# Create a remote Zulip dev server This guide is for mentors who want to help create remote Zulip dev servers for hackathon, GCI, or sprint participants. The machines (droplets) have been generously provided by [DigitalOcean](https://www.digitalocean.com/) to help Zulip contributors get up and running as easily as possible. Thank you DigitalOcean! The `create.py` create uses the DigitalOcean API to quickly create new virtual machines (droplets) with the Zulip dev server already configured. ## Step 1: Join Zulip DigitalOcean team We have created a team on DigitalOcean for Zulip mentors. Ask Rishi or Tim to be added. You need access to the team so you can create your DigitalOcean API token. ## Step 2: Create your DigitalOcean API token Once you've been added to the Zulip team, [log in](https://cloud.digitalocean.com/droplets) to the DigitalOcean control panel and [create your personal API token][do-create-api-token]. **Make sure you create your API token under the Zulip team.** (It should look something like [this][image-zulip-team]). Copy the API token and store it somewhere safe. You'll need it in the next step. ## Step 3: Configure create.py In `tools/droplets/` there is a sample configuration file `conf.ini-template`. Copy this file to `conf.ini`: ``` $ cd tools/droplets/ $ cp conf.ini-template conf.ini ``` Now edit the file and replace `APITOKEN` with the personal API token you generated earlier. ``` [digitalocean] api_token = APITOKEN ``` Now you're ready to use the script. ## Usage `create.py` takes two arguments - GitHub username - Tags (Optional argument) ``` $ python3 create.py $ python3 create.py --tags $ python3 create.py --tags ``` Assigning tags to droplets like `GCI` can be later useful for listing all the droplets created during GCI. [Tags](https://www.digitalocean.com/community/tutorials/how-to-tag-digitalocean-droplets) may contain letters, numbers, colons, dashes, and underscores. You'll need to run this from the Zulip development environment (e.g. in Vagrant). The script will also stop if a droplet has already been created for the user. If you want to recreate a droplet for a user you can pass the `--recreate` flag. ``` $ python3 create.py --recreate ``` This will destroy the old droplet and create a new droplet for the user. In order for the script to work, the GitHub user must have: - forked the [zulip/zulip][zulip-zulip] repository, and - created an SSH key pair and added it to their GitHub account. (Share [this link][how-to-request] with students if they need to do these steps.) The script will stop if it can't find the user's fork or SSH keys. Once the droplet is created, you will see something similar to this message: ``` Your remote Zulip dev server has been created! - Connect to your server by running `ssh zulipdev@.zulipdev.org` on the command line (Terminal for macOS and Linux, Bash for Git on Windows). - There is no password; your account is configured to use your SSH keys. - Once you log in, you should see `(zulip-py3-venv) ~$`. - To start the dev server, `cd zulip` and then run `./tools/run-dev`. - While the dev server is running, you can see the Zulip server in your browser at http://.zulipdev.org:9991. See [Developing remotely](https://zulip.readthedocs.io/en/latest/development/remote.html) for tips on using the remote dev instance and [Git & GitHub Guide](https://zulip.readthedocs.io/en/latest/git/index.html) to learn how to use Git with Zulip. ``` Copy and paste this message to the user via Zulip chat. Be sure to CC the user so they are notified. [do-create-api-token]: https://www.digitalocean.com/community/tutorials/how-to-use-the-digitalocean-api-v2#how-to-generate-a-personal-access-token [image-zulip-team]: http://cdn.subfictional.com/dropshare/Screen-Shot-2016-11-28-10-53-24-X86JYrrOzu.png [zulip-zulip]: https://github.com/zulip/zulip [python-digitalocean]: https://github.com/koalalorenzo/python-digitalocean [how-to-request]: https://zulip.readthedocs.io/en/latest/development/request-remote.html ## Updating the base image 1. Switch to the Zulip organization. 1. Create a new droplet, with: - "Regular with SSD" / "2GB RAM / 1 CPU" - Select your SSH key; this will not be built into the image, and is only for access to debug if the build does not succeed. - Check "Monitoring", "IPv6", and "User data" - Paste the contents of `tools/droplets/new-droplet-image` into the text box which says `Enter user data here...` - Name it e.g. `base-ubuntu-20-04.zulipdev.org` 1. Add an A record for `base.zulipdev.org` to point to the new host. 1. Wait for the host to boot. 1. `scp tools/droplets/new-droplet-image base.zulipdev.org:/tmp/new-droplet-image` 1. `ssh root@base.zulipdev.org bash /tmp/new-droplet-image`; this should take about 15 minutes to complete, and will finish by closing the connection and shutting the host down. 1. Go to the Snapshots tab on the image, and "Take a Snapshot". 1. Wait for several minutes for it to complete. 1. "Add to region" the snapshot into `NYC3`, `SFO3`, `BLR1`, and `FRA1`. 1. `curl -u : https://api.digitalocean.com/v2/snapshots | jq .` 1. Replace `template_id` in `create.py` in this directory with the appropriate `id`. 1. Clean up by destroying the droplet (but _leaving_ all "associated resources"), and removing the DNS entry for `base.zulipdev.org` 1. Open a PR with the updated `template_id`. ## Remotely debugging a droplet To SSH into a droplet, first make sure you have a SSH key associated with your GitHub account, then ask the student to run the following in their VM: ``` $ python3 ~/zulip/tools/droplets/add_mentor.py ``` You should now be able to connect to it using: ``` $ ssh zulipdev@.zulipdev.org ``` They can remove your SSH keys by running: ``` $ python3 ~/zulip/tools/droplets/add_mentor.py --remove ``` # Creating a production droplet `create.py` can also create a production droplet quickly for testing purposes. ``` $ python3 create.py --production ```