Chronos

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Visit our website at chronoslany.com.

Chronos is a comprehensive developer tool that monitors the health and web traffic for containerized (Docker & Kubernetes) and non-containerized microservices communicated via REST APIs or gRPC, whether hosted locally or on Amazon Web Services (AWS). Use Chronos to see real-time data monitoring and receive automated notifications over Slack or email.

What's New?

Chronos 14.0

Contributors: Michael Tagg, Ted Pham, Sofia Sarhiri, Stephen Yang,

Version 14.0 Medium Article

Iteration Log

Contributors: Elsa Holmgren, Mckenzie Morris, Kelly Chandler, Sean Simpson, Zhongyan Liang

Version 13.0 Medium Article

Contributors: Haoyu Liu, Edwin Leong, Eisha Kaushal, Tyler Coryell

Version 12.0 Medium Article

Contributors: Brisa Zhu, Lucie Seidler, Justin Poirier, Jeffrey Na, Kelsi Webb

Version 11.0 Medium Article

Contributors: Brian Lim, Claire Tischuk, Lennon Stewart, Victor Ye,

Version 10.0 Medium Article

Contributors: Brian Lim, Claire Tischuk, Lennon Stewart, Victor Ye

Version 9.0 Medium Article

Contributors: Vince Ho, Matt Giant, Derek Lam, Kit Loong Yee

Version 8.0 Medium Article

Contributors: Yang Song, Giovanni Floreslovo, James Edwards, Alex Kolb

Version 7.0 Medium Article

With Chronos 14.0

Overview of the CodeBase

• If you want to visualize the way the files in the app are connected, we suggest using this data visualizer. Below, it's showing the same repository, but instead of a directory structure, each file and folder as a circle: the circle’s color is the type of file, and the circle’s size represents the size of the file. See live demo
  here.
  

Features

• Cloud-Based Instances:
  • Option to choose between cloud hosted services and local services, giving Chronos the ability to monitor instances and clusters on AWS EC2, ECS, and EKS platforms
• Local instances utilitizing @chronosmicro/tracker NPM package:
  • Enables distributed tracing enabled across microservices applications
  • Displays real-time temperature, speed, latency, and memory statistics for local services
  • Displays and compares multiple microservice metrics in a single graph
  • Allow Kubernetes and Docker monitoring via Prometheus server and Grafana visualization.
  • Compatible with
  • Monitor an cluster via the JMX Prometheus Exporter
  • Supports and databases

Installation

This is for the latest Chronos version 13.0 release.

NPM Package

In order to use Chronos within your own application, you must have the @chronosmicro/tracker dependency installed.

The @chronosmicro/tracker package tracks your application's calls and scrapes metrics from your system.

• NOTE: The Chronos tracker code is included in the chronos_npm_package folder for ease of development, but the published NPM package can be downloaded by running npm install @chronosmicro/tracker.

For more details on the NPM package and instructions for how to use it, please view the Chronos NPM Package README.

Chronos Desktop Application

Running the Chronos desktop app in development mode (WSL Incompatible)

1. From the root directory, run npm install
2. Run npm run start:electron to start the electron app.
3. Run npm audit fix or npm audit fix --force if prompted
4. Refer to Examples sections below to spin up example applications.
   (Recommended):
   If you have mongo community edition running locally just run npm run start:microservices to start populating database with server data(more detail in Microservices Example section).

Packing the Chronos desktop app into an executable

1. From the root directory, run npm run build
2. Run npm run package
3. Find the chronos.app executable inside the newly created release-builds folder in the root directory.

Creating User Database

NOTE: You must create your own user database for extended features

1. Create a MongoDB database in which to store user information and insert it on line 2 within the UserModel.ts (electron/models/UserModel.ts) file.
   • This database will privately store user information.
2. Once this is set up, you can create new users, log in, and have your data persist between sessions.

Examples

We provide eight example applications for you to test out both the Chronos NPM package and the Chronos desktop application:

• AWS
  • EC2 README
  • ECS README
  • EKS README
• Docker
  • Docker README
• gRPC
  • gRPC README
• Kubernetes
  • Kubernetes README
• Microservices
  • Microservices README

Additional documentation on how Chronos is used in each example can be found in the Chronos NPM Package README.

AWS

The AWS folder includes 3 example applications with instructions on how to deploy them in AWS platforms. Note that using AWS services may cause charges.

• The ECS folder includes an web application ready to be containerized using Docker. The instruction shows how to deploy application to ECS using Docker CLI command, and it will be managed by Fargate services.
• The EC2 folder includes a React/Redux/SQL web application ready to be containerized using Docker. The instruction shows how to deploy application using AWS Beanstalk and connect application to RDS database. Beanstalk service will generate EC2 instance.
• The EKS folder includes a containerized note taking app that uses a Mongo database as its persistent volume. The instructions show how to deploy this application on EKS, how to monitor with Prometheus & Opencost, and how to use Grafana to grab visualizations.

Refer to the EC2 README, ECS README, and EKS README example in the AWS folder for more details.

Docker

In the folder within the master branch, we provide a sample dockerized microservices application to test out Chronos and to apply distributed tracing across different containers for your testing convenience.

The docker folder includes individual files in their respective directories. A docker-compose.yml is in the root directory in case you'd like to deploy all services together.

Refer to the Docker README in the docker folder for more details.

gRPC

The gRPC folder includes an HTML frontend and an Express server backend, as well as proto files necessary to build package definitions and make gRPC calls. The reverse_proxy folder contains the server that requires in the clients, which contain methods and services defined by proto files.

Refer to the gRPC README in the gRPC folder for more details.

Kubernetes

The kubernetes folder includes a React frontend and an Express server backend, and the Dockerfiles needed to containerize them for Kubernetes deployment. The launch folder includes the YAML files needed to configure the deployments, services, and configurations of the frontend, backend, Prometheus server, and Grafana.

Refer to the Kubernetes README in the kubernetes folder for more details.

Microservices

In the microservices folder, we provide a sample microservice application that successfully utilizes Chronos to apply all the powerful, built-in features of our monitoring tool. You can then visualize the data with the app.

Refer to the microservices README in the microservices folder for more details.

Testing

We've created testing suites for Chronos with React Testing, Jest, and Selenium for unit, integration, and end-to-end tests - instructions on running them can be found in the testing README.

Contributing

Development of Chronos is open source on GitHub through the tech accelerator OS Labs, and we are grateful to the community for contributing bug fixes and improvements.

Read our contributing README to learn how you can take part in improving Chronos.

Past Contributors

Technologies

License

MIT

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