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# postgres operator # Postgres Operator
[![Build Status](https://travis-ci.org/zalando-incubator/postgres-operator.svg?branch=master)](https://travis-ci.org/zalando-incubator/postgres-operator) [![Build Status](https://travis-ci.org/zalando-incubator/postgres-operator.svg?branch=master)](https://travis-ci.org/zalando-incubator/postgres-operator)
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The Postgres operator manages Postgres clusters in Kubernetes using the [operator pattern](https://coreos.com/blog/introducing-operators.html). The Postgres operator manages PostgreSQL clusters on Kubernetes using the [operator pattern](https://coreos.com/blog/introducing-operators.html).
During the initial run it registers the [Custom Resource Definition (CRD)](https://kubernetes.io/docs/concepts/api-extension/custom-resources/#customresourcedefinitions) for Postgres. During the initial run it registers the [Custom Resource Definition (CRD)](https://kubernetes.io/docs/concepts/api-extension/custom-resources/#customresourcedefinitions) for Postgres.
The Postgresql CRD is essentially the schema that describes the contents of the manifests for deploying individual Postgresql clusters using Statefulsets and Patroni. The Postgresql CRD is essentially the schema that describes the contents of the manifests for deploying individual Postgresql clusters using Statefulsets and [Patroni](https://github.com/zalando/patroni).
Once the operator is running, it performs the following actions: Once the operator is running, it performs the following actions: