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zulip/tools/droplets/create.py

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# Creates a Droplet on DigitalOcean for remote Zulip development.
# Particularly useful for sprints/hackathons, interns, and other
# situation where one wants to quickly onboard new contributors.
#
# This script takes one argument: the name of the GitHub user for whom you want
# to create a Zulip developer environment. Requires Python 3.
#
# Requires python-digitalocean library:
# https://github.com/koalalorenzo/python-digitalocean
#
# Also requires DigitalOcean team membership for Zulip and API token:
# https://cloud.digitalocean.com/settings/api/tokens
#
# Copy conf.ini-template to conf.ini and populate with your API token.
#
# usage: python3 create.py <username>
import argparse
import configparser
import json
import os
import sys
import time
import urllib.error
import urllib.request
from typing import Any, Dict, List
import digitalocean
# initiation argument parser
parser = argparse.ArgumentParser(description="Create a Zulip devopment VM DigitalOcean droplet.")
parser.add_argument(
"username", help="GitHub username for whom you want to create a Zulip dev droplet"
)
parser.add_argument("--tags", nargs="+", default=[])
parser.add_argument("-f", "--recreate", action="store_true")
def get_config() -> configparser.ConfigParser:
config = configparser.ConfigParser()
config.read(os.path.join(os.path.dirname(os.path.abspath(__file__)), "conf.ini"))
return config
def user_exists(username: str) -> bool:
print(f"Checking to see if GitHub user {username} exists...")
user_api_url = f"https://api.github.com/users/{username}"
try:
response = urllib.request.urlopen(user_api_url)
json.load(response)
print("...user exists!")
return True
except urllib.error.HTTPError as err:
print(err)
print(f"Does the GitHub user {username} exist?")
sys.exit(1)
def get_keys(username: str) -> List[Dict[str, Any]]:
print("Checking to see that GitHub user has available public keys...")
apiurl_keys = f"https://api.github.com/users/{username}/keys"
try:
response = urllib.request.urlopen(apiurl_keys)
userkeys = json.load(response)
if not userkeys:
print(f"No keys found. Has user {username} added SSH keys to their GitHub account?")
sys.exit(1)
print("...public keys found!")
return userkeys
except urllib.error.HTTPError as err:
print(err)
print(f"Has user {username} added SSH keys to their GitHub account?")
sys.exit(1)
def fork_exists(username: str) -> bool:
print("Checking to see GitHub user has forked zulip/zulip...")
apiurl_fork = f"https://api.github.com/repos/{username}/zulip"
try:
response = urllib.request.urlopen(apiurl_fork)
json.load(response)
print("...fork found!")
return True
except urllib.error.HTTPError as err:
print(err)
print(f"Has user {username} forked zulip/zulip?")
sys.exit(1)
def exit_if_droplet_exists(my_token: str, username: str, recreate: bool) -> None:
print(f"Checking to see if droplet for {username} already exists...")
manager = digitalocean.Manager(token=my_token)
my_droplets = manager.get_all_droplets()
for droplet in my_droplets:
if droplet.name.lower() == f"{username}.zulipdev.org":
if not recreate:
print(
"Droplet for user {} already exists. Pass --recreate if you "
"need to recreate the droplet.".format(username)
)
sys.exit(1)
else:
print(f"Deleting existing droplet for {username}.")
droplet.destroy()
return
print("...No droplet found...proceeding.")
def set_user_data(username: str, userkey_dicts: List[Dict[str, Any]]) -> str:
print("Setting cloud-config data, populated with GitHub user's public keys...")
userkeys = [userkey_dict["key"] for userkey_dict in userkey_dicts]
ssh_keys = "\n".join(userkeys)
setup_root_ssh_keys = f"printf '{ssh_keys}' > /root/.ssh/authorized_keys"
setup_zulipdev_ssh_keys = f"printf '{ssh_keys}' > /home/zulipdev/.ssh/authorized_keys"
# We pass the hostname as username.zulipdev.org to the DigitalOcean API.
# But some droplets (eg on 18.04) are created with with hostname set to just username.
# So we fix the hostname using cloud-init.
hostname_setup = f"hostnamectl set-hostname {username}.zulipdev.org"
setup_repo = (
"cd /home/zulipdev/{1} && "
"git remote add origin https://github.com/{0}/{1}.git && "
"git fetch origin && "
"git clean -f"
)
server_repo_setup = setup_repo.format(username, "zulip")
python_api_repo_setup = setup_repo.format(username, "python-zulip-api")
cloudconf = f"""\
#!/bin/bash
{setup_zulipdev_ssh_keys}
{setup_root_ssh_keys}
sed -i "s/PasswordAuthentication yes/PasswordAuthentication no/g" /etc/ssh/sshd_config
service ssh restart
{hostname_setup}
su -c '{server_repo_setup}' zulipdev
su -c '{python_api_repo_setup}' zulipdev
su -c 'git config --global core.editor nano' zulipdev
su -c 'git config --global pull.rebase true' zulipdev
"""
print("...returning cloud-config data.")
