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These are the highlights of new features or additions to existing features in v5.0.x, 5.1.x, and 5.2.x. For the complete list of all changes see this JIRA Release Notes.

General changes

HTTP/2

HTTP/2 in this release is stable. Not everything from the H2 specifications is supported. In particular

  • Priorities
  • Server PUSH
  • HTTP/2 over non-TLS

are not supported. In addition, HTTP/2 is only supported on the client side, outbound HTTP/2 is not supported yet (i.e. we only support proxying H2 to an HTTP/1.1 backend server (origin)). For some details on the implementation, see the TS-2729 Jira.

The following records.config settings are needed to enable HTTP/2 on trafficserver in 5.3.x.

       CONFIG proxy.config.http2.enabled INT 1

Additionally, there should be at least one TLS port configured in proxy.config.http.server_ports.

For example, 

       CONFIG proxy.config.http.server_ports STRING 80 443:ssl

New configuration options

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Metrics

Plugin Improvements

 

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