プラグイン¶
概要¶
Apache Traffic Server™ の重要な機能の一つはモジュール性です。コアに不要な機能はコアの中には存在しません。これは良いことです。なぜならば、それはコアが常に提供するキャッシュとプロキシーに集中することにより、速い状態を保つことができるからです。
他の全ての機能はプラグインに移すことができます。安定した C API を使うことにより、コアに触ること無く、誰でも独自の機能を実装することができます。
安定したプラグイン¶
安定的なプラグインです。これらは Traffic Server のリリースにデフォルトでインストールされれています。
- AuthProxy
- Delegates the authorization decision of a request to an external HTTP service.
- AWS S3 Authentication
- Support for Amazon S3 authentication features.
- Background Fetch
- Proactively fetch content from Origin in a way that it will fill the object into cache.
- Combo Handler
- Provides an intelligent way to combine multiple URLs into a single URL, and have Apache Traffic Server combine the components into one response.
- Configuration Remap
- Override configuration directives on a per-rule basis.
- ESI
- Implements the Edge Side Includes (ESI) specification.
- Generator
- Generate arbitrary response data.
- GZip
- Compress or deflate cache responses.
- Header Rewrite
- Modify requests and responses based on incoming and outgoing headers and other transaction attributes.
- Health Checks
- Define service health check links.
- Regex Remap
- Configure remapping rules using regular expressions.
- Regex Revalidate
- Configurable rules for forcing cache object revalidations using regular expressions.
- Stats over HTTP
- Provide an HTTP interface to all Traffic Server statistics.
- TCPInfo
- Log TCP metrics at various points of the HTTP processing pipeline.
- XDebug
- Allows HTTP clients to debug the operation of the Traffic Server cache using the X-Debug header.
実験的なプラグイン¶
Plugins that are considered experimental are located in the plugins/experimental directory of the Traffic Server source tree. Experimental plugins can be compiled by passing the --enable-experimental-plugins option to configure:
$ autoconf -i
$ ./configure --enable-experimental-plugins
$ make
- Balancer
- Balances requests across multiple origin servers.
- Buffer Upload
- Buffers POST data before connecting to the Origin server.
- Cache Key Manipulation
- Allows some common cache key manipulations based on various HTTP request elements.
- Cache Promote
- Provides additional control over when an object should be allowed into the cache.
- Collapsed-Forwarding
- Allows to Collapse multiple Concurrent requests by downloading once from the Origin and serving all clients in parallel.
- Epic
- Emits Traffic Server metrics in a format that is consumed by the Epic Network Monitoring System.
- Escalate
- Escalate: when the origin returns specific status codes, retry the request at a secondary origin (failover/fail-action)
- GeoIP ACL
- Deny or allow requests based on the source IP geo-location.
- Header Frequency
- Count the frequency of headers.
- HIPES
- Adds support for HTTP Pipes.
- Memcache
- Implements the memcache protocol for cache contents.
- Metalink
- Implements the Metalink download description format in order to try not to download the same file twice.
- Money Trace
- Allows Trafficserver to participate in a distributed tracing system based upon the Comcast Money library.
- MP4
- MP4 streaming media.
- MySQL Remap
- Allows dynamic remaps from a MySQL database.
- Remap Purge
- This remap plugin allows the administrator to easily setup remotely
controlled
PURGEfor the content of an entire remap rule. - Signed URLs
- Adds support for verifying URL signatures for incoming requests to either deny or redirect access.
- SSL Headers
- Populate request headers with SSL session information.
- Stale While Revalidate
deprecated: Refresh content asynchronously while serving stale data.
- TS Lua
- Allows plugins to be written in Lua instead of C code.
- WebP Transform
- Converts jpeg and png images to webp format.