Develop code using a local VS Code editor

Learn how to open an SSH tunnel from your local machine to a workstation, and then use VS Code Remote Development support to connect to Cloud Workstations from your local VS Code editor.

Before you begin

Before you begin, make sure that you follow the steps for these tasks:

Make sure that someone on your team has created a workstation configuration.
Create and start your workstation.
While you're in the Google Cloud console, copy the following information:
1. Project name and ID: click the project name in the Google Cloud menu bar and copy the ID in the Project name and ID dialog that opens.
2. Region
3. Cluster name
4. Configuration name
From your local machine, install the gcloud CLI.

If you're running gcloud CLI for the first time, you may also need to run gcloud auth login to obtain credentials and gcloud config set project PROJECT_ID to set your current project to the project ID you copied in the previous step.
When using ssh for the first time, install a remote SSH extension so you can connect to a workstation from the VS Code editor through the Extension Marketplace or through the command palette.
Extension Marketplace
1. Open your local VS Code editor application and then open the Extension Marketplace by selecting
  Extensions in the Activity bar.
2. Click Install to install the Remote - SSH extension.
3. Enter remote ssh in the search field, which opens the extension page for Remote - SSH.
Command palette
1. To open the command palette, press Control+Shift+P (or Command+Shift+P on macOS), or click View > Command Palette.
2. Enter ext install ms-vscode-remote.remote-ssh to install the extension.

Open an SSH tunnel

Open an SSH tunnel from your local machine to a workstation using the gcloud workstations start-tcp-tunnel command:

In the Google Cloud console, go to the Cloud Workstations > Workstations page.
Go to Workstations
Click the workstation name to open the Workstation details page.
In the following example, replace the placeholders for the workstation name, region (location), workstation cluster name, and workstation configuration name. Copy the values from the Workstation details panel into the placeholders marked with an editEdit icon.
```
gcloud workstations start-tcp-tunnel \
  --project=PROJECT_ID \
  --region=REGION \
  --cluster=CLUSTER_NAME \
  --config=CONFIG_NAME \
  --local-host-port=:LOCAL_PORT \
  WORKSTATION_NAME 22
```
See the Before you begin section to find the project ID.

The --local-host-port=:LOCAL_PORT flag is optional. If you would like to specify a local port, replace LOCAL_PORT with the local port number that you want to use. If you don't specify a local port, the system chooses an arbitrary, unused local port for you, and outputs a message with the port number so you know which local port it uses.
After filling in the placeholders, click content_copy Copy code sample to copy the gcloud CLI command.
Paste the command into your local terminal window and press Enter to create the tunnel.

When the command succeeds, a Listening on port message appears followed by the local port number.

For more details about each configuration flag, see SSH tunnel or start-tcp-tunnel.

Connect to a Cloud Workstations host

Follow these steps to connect to a Cloud Workstations host:

Open or return to the VS Code application.
To launch Remote - SSH, click Open a Remote Window in the status bar.
Select the Connect to Host option when the command palette opens.
Enter user@localhost:LOCAL_PORT, replacing LOCAL_PORT with your local port number.

The following example connects to local port 1025 by specifying user@localhost:1025.

Note: The host keys for the workstations change between sessions because workstations run on ephemeral VMs. Ensure that host key validation is disabled for the workstation configuration for this reason.
If prompted to connect after you see the Host Added confirmation message, click Connect.

The system might also prompt you to confirm the hash. If prompted, click Continue.
A new VS Code editor opens and the VS Code status bar shows SSH: localhost: followed by the port number.

You now have access to the files and language servers on your remote workstation, and you can build and run processes that run inside your workstation.

The following example shows a VS Code editor window connected to Cloud Workstations through SSH: localhost: 1025.

You can also go back to the Extensions Marketplace to install Cloud Code and other local VS Code extensions to help you build, run, and test your code.