genesis-devtools 0.2.7

Tools to manager life cycle of Genesis projects.

Genesis Dev Tools

The tools to manager life cycle of genesis projects

Requirements

Before you can install and use genesis tools you need to install several requirements:

• packer
• libvirt
• qemu

Ubuntu

Install packages

sudo apt update
sudo apt install qemu-kvm qemu-utils libvirt-daemon-system libvirt-dev mkisofs

Add user to group

sudo adduser $USER libvirt
sudo adduser $USER kvm

Install packer like described in this article

Install

To install the genesis-devtools package, follow these steps:

1. Clone the repository:

   git clone https://github.com/infraguys/genesis_devtools.git
   

2. Navigate to the project directory:

   cd genesis_devtools
   

3. Install the required dependencies:

   pip install -r requirements.txt
   

4. Install the package using pip:

   pip install .
   

Quickstart

Build

Firstly you need to build the genesis project. Navigate to your project directory and run the genesis build command, specifying the path to your project root directory as an argument. This will build the project according to the configuration defined in the genesis.yaml file.

Here are some examples of how to use the build command:

genesis build /path/to/my/project

There are some useful options for the genesis build command.

• Build a Genesis project with a custom developer key path:

genesis build -i /path/to/my/developer/key /path/to/my/project

• Build a Genesis project with the --force option to rebuild if the output already exists:

genesis build -f /path/to/my/project

Look at the genesis build --help command for more options.

Bootstrap

To bootstrap a Genesis installation locally, use the genesis bootstrap command. This command creates and boots a virtual machine with the specified Genesis image.

One of the key options for the bootstrap command is --launch-mode, which allows you to specify the launch mode for the application. There are three available modes:

• element: This is the default mode, which launches the installation as a single element.
• core: This mode launches the installation as a core.
• custom: This mode allows you to launch the installation with a custom configuration.

Here are some examples of how to use the --launch-mode option:

genesis bootstrap -i output/genesis-element.raw

Launch the installation in core mode:

genesis bootstrap -i output/genesis-core.raw -m core

Usage

The package provides a command line interface for building genesis projects, managing genesis installations and cover many other useful aspects. To use the command line interface, run the genesis command from the command line. For full documentation about CLI commands, run genesis --help.

For every genesis project the directory genesis should exist in the project root. The project configuration file should be named genesis.yaml in this directory. For example my project structure looks like this:

.
├── my_project
│   └── main.py
├── project_settings.json
├── requirements.txt
├── setup.cfg
├── setup.py
└── README.md

The project should be extended as follows:

.
├── my_project
│   └── main.py
├── genesis
│   └── genesis.yaml
├── README.md
├── project_settings.json
├── requirements.txt
├── setup.cfg
├── setup.py
└── README.md

Genesis configuration file

The genesis.yaml file contains the configuration for the genesis project. It should be placed in the genesis directory. It consists of several sections such as build, deploy, etc.

Example of the genesis.yaml file:

# Build section. It describes the build process of the project.
build:
  # Dependencies of the project
  # This section is used to specify build dependencies
  # for the project
  deps:
      # Target path in the image
    - dst: /opt/genesis_core
      # Local path of the build machine
      path:
        src: ../../genesis_core
  
  # This section describes elements of the project.
  # Images, artifacts and manifests for every element. 
  elements:
      # List of images in the element
    - images:
      - name: genesis-core
        format: raw
        
        # OS profile for the image
        profile: ubuntu_24

        # Provisioning script
        script: images/install.sh

        # Override image build parameters, for instance Packer parameters
        override:
          disk_size: "10G"

      manifest: manifests/genesis-core.yaml
      
      # List of artifacts in the element
      artifacts:
        - configs/my-cofig.yaml
        - templates/my-template.yaml

Build project

The genesis build command builds the project. The build process is described in the build section of the genesis.yaml file. The mandatory argument is path to the project root directory.

Build a Genesis project.

genesis build my_project

This will build the Genesis project in the my_project directory using the default configuration file will be located in my_project/genesis/genesis.yaml.

After build the project output artifacts will be stored in the output directory. For detailed information about the genesis build command run genesis build --help.

