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Template for PostgreSQL HA with etcd
There are many ways to run high availability with PostgreSQL; here we present a template for you to create your own custom fit high availability solution using etcd and python for maximum accessibility.
To get started, do the following from different terminals:
> etcd --data-dir=data/etcd
> run.py postgresql0.yml
> run.py postgresql1.yml
From there, you will see a high-availability cluster start up. Test different settings in the YAML files to see how behavior changes. Kill some of the different components to see how the system behaves.
Requirements on a Mac
Run the following on a Mac to install requirements:
brew install postgresql etcd haproxy libyaml
pip install psycopg2 pyyaml
Notice
There are many different ways to do HA with PostgreSQL, see the docs for a complete list.
We call this project a "template" because it is far from a one-size fits all, or a plug-and-play replication system. It will have it's own caveats. Use wisely.