joystream/query-node/docs/install-hydra.md

Install Hydra

Prerequisites

• Both Hydra-CLI and the generated project files have dependencies that require Node v10.16 or higher
• npm and (optional, but recommended) npx
• Hydra stores the substrate data in an external PostgresSQL 12 instance. The scaffolding tool provides a convenient shortcut for running the database instance from a Docker image. In this case the standard docker environment (docker and docker-compose) should be available.
• (Optional) Docker engine. The scaffolding tool provides targets for building Docker images for external deployment.

Installation

Global installation:

npm install -g @joystream/hydra-cli

The path to hydra-cli binaries will be added to the system-wide $PATH.

Local installation:

npm install @joystream/hydra-cli

The binaries will be installed to the local .bin folder. You can execute hydra-cli commands by adding the.binfolder within your local node_modules to $PATH.

Isolated set-up:

Execute hydra-cli commands directly by typing

npx @joystream/hydra-cli <command>

This provides an isolated way to execute hydra-cli commands.

{% hint style="info" %} Run hydra-cli --version to check your installation {% endhint %}