Manager Genesis installation locally

To bootstrap genesis installation locally, run the genesis bootstrap command. The mandatory argument is path to the genesis image. For instance,

genesis bootstrap output/genesis-core.raw

This command will create and boot a virtual machine with the specified genesis image output/genesis-core.raw. The default name of the installation is genesis-core. For detailed information about the genesis bootstrap command run genesis bootstrap --help.

To connect to the genesis installation, run the genesis ssh command. For instance,

genesis ssh

To list genesis installations, run the genesis ps command. For instance,

genesis ps

To delete genesis installation, run the genesis delete command. For instance,

genesis delete genesis-core

Stand specification

For more complicated cases when you need to start an installation with several nodes (that are treated as baremetal nodes) you may use stand specification. The stand specification is a YAML file describes the genesis installation. it specifies how many bootstrap nodes, how many baremetal nodes, their characteristics and other parameters. For instance, it may look like this:

Small stand

Use option --stand-spec or -s for the bootstrap command to specify file with stand description. For instance,

genesis bootstrap -i output/genesis-core.raw -f -m core -s data/stands/stand-small.yaml

Versions

Semver is used for project versioning. There are three types of versions:

• stable version - format X.Y.Z
• release candidate version - format X.Y.Z-rc+YYYYMMDDHHMMSS.commit_hash[:8]
• development version - format X.Y.Z-dev+YYYYMMDDHHMMSS.commit_hash[:8]

Stable version looks like 1.0.0, only three digits. Release candidate version looks like 0.0.1-rc+20250224092842.e11604e9. Development version looks like 0.0.1-dev+20250223180245.fb195339.

To get project version, run the genesis get-version with path to the project root directory as an argument to the command. For instance,

genesis get-version /path/to/my_project

Backups

The backup command is used to backup the current installation. This guide provides a brief overview of the command and its usage, along with several examples to get you started.

The basic syntax of the backup command is as follows:

genesis backup -d /path/to/backup/directory

Run the above command to backup the current installation to the specified directory. The command will create a subdirectory for each domain and copy its disks to the specified directory. The backup will repeat every 24 hours by default.

To configure period of backup, run the following command:

genesis backup -d /path/to/backup/directory -p 1h

The above command will backup the current installation to the specified directory every hour.

There is an option to do a backup once and exit:

genesis backup -d /path/to/backup/directory -oneshot

The above command will backup the current installation to the specified directory once and exit.

Basic Backup

Run backup periodically of all libvirt domains and store it in the current directory:

genesis backup

Backup Specific Domain

Run backup periodically of a specific libvirt domain and store it in the current directory:

genesis backup -n domain-name

Custom Periodic Backup

Run backup periodically of all libvirt domains and store it in the current directory:

genesis backup -p 1h

Available periods are: 1m, 5m, 15m, 30m, 1h, 3h, 6h, 12h, 1d, 3d, 7d

OneShot Backup

Run backup of all libvirt domains and store it in the current directory:

genesis backup -oneshot

This command will backup the current installation to the specified directory once and exit.

Compressed Backup

Run backup of all libvirt domains and store a compressed archive of the backup in the current directory:

genesis backup --compress

Encrypted Backup

Run backup of all libvirt domains and store an encrypted archive of the backup in the current directory:

NOTE: It works only with --compress flag

You need to set the environment variables GEN_DEV_BACKUP_KEY and GEN_DEV_BACKUP_IV to encrypt the backup. The key and IV must be greater or equal to 6 bytes and less or equal to 16 bytes.

export GEN_DEV_BACKUP_KEY=secret_key
export GEN_DEV_BACKUP_IV=secret_iv

genesis backup --compress --encrypt

For decryption, use the genesis backup-decrypt command.

genesis backup-decrypt backup.tar.gz.encrypted

Rotation

For the periodic backup, you can set the number of backups to keep(rotation number). The default value is 5. Use the --rotate option to set the number of backups to keep:

genesis backup --rotate 10

Prevent disk overflow

Backups can take a lot of disk space and it can be a reason to crash the whole system if a disk will be full. To prevent such a situation you can set a threshold for disk space that should be free. If during a backup process this threshold will be reached, the backup process will stop. Use the --min-free-space option to set the threshold in GB.

genesis backup --min-free-space 50