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Devfile Documentation

website·Indexed 34 days ago

https://devfile.io/

Documentation for the Devfile specification, a YAML-based standard for describing cloud-native development environments. It covers creating minimal devfiles, managing components, defining variables, and utilizing the Devfile Registry to share stacks across tools like odo and Eclipse Che. Includes guides for schema versions 2.2.0 and 2.3.0, migration paths to v2.x, and details on innerloop and outerloop deployment scopes.

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What's inside Devfile

  1. Overview of devfiles and their purpose

    A devfile is a YAML file used to automate development processes. When included in a local environment, it provides guidelines that tools (such as odo) use to configure and apply settings to the environment based on specific development needs.

  2. Introduction to Devfiles

    A devfile is a YAML-based configuration file used to automate development processes. It defines the guidelines for a local environment, which are then applied by tools such as odo to ensure a consistent development setup tailored to specific project needs.

  3. Overview of the Customized Devfile Registry

    A customized devfile registry allows an organization to provide a centralized list of devfiles that describe custom application development workflows. It serves as a single point of management for applications built from stacks, enabling administrators to control the lifecycle of stacks and push updated devfiles to the registry during updates. Additionally, the registry build tools can be customized to enforce organizational standards through extra validations on the devfiles.

  4. Overview of the Devfile Ecosystem

    The Devfile ecosystem allows organizations to standardize development environments through a role-based approach involving three primary activities: creating, sharing, and consuming devfiles. This enables consistency across different tools and teams, whether using public community registries or private internal registries.

  5. Overview of the Devfile open standard

    Devfile is an open standard used to define containerized development environments. It allows developers to specify the tools, runtimes, and configurations needed for an application lifecycle in a machine-readable format, ensuring that environments are reproducible, consistent across teams, and easily updated for security or runtime fixes.

  6. Use devfiles to standardize development workspaces

    Devfiles allow developers to define workspaces composed of multiple containers, ensuring that all team members have a consistent user experience and identical build, run, and deploy behaviors. By sharing a single devfile, teams can reduce the gap between development and deployment and produce consistent runtime behaviors. Devfiles typically include guidance for runtime images, example code, build/CI commands, and deployment options.

  7. Standardize development workflows with Devfile

    Devfile allows language and framework experts to define and share recommended application development workflows. By creating standardized application stacks, developers can ensure a 'build once, run anywhere' experience, eliminating the need to maintain custom support for individual development tools.

  8. Understand the purpose and usage of a devfile

    A devfile is a YAML-based configuration file used to automate development processes. It defines the guidelines for a local environment, which are then applied by tools such as odo to ensure a consistent development setup based on specific project needs.

  9. Understand Devfile registry architecture

    A devfile registry is a service that stores and provides devfile stacks (templates for runtimes/frameworks like Node.js or Quarkus) to Kubernetes developer tools such as odo, Eclipse Che, and the OpenShift Developer Console. It is based on the Open Container Initiative (OCI) Specification, storing stacks as OCI artifacts.

  10. Understand Devfile registry architecture and components

    A devfile registry is an OCI-compliant service that stores and provides devfile stacks (templates for runtimes like Node.js or Quarkus) to Kubernetes developer tools such as odo, Eclipse Che, and the OpenShift Developer Console. It consists of two primary components:

    1. Devfile Index Server: A container that uses an index.json file to manage metadata about stacks and samples, bootstraps the OCI registry with these stacks, and provides an API for tools to retrieve them.
    2. OCI Registry Server: An OCI-compatible artifact registry where devfile stacks are stored as multi-layer artifacts.

  11. Devfile 2.1.0 Schema Overview

    The Devfile schema defines the structure of a cloud-native development workspace. Key top-level attributes include:

    • schemaVersion: (Required) The version of the Devfile schema. Must match the pattern ^([2-9])\.([0-9]+)\.([0-9]+)(\-[0-9a-z-]+(\.[0-9a-z-]+)*)?(\+[0-9A-Za-z-]+(\.[0-9A-Za-z-]+)*)?$.
    • metadata: Optional metadata for the workspace.
    • components: A list of workspace components such as editors, plugins, or user-provided containers.
    • commands: Predefined, ready-to-use commands related to the workspace.
    • events: Bindings that map specific commands to events.
    • projects: Projects worked on in the workspace, including names and source locations (e.g., git).
    • starterProjects: Projects used as starting points for bootstrapping new projects.
    • parent: Reference to a parent devworkspace template (via URI).
    • attributes: Implementation-dependent free-form YAML attributes.
    • variables: A map of key-value pairs used for string replacement throughout the Devfile.

  12. Standardize development workflows with devfiles

    Enterprise architects and runtime providers can define recommended workflows for specific languages and frameworks using devfiles. This approach allows for 'build once, run anywhere' portability, meaning application stacks developed once will work across different development tools without requiring custom support for each tool.