return cloudconf
def create_droplet(
my_token: str, template_id: str, username: str, tags: List[str], user_data: str
) -> str:
droplet = digitalocean.Droplet(
token=my_token,
name=f"{username}.zulipdev.org",
region="nyc3",
image=template_id,
size_slug="s-1vcpu-2gb",
user_data=user_data,
tags=tags,
backups=False,
)
print("Initiating droplet creation...")
droplet.create()
incomplete = True
while incomplete:
actions = droplet.get_actions()
for action in actions:
action.load()
print(f"...[{action.type}]: {action.status}")
if action.type == "create" and action.status == "completed":
incomplete = False
break
if incomplete:
time.sleep(15)
print("...droplet created!")
droplet.load()
print(f"...ip address for new droplet is: {droplet.ip_address}.")
return droplet.ip_address
def delete_existing_records(records: List[digitalocean.Record], record_name: str) -> None:
count = 0
for record in records:
if record.name == record_name and record.domain == "zulipdev.org" and record.type == "A":
record.destroy()
count = count + 1
if count:
print(f"Deleted {count} existing A records for {record_name}.zulipdev.org.")
def create_dns_record(my_token: str, username: str, ip_address: str) -> None:
domain = digitalocean.Domain(token=my_token, name="zulipdev.org")
domain.load()
records = domain.get_records()
delete_existing_records(records, username)
wildcard_name = "*." + username
delete_existing_records(records, wildcard_name)
print(f"Creating new A record for {username}.zulipdev.org that points to {ip_address}.")
domain.create_new_domain_record(type="A", name=username, data=ip_address)
print(f"Creating new A record for *.{username}.zulipdev.org that points to {ip_address}.")
domain.create_new_domain_record(type="A", name=wildcard_name, data=ip_address)
def print_completion(username: str) -> None:
print(
"""
COMPLETE! Droplet for GitHub user {0} is available at {0}.zulipdev.org.
Instructions for use are below. (copy and paste to the user)
------
Your remote Zulip dev server has been created!
- Connect to your server by running
`ssh zulipdev@{0}.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.py`.
- While the dev server is running, you can see the Zulip server in your browser at
http://{0}.zulipdev.org:9991.
""".format(
username
)
)
print(
"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.\n"
)
print(
"Note that this droplet will automatically be deleted after a month of inactivity. "
"If you are leaving Zulip for more than a few weeks, we recommend pushing all of your "
"active branches to GitHub."
)
print("------")
if __name__ == "__main__":
# define id of image to create new droplets from
# You can get this with something like the following. You may need to try other pages.
# Broken in two to satisfy linter (line too long)
# curl -X GET -H "Content-Type: application/json" -u <API_KEY>: "https://api.digitaloc
# ean.com/v2/images?page=5" | grep --color=always base.zulipdev.org
template_id = "63219191"
# get command line arguments
args = parser.parse_args()
username = args.username.lower()
print(f"Creating Zulip developer environment for GitHub user {username}...")
# get config details
config = get_config()
# see if droplet already exists for this user
user_exists(username=username)
# grab user's public keys
public_keys = get_keys(username=username)
# now make sure the user has forked zulip/zulip
fork_exists(username=username)
api_token = config["digitalocean"]["api_token"]
# does the droplet already exist?
exit_if_droplet_exists(my_token=api_token, username=username, recreate=args.recreate)
# set user_data
user_data = set_user_data(username=username, userkey_dicts=public_keys)
# create droplet
ip_address = create_droplet(
my_token=api_token,
template_id=template_id,
username=username,
tags=args.tags,
user_data=user_data,
)
# create dns entry
create_dns_record(my_token=api_token, username=username, ip_address=ip_address)
# print completion message
print_completion(username=username)
sys.exit(1)
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