Explain Lifecycle API
editExplain Lifecycle API
editThis functionality is in technical preview and may be changed or removed in a future release. Elastic will work to fix any issues, but features in technical preview are not subject to the support SLA of official GA features.
Retrieves the current data lifecycle status for one or more data stream backing indices.
Request
editGET <target>/_lifecycle/explain
Description
editRetrieves information about the index’s current DLM lifecycle state, such as time since index creation, time since rollover, the lifecycle configuration managing the index, or any error that Elasticsearch might’ve encountered during the lifecycle execution.
Path parameters
edit-
<target> - (Required, string) Comma-separated list of indices.
Query parameters
edit-
include_defaults -
(Optional, Boolean) Includes default configurations related to the lifecycle of the target index.
Defaults to
false. -
master_timeout -
(Optional, time units)
Period to wait for a connection to the master node. If no response is received
before the timeout expires, the request fails and returns an error. Defaults to
30s. -
timeout -
(Optional, time units)
Period to wait for a response. If no response is received before the timeout
expires, the request fails and returns an error. Defaults to
30s.
Examples
editThe following example retrieves the lifecycle state of the index .ds-metrics-2023.03.22-000001:
GET .ds-metrics-2023.03.22-000001/_lifecycle/explain
If the index is managed by DLM explain will show the managed_by_dlm field
set to true and the rest of the response will contain information about the
lifecycle execution status for this index:
{
"indices": {
".ds-metrics-2023.03.22-000001": {
"index" : ".ds-metrics-2023.03.22-000001",
"managed_by_dlm" : true,
"index_creation_date_millis" : 1679475563571,
"time_since_index_creation" : "843ms",
"rollover_date_millis" : 1679475564293,
"time_since_rollover" : "121ms",
"lifecycle" : { },
"generation_time" : "121ms"
}
}
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Shows if the index is being managed by DLM. If the index is not managed by DLM the other fields will not be shown |
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When the index was created, this timestamp is used to determine when to rollover |
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The time since the index creation (used for calculating when to rollover
the index via the |
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When the index was rolled over. If the index was not rolled over this will not be shown. |
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The time since rollover. If the index was not rolled over this will not be shown. |
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The lifecycle configuration that applies to this index (which is configured on the parent data stream) |
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The generation time of the index represents the time since the index started progressing
towards the user configurable / business specific parts of the lifecycle (e.g. retention).
The |
The explain will also report any errors related to the lifecycle execution for the target
index:
{
"indices": {
".ds-metrics-2023.03.22-000001": {
"index" : ".ds-metrics-2023.03.22-000001",
"managed_by_dlm" : true,
"index_creation_date_millis" : 1679475563571,
"time_since_index_creation" : "843ms",
"lifecycle" : { },
"error": "{\"type\":\"validation_exception\",\"reason\":\"Validation Failed: 1: this action would add [2] shards, but this cluster
currently has [4]/[3] maximum normal shards open;\"}"
}
}