Hello,

We added a new feature to the ndb_redis module, similar to how the rtpengine_disable_tout parameter of the rtpengine module works.

If a number of consecutive commands to a redis server fail, that server is temporarily disabled. This is configurable by parameters: "allowed_timeouts" and "disable_time".
Disabling a server means that for "disable_time" seconds any command to that sever will not send the command to the server, but an error is returned instead.

For example if allowed_timeouts is configured to 0 and disable_time to 30, the first time redis_cmd or redis_execute functions fail the server will be disabled for 30 seconds.

The server information is retained by each Kamailio process individually, so this means that disabling a server is done by that process only and not globally.

You can view, comment on, or merge this pull request online at:

  https://github.com/kamailio/kamailio/pull/1116

Commit Summary

• ndb_redis: add disable server on failure feature

File Changes

• M src/modules/ndb_redis/doc/ndb_redis_admin.xml (58)
• M src/modules/ndb_redis/ndb_redis_mod.c (4)
• M src/modules/ndb_redis/redis_client.c (77)
• M src/modules/ndb_redis/redis_client.h (9)

Patch Links:

• https://github.com/kamailio/kamailio/pull/1116.patch
• https://github.com/kamailio/kamailio/pull/1116.diff

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