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Bobby Ho
dcb120d6ab
Add `--no-wildcard` (`CODER_CONFIGSSH_NO_WILDCARD`) to `coder config-ssh` that generates an individual `Host` entry per workspace instead of a single wildcard block (`Host *.coder`). The wildcard approach cannot be enumerated by third-party SSH clients, the VS Code Remote-SSH sidebar, or scripts that parse `~/.ssh/config` to discover hosts. With `--no-wildcard`, each workspace gets its own entry so those tools work without Coder-specific extensions. The flag is persisted in the config section header so re-running without it prompts the user about the option change. Workspaces are fetched with pagination before writing so the diff shows actual hostnames. ## Manual testing **Unit tests (no server needed):** ```sh go test ./cli/ -run TestSSHConfigOptions_writeToBuffer -v go test ./cli/ -run TestConfigSSH_NoWildcard -v ``` **End-to-end with a dev server:** 1. Build: `go build -o ./coder .` 2. Start dev server in a separate terminal: `./scripts/develop.sh` 3. Log in: `./coder login http://localhost:3000` 4. Create two workspaces 5. Run both variants into temp files: ```sh ./coder config-ssh --no-wildcard --hostname-suffix coder --ssh-config-file /tmp/test-ssh-config --yes ./coder config-ssh --hostname-suffix coder --ssh-config-file /tmp/test-ssh-config-wildcard --yes diff /tmp/test-ssh-config-wildcard /tmp/test-ssh-config ``` <details> <summary>Output: <code>--no-wildcard</code></summary> ``` # ------------START-CODER----------- # This section is managed by coder. DO NOT EDIT. # # You should not hand-edit this section unless you are removing it, all # changes will be lost when running "coder config-ssh". # # Last config-ssh options: # :hostname-suffix=coder # :no-wildcard=true # Host coder.myworkspace ConnectTimeout=0 StrictHostKeyChecking=no UserKnownHostsFile=/dev/null LogLevel ERROR ProxyCommand <coder> --global-config <config> ssh --stdio --ssh-host-prefix coder. %h Host coder.myworkspace2 ConnectTimeout=0 StrictHostKeyChecking=no UserKnownHostsFile=/dev/null LogLevel ERROR ProxyCommand <coder> --global-config <config> ssh --stdio --ssh-host-prefix coder. %h Host myworkspace.coder ConnectTimeout=0 StrictHostKeyChecking=no UserKnownHostsFile=/dev/null LogLevel ERROR Match host myworkspace.coder !exec "<coder> connect exists %h" ProxyCommand <coder> --global-config <config> ssh --stdio --hostname-suffix coder %h Host myworkspace2.coder ConnectTimeout=0 StrictHostKeyChecking=no UserKnownHostsFile=/dev/null LogLevel ERROR Match host myworkspace2.coder !exec "<coder> connect exists %h" ProxyCommand <coder> --global-config <config> ssh --stdio --hostname-suffix coder %h # ------------END-CODER------------ ``` </details> <details> <summary>Output: wildcard (default)</summary> ``` # ------------START-CODER----------- # This section is managed by coder. DO NOT EDIT. # # You should not hand-edit this section unless you are removing it, all # changes will be lost when running "coder config-ssh". # # Last config-ssh options: # :hostname-suffix=coder # Host coder.* ConnectTimeout=0 StrictHostKeyChecking=no UserKnownHostsFile=/dev/null LogLevel ERROR ProxyCommand <coder> --global-config <config> ssh --stdio --ssh-host-prefix coder. %h Host *.coder ConnectTimeout=0 StrictHostKeyChecking=no UserKnownHostsFile=/dev/null LogLevel ERROR Match host *.coder !exec "<coder> connect exists %h" ProxyCommand <coder> --global-config <config> ssh --stdio --hostname-suffix coder %h # ------------END-CODER------------ ``` </details> <details> <summary>diff wildcard → --no-wildcard</summary> ```diff 8a9 > # :no-wildcard=true 10c11 < Host coder.* --- > Host coder.myworkspace 17c18 < Host *.coder --- > Host coder.myworkspace2 21a23 > ProxyCommand <coder> ssh --stdio --ssh-host-prefix coder. %h 23c25,31 < Match host *.coder !exec "<coder> connect exists %h" --- > Host myworkspace.coder > ConnectTimeout=0 > StrictHostKeyChecking=no > UserKnownHostsFile=/dev/null > LogLevel ERROR > > Match host myworkspace.coder !exec "<coder> connect exists %h" ``` </details> Closes https://github.com/coder/coder/issues/17153 (Phase 1: CLI flag)
Coder is a self-hosted platform for cloud development environments and AI coding agents. Workspaces are defined with Terraform, connected through a secure Wireguard® tunnel, and automatically shut down when not used. Coder Agents runs a native AI coding agent whose loop executes in the control plane on your infrastructure, with no API keys in workspaces.
