essnapshot

installation

globally used python >= 3.6

pip install essnapshot

python2 and python >= 3.6 installed at the same time

pip3 install essnapshot

current state

The goal is to deliver a snapshot rotation tool for elasticsearch snapshots. The functionality should be rather simple as most of it is already implemented in ES.

So I just stick to creating a repository, create snapshots within it and delete old ones. I assume that most people will use cron to call this script, so no daemon functionality or similar will be implemented.

The tool is not built to monitor the successfull write to disk of your snapshots. You have to monitor the STATE of the snapshots yourself.

At the Moment only Python 3.6, 3.7 and 3.8 are supported. Support for older Python versions is not planned at the moment.

usage/configuration

At the moment the tool supports only one parameter (excecpt for help):

Usage: cli.py [options]

Options:
  -h, --help            show this help message and exit
  -c FILE, --config=FILE
                        Path to configuration file. See example and
                        documentation at https://github.com/gricertg/essnapshot

You must provide a yamlconfiguration file like this:

---
es_connections:
  - host: 'localhost'
    port: 9200
repository_name: 'essnapshot'
repository:
  type: 'fs'
  settings:
    location: '/mnt/snapshot'
    compress: 'true'
retention_time: '7d'

The parameters should be self explanatory (if you're familiar with ES).

A short help to get you started with the main parameters:

es_connections

A list(array) of hashes(dictionaries) to which ES can connect to. To understand how this works see the Elasticsearch API documentation. Each Host is a Dictionary in the List. The Options per Host are the ones for Urllib3HttpConnections. See Connection in the API documentation. Here you can configre authentication too.

Please ensure that this configuration file can only be read by the user/container designated for the backup if you put any credentials in this configuration file (and please don't put it into a public git repository).

repository_name

This is the name of the repository which will be created and the snapshots created in.

repository

This represents the configuration of the ES repository. It's a representation of the JSON sent to ES and is described in the ES documentation in Register a snapshot repository.

retention_time

The maximum backup age before snapshots will be deleted.

execution

The script is intended to run at regular intervals via cron. I recommend to created a dedicated user for the snapshots and that only this user can access the configuration file.

A crontab entry for this user could look like this:

4 1 * * * essnapshot > /dev/null

STDOUT is suppressed. If any error occurs the error message will be sent via mail to the snapshot user (depending on your configuration of the system).

development

• the feature set should be kept small
• the project should have a high test coverage (there is still room to improve it!)
• try to hold on to styleguides and improve code quality

You need poetry and docker (for tests) installed.

Necessary improvements and development steps should be documentated as github issues.