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Apache Traffic Control is an Open Source implementation of a Content Delivery Network

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# Apache Traffic Control

Apache Traffic Control allows you to build a large scale content delivery network using open source. Built around Apache Traffic Server as the caching software, Traffic Control implements all the core functions of a modern CDN.

[![Slack](https://img.shields.io/badge/slack-join_%23traffic--control-white.svg?logo=slack&style=social)](https://s.apache.org/tc-slack-request)
[![Twitter Follow](https://img.shields.io/twitter/follow/trafficctrlcdn?style=social&label=Follow%20@trafficctrlcdn)](https://twitter.com/intent/follow?screen_name=trafficctrlcdn)
[![Youtube Subscribe](https://img.shields.io/youtube/channel/subscribers/UC2zEj6sERinzx8w8uvyRBYg?style=social&label=Apache%20Traffic%20Control)](https://www.youtube.com/channel/UC2zEj6sERinzx8w8uvyRBYg)

[![GitHub release (latest SemVer)](https://img.shields.io/github/v/release/apache/trafficcontrol)](https://github.com/apache/trafficcontrol/releases)
![Github commits since release](https://img.shields.io/github/commits-since/apache/trafficcontrol/latest/master)

__Build Status__ [^1]

[![Build Status](https://github.com/apache/trafficcontrol/workflows/CDN-in-a-Box%20CI/badge.svg)](https://github.com/apache/trafficcontrol/actions/workflows/ciab.yaml?query=branch%3Amaster) 
[![Documentation Status](https://readthedocs.org/projects/traffic-control-cdn/badge/?version=latest)](http://traffic-control-cdn.readthedocs.io/en/latest/?badge=latest?query=branch%3Amaster)

__Code Status__ [^1]

[![Weasel License Checks](https://github.com/apache/trafficcontrol/workflows/Weasel%20License%20checks/badge.svg)](https://github.com/apache/trafficcontrol/actions/workflows/weasel.yml?query=branch%3Amaster) 
[![Go Formatting](https://github.com/apache/trafficcontrol/workflows/Go%20Format/badge.svg)](https://github.com/apache/trafficcontrol/actions/workflows/go.fmt.yml?query=branch%3Amaster) 
[![Go Vet](https://github.com/apache/trafficcontrol/workflows/Go%20Vet/badge.svg)](https://github.com/apache/trafficcontrol/actions/workflows/go.vet.yml?query=branch%3Amaster)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
[![CodeQL - C++](https://github.com/apache/trafficcontrol/workflows/CodeQL%20-%20C++/badge.svg)](https://github.com/apache/trafficcontrol/actions/workflows/codeql.cpp.yml?query=branch%3Amaster)
[![CodeQL - Go](https://github.com/apache/trafficcontrol/workflows/CodeQL%20-%20Go/badge.svg)](https://github.com/apache/trafficcontrol/actions/workflows/codeql.go.yml?query=branch%3Amaster)
[![CodeQL - Java](https://github.com/apache/trafficcontrol/workflows/CodeQL%20-%20Java/badge.svg)](https://github.com/apache/trafficcontrol/actions/workflows/codeql.java.yml?query=branch%3Amaster)
[![CodeQL - Javascript](https://github.com/apache/trafficcontrol/workflows/CodeQL%20-%20Javascript/badge.svg)](https://github.com/apache/trafficcontrol/actions/workflows/codeql.javascript.yml?query=branch%3Amaster)
[![CodeQL - Python](https://github.com/apache/trafficcontrol/workflows/CodeQL%20-%20Python/badge.svg)](https://github.com/apache/trafficcontrol/actions/workflows/codeql.python.yml?query=branch%3Amaster)

