template.tf

terraform {
  required_providers {
    coder = {
      source = "coder/coder"
    }
  }
}

provider "local" {}

locals {
  username = data.coder_workspace.me.owner
}


resource "null_resource" "systemd_service" {
	count = "${data.coder_workspace.me.start_count}"
  provisioner "local-exec" {
    command = <<-EOT
      #!/bin/bash
			mkdir -p ~/.config/systemd/user/
			cat <<EOF > ~/.config/systemd/user/coder.service
			[Unit]
			Description=Coder
			After=network.target

			[Service]
			Type=simple
			ExecStart=/usr/bin/coder agent
			Restart=always
			RestartSec=3
			Environment="CODER_AGENT_TOKEN=${coder_agent.main.token}"
			Environment="CODER_AGENT_URL=${data.coder_workspace.me.access_url}"
			Environment="CODER_AGENT_AUTH=token"

			[Install]
			WantedBy=default.target
EOF

			systemctl --user daemon-reload
			systemctl --user start coder.service
			EOT

    interpreter = ["bash", "-c"]
  }
}

resource "null_resource" "stop_systemd_service" {
	count = "${data.coder_workspace.me.start_count}" == 0 ? 1 : 0
	# This resource runs only during Terraform destroy
  provisioner "local-exec" {
    command = "systemctl --user stop coder.service"
  }
}


data "coder_provisioner" "me" {
}

data "coder_workspace" "me" {
}




resource "coder_agent" "main" {
  arch           = data.coder_provisioner.me.arch
  os             = "linux"
  startup_script = <<-EOT
    set -e

    # install and start code-server
    curl -fsSL https://code-server.dev/install.sh | sh -s -- --method=standalone --prefix=/tmp/code-server --version 4.19.1
    /tmp/code-server/bin/code-server --auth none --port 13337 >/tmp/code-server.log 2>&1 &
  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.me.owner_name, data.coder_workspace.me.owner)
    GIT_AUTHOR_EMAIL    = "${data.coder_workspace.me.owner_email}"
    GIT_COMMITTER_NAME  = coalesce(data.coder_workspace.me.owner_name, data.coder_workspace.me.owner)
    GIT_COMMITTER_EMAIL = "${data.coder_workspace.me.owner_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
  }
}

resource "coder_app" "code-server" {
  agent_id     = coder_agent.main.id
  slug         = "code-server"
  display_name = "code-server"
  url          = "http://localhost:13337/?folder=/home/${local.username}"
  icon         = "/icon/code.svg"
  subdomain    = false
  share        = "owner"

  healthcheck {
    url       = "http://localhost:13337/healthz"
    interval  = 5
    threshold = 6
  }
}