Which orchestration tool is frequently used in conjunction with Docker?

Kubernetes is frequently used in conjunction with Docker because it is a powerful orchestration tool designed to automate the management, scaling, and deployment of containerized applications. As Docker provides a way to create and run containers, Kubernetes complements this by managing those containers in a production environment, orchestrating how they interact with each other and with external resources.

Kubernetes can automate various tasks such as load balancing, scaling applications up or down based on demand, and rolling updates without downtime. This level of orchestration is essential for running containerized applications efficiently in large-scale environments.

While Terraform is an infrastructure as code tool mainly for provisioning cloud resources, Vagrant is more focused on managing virtual machine environments, and OpenShift is a platform that builds on Kubernetes but is not a standalone orchestration tool like Kubernetes. Thus, Kubernetes stands out as the industry-standard orchestration tool that works seamlessly with Docker containers.