Chris2pi Posts - Answer Overflow

Chris2pi

•Created by Chris2pi on 1/8/2025 in #help

Persistent AWS EBS/EC2 home directory

Problem—When I click restart in the coder web GUI, it recreates my workspace and causes the EBS volume to be recreated, causing me to lose all of the data. I understand why that is as a terraform recreate is happening. So, before I go down the rabbit hole of making custom scripts, etc., I just wanted to see if there was an out-of-the-box method from the coder. I found this doco - https://coder.com/docs/admin/templates/extending-templates/resource-persistence But it doesn't seem right for what I want. Napkin-style plan for what I think should happen - The user hits restart. Recreation happens, but the EBS is detached from the instance. A new instance spins up and attaches the EBS again. Source code based on this template - https://github.com/coder/coder/blob/main/examples/templates/aws-linux/main.tf

resource "aws_instance" "dev" {
  ami               = data.aws_ami.ubuntu.id
  availability_zone = "${data.coder_parameter.region.value}a"
  instance_type     = data.coder_parameter.instance_type.value
  subnet_id         = "subnet-xxxxxxxxxxxxxxxx"
  associate_public_ip_address = true

  user_data = data.cloudinit_config.user_data.rendered

    # Define the root volume storage
  root_block_device {
    volume_type           = "gp3"  # You can choose gp2, gp3, io1, etc.
    volume_size           = data.coder_parameter.disk_space.value     # Specify the volume size in GB
    encrypted             = true   # Encrypt the volume
    delete_on_termination = true
  }

  tags = {
    Name = "coder-${data.coder_workspace_owner.me.name}-${data.coder_workspace.me.name}"
    # Required if you are using our example policy, see template README
    Coder_Provisioned = "true"
  }
  lifecycle {
    ignore_changes = [ami]
  }
}

resource "aws_instance" "dev" {
  ami               = data.aws_ami.ubuntu.id
  availability_zone = "${data.coder_parameter.region.value}a"
  instance_type     = data.coder_parameter.instance_type.value
  subnet_id         = "subnet-xxxxxxxxxxxxxxxx"
  associate_public_ip_address = true

  user_data = data.cloudinit_config.user_data.rendered

    # Define the root volume storage
  root_block_device {
    volume_type           = "gp3"  # You can choose gp2, gp3, io1, etc.
    volume_size           = data.coder_parameter.disk_space.value     # Specify the volume size in GB
    encrypted             = true   # Encrypt the volume
    delete_on_termination = true
  }

  tags = {
    Name = "coder-${data.coder_workspace_owner.me.name}-${data.coder_workspace.me.name}"
    # Required if you are using our example policy, see template README
    Coder_Provisioned = "true"
  }
  lifecycle {
    ignore_changes = [ami]
  }
}

7 replies

CCoder.com

•Created by Chris2pi on 11/24/2024 in #help

Creating a JupyterLab instance

It might be simple, but I can't get a JupyterLab instance going. The goal is to spin up an AWS EC2 instance. I can do that with VSCode without issue. I add the module from here but get a few errors on launch - https://registry.coder.com/modules/jupyterlab Then I see this doco and it seems to be what the module is meant to do? https://coder.com/docs/admin/templates/extending-templates/web-ides#jupyterlab Can't get that working either. I suspect I am confusing the above doco and just using the module incorrectly and mixing it with the vscode out of the box template. Code below

resource "coder_agent" "main" {
  os   = "linux"
  arch = "amd64"
  dir  = "/home/coder"

  startup_script = <<-EOT
    set -e

    pip3 install jupyterlab

    # install and start JupyterLab
    ~/.local/bin/jupyter lab --ServerApp.base_url=/@${data.coder_workspace_owner.me.name}/${data.coder_workspace.me.name}/apps/jupyter --ServerApp.token='' --ip='*'
  EOT
}

module "jupyterlab" {
  source   = "registry.coder.com/modules/jupyterlab/coder"
  version  = "1.0.23"
  agent_id = coder_agent.main.id
}

locals {
  linux_user = "coder"
  user_data  = <<-EOT
  Content-Type: multipart/mixed; boundary="//"
  MIME-Version: 1.0

  --//
  Content-Type: text/cloud-config; charset="us-ascii"
  MIME-Version: 1.0
  Content-Transfer-Encoding: 7bit
  Content-Disposition: attachment; filename="cloud-config.txt"

  #cloud-config
  cloud_final_modules:
  - [scripts-user, always]
  hostname: ${lower(data.coder_workspace.me.name)}
  users:
  - name: ${local.linux_user}
    sudo: ALL=(ALL) NOPASSWD:ALL
    shell: /bin/bash

  --//
  Content-Type: text/x-shellscript; charset="us-ascii"
  MIME-Version: 1.0
  Content-Transfer-Encoding: 7bit
  Content-Disposition: attachment; filename="userdata.txt"

  #!/bin/bash
  sudo -u ${local.linux_user} sh -c '${try(coder_agent.main.init_script, "")}'
  --//--
  EOT
}

resource "coder_agent" "main" {
  os   = "linux"
  arch = "amd64"
  dir  = "/home/coder"

  startup_script = <<-EOT
    set -e

    pip3 install jupyterlab

    # install and start JupyterLab
    ~/.local/bin/jupyter lab --ServerApp.base_url=/@${data.coder_workspace_owner.me.name}/${data.coder_workspace.me.name}/apps/jupyter --ServerApp.token='' --ip='*'
  EOT
}

module "jupyterlab" {
  source   = "registry.coder.com/modules/jupyterlab/coder"
  version  = "1.0.23"
  agent_id = coder_agent.main.id
}

locals {
  linux_user = "coder"
  user_data  = <<-EOT
  Content-Type: multipart/mixed; boundary="//"
  MIME-Version: 1.0

  --//
  Content-Type: text/cloud-config; charset="us-ascii"
  MIME-Version: 1.0
  Content-Transfer-Encoding: 7bit
  Content-Disposition: attachment; filename="cloud-config.txt"

  #cloud-config
  cloud_final_modules:
  - [scripts-user, always]
  hostname: ${lower(data.coder_workspace.me.name)}
  users:
  - name: ${local.linux_user}
    sudo: ALL=(ALL) NOPASSWD:ALL
    shell: /bin/bash

  --//
  Content-Type: text/x-shellscript; charset="us-ascii"
  MIME-Version: 1.0
  Content-Transfer-Encoding: 7bit
  Content-Disposition: attachment; filename="userdata.txt"

  #!/bin/bash
  sudo -u ${local.linux_user} sh -c '${try(coder_agent.main.init_script, "")}'
  --//--
  EOT
}

Overall a end to end template would be nice. Happy to put one together once I understand it better.

7 replies

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