Google Kubernetes Engine

Pre-requisite: Google Cloud Platform

This article intends to provide an introduction to the Google Kubernetes Engine(GKE). Google Kubernetes Engine is a fully-managed service for running and managing containerized applications on the Google Cloud Platform. GKE is based on Kubernetes, an open-source container orchestration system that allows you to deploy and manage containerized applications at scale. GKE provides a number of features to make it easy to deploy, run, and manage containerized applications on the Google Cloud Platform. Let us go through a few features and drawbacks.

Advantages of GKE

• Simplified Container Deployment and Management: GKE makes it easy to deploy and manage containerized applications by providing a fully-managed Kubernetes environment. You can use GKE to deploy and manage your containers without having to worry about the underlying infrastructure.
• Autoscaling Scaling: Google Kubernetes Engine automatically scales your applications up and down based on demand, helping you to optimize resource utilization and reduce costs.
• Monitoring and Logging: Google Kubernetes Engine includes tools for monitoring the health and performance of containerized applications, as well as for logging the output of those applications. A set of notifications and warnings are released once any kind of threat is found.
• Load Balancing: GKE provides built-in load balancing for containerized applications, allowing them to scale to handle large amounts of traffic. Including distinctive strategies and conditions for planning against the unpredictable load.  
• High Availability: GKE provides built-in high availability for your applications, with automatic failover and self-healing capabilities.
• Security: Google Kubernetes Engine includes features such as role-based access control and network security policies to help ensure the security of containerized applications.
• Rollouts and Rollbacks: GKE provides features for rolling out and rolling back changes to containerized applications, making it easy to deploy updates and roll back if necessary. This ensures continuous delivery and provides uninterrupted support.
• Integration with Google Cloud Services – Google Kubernetes Engine integrates seamlessly with other Google Cloud services, such as Google Cloud Storage, BigQuery, and Stackdriver, allowing you to build and run hybrid cloud applications.

Disadvantages of GKE

• Cost – GKE is a managed service and, as such, it can be more expensive than running Kubernetes on your own infrastructure. However, the cost may be justified by the convenience and additional features provided by GKE.
• Limited Customization – Google Kubernetes Engine (GKE) is generally considered to be a Platform as a Service (PaaS). While GKE provides many features and options for configuring and managing containerized applications, it may not offer the same level of customization as running Kubernetes on your own infrastructure. This can be a disadvantage if you need to customize your Kubernetes environment in specific ways.
• Complexity – Kubernetes can be a complex system to learn and operate, and GKE adds an additional layer of abstraction on top of it. This can make it more difficult to understand and troubleshoot problems, particularly for users who are new to Kubernetes.
• Lock-in – It is one of the most ignored drawbacks. By using GKE, you may be relying on a proprietary platform and could potentially be locked into using the Google Cloud Platform for the long term. This could make it more difficult to migrate to a different cloud provider or to an on-premises solution.

Architecture of GKE

GKE is a fully managed service for deploying, managing and scaling containerized applications using Kubernetes. It simplifies the process of running and managing Kubernetes clusters by abstracting away many of the underlying infrastructure details.

At a high level, GKE consists of the following components,

• Kubernetes Master Nodes – These are the control plane nodes that manage the state of the cluster and handle API requests. They are responsible for tasks such as scheduling pods, maintaining the desired state of the cluster, and responding to events.
• Kubernetes Worker Nodes – These are the nodes that run the containerized applications. They are responsible for tasks such as starting and stopping containers, reporting the status of pods and handling network traffic.
• Cluster API – This is the API that GKE uses to create and manage clusters. It allows users to create and delete clusters, scale the number of nodes in a cluster, and perform other operations.
• Kubernetes Add-Ons – These are additional components that can be added to a cluster to provide additional functionality. Examples include monitoring, logging, and ingress controllers.
• Google Cloud Platform (GCP) Services – GKE is built on top of GCP, and it leverages many GCP services to provide additional functionality, such as load balancing, storage, and networking.

GKE Use Cases

Google Kubernetes Engine (GKE) is a good choice for deploying and managing containerized applications at scale. Along with this, it is particularly well-suited for the following types of use cases.

• Microservices: GKE is well-suited for deploying microservices-based applications, which are made up of many small, independently deployable services. Kubernetes, the open-source system on which GKE is based, is designed to manage and orchestrate large numbers of distributed components, making it a natural choice for microservices.
• Cloud-Native Applications: Google Kubernetes Engine can be used to build and run hybrid cloud applications that span both Google Cloud and on-premises resources. GKE is designed to be used with cloud-native applications, which are built specifically to take advantage of the features and capabilities of cloud environments. GKE provides many features to make it easy to deploy and manage cloud-native applications, including automatic scaling, load balancing, and monitoring.
• Continuous Integration and Delivery (CI/CD): GKE can be used as part of a CI/CD pipeline to automate the deployment of applications. It provides features such as rolling updates and rollbacks, which make it easier to deploy and manage applications in a production environment.
• High-Traffic Applications: GKE can handle large amounts of traffic, making it a good choice for high-traffic applications. It provides built-in load balancing and can automatically scale the number of replicas of a containerized application based on demand.
• Deploying and Managing Containerized Applications: GKE is typically used to deploy and manage containerized applications at scale. With GKE, you can deploy and manage your containers without having to worry about the underlying infrastructure.

In summary, Google Kubernetes Engine is a fully-managed service for running and managing containerized applications on Google Cloud. It offers features such as autoscaling, high availability, and integration with other Google Cloud services, but can be more expensive than some other container orchestration solutions and offers limited customization options. GKE is commonly used to deploy and manage containerized applications, build and run hybrid cloud applications, and run stateful applications.