The workloads within Postgres benefit from using Kubernetes automation. However, stateful workloads need to meet a strict range of criteria to ensure they have the performance, security, and availability necessary to function within critical applications.
If you want to maximize the benefits of Kubernetes Postgres, you must take into account the following considerations:
Container-Native Storage – Make sure you possess a data layer offering dynamic storage provisioning. You need this to comply with stateful services provided by platforms like Postgres. Container volumes are not designed to provide storage to containers in a direct manner. If you decide to use blocks, you could experience slow provisioning of databases. By using container-native storage, you keep your data available in the event you need to opt for pod rescheduling.
Maintain Availability – Postgres uses something called WAL to always maintain data integrity. These databases log the changes in your data and send them to disk prior to writing them into the database. If you experience a database disaster or corruption, Postgres can reapply your changes by retrieving the WAL. To avoid a slowdown of the WAL process, you should ensure that you have a strong read-write performance.
Ensure High Data Security Standards – One of the major benefits of Postgres is that you already have encryption that has been built into the system. It protects your data through the use of a cipher to encode it. In order to maintain the data in its original state, you will need a password or decryption command. These data security provisions must be available at the application level.
Many database operators need help with the API to initiate a Postgres database within Kubernetes. Postgres.exe is the core process when you run PostgreSQL on your computer or database system.
Configuration is the key to running these platforms in tandem with each other. In particular, you need to be wary of Pods specifications, paying special attention to primary and standby Pods.
You also need to leverage the Kubernetes architecture to maximize the benefits of running these programs together. Kubernetes relies on distributed agents, known as controllers, to communicate through the central control plane. These controllers are there to track instances from Postgres, and be responsible for the management of the whole Postgres application.
Finally, you should always keep a backup of your data. Understand that disasters can happen at any time, and without a disaster recovery backup, you will be unable to retain the latest versions of your data.
It is always considered best practice to maintain backup copies of your data. If the platform needs to reschedule one of your pods, you can use a local copy to get your database back. Data loss is a significant risk when running these programs together, but by relying on local copies, you always have an option to get everything back.
Moreover, you have the extra benefit of maintaining local copies of data. If the corruption of one of your databases occurs, you can shorten the time needed to restart a Pod and bring it back to life.
Proper planning will ensure that you can face any challenge that shows up along the way, no matter the severity.