Briefly, this error occurs when the specified S3 storage class in Elasticsearch snapshot repository configuration is not recognized by AWS. The storage class could be misspelled or not supported. To resolve this issue, ensure that the storage class is one of the following: STANDARD, REDUCED_REDUNDANCY, STANDARD_IA, ONEZONE_IA, INTELLIGENT_TIERING, GLACIER, or DEEP_ARCHIVE. Also, check for any typographical errors in the storage class name.
This guide will help you check for common problems that cause the log ” `” + storageClass + “` is not a valid S3 Storage Class. ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: repository-s3, storage, repositories.
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 type | Configuration type |
|---|---|
| Shared file system | Type: “fs” |
| S3 | Type : “s3” |
| HDFS | Type :“hdfs” |
| Azure | Type: “azure” |
| Google Cloud Storage | Type : “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.
Log Context
Log “`” + storageClass + “` is not a valid S3 Storage Class.” class name is S3BlobStore.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :
throw new BlobStoreException("Glacier storage class is not supported");
} return _storageClass;
} catch (final IllegalArgumentException illegalArgumentException) {
throw new BlobStoreException("`" + storageClass + "` is not a valid S3 Storage Class.");
}
} /**
* Constructs canned acl from string
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