summon

summon

conjurinc.github.io/summon

summon is a command-line tool to make working with secrets easier.

It provides an interface for

• Reading a secrets.yml file
• Fetching secrets from a trusted store
• Exporting secret values to a sub-process environment

Note that summon is still in early stages, we are looking for feedback and contributions.

Install

OSX

Install via Homebrew.

brew tap conjurinc/summon
brew install summon

Linux

Use the auto-install script. This will install the latest version of summon. The script requires sudo to place summon in /usr/local/bin.

curl -sSL https://raw.githubusercontent.com/conjurinc/summon/master/install.sh | bash

For other platforms, download the latest release and unzip it to a location on your PATH.

Usage

By default, summon will look for secrets.yml in the directory it is called from and export the secret values to the environment of the command it wraps.

Example

You want to run script that requires AWS keys to list your EC2 instances.

Define your keys in a secrets.yml file

AWS_ACCESS_KEY_ID: !var aws/iam/user/robot/access_key_id
AWS_SECRET_ACCESS_KEY: !var aws/iam/user/robot/secret_access_key

The script uses the Python library boto, which looks for AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY in the environment.

import boto
botoEC2 = boto.connect_ec2()
print(botoEC2.get_all_instances())

Wrap the Python script in summon:

summon python listEC2.py

python listEC2.py is the command that summon wraps. Once the Python program exits, the secrets stored in temp files and in the Python process environment are gone.

Flags

summon supports a number of flags.

• -p, --provider specify the path to the provider summon should use

  If the provider is in the default path, /usr/libexec/summon/ you can just provide the name of the executable. If not, use the full path.

• -f <path> specify a location to a secrets.yml file, default 'secrets.yml' in current directory.

• -D 'var=value' causes substitution of value to $var.

  You can use the same secrets.yml file for different environments, using -D to substitute variables. This flag can be used multiple times.

  Example

  summon -D ENV=production --yaml 'SQL_PASSWORD: !var env/$ENV/db-password' deploy.sh
  

• -i, --ignore A secret path for which to ignore provider errors

  This flag can be useful for when you have secrets that you don't need access to for development. For example API keys for monitoring tools. This flag can be used multiple times.

View help and all flags with summon -h.

env-file

Using Docker? When you run summon it also exports the variables and values from secrets.yml in VAR=VAL format to a memory-mapped file, its path made available as @SUMMONENVFILE.

You can then pass secrets to your container using Docker's --env-file flag like so:

summon docker run myorg/myimage --env-file @SUMMONENVFILE

This file is created on demand - only when @SUMMONENVFILE appears in the arguments of the command summon is wrapping. This feature is not Docker-specific; if you have another tools that reads variables in VAR=VAL format you can use @SUMMONENVFILE just the same.

Development

Dependencies are vendored with godep. To make them available, run export GOPATH=godep path:$GOPATH.

Run the project with:

go run *.go`.

Testing

Tests are written using GoConvey. Run tests with go test -v ./... or ./test.sh (for CI).

Building

To build 64bit versions for Linux, OSX and Windows:

./build.sh

Binaries will be placed in pkg/.