Etcenv: Dump etcd keys into dotenv file or docker env file

Installation

$ gem install etcenv

Simple Usage

Create directory and keys on etcd

etcdctl mkdir /my-app
etcdctl set /my-app/AWESOME_SERVICE_CREDENTIAL xxxxxx

Run etcenv

One-shot

This will output generated .env file to STDOUT.

$ etcenv /my-app
AWESOME_SERVICE_CREDENTIAL=xxxxxx

or

$ etcenv -o .env /my-app
$ cat .env
AWESOME_SERVICE_CREDENTIAL=xxxxxx

to save as file.

Continuously update

Etcenv also supports watching etcd server. In --watch mode, Etcenv updates dotenv file when value gets updated:

$ etcenv --watch -o .env /my-env

Also you can start it as daemon:

$ etcenv --watch --daemon /path/to/pidfile.pid -o .env /my-env

For docker

Use --docker flag to generate file for docker's --env-file option.

In docker mode, etcenv evaluates ${...} expansion like dotenv do.

Options

etcd options

• --etcd: URL of etcd to connect to. Path in URL will be ignored.
• --etcd-ca-file: Path to CA certificate file (PEM) of etcd server.
• --etcd-cert-file: Path to client certificate file for etcd.
• --etcd-key-file: Path to private key file of client certificate file for etcd.

Advanced usage

Include other directory's variables

Set directory path to .include. Directories can be specified multiple, separated by comma.

etcdctl mkdir /common
etcdctl set /common/COMMON_SECRET xxx
etcdctl set /my-app/.include /common

Also, you can omit path of parent directory:

etcdctl mkdir /envs/common
etcdctl set /envs/common/COMMON_SECRET xxx

etcdctl mkdir /envs/my-app
etcdctl set /envs/my-app/.include common

• .include will be applied recursively (up to 10 times by default). If .include is looping, it'll be an error.
• For multiple .include, value for same key may be overwritten.
  • If a includes b,c and b includes d, result for a will be: d, b, c, then a.

Development

After checking out the repo, run scripts/setup to install dependencies. Then, run scripts/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release to create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

1. Fork it ( https://github.com/sorah/etcenv/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request