Explain data stream lifecycleedit
This 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 stream lifecycle status for one or more data stream backing indices.
Prerequisitesedit
If the Elasticsearch security features are enabled, you must have at least the manage_data_stream_lifecycle index privilege or
view_index_metadata index privilege to use this API. For more information, see Security privileges.
Requestedit
GET <target>/_lifecycle/explain
Descriptionedit
Retrieves information about the index or data stream’s current data stream 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 parametersedit
-
<target> - (Required, string) Comma-separated list of indices or data streams.
Query parametersedit
-
include_defaults -
(Optional, Boolean) Includes default configurations related to the lifecycle of the target.
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.
Examplesedit
If you want to retrieve the lifecycle state of all the backing indices of a data stream, you can use the data stream name.
For simplicity, the following example retrieves the lifecycle state of one backing index .ds-metrics-2023.03.22-000001:
response = client.indices.explain_data_lifecycle( index: '.ds-metrics-2023.03.22-000001' ) puts response
GET .ds-metrics-2023.03.22-000001/_lifecycle/explain
If the index is managed by a data stream lifecycle explain will show the managed_by_lifecycle 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_lifecycle" : 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 data stream lifecycle. If the index is not managed by a data stream lifecycle 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_lifecycle" : true,
"index_creation_date_millis" : 1679475563571,
"time_since_index_creation" : "843ms",
"lifecycle" : {
"enabled": true
},
"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;\"}"
}
}