the latest non-breaking version of the module gets downloaded, you can also pin the module version to prevent breaking changes in production.
+  version = "~> 1.0"
+
+  agent_id = coder_agent.main.id
+  order    = 1
+}