Snapshot Restore

Quick steps for testing

File system

1. Add the file system path you want to use to elasticsearch.yml or as part of starting up ES. Note that this path should point to a directory that exists.

path:
  repo: /tmp/es-backups

or

yarn es snapshot --license=trial -E path.repo=/tmp/es-backups

2. Use Console or UI to add a repository. Use the file system path above as the location setting:

PUT /_snapshot/my_backup
{
  "type": "fs",
  "settings": {
    "location": "/tmp/es-backups",
    "chunk_size": "10mb"
  }
}

3. Adjust settings as necessary, all available settings can be found in docs: https://www.elastic.co/guide/en/elasticsearch/reference/master/modules-snapshots.html#_shared_file_system_repository

Readonly

Readonly repositories only take url setting. Documentation: https://www.elastic.co/guide/en/elasticsearch/reference/master/modules-snapshots.html#_read_only_url_repository

It's easy to set up a file: url:

PUT _snapshot/my_readonly_repository
{
  "type": "url",
  "settings": {
    "url": "file:///tmp/es-backups"
  }
}

Source only

Source only repositories are special in that they are basically a wrapper around another repository type. Documentation: https://www.elastic.co/guide/en/elasticsearch/reference/master/modules-snapshots.html#_source_only_repository

This means that the settings that are available depends on the delegate_type parameter. For example, this source only repository delegates to fs (file system) type, so all file system rules and available settings apply:

PUT _snapshot/my_src_only_repository
{
  "type" : "source",
  "settings" : {
    "delegate_type" : "fs",
    "location" : "/tmp/es-backups"
  }
}

Plugin-based repositories:

There is one official repository plugin available: HDFS. You can find the repository settings in the docs: https://www.elastic.co/guide/en/elasticsearch/plugins/master/repository-hdfs-config.html.

To run ES with plugins:

1. Run yarn es snapshot from the Kibana directory like normal, then exit out of process.
2. cd .es/8.0.0
3. bin/elasticsearch-plugin install https://snapshots.elastic.co/downloads/elasticsearch-plugins/repository-hdfs/repository-hdfs-8.0.0-SNAPSHOT.zip
4. Run bin/elasticsearch from the .es/8.0.0 directory. Otherwise, starting ES with yarn es snapshot would overwrite the plugins you just installed.

SLM status

Snapshot lifecycle management (SLM) status is "RUNNING" by default, but it can be stoped manually (for mantenaince purpouses, for instance). When this happens, no schedule snapshots will be taken. Docs: https://www.elastic.co/guide/en/elasticsearch/reference/master/snapshot-lifecycle-management-api.html

• To check the SLM status you can run GET _slm/status
• To start SLM POST /_slm/start
• To stop SLM POST /_slm/stop