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Howto Encrypt MySQL Backups on S3

TwinDB Backup supports encrypted backup copies since version 2.11.0. As usual the tool supports natively backup and restore operations, if backup copies are encrypted the tool takes care of decryption. Installing TwinDB Packages repository I will work with CentOS 7 system to show the example, but there are also packages for Ubuntu trusty and Debian […]

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Building RPM on Travis-CI in Docker containers

Travis-CI is a crucial component in Continuous Integration/Continuous Deployment. We use it a lot to run unit tests and building/uploading Python modules. Recently I had to solve a problem of building RPMs on Travis-CI with Docker containers. In this post I will describe step-by-step how to do that. We distribute our backup tool as RPM packages […]

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Show differences found by pt-table-checksum

TwinDB Table Compare

pt-table-checksum perfectly solves problem of checking if master and its slaves are in-sync. It answers the question “Are the slaves consistent with the master?”. However if the answer is “No” pt-table-checksum doesn’t actually tell what exactly is different.

pt-table-sync may give a partial answer. It can print SQL statements to sync the replication cluster. Reading the SQL […]

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Working with CloudFlare DNS in python

Last week I wrote about aDNS discovery feature in Etcd. As a step in the whole process we need to create DNS records in twindb.com zone. CloudFlare provides rich API to work with it. We wrapped it into a Python module twindb_cloudflare and opensourced it: Source code: https://github.com/twindb/twindb_cloudflare Documentation: https://twindb-cloudflare.readthedocs.io PyPi package: https://pypi.python.org/pypi/twindb_cloudflare In the […]

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Setting up Etcd cluster with DNS discovery

Setting up an etcd cluster with DNS discovery may be challenging. There are several building blocks: Etcd – a distributed key value store Amazon EC2 – cloud computing provider Cloudflare – DNS provider Chef – for configuring individual nodes Each of them has their pitfalls, we will guide you through whole process. DNS discovery Any clustered system needs […]

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