Event Provenance Registry (EPR)

Overview

Event Provenance Registry (EPR) is a provenance store. It keeps track of events. With EPR, you can use the API to create, retrieve, and query events, event receivers, and groups of event receivers.

Description

The Event Provenance Registry (EPR) is a service that stores events and tracks event-receivers and event-receiver-groups. EPR provides an API that lets you create events, event-receivers, and event-receiver-groups. You can query the EPR using the GraphQL endpoint to get identifying information about events, event-receivers, and event-receiver-groups. EPR collects events from the supply chain to record the lifecycle of a unit in the SDLC. EPR validates event-receivers have events. EPR emits a message when a event is received as well as when an event-receiver-groups is complete for a unit version.

EPR Documentation

Develop

Build

make

Installation

To install in /usr/local/bin directory

Linux

make install

Mac OS X

make install-darwin

To install in your go path directory set PREFIX

Linux

make PREFIX=$(go env GOPATH) install

Mac OS X

make PREFIX=$(go env GOPATH) install-darwin

Tests

Run the go unit tests:

make test

Linter

Run golangci-lint (requires golangci-lint):

make megalint

Usage

Usage:
  epr-server [flags]

Flags:
      --brokers string   broker uris separated by commas (default "localhost:9092")
      --config string    config file (default is $XDG_CONFIG_HOME/epr/epr.yaml)
      --db string        database connection string (default "postgres://localhost:5432")
      --debug            Enable debugging statements
  -h, --help             help for epr-server
      --host string      host to listen on (default "localhost")
      --port string      port to listen on (default "8042")
      --topic string     topic to produce events on (default "epr.dev.events")

Running the Server

See the docs for how to start EPR and its dependencies.

Interacting with the Server

An event receiver is an object that represents some type of action that would occur in your pipeline (i.e. a build, a test run, a deployment, etc...).

Create an event receiver:

curl --location --request POST 'http://localhost:8042/api/v1/receivers' \
--header 'Content-Type: application/json' \
--data-raw '{
  "name": "foobar",
  "type": "whatever",
  "version": "1.1.2",
  "description": "it does stuff",
  "enabled": true,
  "schema": {
  "type": "object",
  "properties": {
    "name": {
      "type": "string"
    }
  }
}
}'

When you create an event, you must specify an event_receiver_id to associate it with. An event is the record of some action being completed. You cannot create an event for a non-existent receiver ID. The payload field of the event must conform to the schema defined on the event receiver that you have given the ID of.

Create an event:

curl --location --request POST 'http://localhost:8042/api/v1/events' \
--header 'Content-Type: application/json' \
--data-raw '{
    "name": "idc",
    "version": "2.2.2",
    "release": "whatever",
    "platform_id": "linux",
    "package": "docker",
    "description": "blah",
    "payload": {"name":"bob"},
    "success": true,
    "event_receiver_id": "01HDS785T0V8KTSTDM9XGT33QQ"
}'

Create a group:

curl --location --request POST 'http://localhost:8042/api/v1/groups' \
--header 'Content-Type: application/json' \
--data-raw '{
    "name": "group",
    "type": "notyours",
    "version": "3.3.3",
    "description": "foobar",
    "enabled": true,
    "event_receiver_ids": ["01H9GW7FYY4XYE2R930YTFM7FM"]
}'

GraphQL

Curl commands for GraphQL Search

curl -X POST -H "content-type:application/json" -d '{"query":"query FindEvents($id: ID!){events(id: $id) {id,name,version,release,platform_id,package,description,payload,success,created_at,event_receiver_id}}","variables":{"id":"01HKX1TMQZQDS6NC5DG7WNXXCJ"}}' http://localhost:8042/api/v1/graphql/query

curl -X POST -H "content-type:application/json" -d '{"query":"query FindEventReceivers($id: ID!){event_receivers(id: $id) {id,name,version,description,type,schema,created_at}}","variables":{"id":"01HKX0KY3B31MR3XKJWTDZ4EQ0"}}' http://localhost:8042/api/v1/graphql/query

curl -X POST -H "content-type:application/json" -d '{"query":"query FindEventReceiverGroups($id: ID!){event_receiver_groups(id: $id) {id,name,type,version,description,enabled,event_receiver_ids,created_at,updated_at}}","variables":{"id":"01HKX90FKWQZ49F6H5V5NQT95Z"}}' http://localhost:8042/api/v1/graphql/query

Links

• EPR Python Client
• EPR Workshop

Contributing

We welcome your contributions! Please read CONTRIBUTING.md for details on how to submit contributions to this project.

License

This project is licensed under the Apache 2.0 License.