Day 02: The Kubernetes Application Lifecycle

by Edith Puclla

If you are in the world of application development, you know that every application has a lifecycle. An application lifecycle refers to the stages that our application goes through from initial planning, building, deployment, monitoring, and maintenance in different environments where our application can be executed.

On the other hand, the Kubernetes Application Lifecycle refers exclusively to applications deployed and managed in Kubernetes clusters. This differs from the normal application lifecycle because Kubernetes introduces new principles, practices, and tools for managing applications on containers.

In this blog post, we will talk about these phases Day 0, Day 1 and Day 2 in the lifecycle of an application in Kubernetes and we will focus specifically on the phase of Day 2.


Image 1: Day 0, Day 1 and Day 2 in the Kubernetes Application Lifecycle

Day 0 refers to the preparation stage before deploying applications in Kubernetes. It’s the stage of identifying goals, planning the infrastructure. Ensuring that the development team has knowledge about Kubernetes and best practices. It’s a stage for investment in training. And the evaluation of the application components to determine which are suitable for use within containers and Kubernetes.

Day 1 is the stage that involves deploying the application in Kubernetes clusters and the creation of Kubernetes resources: deployments, pods, services. Additionally, it includes configuration management and the implementation of basic monitoring following the decisions made on Day 0.

Finally Day 2, our application is already running in Kubernetes clusters by reaching this stage. Day 2 refers to the management, monitoring, and optimization of our Kubernetes clusters over the long term.

Day 2 involves:

  • Gathering information from our Kubernetes clusters through monitoring and logging.
  • Scaling our application, either horizontally or vertically.
  • Application of security best practices and compliance with policies.
  • Establishing backups and recovery processes to protect our data and application from future disasters.

Day 2, activities focus on sustainability, efficiency, and long-term continuous improvement to ensure the stability of our application and meet customer expectations.

Let’s see how Percona takes charge of Day 2

For Percona, a company specializing in the management of open source databases like MySQL, PostgreSQL, MongoDB, Day 2 refers to the ongoing efforts to ensure that database systems are running efficiently securely, and in alignment with business objectives.

Here are some examples of how Percona handles this phase:

To achieve Performance Monitoring, if you use our Percona Kubernetes Operators, you can integrate it with Percona Monitoring and Management (PMM) to check the performance of your databases in real time. Monitor query execution times, resource utilization, and server health. PMM helps to identify bottlenecks and inefficiencies, allowing for timely optimization and tuning.


Image 2: this is what the PMM Dashboard interface looks like when monitoring your database resources.

If we discuss data protection and disaster recovery, using Percona XtraBackup, an open-source backup utility for MySQL-based servers. In that case, you can ensure that your database remains fully accessible during scheduled maintenance periods.

As for scaling strategy and high availability, adopting solutions such as Percona XtraDB Cluster or Percona Server for MySQL enables us to secure the database and efficiently manage increased workloads, all while keeping downtime to a minimum.

These were just some examples of what Percona does for Day 2 to maintain tasks crucial for the business and that relies on databases to keep critical applications and services running.

​​Are you interested in learning more about Kubernetes or need assistance with your cloud-native strategy? With Percona Kubernetes Operators, you can manage database workloads on any supported Kubernetes cluster running in private, public, hybrid, or multi-cloud environments. They are 100% open source, free from vendor lock-in, usage restrictions, and expensive contracts, and include enterprise-ready features by default. Learn more about Percona Kubernetes Operators ∎

Edith Puclla

Edith Puclla is a Technology Evangelist of Percona Corporation, studied at 42 Silicon Valley School in California in 2020, and was part of the Outreachy Internship in 2021. She has a background in DevOps and is a Docker and Kubernetes enthusiast.

See all posts by Edith Puclla »


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