Elasticsearch Repository

By Opster Team

Updated: Mar 10, 2024

| 1 min read

Overview

An Elasticsearch snapshot provides a backup mechanism that takes the current state and data in the cluster and saves it to a repository (read snapshot for more information). The backup process requires a repository to be created first. The repository needs to be registered using the _snapshot endpoint, and multiple repositories can be created per cluster. The following repository types are supported: 

Repository types

Repository typeConfiguration type
Shared file systemType: “fs”
S3Type : “s3”
HDFSType :“hdfs”
AzureType: “azure”
Google Cloud StorageType : “gcs”

Examples

To register an “fs” repository:

PUT _snapshot/my_repo_01
{
"type": "fs",
"settings": {
"location": "/mnt/my_repo_dir"
  }
}

Notes and good things to know

  • S3, HDFS, Azure and Google Cloud require a relevant plugin to be installed before it can be used for a snapshot.
  • The setting, path.repo: /mnt/my_repo_dir needs to be added to elasticsearch.yml on all the nodes if you are planning to use the repo type of file system. Otherwise, it will fail.
  • When using remote repositories, the network bandwidth and repository storage throughput should be high enough to complete the snapshot operations normally, otherwise you will end up with partial snapshots.

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Related log errors to this ES concept


Failure updating cluster state
Cannot close blob store
Found stale root level blobs Cleaning them up
Failed to clean up old shard generation blobs
Unknown blob in the repository
Store cannot be marked as corrupted
Failed to delete file during snapshot cleanup
Failed to list directory - some of files might not be deleted
Running cleanup operations on repository
Cannot parse the specified url
Hadoop authentication method is set to SIMPLE but a Kerberos principal is
Application Default Credentials are not supported out of the box

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