At Dockercon Europe 2018 held in Barcelona, Microsoft in collaboration with the Docker community announced Cloud Native Application Bundle (CNAB), which is an open-source, cloud-agnostic specification for packaging and running distributed applications.
Cloud Native Application Bundle(CNAB) is the combined effort of Microsoft and the Docker community to provide a single all-in-one packaging format, which unifies management of multi-service, distributed applications across different toolchains. Docker is the first to implement CNAB for containerized applications. It plans to expand CNAB across the Docker platform to support new application development, deployment, and lifecycle management.
CNAB allows users to define resources that can be deployed to any combination of runtime environments and tooling including Docker Engine, Kubernetes, Helm, automation tools and cloud services.
Patrick Chanezon, technical staff at Docker Inc. writes, “Initially CNAB support will be released as part of our docker-app experimental tool for building, packaging and managing cloud-native applications. Docker lets you package CNAB bundles as Docker images, so you can distribute and share through Docker registry tools including Docker Hub and Docker Trusted Registry.”
Docker also plans to enable organizations to deploy and manage CNAB-based applications in Docker Enterprise soon.
Scott Johnston, Chief product officer at Docker, said, “this is not a Docker proprietary thing, this is not a Microsoft proprietary thing, it can take Compose files as inputs, it can take Helm charts as inputs, it can take Kubernetes YAML as inputs, it can take serverless artifacts as inputs.”
According to Microsoft, they partnered with Docker to solve issues with ISV (Independent Software Vendor) and enterprises including:
According to a user review on Hacker News thread, “The goal with CNAB is to be able to version your application with all of its components and then ship that as one logical unit making it reproducible. The package format is flexible enough to let you use the tooling that you’re already using”.
Another user said, “CNAB makes reproducibility possible by providing unified lifecycle management, packaging, and distribution. Of course, if bundle authors don’t take care to work around problems with imperative logic, that’s a risk.”
To know more about Cloud Native Application Bundle(CNAB) in detail, visit Microsoft blog.
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