docker-stack 0.3.1

CLI for deploying and managing Docker stacks.

Docker Stack CLI Utility

A powerful command-line utility designed to enhance Docker Swarm stack deployments by providing advanced features for managing Docker configs and secrets. This tool aims to simplify complex deployment scenarios and offer capabilities beyond vanilla Docker Stack.

Features

• Docker Config and Secret Management with Extended Options: This utility significantly extends Docker's native config and secret management by introducing x- prefixed directives in your docker-compose.yml files. These directives allow for dynamic content generation, templating, and file inclusion, making your deployments more flexible and secure.

  x-content: Inline Content for Configs and Secrets

  Allows you to define the content of a Docker config or secret directly within your docker-compose.yml.

  secrets:
    my_inline_secret:
      x-content: "This is my secret content defined inline."
  
  configs:
    my_inline_config:
      x-content: |
        key=value
        another_key=another_value
  

  x-template: Environment Variable Templating

  Enables the use of environment variables within your config or secret content, which are substituted at deployment time.

  secrets:
    my_templated_secret:
      x-template: "I can create composite secret with template. ${API_KEY_NAME}:${MY_API_KEY}"
  

  x-template-file: External Template Files

  Reference an external file whose content will be treated as a template and processed with environment variables.

  configs:
    my_config_from_template_file:
      x-template-file: "./templates/my_config.tpl"
  

  (Content of ./templates/my_config.tpl might be: DB_HOST=${DATABASE_HOST})

  x-generate: Dynamic Secret Generation (Secrets Only)

  This powerful feature allows you to automatically generate random secrets based on specified criteria, eliminating the need to manually create and manage them. This is particularly useful for passwords, API keys, and other sensitive data.

  • Simple Generation (12-20 characters, default options):

    secrets:
      my_simple_generated_secret:
        x-generate: true
    

  • Specify Length:

    secrets:
      my_fixed_length_secret:
        x-generate: 30 # Generates a 30-character secret
    

  • Custom Generation Options: You can provide a dictionary to fine-tune the generation process:

    • length: (integer, default: 12-20 random) Exact length of the secret.
    • numbers: (boolean, default: true) Include numbers (0-9).
    • special: (boolean, default: true) Include special characters (!@#$%^&*...).
    • uppercase: (boolean, default: true) Include uppercase letters (A-Z).

    secrets:
      my_complex_generated_secret:
        x-generate:
          length: 25
          numbers: false
          special: true
          uppercase: true
      my_alphanumeric_secret:
        x-generate:
          length: 15
          numbers: true
          special: false
          uppercase: false
    

• Docker Stack Versioning and Config Backup for Rollback: The utility automatically versions your Docker configs and secrets, allowing for easy tracking of changes and seamless rollbacks to previous states. This provides a safety net for your deployments, ensuring you can always revert to a stable configuration.

Why use Docker Stack CLI Utility?

Vanilla Docker Stack deployments can sometimes lack the flexibility needed for dynamic environments or robust secret management. This utility bridges those gaps by:

• Automating Secret Management: No more manual secret generation or complex external scripts.
• Simplifying Configuration: Define configs and secrets directly in your compose files or use templates.
• Enhancing Security: Generate strong, random secrets on the fly.
• Enabling Rollbacks: Versioning ensures you can always revert to a known good state.

Get started today and streamline your Docker Swarm deployments!