Boaz Leskes 1227044ddd Add a deprecation notice to shadow replicas (#22647)
Relates to #22024

On top of documentation, the PR adds deprecation loggers and deals with the resulting warning headers.

The yaml test is set exclude versions up to 6.0. This is need to make sure bwc tests pass until this is backported to 5.2.0 . Once that's done, I will change the yaml test version limits
2017-01-18 12:28:09 +01:00

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[[breaking_60_indices_changes]]
=== Templates changes
==== `template` is now `index_patterns`
Previously templates expressed the indices that they should match using a glob
style pattern in the `template` field. They should now use the `index_patterns`
field instead. As the name implies you can define multiple glob style patterns
in an array but for convenience defining a single pattern as a bare string is
also supported. So both of these examples are valid:
[source,js]
--------------------------------------------------
PUT _template/template_1
{
"index_patterns": ["te*", "bar*"],
"settings": {
"number_of_shards": 1
}
}
PUT _template/template_2
{
"index_patterns": "te*",
"settings": {
"number_of_shards": 1
}
}
--------------------------------------------------
// CONSOLE
=== Shadow Replicas are deprecated
<<indices-shadow-replicas,Shadow Replicas>> don't see much usage and we are planning to remove them.