LinuxCommandLibrary

func

Manage and interact with functions

TLDR

Create a new functions project

$ func init [project]
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Create a new function
$ func new
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Run functions locally
$ func start
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Publish your code to a function app in Azure
$ func azure functionapp publish [function]
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Download all settings from an existing function app
$ func azure functionapp fetch-app-settings [function]
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Get the connection string for a specific storage account
$ func azure storage fetch-connection-string [storage_account]
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SYNOPSIS

func [options] command [arguments]

PARAMETERS

-h, --help
    Display help message and exit.

-v, --verbose
    Enable verbose output.

-q, --quiet
    Suppress output messages.

-t, --timeout
    Set a timeout for remote command execution.

-l, --list
    List available commands.

--hostname
    Specify a target host.

DESCRIPTION

The `func` command, often associated with the Foreman framework, is a versatile tool for executing commands and managing remote systems. It facilitates remote execution of tasks on managed hosts through a central server. It allows administrators to run scripts, manage services, collect system information, and perform other actions on a large number of systems concurrently. `func` typically relies on an agent running on the target hosts, which listens for commands from the central server. This provides a scalable and efficient method for remote management and orchestration across an entire infrastructure.

Beyond remote execution, `func` can also manage system configuration. This could involve deploying configuration files, modifying system settings, or ensuring that managed hosts adhere to certain policies. It acts as a central control point for managing a large fleet of systems, ensuring consistency and simplifying administrative tasks.

CAVEATS

Functionality and available options depend heavily on the specific implementation and associated backend (e.g., Foreman). Ensure the agent is installed and configured properly on target hosts.

AUTHENTICATION

Typically, `func` relies on a secure authentication mechanism, such as SSH keys or certificates, to authenticate with target hosts. The configuration and setup of this authentication are crucial for security.

USE CASES

Common use cases include:
1. Batch updates: Simultaneously updating packages on multiple servers.
2. Configuration management: Distributing configuration files to systems.
3. System monitoring: Collecting system statistics (CPU, memory, disk) from a large number of machines.

HISTORY

The `func` command likely evolved within the context of system administration and configuration management tools like Foreman. Its purpose is to simplify remote execution of tasks. Specific details are tied to the Foreman project.

SEE ALSO

ssh(1), puppet(8), ansible(1)

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