You're viewing version 2.12 of the OpenSearch documentation. This version is no longer maintained. For the latest version, see the current documentation. For information about OpenSearch version maintenance, see Release Schedule and Maintenance Policy.
Snapshot Management API
Use the snapshot management (SM) API to automate taking snapshots.
Table of contents
Create or update a policy
Introduced 2.1
Creates or updates an SM policy.
Request
Create:
POST _plugins/_sm/policies/<policy_name>
Update:
PUT _plugins/_sm/policies/<policy_name>?if_seq_no=0&if_primary_term=1
You must provide the seq_no and primary_term parameters for an update request.
Example
POST _plugins/_sm/policies/daily-policy
{
"description": "Daily snapshot policy",
"creation": {
"schedule": {
"cron": {
"expression": "0 8 * * *",
"timezone": "UTC"
}
},
"time_limit": "1h"
},
"deletion": {
"schedule": {
"cron": {
"expression": "0 1 * * *",
"timezone": "America/Los_Angeles"
}
},
"condition": {
"max_age": "7d",
"max_count": 21,
"min_count": 7
},
"time_limit": "1h"
},
"snapshot_config": {
"date_format": "yyyy-MM-dd-HH:mm",
"timezone": "America/Los_Angeles",
"indices": "*",
"repository": "s3-repo",
"ignore_unavailable": "true",
"include_global_state": "false",
"partial": "true",
"metadata": {
"any_key": "any_value"
}
},
"notification": {
"channel": {
"id": "NC3OpoEBzEoHMX183R3f"
},
"conditions": {
"creation": true,
"deletion": false,
"failure": false,
"time_limit_exceeded": false
}
}
}
Response
{
"_id" : "daily-policy-sm-policy",
"_version" : 5,
"_seq_no" : 54983,
"_primary_term" : 21,
"sm_policy" : {
"name" : "daily-policy",
"description" : "Daily snapshot policy",
"schema_version" : 15,
"creation" : {
"schedule" : {
"cron" : {
"expression" : "0 8 * * *",
"timezone" : "UTC"
}
},
"time_limit" : "1h"
},
"deletion" : {
"schedule" : {
"cron" : {
"expression" : "0 1 * * *",
"timezone" : "America/Los_Angeles"
}
},
"condition" : {
"max_age" : "7d",
"min_count" : 7,
"max_count" : 21
},
"time_limit" : "1h"
},
"snapshot_config" : {
"indices" : "*",
"metadata" : {
"any_key" : "any_value"
},
"ignore_unavailable" : "true",
"timezone" : "America/Los_Angeles",
"include_global_state" : "false",
"date_format" : "yyyy-MM-dd-HH:mm",
"repository" : "s3-repo",
"partial" : "true"
},
"schedule" : {
"interval" : {
"start_time" : 1656425122909,
"period" : 1,
"unit" : "Minutes"
}
},
"enabled" : true,
"last_updated_time" : 1656425122909,
"enabled_time" : 1656425122909,
"notification" : {
"channel" : {
"id" : "NC3OpoEBzEoHMX183R3f"
},
"conditions" : {
"creation" : true,
"deletion" : false,
"failure" : false,
"time_limit_exceeded" : false
}
}
}
}
Parameters
You can specify the following parameters to create/update an SM policy.