__Test Status__ [^1]

| Component      | Unit Tests                                                                                                                                                                                                                                                                                                                                                                                                                                                   | Integration Tests                                                                                                                                                                                                                                                                                                                                                                                                                            | 
|:---------------|:-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|:---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| 
| Go Libraries   | [![Go Lib Unit Tests](https://github.com/apache/trafficcontrol/actions/workflows/go.lib.unit.tests.yml/badge.svg?branch=master)](https://github.com/apache/trafficcontrol/actions/workflows/go.lib.unit.tests.yml?query=branch%3Amaster) [![Codecov](https://codecov.io/gh/apache/trafficcontrol/branch/master/graph/badge.svg?flag=golib_unit)](https://app.codecov.io/github/apache/trafficcontrol/tree/master/lib)                                        | -                                                                                                                                                                                                                                                                                                                                                                                                                                            | 
| Traffic Ops    | [![Traffic Ops Unit Tests](https://github.com/apache/trafficcontrol/actions/workflows/to.unit.tests.yml/badge.svg?branch=master)](https://github.com/apache/trafficcontrol/actions/workflows/to.unit.tests.yml?query=branch%3Amaster) [![Codecov](https://codecov.io/gh/apache/trafficcontrol/branch/master/graph/badge.svg?flag=traffic_ops_unit)](https://app.codecov.io/github/apache/trafficcontrol/tree/master/traffic_ops) [![Traffic Ops API Contract Tests](https://github.com/apache/trafficcontrol/actions/workflows/to.api.contract.tests.yml/badge.svg)](https://github.com/apache/trafficcontrol/actions/workflows/to.api.contract.tests.yml)                            | [![TO Go Client Integration Tests](https://github.com/apache/trafficcontrol/workflows/TO%20Go%20Client%20Integration%20Tests/badge.svg)](https://github.com/apache/trafficcontrol/actions/workflows/traffic-ops.yml?query=branch%3Amaster) [![Codecov](https://codecov.io/gh/apache/trafficcontrol/branch/master/graph/badge.svg?flag=traffic_ops_integration)](https://app.codecov.io/github/apache/trafficcontrol/tree/master/traffic_ops) | 
| Traffic Router | [![Traffic Router Tests](https://github.com/apache/trafficcontrol/workflows/Traffic%20Router%20Tests/badge.svg)](https://github.com/apache/trafficcontrol/actions/workflows/tr.tests.yaml?query=branch%3Amaster) [![Codecov](https://codecov.io/gh/apache/trafficcontrol/branch/master/graph/badge.svg?flag=traffic_router_unit)](https://app.codecov.io/github/apache/trafficcontrol/tree/master/traffic_router)                                            | [![TR Ultimate Test Harness](https://github.com/apache/trafficcontrol/workflows/TR%20Ultimate%20Test%20Harness/badge.svg)](https://github.com/apache/trafficcontrol/actions/workflows/tr-ultimate-test-harness.yml?query=branch%3Amaster)                                                                                                                                                                                                    |
| Traffic Monitor| [![Traffic Monitor Unit Tests](https://github.com/apache/trafficcontrol/actions/workflows/tm.unit.tests.yml/badge.svg?branch=master)](https://github.com/apache/trafficcontrol/actions/workflows/tm.unit.tests.yml?query=branch%3Amaster) [![Codecov](https://codecov.io/gh/apache/trafficcontrol/branch/master/graph/badge.svg?flag=traffic_monitor_unit)](https://app.codecov.io/github/apache/trafficcontrol/tree/master/traffic_monitor)                 | [![TM Integration Tests](https://github.com/apache/trafficcontrol/workflows/TM%20Integration%20Tests/badge.svg)](https://github.com/apache/trafficcontrol/actions/workflows/tm.integration.tests.yml?query=branch%3Amaster)                                                                                                                                                                                                                  |
| T3C            | [![T3C Unit Tests](https://github.com/apache/trafficcontrol/actions/workflows/cache-config.unit.tests.yml/badge.svg?branch=master)](https://github.com/apache/trafficcontrol/actions/workflows/cache-config.unit.tests.yml?query=branch%3Amaster) [![Codecov](https://codecov.io/gh/apache/trafficcontrol/branch/master/graph/badge.svg?flag=t3c_unit)](https://app.codecov.io/github/apache/trafficcontrol/tree/master/cache-config)                        | [![T3C Integration Tests](https://github.com/apache/trafficcontrol/workflows/T3C%20Integration%20Tests/badge.svg)](https://github.com/apache/trafficcontrol/actions/workflows/cache-config-tests.yml?query=branch%3Amaster)                                                                                                                                                                                                                  |
| Traffic Stats  | [![Traffic Stats Unit Tests](https://github.com/apache/trafficcontrol/actions/workflows/traffic-stats.unit.tests.yml/badge.svg?branch=master)](https://github.com/apache/trafficcontrol/actions/workflows/traffic-stats.unit.tests.yml?query=branch%3Amaster) [![Codecov](https://codecov.io/gh/apache/trafficcontrol/branch/master/graph/badge.svg?flag=traffic_stats_unit)](https://app.codecov.io/github/apache/trafficcontrol/tree/master/traffic_stats) | -                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| Grove          | [![Grove Unit Tests](https://github.com/apache/trafficcontrol/actions/workflows/grove.unit.tests.yml/badge.svg?branch=master)](https://github.com/apache/trafficcontrol/actions/workflows/grove.unit.tests.yml?query=branch%3Amaster) [![Codecov](https://codecov.io/gh/apache/trafficcontrol/branch/master/graph/badge.svg?flag=grove_unit)](https://app.codecov.io/github/apache/trafficcontrol/tree/master/grove)                                         | -                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| Traffic Portal | -                                                                                                                                                                                                                                                                                                                                                                                                                                                            | [![TP Integration Tests](https://github.com/apache/trafficcontrol/workflows/TP%20Integration%20Tests/badge.svg)](https://github.com/apache/trafficcontrol/actions/workflows/tp.integration.tests.yml?query=branch%3Amaster)                                                                                                                                                                                                                  |
| TCHC           | -                                                                                                                                                                                                                                                                                                                                                                                                                                                            | [![TC Health Client Integration Tests](https://github.com/apache/trafficcontrol/workflows/TC%20Health%20Client%20Integration%20Tests/badge.svg)](https://github.com/apache/trafficcontrol/actions/workflows/health-client-tests.yml?query=branch%3Amaster)                                                                                                                                                                                   |

