Add index.routing.allocation.include._tier_preference setting #62589
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This commit adds the `index.routing.allocation.prefer._tier` setting to the `DataTierAllocationDecider`. This special-purpose allocation setting lets a user specify a preference-based list of tiers for an index to be assigned to. For example, if the setting were set to: ``` "index.routing.allocation.prefer._tier": "data_hot,data_warm,data_content" ``` If the cluster contains any nodes with the `data_hot` role, the decider will only allow them to be allocated on the `data_hot` node(s). If there are no `data_hot` nodes, but there are `data_warm` and `data_content` nodes, then the index will be allowed to be allocated on `data_warm` nodes. This allows us to specify an index's preference for tier(s) without causing the index to be unassigned if no nodes of a preferred tier are available. Subsequent work will change the ILM migration to make additional use of this setting. Relates to elastic#60848
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Pinging @elastic/es-core-features (:Core/Features/Features) |
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Since this setting is not part of the existing preference group, we need to handle backwards compatibility. I think we have a couple of options here:
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andreidan
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Thanks for working on this Lee.
I've left a couple of rather minor suggestions.
Can you please add some tests to show illustrate the include/exclude/require precedence over preferred?
.../main/java/org/elasticsearch/xpack/cluster/routing/allocation/DataTierAllocationDecider.java
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Thanks Andrei, I made the changes you suggested |
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@elasticmachine run elasticsearch-ci/packaging-sample-windows |
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@elasticmachine update branch |
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@elasticmachine test this please |
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@elasticmachine run elasticsearch-ci/2 |
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This commit adds the `index.routing.allocation.prefer._tier` setting to the `DataTierAllocationDecider`. This special-purpose allocation setting lets a user specify a preference-based list of tiers for an index to be assigned to. For example, if the setting were set to: ``` "index.routing.allocation.prefer._tier": "data_hot,data_warm,data_content" ``` If the cluster contains any nodes with the `data_hot` role, the decider will only allow them to be allocated on the `data_hot` node(s). If there are no `data_hot` nodes, but there are `data_warm` and `data_content` nodes, then the index will be allowed to be allocated on `data_warm` nodes. This allows us to specify an index's preference for tier(s) without causing the index to be unassigned if no nodes of a preferred tier are available. Subsequent work will change the ILM migration to make additional use of this setting. Relates to elastic#60848
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…62589) (#62667) This commit adds the `index.routing.allocation.prefer._tier` setting to the `DataTierAllocationDecider`. This special-purpose allocation setting lets a user specify a preference-based list of tiers for an index to be assigned to. For example, if the setting were set to: ``` "index.routing.allocation.prefer._tier": "data_hot,data_warm,data_content" ``` If the cluster contains any nodes with the `data_hot` role, the decider will only allow them to be allocated on the `data_hot` node(s). If there are no `data_hot` nodes, but there are `data_warm` and `data_content` nodes, then the index will be allowed to be allocated on `data_warm` nodes. This allows us to specify an index's preference for tier(s) without causing the index to be unassigned if no nodes of a preferred tier are available. Subsequent work will change the ILM migration to make additional use of this setting. Relates to #60848
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This commit adds the
index.routing.allocation.include._tier_preferencesetting to theDataTierAllocationDecider. This special-purpose allocation setting lets a user specify apreference-based list of tiers for an index to be assigned to. For example, if the setting were set
to:
If the cluster contains any nodes with the
data_hotrole, the decider will only allow them to beallocated on the
data_hotnode(s). If there are nodata_hotnodes, but there aredata_warmanddata_contentnodes, then the index will be allowed to be allocated ondata_warmnodes.This allows us to specify an index's preference for tier(s) without causing the index to be
unassigned if no nodes of a preferred tier are available.
Subsequent work will change the ILM migration to make additional use of this setting.
Relates to #60848