| Parameter | Type | Description |
|---|---|---|
description | String | The description of the SM policy. Optional. |
enabled | Boolean | Should this SM policy be enabled at creation? Optional. |
snapshot_config | Object | The configuration options for snapshot creation. Required. |
snapshot_config.date_format | String | Snapshot names have the format <policy_name>-<date>-<random number>. date_format specifies the format for the date in the snapshot name. Supports all date formats supported by OpenSearch. Optional. Default is “yyyy-MM-dd’T’HH:mm:ss”. |
snapshot_config.date_format_timezone | String | Snapshot names have the format <policy_name>-<date>-<random number>. date_format_timezone specifies the time zone for the date in the snapshot name. Optional. Default is UTC. |
snapshot_config.indices | String | The names of the indexes in the snapshot. Multiple index names are separated by ,. Supports wildcards (*). Optional. Default is * (all indexes). |
snapshot_config.repository | String | The repository in which to store snapshots. Required. |
snapshot_config.ignore_unavailable | Boolean | Do you want to ignore unavailable indexes? Optional. Default is false. |
snapshot_config.include_global_state | Boolean | Do you want to include cluster state? Optional. Default is true because of Security plugin considerations. |
snapshot_config.partial | Boolean | Do you want to allow partial snapshots? Optional. Default is false. |
snapshot_config.metadata | Object | Metadata in the form of key/value pairs. Optional. |
creation | Object | Configuration for snapshot creation. Required. |
creation.schedule | String | The cron schedule used to create snapshots. Required. |
creation.time_limit | String | Sets the maximum time to wait for snapshot creation to finish. If time_limit is longer than the scheduled time interval for taking snapshots, no scheduled snapshots are taken until time_limit elapses. For example, if time_limit is set to 35 minutes and snapshots are taken every 30 minutes starting at midnight, the snapshots at 00:00 and 01:00 are taken, but the snapshot at 00:30 is skipped. Optional. |
deletion | Object | Configuration for snapshot deletion. Optional. Default is to retain all snapshots. |
deletion.schedule | String | The cron schedule used to delete snapshots. Optional. Default is to use creation.schedule, which is required. |
deletion.time_limit | String | Sets the maximum time to wait for snapshot deletion to finish. Optional. |
deletion.delete_condition | Object | Conditions for snapshot deletion. Optional. |
deletion.delete_condition.max_count | Integer | The maximum number of snapshots to be retained. Optional. |
deletion.delete_condition.max_age | String | The maximum time a snapshot is retained. Optional. |
deletion.delete_condition.min_count | Integer | The minimum number of snapshots to be retained. Optional. Default is one. |
notification | Object | Defines notifications for SM events. Optional. |
notification.channel | Object | Defines a channel for notifications. You must create and configure a notification channel before setting up SM notifications. Required. |
notification.channel.id | String | The channel ID of the channel used for notifications. To get the channel IDs of all created channels, use GET _plugins/_notifications/configs. Required. |
notification.conditions | Object | SM events you want to be notified about. Set the ones you are interested in to true. |
notification.conditions.creation | Boolean | Do you want notifications about snapshot creation? Optional. Default is true. |
notification.conditions.deletion | Boolean | Do you want notifications about snapshot deletion? Optional. Default is false. |
notification.conditions.failure | Boolean | Do you want notifications about creation or deletion failure? Optional. Default is false. |
notification.conditions.time_limit_exceeded | Boolean | Do you want notifications when snapshot operations take longer than time_limit? Optional. Default is false. |
Get policies
Introduced 2.1
Gets SM policies.
Request
Get all SM policies:
GET _plugins/_sm/policies
You can use a query string and specify pagination, the field to be sorted by, and sort order:
GET _plugins/_sm/policies?from=0&size=20&sortField=sm_policy.name&sortOrder=desc&queryString=*
Get a specific SM policy:
GET _plugins/_sm/policies/<policy_name>
Example
GET _plugins/_sm/policies/daily-policy
Response
{
"_id" : "daily-policy-sm-policy",
"_version" : 6,
"_seq_no" : 44696,
"_primary_term" : 19,
"sm_policy" : {
"name" : "daily-policy",
"description" : "Daily snapshot policy",
"schema_version" : 15,
"creation" : {
"schedule" : {
"cron" : {
"expression" : "0 8 * * *",
"timezone" : "UTC"
}
},
"time_limit" : "1h"
},
"deletion" : {
"schedule" : {
"cron" : {
"expression" : "0 1 * * *",
"timezone" : "America/Los_Angeles"
}
},
"condition" : {
"max_age" : "7d",
"min_count" : 7,
"max_count" : 21
},
"time_limit" : "1h"
},
"snapshot_config" : {
"metadata" : {
"any_key" : "any_value"
},
"ignore_unavailable" : "true",
"include_global_state" : "false",
"date_format" : "yyyy-MM-dd-HH:mm",
"repository" : "s3-repo",
"partial" : "true"
},
"schedule" : {
"interval" : {
"start_time" : 1656341042874,
"period" : 1,
"unit" : "Minutes"
}
},
"enabled" : true,
"last_updated_time" : 1656341042874,
"enabled_time" : 1656341042874
}
}
Explain
Introduced 2.1
Provides the enabled/disabled status and the metadata for all policies specified. Multiple policy names are separated with ,. You can also specify desired policies with a wildcard pattern.
