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Docs - add verbage to anti-entropy page.

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Shawn Cook 2015-09-11 14:27:54 -07:00
parent 7c85d588d5
commit 7d6f30da1c
2 changed files with 16 additions and 1 deletions
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website/source/docs/agent/services.html.markdown
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@ -90,7 +90,8 @@ the same service their `enableTagOverride` configuration and all other service
configuration items are independant of one another. Updating the tags for configuration items are independant of one another. Updating the tags for
the service registered on one node is independant of the same service (by name) the service registered on one node is independant of the same service (by name)
registered on another node. If `enableTagOverride` is not specified the default registered on another node. If `enableTagOverride` is not specified the default
value is false. value is false. See [anti-entropy syncs](/docs/internals/anti-entropy.html)
for more info.
To configure a service, either provide it as a `-config-file` option to the To configure a service, either provide it as a `-config-file` option to the
agent or place it inside the `-config-dir` of the agent. The file must agent or place it inside the `-config-dir` of the agent. The file must

14
website/source/docs/internals/anti-entropy.html.markdown
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@ -135,3 +135,17 @@ fashion.
If an error is encountered during an anti-entropy run, the error is logged and If an error is encountered during an anti-entropy run, the error is logged and
the agent continues to run. The anti-entropy mechanism is run periodically to the agent continues to run. The anti-entropy mechanism is run periodically to
automatically recover from these types of transient failures. automatically recover from these types of transient failures.
### EnableTagOverride
Synchronization of service registration can be partially modified to allow
external agents change the tag value of a service. This can be useful in
situations where an external monitoring service needs to be the source of
truth for tag information. For instance: Redis DB and its monitoring service
Redis Sentinel have this kind of relationship. Redis instances are responsible
for much of their configuration, but Sentinels determine whether the Redis
instance is a master or a slave. Using the Consul service configuration item
[EnableTagOverride](/docs/agent/services.html) you can instruct the Consul
agent on which the Redis DB is running to NOT update the tags during anti-entropy
synchronization. For more information see [Services](/docs/agent/services.html)
page.