Stats Over HTTP Plugin¶
This plugin implements an HTTP interface to all Traffic Server statistics. The metrics returned are in a JSON format by default, for easy processing. You can also output the stats in CSV format as well. This plugin is now part of the standard ATS build process, and should be available after install.
Enabling Stats Over HTTP¶
To enable this plugin, add to the
After starting Traffic Server, the JSON metrics are now available on the default URL:
where host and port is the hostname/IP and port number of the server.
This option causes the plugin to emit floating point and integral metric values as JSON numbers, rather then JSON strings. This can cause interoperability problems since integer metrics have a 64-bit unsigned range.
This option wraps 64-bit unsigned values to the 64-bit signed range. This aids interoperability with Java, since prior to the Java SE 8 release, Java did not have a 64-bit unsigned type.
You can optionally modify the path to use, and this is highly recommended in a public facing server. For example:
and the URL would then be e.g.:
This is weak security at best, since the secret could possibly leak if you are careless and send it over clear text.
Config File Usage¶
stats_over_http.so also accepts a configuration file taken as a parameter
The plugin first checks if the parameter that was passed in is a file that exists, if so it uses that as a config file, otherwise if a parameter exists it assumes that it is meant to be used a path value (as if you were not using a config file)
You can add comments to the config file, starting with a # value
Other options you can specify:
This sets the path value for stats
A comma separated list of IPv4 addresses allowed to access the endpoint
A comma separated list of IPv6 addresses allowed to access the endpoint
By default stats_over_http.so will output all the stats in JSON format. However
if you wish to have it in CSV format you can do so by passing an
In either case the
Content-Type header returned by stats_over_http.so will reflect
the content that has been returned, either