lucify-notifier
v0.1.17
Published
Integrates with the GitHub deployments API and Flowdock
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lucify-notifier
A Node.js CLI utility for sending deployment notifications to Flowdock and/or to GitHub's Deployments API.
lucify-notifier
wraps a shell command and sends success or failure
notifications based on the exit code of the wrapped executable.
At Lucify we use lucify-notifier
as part of our CI pipeline, for example
with the following deploy script in package.json
:
"scripts": {
"deploy": "lucify-notifier ecs-updater"
}
Authentication
Flowdock
The flow and the authorization to post to it are specified with the FLOWDOCK_FLOW_TOKEN
environment variable. This needs to be a so called source flow_token
:
https://www.flowdock.com/api/sources.
GitHub
To authorize with GitHub, you need to create and install a GitHub Integration (still an early access feature) for your organization. The integration needs to have read and write access to commit statuses and deployments. With the integration installed, the following environment variables need to be set:
GITHUB_CREDENTIALS_INTEGRATION_ID="<the id of the integration>"
GITHUB_CREDENTIALS_INSTALLATION_ID="<the installation id of the above integration>"
GITHUB_CREDENTIALS_KEY="<the secret key retrieved from GH's UI when installing the integration>"
Another way to provide the GitHub credentials is store the above information as a json file in a S3 bucket. The json should have the following schema:
{
"integration_id": "number",
"installation_id": "number",
"key": "string"
}
In this scenario the following environment variables need to be set:
AWS_ACCESS_KEY_ID="<credentials for accessing the above S3 object>"
AWS_SECRET_ACCESS_KEY="<credentials for accessing the above S3 object>"
The location of the credentials file can be provided as an environment variable
GITHUB_S3_CREDENTIALS="s3://<bucket>/<key>"
or specified as github.s3_credentials
in the configuration file described below.
Configuration
lucify-notifier
has three sources for its configuration, which
are in order of preference:
- environment variables
- configuration file
- defaults
There are quite a few settings, here's the complete json schema with their defaults:
{
github: {
// these correspond directly
// to the options in
// https://developer.github.com/v3/repos/deployments/#create-a-deployment
deploymentOptions: {
required_contexts: [],
task: 'deploy',
auto_merge: false,
payload: '',
description: '',
transient_environment: false,
production_environment: process.env.NODE_ENV === 'production',
},
// either credentials OR s3_credentials are required
credentials: {
integration_id: 0,
installation_id: 0,
key: '',
},
s3_credentials: '',
},
flowdock: {
flow_token: '', // required
author: {
name: '',
email: '', // required
},
},
deployment: {
branch: {
ref: 'master',
repository: '', // required
owner: '', // username or organization, required
},
environment: process.env.NODE_ENV,
committer: '', // required, explained in more detail below
url: '', // explained in more detail below
build_url: '', // explained in more detail below
commit_message: '', // explained in more detail below
},
build_command: '', // defaults to the one given on the command-line
decryption_key: '',
aws_temporary: '',
}
deployment.committer
This is crucial for the GitHub notifications. It has to correspond to a GitHub user who has authorization to create deployments in the specified repository. More information about integrations acting on behalf of users can be found on https://developer.github.com/early-access/integrations/authentication/#requesting-an-access-token-on-behalf-of-a-user.
If flowdock.author.name
is undefined, it defaults to deployment.committer
.
deployment.url
Used in the notification content. Should be specified if the deployment can be viewed in the browser. In GitHub's case, if specified, it will show a view deployment button in pull requests. In flowdock, it's part of the notification payload.
deployment.build_url
Used in the notification content. Should point to a url where a log of the build process can be viewed, such as a CI/CD service. In GitHub's case, if specified, it will show a deployed link in PRs. In flowdock, it's part of the notification payload.
deployment.commit_message
Used in the notification content. If not specified and the current working directory is a git repository, then the latest commit message from that repository is used.
Environment variables
Each of the options can be specified
with an environment variable. The variable
names correspond to the above schema, so that
, for example, flowdock.author.name
would be looked
from FLOWDOCK_AUTHOR_NAME
and decryption_key
from DECRYPTION_KEY
.
Configuration file
If a file named lucify-notifier.config.js|json
is found in the directory where lucify-notifier
is executed,
it is assumed to contain a json object with the schema
specified above. A .js
file should export the json with
module.exports = <json>
Here's an example of a typical configuration file:
const envVars = process.env;
const environment = envVars.NODE_ENV === 'production' ? 'production' : 'staging';
const statusUrl = `https://${environment === 'production' ? '' : 'staging.'}foo.io/status`;
module.exports = {
deployment: {
branch: {
ref: envVars.CIRCLE_BRANCH,
owner: envVars.CIRCLE_PROJECT_USERNAME,
repository: envVars.CIRCLE_PROJECT_REPONAME,
},
committer: envVars.CIRCLE_USERNAME,
build_url: envVars.CIRCLE_BUILD_URL,
url: statusUrl,
environment,
},
github: {
s3_credentials: 's3://<bucket>/<aws_credentials_key>',
deploymentOptions: {
transient_environment: true,
},
},
flowdock: {
flow_token: '',
author: {
email: '[email protected]',
},
},
decryption_key: '',
}
Credential decryption
In general lucify-notifier
tries to
not affect the executable it wraps in any way.
All the environment variables are passed on, with
one exception: if the AWS_TEMPORARY
option is specified,
then it is assumed that it constains encrypted
temporary AWS credentials that should be decrypted
and provided as environment variables for the the wrapped executable.
The mapping from the decrypted AWS_TEMPORARY
json to environment variables is:
{
'accessKeyId': 'AWS_ACCESS_KEY_ID',
'secretAccessKey': 'AWS_SECRET_ACCESS_KEY',
'sessionToken': 'AWS_SESSION_TOKEN',
}
This feature serves a very specific purpose: when launching
production deployments in CircleCI via its REST API, the extra environment
variables specified in the request, including the aws credentials, are visible
in the build log output. To prevent revealing them, one can then
specify the DECRYPTION_KEY
environment variable in the CircleCI project
settings (these are never visible) and provide an encrypted json object
in the AWS_TEMPORARY
variable. If DECRYPTION_KEY
is not defined, it defaults
to AWS_ACCESS_KEY_ID
.
The encryption and decryption details are a bit involved, but they use
aes-256-gcm
symmetric authenticated cryptography. See utils.ts
for
the code.