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snowy-owl

0.2.0 • Public • Published

Snowy Owl

Notice: This is still a work in progress. I'll remove this notice when it's fairly stable. Or, follow the version number.

A git server that mirrors repositories on a GitHub account at every commit and pushes that repository to a given S3 bucket if the commit message contains a specified trigger string. Tested on Ubuntu 12.04.

Read the full setup instructions on the wiki for detailed steps on how to configure the server, clients and the required GitHub settings.

The instructions below only cover the server.

===========

The Snowy Owl server requires that you've already set up a webhook from your Github repositry to your machines IP address on the proper port (see below for default port info). It's meant to be used in conjunction with the Snowy Owl command-line interface, which sets up a lot of that automatically for you.

A note on paths: Except in crontabs, relative paths will suffice. I've supplied the full paths in many of these commands for clarity because I find relative paths can be confusing in some documentation since it's not always clear what directory you're supposed to be in. As a result, a lot of these commands look more unwieldy than they are. Hopefully they're a bit clearer once you look past the slashes.

Installation

If you already have Node.js, Python & Pip

git clone https://github.com/mhkeller/snowy-owl
cd snowy-owl && sudo npm install

You also want to install the Amazon Web Services Command-line interface, which is a python package.

sudo pip install awscli

If you don't have Node.js, Python & Pip, Git, others...

sudo apt-get update
sudo apt-get install -y python-software-properties python g++ make python-pip
sudo apt-get install tmux
sudo add-apt-repository ppa:chris-lea/node.js
sudo apt-get update
sudo apt-get install nodejs
 
sudo apt-get install mailutils # For crontab logs, say okay to all prompts
sudo apt-get install git-core

Configuration

Server configuration

All settings are stored in config.sample.json. Enter your own values and rename it to config.json.

{
    "github_listener": {
        "account_name": "Your GitHub account name",
        "port": 9001
    },
    "s3": {
        "enabled": false,
        "bucket_name": "Your S3 bucket name",
        "path": "2014/",
        "sync_deploy_trigger": "String to trigger a sync to s3",
        "exclude_from_sync": [".git/*", ".*"],
        "hard_deploy": {
            "enabled": false,
            "trigger": "String to trigger an overwrite of S3 files"
        }
    },
    "archive": {
        "enabled": false,
        "account_name": "Your GitHub or bitbucket account name",
        "type": "Choose either bitbucket or github"
    },
    "verify_committer": {
        "enabled": false,
        "team_id": "000001",
        "access_token": "Your access token"
    }
}

Key Default value Description
github_listener.account_name none The name of your GitHub account to account. This is used to make sure your server only responds to hooks from your account.
github_listener.port 9001 The port your server will listen on. Make sure to open up traffic to this port in your security group.
s3.enabled false Enable the ability to deploy to S3 if a certain string is matched in a commit message.
s3.bucket_name none The name of your S3 bucket to deploy to.
s3.path "2014/" The S3 path to put your repo. Must end with slash.
s3.sync_deploy_trigger none The string in your commit message that will trigger a sync to S3.
s3.hard_deploy.enabled false Enable the option that a string in your commit message will copy all files in your repo onto S3, not just the modified files and overwrite existing files. The hard_deploy.trigger regex will run first so if your hard deploy trigger is deploy-hard and your sync trigger is deploy, it will properly deploy hard. But it's probably best to make these two completely distinct strings to avoid confusion.
s3.hard_deploy.trigger none The string to trigger a hard deploy.
s3.exclude_from_sync [".git/*", ".*"] An array of file or folder names to not transfer to S3. By default it doesn't transfer the Git folder or any hidden files.
archive.enabled false If you enable archives, the server will automatically push your repo to another GitHub or Bitbucket account. Set this to true to enable.
archive.account_name none The account name to archive this repo under.
archive.type none Can be either bitbucket or github.
verify_committer.enabled false If you enable committer verifiation, the server will only allow committers who are members of a designated GitHub team to push to S3, even if they use the deploy trigger in their commit message. This only works for organizations since it requires teams.
verify_committer.team_id "000001" The team_id as a string.
verify_committer.access_token none Generate an access token from an administrator's account at https://github.com/settings/applications in order to see the member list of your deployment team. This user must also be a member of the deployment team.

AWS Configuration

The AWS CLI looks for credentials in the file ~/.aws/config.

Read the Amazon documentation for more details but the bare bones file looks like this:

[default]
aws_access_key_id=AKIAIOSFODNN7EXAMPLE
aws_secret_access_key=wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY

Start the server

node src/server.js

This will only run the listening server for your current session only. That's only recommended for testing. By default, the server runs on port 9001.

Run it as a service

If you want to run Snowy Owl all day long, use the Forever module to run the server in the background.

You'll want to install the module globally:

npm install forever -g

Then start the service:

forever start src/server.js

You'll also want to make sure this server starts up if your machine reboots. You can do this through setting your crontab. To edit your crontab run:

crontab -e

Note: If this is the first time you're running crontab it will ask you what editor you want to use.

Once you've picked an editor, add the following line to your crontab:

@reboot /usr/bin/forever start /full/path/to/server.js

To confirm the task was added, view your crontab with:

crontab -l

Note: The above line assumes that Forever is installed in /usr/bin/. To double check where your forever installed, run which forever.

Start the staging server

Snowy Owl uses git-static-diffuse to allow you to view your all of the commits and branches of your repositories through a web server with the following url structure (defaulting to port 3000):

http://your-snowy-owl-server.com:3000/repository-name/commit-or-branch-name/path/to/file.html

Install its command-line interface with

npm install git-static-diffuse -g

To test the server, cd into repositories and run

moire start

Now go to http://your-server.com:3000 and you should see your repositories. If on Amazon EC2, make sure you open up the port in your security group.

You can specify a port other than 3000 by using --port <replace-with-port-number> as an option.

Start the staging server as a service

Starting Forever from within your repositories directory:

forever start moire start

You'll have to give forever and your crontab the full path to your repositories folder in your crontab:

@reboot /usr/bin/forever start /usr/bin/moire start --repositories /home/ubuntu/tasks/snowy-owl/repositories

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