init

template/docker/README.md

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+---
+name: Develop in Docker
+description: Develop inside Docker containers using your local daemon
+tags: [local, docker]
+icon: /icon/docker.png
+---
+
+# docker
+
+To get started, run `coder templates init`. When prompted, select this template.
+Follow the on-screen instructions to proceed.
+
+## Editing the image
+
+Edit the `Dockerfile` and run `coder templates push` to update workspaces.
+
+## code-server
+
+`code-server` is installed via the `startup_script` argument in the `coder_agent`
+resource block. The `coder_app` resource is defined to access `code-server` through
+the dashboard UI over `localhost:13337`.
+
+## Extending this template
+
+See the [kreuzwerker/docker](https://registry.terraform.io/providers/kreuzwerker/docker) Terraform provider documentation to
+add the following features to your Coder template:
+
+- SSH/TCP docker host
+- Registry authentication
+- Build args
+- Volume mounts
+- Custom container spec
+- More
+
+We also welcome contributions!

template/docker/build/Dockerfile

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+FROM ubuntu
+
+RUN apt-get update \
+	&& apt-get install -y \
+	curl \
+	git \
+	golang \
+	sudo \
+	vim \
+	wget \
+	&& rm -rf /var/lib/apt/lists/*
+
+ARG USER=coder
+RUN useradd --groups sudo --no-create-home --shell /bin/bash ${USER} \
+	&& echo "${USER} ALL=(ALL) NOPASSWD:ALL" >/etc/sudoers.d/${USER} \
+	&& chmod 0440 /etc/sudoers.d/${USER}
+USER ${USER}
+WORKDIR /home/${USER}

template/docker/main.tf

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+terraform {
+  required_providers {
+    coder = {
+      source  = "coder/coder"
+      version = "~> 0.8.3"
+    }
+    docker = {
+      source  = "kreuzwerker/docker"
+      version = "~> 3.0.1"
+    }
+  }
+}
+
+locals {
+  username = data.coder_workspace.me.owner
+}
+
+data "coder_provisioner" "me" {
+}
+
+provider "docker" {
+}
+
+data "coder_workspace" "me" {
+}
+
+resource "coder_agent" "main" {
+  arch                   = data.coder_provisioner.me.arch
+  os                     = "linux"
+  startup_script_timeout = 180
+  startup_script         = <<-EOT
+    set -e
+
+    # install and start code-server
+    curl -fsSL https://ghproxy.com/https://raw.githubusercontent.com/cdr/code-server/main/install.sh | sh -s -- --method=standalone --prefix=/tmp/code-server --version 4.11.0
+    /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     = "${data.coder_workspace.me.owner}"
+    GIT_COMMITTER_NAME  = "${data.coder_workspace.me.owner}"
+    GIT_AUTHOR_EMAIL    = "${data.coder_workspace.me.owner_email}"
+    GIT_COMMITTER_EMAIL = "${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
+  }
+}
+
+resource "docker_volume" "home_volume" {
+  name = "coder-${data.coder_workspace.me.id}-home"
+  # Protect the volume from being deleted due to changes in attributes.
+  lifecycle {
+    ignore_changes = all
+  }
+  # Add labels in Docker to keep track of orphan resources.
+  labels {
+    label = "coder.owner"
+    value = data.coder_workspace.me.owner
+  }
+  labels {
+    label = "coder.owner_id"
+    value = data.coder_workspace.me.owner_id
+  }
+  labels {
+    label = "coder.workspace_id"
+    value = data.coder_workspace.me.id
+  }
+  # This field becomes outdated if the workspace is renamed but can
+  # be useful for debugging or cleaning out dangling volumes.
+  labels {
+    label = "coder.workspace_name_at_creation"
+    value = data.coder_workspace.me.name
+  }
+}
+
+resource "docker_image" "main" {
+  name = "coder-${data.coder_workspace.me.id}"
+  build {
+    context = "./build"
+    build_args = {
+      USER = local.username
+    }
+  }
+  triggers = {
+    dir_sha1 = sha1(join("", [for f in fileset(path.module, "build/*") : filesha1(f)]))
+  }
+}
+
+resource "docker_container" "workspace" {
+  count = data.coder_workspace.me.start_count
+  image = docker_image.main.name
+  # Uses lower() to avoid Docker restriction on container names.
+  name = "coder-${data.coder_workspace.me.owner}-${lower(data.coder_workspace.me.name)}"
+  # Hostname makes the shell more user friendly: coder@my-workspace:~$
+  hostname = data.coder_workspace.me.name
+  # Use the docker gateway if the access URL is 127.0.0.1
+  entrypoint = ["sh", "-c", replace(coder_agent.main.init_script, "/localhost|127\\.0\\.0\\.1/", "host.docker.internal")]
+  env        = ["CODER_AGENT_TOKEN=${coder_agent.main.token}"]
+  host {
+    host = "host.docker.internal"
+    ip   = "host-gateway"
+  }
+  volumes {
+    container_path = "/home/${local.username}"
+    volume_name    = docker_volume.home_volume.name
+    read_only      = false
+  }
+  # Add labels in Docker to keep track of orphan resources.
+  labels {
+    label = "coder.owner"
+    value = data.coder_workspace.me.owner
+  }
+  labels {
+    label = "coder.owner_id"
+    value = data.coder_workspace.me.owner_id
+  }
+  labels {
+    label = "coder.workspace_id"
+    value = data.coder_workspace.me.id
+  }
+  labels {
+    label = "coder.workspace_name"
+    value = data.coder_workspace.me.name
+  }
+}