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Reconfiguring TLS of Postgres Database

This guide will give an overview on how KubeDB Ops-manager operator reconfigures TLS configuration i.e. add TLS, remove TLS, update issuer/cluster issuer or Certificates and rotate the certificates of a Postgres database.

Before You Begin

• You should be familiar with the following KubeDB concepts:
  • Postgres
  • PostgresOpsRequest

How Reconfiguring Postgres TLS Configuration Process Works

The following diagram shows how KubeDB Ops-manager operator reconfigures TLS of a Postgres database. Open the image in a new tab to see the enlarged version.

  

The Reconfiguring Postgres TLS process consists of the following steps:

1. At first, a user creates a Postgres Custom Resource Object (CRO).

2. KubeDB Provisioner operator watches the Postgres CRO.

3. When the operator finds a Postgres CR, it creates required number of PetSets and related necessary stuff like secrets, services, etc.

4. Then, in order to reconfigure the TLS configuration of the Postgres database the user creates a PostgresOpsRequest CR with desired information.

5. KubeDB Ops-manager operator watches the PostgresOpsRequest CR.

6. When it finds a PostgresOpsRequest CR, it pauses the Postgres object which is referred from the PostgresOpsRequest. So, the KubeDB Provisioner operator doesn’t perform any operations on the Postgres object during the reconfiguring TLS process.

7. Then the KubeDB Ops-manager operator will add, remove, update or rotate TLS configuration based on the Ops Request yaml.

8. Then the KubeDB Ops-manager operator will restart all the Pods of the database so that they restart with the new TLS configuration defined in the PostgresOpsRequest CR.

9. After the successful reconfiguring of the Postgres TLS, the KubeDB Ops-manager operator resumes the Postgres object so that the KubeDB Provisioner operator resumes its usual operations.

In the next docs, we are going to show a step by step guide on reconfiguring TLS configuration of a Postgres database using PostgresOpsRequest CRD.