Posts Tagged kubernetes

Welcome to the second article in a series using infrastructure as code to deploy applications with Kubernetes. The series walks you through building a Kubernetes cluster on cloud providers, deploying applications, and “Day 2” activities such as migrating Node groups. In the previous article, we showed how to create a Kubernetes cluster for AWS, Azure, and GCP. In this installment, we’ll learn how to deploy an application using Kubernetes objects.

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Containers solved the problem of moving software from one environment to another because they encapsulate all the software dependencies. However, an orchestration platform is needed to manage containers at scale. Kubernetes is a popular open-source solution that uses declarative configuration to specify the desired state of the application. Configuring and deploying an application on Kubernetes is often accomplished with YAML files to define the state and command line tools to manage and control the Kubernetes API. This article demonstrates how to use infrastructure as code to create basic Kubernetes objects and higher-level abstractions that build upon the basic objects.

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We recently announced the 2.0 release of Pulumi which includes parity for Node.js (JavaScript, TypeScript), Python, .NET (C#, F#, etc) and Go, and improvements to Kubernetes and dozens of other supported cloud resource providers and packages.

Kubernetes support in Pulumi spans orchestration of clusters and application workloads. Clusters can be managed by cloud providers or self-managed. Workloads use the same Kubernetes API to create and manage API resources in the supported Pulumi languages through packages directly generated from the OpenAPI specification.

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You’ve containerized your application, and it’s running great on your desktop using Docker Compose or Swarm. But now it’s time to test it locally with minikube and then put it into production with Kubernetes. Manifests are a bit like Compose files - it’s just YAML, right?

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Amazon EKS clusters can use IAM roles and policies for Pods to assign fine-grained access control of AWS services. The AWS IAM entities map into Kubernetes RBAC to configure the permissions of Pods that work with AWS services.

Together, AWS IAM and Kubernetes RBAC enable least-privileged access for your apps, scoped to the appropriate policies and user requirements.

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This is the fifth and last installment of the Architecture as Code series. In previous articles, we examined how to create reusable components for the primary architectural patterns for cloud infrastructure. Starting with virtual machines, we examined how to create and configure VMs. In the follow-up article, we demonstrated how to create reusable components from resources that comprise a microservices architecture. After microservices, we looked at serverless architecture, which despite its name, also requires additional resources to deploy a function or application. In this article, we’ll look at deployment patterns for Kubernetes with a focus on multi-tenancy issues.

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Scott Lowe is a 20+ year veteran of the IT industry and a Staff Kubernetes Architect at VMWare. He’s a prolific author (seven books) and blogger. His technology-focused blog covers a range of topics that include cloud computing (AWS, Azure, and Kubernetes), virtualization (KVM, VMware vSphere), open-source tools (Terraform, Ansible, Vagrant, and others), and networking (Open vSwitch, Linux networking).

For this guest post, Scott demonstrates how he uses Pulumi to deploy AWS test environments across multiple regions to help with testing various Kubernetes tools and projects, including the Cluster API project.

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We’re excited that Go is now a first-class language in Pulumi and that you can build your infrastructure with Go on AWS, Azure, GCP, and many other clouds. Users often ask, “Can I use Pulumi to manage Kubernetes infrastructure in Go today?” With the release of Pulumi 2.0., the answer is “Yes!”

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Abstraction is key to building resilient systems because it encapsulates behavior and decouples code, letting each component perform its function independently. The same principles apply to infrastructure, where we want to declare behavior or state and not implementation details. As an industry, we’ve moved away from monolithic applications to distributed systems such as serverless, microservices, Kubernetes, and virtual machine deployments. In this article, we’ll take a closer look at the characteristics of these architectures and how Pulumi can abstract the components that comprise these systems.

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Stop writing Kubernetes YAML by hand, and start using the power of familiar programming languages! Pulumi can generate Kubernetes manifests that easily integrate into existing CI/CD workflows.

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