SM uses a state machine for snapshot creation and deletion. The image on the left shows one execution period of the creation workflow, from the CREATION_START state to the CREATION_FINISHED state. Deletion workflow follows the same pattern as creation workflow.
The creation workflow starts in the CREATION_START state and continuously checks if the conditions in the creation cron schedule are met. After the conditions are met, the creation workflow switches to the CREATION_CONDITION_MET state and continues to the CREATING state. The CREATING state calls the create snapshot API asynchronously and then waits for snapshot creation to end in the CREATION_FINISHED state. Once snapshot creation ends, the creation workflow goes back to the CREATION_START state, and the cycle continues. The current_state field of metadata.creation and metadata.deletion returns the current state of the state machine.
Request
GET _plugins/_sm/policies/<policy_names>/_explain
Example
GET _plugins/_sm/policies/daily*/_explain
Response
{
"policies" : [
{
"name" : "daily-policy",
"creation" : {
"current_state" : "CREATION_START",
"trigger" : {
"time" : 1656403200000
}
},
"deletion" : {
"current_state" : "DELETION_START",
"trigger" : {
"time" : 1656403200000
}
},
"policy_seq_no" : 44696,
"policy_primary_term" : 19,
"enabled" : true
}
]
}
The following table lists all fields for each policy in the response.
| Field | Description |
|---|---|
name | The name of the SM policy. |
creation | Information about the latest creation operation. See subfields below. |
deletion | Information about the latest deletion operation. See subfields below. |
policy_seq_no policy_primary_term | The version of the SM policy. |
enabled | Is the policy running? |
The following table lists all fields in the creation and deletion objects of each policy.
| Field | Description |
|---|---|
current_state | The current state of the state machine that runs snapshot creation/deletion as described above. |
trigger.time | The next creation/deletion execution time in milliseconds since the epoch. |
latest_execution | Describes the latest creation/deletion execution. |
latest_execution.status | The execution status of the latest creation/deletion. Possible values are:IN_PROGRESS: Snapshot creation/deletion has started. SUCCESS: Snapshot creation/deletion has finished successfully. RETRYING: The creation/deletion attempt has failed. It will be retried three times. FAILED: The creation/deletion attempt failed after three retries. End the current execution period and go to the next execution period. TIME_LIMIT_EXCEEDED: The creation/deletion time exceeded the time_limit set in the policy. End the current execution period and go to the next execution period. |
latest_execution.start_time | The start time of the latest execution in milliseconds since the epoch. |
latest_execution.end_time | The end time of the latest execution in milliseconds since the epoch. |
latest_execution.info.message | A user-friendly message describing the status of the latest execution. |
latest_execution.info.cause | Contains the failure reason if the latest execution fails. |
retry.count | The number of remaining execution retry attempts. |
Start a policy
Introduced 2.1
Starts the policy by setting its enabled flag to true.
Request
POST _plugins/_sm/policies/<policy_name>/_start
Example
POST _plugins/_sm/policies/daily-policy/_start
Response
{
"acknowledged" : true
}
Stop a policy
Introduced 2.1
Sets the enabled flag to false for an SM policy. The policy will not run until you start it.
Request
POST _plugins/_sm/policies/<policy_name>/_stop
Example
POST _plugins/_sm/policies/daily-policy/_stop
Response
{
"acknowledged" : true
}
Delete a policy
Introduced 2.1
Deletes the specified SM policy.
Request
DELETE _plugins/_sm/policies/<policy_name>
Example
DELETE _plugins/_sm/policies/daily-policy
Response
{
"_index" : ".opendistro-ism-config",
"_id" : "daily-policy-sm-policy",
"_version" : 8,
"result" : "deleted",
"forced_refresh" : true,
"_shards" : {
"total" : 2,
"successful" : 2,
"failed" : 0
},
"_seq_no" : 45366,
"_primary_term" : 20
}