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within the same datacenter. mod_heartbeat generates multicast status messages with the current number of clients connected, but the formated can easily be extended to include other things. mod_heartmonitor collects these messages into a static file, which then can be used for other modules to make load balancing decisions on. This module was originally written at Joost by Sander Striker, Justin Erenkrantz, and myself. We have been given permission by our employer to contribute this module. git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@721952 13f79535-47bb-0310-9956-ffa450edef68
34 lines
996 B
Plaintext
34 lines
996 B
Plaintext
mod_heartbeat
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Broadcasts the current Apache Connection status over multicast.
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Example Configuration:
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HeartbeatAddress 239.0.0.1:27999
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Dependencies:
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mod_status must be either a static module, or if a dynamic module, it must be
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loaded before mod_heartbeat.
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Consuming:
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Every 1 second, this module generates a single multicast UDP packet,
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containing the number of busy and idle workers.
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The packet is a simple ASCII format, similiar to GET query parameters in UDP.
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An Example packet:
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v=1&ready=75&busy=0
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Consumers should handle new variables besides busy and ready, separated by '&'
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being added in the future.
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Misc:
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The interval of 1 seconds is controlled by the HEARTBEAT_INTERVAL
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compile time define. This is not currently tunable at run time. To make this
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module send the status packet more often, you must add to the CFLAGS used to
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compile the module to include:
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-DHEARTBEAT_INTERVAL=3
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Would cause the broadcasts to be sent every 3 seconds.
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