- Define cloud development environments in Terraform
- EC2 VMs, Kubernetes Pods, Docker Containers, etc.
- Automatically shutdown idle resources to save on costs
- Onboard developers in seconds instead of days
- Delegate coding work to AI agents on your infrastructure
- Bring any model (Anthropic, OpenAI, Google, Bedrock, self-hosted)
- No LLM credentials in workspaces, user identity on every action
- Centralized model governance, cost tracking, and audit logging
Quickstart
The most convenient way to try Coder is to install it on your local machine and experiment with provisioning cloud development environments using Docker (works on Linux, macOS, and Windows).
# First, install Coder
curl -L https://coder.com/install.sh | sh
# Start the Coder server (caches data in ~/.cache/coder)
coder server
# Navigate to http://localhost:3000 to create your initial user,
# create a Docker template and provision a workspace
Install
The easiest way to install Coder is to use the
install script for Linux
and macOS. For Windows, use the latest ..._installer.exe file from GitHub
Releases.
curl -L https://coder.com/install.sh | sh
You can run the install script with --dry-run to see the commands that will be used to install without executing them. Run the install script with --help for additional flags.
See install for additional methods.
Once installed, you can start a production deployment with a single command:
# Automatically sets up an external access URL on *.try.coder.app
coder server
# Requires a PostgreSQL instance (version 13 or higher) and external access URL
coder server --postgres-url <url> --access-url <url>
Use coder --help to get a list of flags and environment variables. See the install guides for a complete tutorial.
Documentation
Browse the documentation or visit a specific section below:
- Workspaces: Workspaces contain the IDEs, dependencies, and configuration information needed for software development
- Templates: Templates are written in Terraform and describe the infrastructure for workspaces
- Coder Agents: Delegate coding work to AI agents running on your self-hosted infrastructure
- Administration: Learn how to operate Coder
- Premium: Learn about paid features built for large teams
- IDEs: Connect your existing editor to a workspace
Support
Feel free to open an issue if you have questions, run into bugs, or have a feature request.
Join our Discord to provide feedback on in-progress features and chat with the community using Coder!
Integrations
New integrations are always in progress. Open an issue to request one. Contributions are welcome in any official or community repository.
Official
- Coder Registry: Templates, modules, and integrations for common development environments
- VS Code Extension: Open any Coder workspace in VS Code with a single click
- JetBrains Toolbox Plugin: Open any Coder workspace from JetBrains Toolbox with a single click
- JetBrains Gateway Plugin: Open any Coder workspace in JetBrains Gateway with a single click
- Dev Containers: Build development environments using
devcontainer.jsonon Docker, Kubernetes, and OpenShift - Kubernetes Log Stream: Stream Kubernetes Pod events to the Coder startup logs
- Self-Hosted VS Code Extension Marketplace: A private extension marketplace that works in restricted or airgapped networks integrating with code-server.
- GitHub Actions: An action to set up the Coder CLI in GitHub workflows
Community
- Community Templates: Community-contributed workspace templates in the Coder Registry
- Community Modules: Community-contributed modules to extend Coder templates
- Provision Coder with Terraform: Provision Coder on Google GKE, Azure AKS, AWS EKS, DigitalOcean DOKS, IBMCloud K8s, OVHCloud K8s, and Scaleway K8s Kapsule with Terraform
- Coder Template GitHub Action: A GitHub Action that updates Coder templates
- Discord: Chat with the community and provide feedback on in-progress features
Contributing
New contributors are always welcome. If you are new to the Coder codebase, see the contribution guide to get started.
Hiring
Apply on the careers page if you are interested in joining the team.