dirs.yaml

Overview

This file serves as a configuration snippet in YAML format that defines directory paths used within the application environment. It provides key directory variables related to the "block-keeper" module, specifying locations for main files, data storage, and logs. These directories are defined relative to other environment variables (ROOT_DIR and MNT_DATA), allowing for flexible deployment and environment configuration.

Configuration Variables

The file declares three variables:

Variable Details

• BK_DIR
  This variable points to the main directory where the block-keeper module’s files reside. It appends the string /block-keeper to the root directory variable ROOT_DIR.

• BK_DATA_DIR
  This variable specifies the location for storing persistent data related to block-keeper. It combines the mount data directory MNT_DATA with /block-keeper.

• BK_LOGS_DIR
  This variable defines the directory path where logs from block-keeper operations are stored, under the path /logs-block-keeper appended to MNT_DATA.

Implementation Details

• The file uses the Jinja2 templating syntax ({{ ... }}) to interpolate environment variables, allowing these paths to be dynamically resolved at runtime or during configuration parsing.

• This approach supports flexibility in deployment environments by abstracting physical paths behind environment-dependent variables.

• The file format being YAML makes it compatible with various configuration management tools and scripts that consume YAML for environment setups.

Interaction with Other System Components

• These directory variables are likely imported or sourced by other scripts, configuration files, or modules related to the block-keeper functionality.

• BK_DIR points to the module’s root, which may contain executable scripts, configuration files, or other resources required by block-keeper.

• BK_DATA_DIR is used by components responsible for data storage and retrieval, ensuring that all persistent data is centralized and accessible.

• BK_LOGS_DIR is consumed by logging mechanisms or log rotation tools that monitor the health and activity of block-keeper.

The environment variables ROOT_DIR and MNT_DATA must be defined elsewhere in the system or environment settings to resolve these paths correctly.

Visual Diagram

flowchart TD
ROOT_DIR["ROOT_DIR"]
MNT_DATA["MNT_DATA"]
BK_DIR["BK_DIR\n(block-keeper base path)"]
BK_DATA_DIR["BK_DATA_DIR\n(block-keeper data)"]
BK_LOGS_DIR["BK_LOGS_DIR\n(block-keeper logs)"]
ROOT_DIR --> BK_DIR
MNT_DATA --> BK_DATA_DIR
MNT_DATA --> BK_LOGS_DIR

Usage Examples

Assuming the environment variables are set as follows:

export ROOT_DIR="/opt/app"
export MNT_DATA="/mnt/data"

After processing dirs.yaml, the resolved variables would be:

BK_DIR=/opt/app/block-keeper
BK_DATA_DIR=/mnt/data/block-keeper
BK_LOGS_DIR=/mnt/data/logs-block-keeper

These paths can then be used in scripts or applications that require file access to the block-keeper module’s directories.

For more details on environment variable usage and templating, refer to the Environment Variables Configuration and YAML Configuration Files.