FAQ and recommendations for restoring services

These recommendations were updated on October 16, 2026, 17:50 (Moscow time). This information is up to date.

Our support service is currently responding to a large number of your requests.

Processing them will take time, so we decided to prepare answers to the most common questions, along with recommendations for restoring individual services. Please consider them when working with your resources and backups.

General

Due to restrictions on the platform’s operations, the creation of new resources in the cloud infrastructure may be limited.

We regularly publish information about the operation of our services on the status board.

Yandex Compute Cloud

If you saved disk snapshots, you will be able to recover their data.

1. Uploading previously created snapshots via a working VM

Create a disk and specify the previously created snapshot that you want to copy as its content.

Connect this additional disk to your desktop Compute Linux VM.

Connect via SSH to this VM in the cloud and copy the additional disk to the local VM using the command:

ssh <username>@<VM_IP_address> "sudo dd if=/dev/sdb status=progress | gzip -c" > sda.img.gz

The resulting compressed disk image will be saved to the folder on the local machine where the SSH session was started.

2. Uploading data from VM disks

If you need to upload data to a Linux-based Compute VM.

Connect via SSH to this VM in the cloud and copy the data from the disk to the image:

ssh <username>@<VM_IP_address> "sudo dd if=/dev/sdb status=progress | gzip -c" &gt; sda.img.gz

The resulting compressed disk image will be saved to the folder on the local machine where the SSH session was started.

Yandex Object Storage (S3 storage)

Object Storage data is automatically stored in multiple availability zones.
  1. Install the official AWS CLI client and configure it according to the instructions.

  2. Set up aws configure set default.s3.max_concurrent_requests 20 high download parallelism.

  3. If necessary, use more than one virtual machine with a static IP address to parallelize and accelerate downloads.

  4. Run a command to synchronize the source bucket with a location on a local disk, for example:

    aws s3 sync s3://source   --include "*" X:\destination
    
  5. If you have a lot of small objects in your bucket, use the S3 Inventory method to export their metadata in advance. This list will be useful for speeding up downloads, distributing the list across multiple VMs to speed up downloads, or simply saving a list of object metadata.

Yandex Cloud Functions and Yandex Serverless Containers

To collect logs, you can configure their export to third-party repositories yourself. Configure a special logger in the function/container code using third-party libraries for your language. Third-party S3 storage can be used.

At the end of each request, you need to perform a forced blocking “flush” of the accumulated logs.

Cloud CDN

Make sure that the resource has caching enabled.

To increase the percentage of cached content and reduce requests to the source, enable origin shielding.

Configure and connect a backup source with a copy of the content to a CDN source group.

If the resource’s operation logic allows for the delivery of outdated content to the end user when the source is unavailable, enable to options.stale option. For a new resource, use ResourceService.Create, and for an existing one, use ResourceService.Update.

Detailed instructions can be found in the documentation.

Yandex Managed Service for Kubernetes®

If your regional cluster has been switched to switched to SingleMaster mode and its API is available, continue working via the API. We are continuing to work on the performance of these clusters and returning to HA mode.

Data platform

Yandex Managed Service for_Apache_Kafka® / PostgreSQL / ClickHouse® / MySQL® /_Valkey™, Yandex_MPP_Analytics Engine for_PostgreSQL, Yandex_StoreDoc, Data_Transfer.

It is now possible to delete hosts from managed database clusters* in damaged zones:

  1. We recommend deleting hosts in these zones before making any other changes to the cluster. You can delete hosts in all databases except Kafka® and Yandex MPP Analytics Engine for PostgreSQL.
  2. We highly recommend that you do not perform major upgrades in any database.

* Yandex MPP Analytics Engine for PostgreSQL requires full recovery to a new zone using standard tools.

If the hosts are available, you can export backups yourself:

In PostgreSQL, MySQL and Valkey you can set up a logical replica outside the cloud using standard data migration tools.

YDB

YDB Serverless databases remain available. Data from them can be exported locally with the ydb tools dump command. Exporting to Object Storage is not yet available due to write restrictions.

If you previously exported data from YDB Dedicated to Yandex Object Storage, you can use it. The data from the bucket is loaded into the running YDB database using the ydb import s3 command. The local copy is loaded using the ydb tools restore command.

YDB is open-source, so you can deploy it on your own equipment or another platform following the instructions.

We quickly answer questions in the community Telegram chat.

Yandex DataLens

You can make backups of individual workbooks {target="_blank"} yourself. Workbooks contain descriptions of dashboards, charts, datasets, and connections, but they do not store the data itself. For more information, see this guide.

Connection errors are most often due to data source inaccessibility. If you’re migrating sources to other servers, be sure to open access to DataLens IP ranges.

Yandex AI Studio and SourceCraft models and components

We recommend using the Alice AI LLM Flash, DeepSeek V4.1 Flash, Qwen 3.6 35b models. If you are already using a different model, you should switch to one from the list above. To switch, change model_uri. You can find the right uri for the models above in the documentation.

If you are using dedicated instances, asynchronous mode, or batch runs, you need to switch to synchronous mode on the base instance models.

When publishing an AI agent to messengers and web widgets, we recommend that you monitor its operations in the Логирование section (the Responses tab) in the console.

Security

Access to HSM modules of the KMS service may be complicated. We recommend you do not create new HSM KMS keys.

How to get your secrets from Lockbox and Certificate Manager

  1. Export secrets from Lockbox.
  2. Export certificates from Certificate Manager. For certificates that support export, you can download both the certificate chain and the private key.

If you did not find the answer to your question in the recommendations, please send a request to the support service or write to your account manager.

We are doing everything possible to restore services as soon as possible. We are here and ready to help.