---

## Documentation [^2]
* [Intro](http://traffic-control-cdn.readthedocs.io/en/latest/index.html)
* [CDN Basics](http://traffic-control-cdn.readthedocs.io/en/latest/basics/index.html)
* [Traffic Control Overview](http://traffic-control-cdn.readthedocs.io/en/latest/overview/index.html)
* [Administrator's Guide](http://traffic-control-cdn.readthedocs.io/en/latest/admin/index.html)
* [Developer's Guide](http://traffic-control-cdn.readthedocs.io/en/latest/development/index.html)
* [Traffic Ops API](https://traffic-control-cdn.readthedocs.io/en/latest/api/index.html)

## Components [^2]
* [Traffic Ops](https://traffic-control-cdn.readthedocs.io/en/latest/overview/traffic_ops.html) is the RESTful API service for management and monitoring of all servers in the CDN.
* [Traffic Portal](https://traffic-control-cdn.readthedocs.io/en/latest/overview/traffic_portal.html) is the web GUI for managing and monitoring the CDN via the Traffic Ops API.
* [Traffic Router](https://traffic-control-cdn.readthedocs.io/en/latest/overview/traffic_router.html) uses DNS and HTTP302 to redirect clients to the closest available cache on the CDN.
* [Traffic Monitor](https://traffic-control-cdn.readthedocs.io/en/latest/overview/traffic_monitor.html) uses HTTP to poll the health of caches and provide this information to Traffic Router.
* [Traffic Stats](https://traffic-control-cdn.readthedocs.io/en/latest/overview/traffic_stats.html) acquires and stores real-time metrics and statistics into an InfluxDB for charting and alerting.

## Releases
* [Releases](https://github.com/apache/trafficcontrol/releases)

## Downloads
* [Downloads](https://www.apache.org/dyn/closer.cgi/trafficcontrol)

## Questions, Comments, Bugs and More
* [Frequently Asked Questions](https://traffic-control-cdn.readthedocs.io/en/latest/faq.html)
* [Found a bug or file a feature request](https://github.com/apache/trafficcontrol/issues)
* [Subscribe to our users list](mailto:users-subscribe@trafficcontrol.apache.org)
* [Subscribe to our dev list](mailto:dev-subscribe@trafficcontrol.apache.org)
* [Search the email archives](https://lists.apache.org/list.html?dev@trafficcontrol.apache.org)
* [Check out the wiki](https://cwiki.apache.org/confluence/display/TC/Traffic+Control+Home) for less formal documentation, design docs and roadmap discussions

[^1]: *Status links point to the unreleased *master* branch

[^2]: *Documentation links point to the __latest__ which is the unreleased master branch and are neither stable nor necessarily accurate for any given supported release.*

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