YAD

Light weight deployment scripts

This repository is suggested to be located under /etc/yad/deploy/

Deploymentscript "php.sh"

Takes care of downloading a package with the application. Takes care of managing the releases and the symlinks.

Uses the following Variables:

• YAD_RELEASE_FOLDER : Path to the folder where the package should be installed. Inside of this folder some symlinks are maintained by the script: latest, current, previous and next

• YAD_PACKAGE : Url to the package

• YAD_PACKAGE_USERNAME, YAD_PACKAGE_PASSWORD : Optional the username required to download the package

• AWSCLIPROFILE : If the package points to S3, this is the profile that will be used

Concepts:

The deployment concept of YAD consists of the following steps and conventions:

1. Deployment Preparation: For every application there exists a deploymentscript under /usr/local/bin following the naming convention yad_

   This script itself is very light and the only thing it does is including the settings file for this application. (a script under "/etc/yad///", which normaly only contains some defined Variables (like DB_HOST ...), that the installation of this application expects.)

   This script then triggers the standard yad deployment scripts.

2. Deployment: The standard yad deploymentscripts are located under /etc/yad/deploy

   The deploymentscript is just responsible for downloading the application package from a specified url, taking care of cleaning up old releases if required, and then triggers the installation script. For more details read https://github.com/aoepeople/yad

3. Installation: The installation is completely in the responsibility of the application. A typical step in the installation is adjusting application settings like database settings. We recommend using "settings injection": The installation process should expect the settings in environment variables! Exactly the ones included in step 1 :-)

###Available options

Option	Type	Description	Default	Required
YAD_DEPLOY	String	Script to use for the installation	php.sh	YES
YAD_RELEASE_FOLDER	String	Release directory where your application should be installed		YES
YAD_INSTALL_SCRIPT	String	Entry point for your package installation	setup/install.sh	NO
YAD_PACKAGE	String	Used to download the deployment artefact (can be zip, tar.gz)		YES
YAD_PACKAGE_USERNAME	String	User to login in order to download the artefact		NO
YAD_PACKAGE_PASSWORD	String	Password to login in order to download the artefact		NO
YAD_PREINSTALL_SCRIPT	String	Executable script that is triggered before the installation starts		NO
YAD_POSTINSTALL_SCRIPT	String	Executable script that is triggered before the symlink switch is done		NO
YAD_POSTDEPLOYMENT_SCRIPT	String	Executable script that is triggered after deployment (symlinking)		NO
YAD_RELEASES_TO_KEEP	Integer	Keep only the number of releases (rest will be deleted)	5	NO
YAD_ADD_EXTRA_PACKAGE	String	If set the extra package (.extra.tar.gz) will downloaded and extracted on top of the original package		NO

Example

project: starfleet application: magento environment: staging

call:

/usr/local/bin/yad_starfleet_magento_staging
|--> source /etc/yad/starfleet/magento/staging.sh (File containing the settings for this environment.)
|--> call /etc/yad/deploy/yad.sh
     |--> basic validation that YAD_* variables are defined
     |--> ensure /etc/yad/deploy/__APP__.sh is available
     |--> call the specific deployment-script e.g. /etc/yad/deploy/php.sh

/usr/local/bin/yad_starfleet_magento_staging content:

#!/bin/bash

source "/etc/yad/starfleet/magento/staging.sh"
/etc/yad/deploy/yad.sh

/etc/yad/starfleet/magento/staging.sh content:

## starfleet-magento

export DB_HOST='localhost'
export DB_USER='mg_stage'
export DB_PASS='mg_pass'
export DB_NAME='magento_staging'

#######################
# YAD specific settings

export YAD_DEPLOY=php.sh
export YAD_RELEASE_FOLDER=/var/www/starfleet/magento/staging/releases
export YAD_INSTALL_SCRIPT=setup/install.sh

# package containing at least an install.sh install script
# supports tgz and zip packages
export YAD_PACKAGE=https://example.tdl/artifact/starfleet-magento.tar.gz
export YAD_PACKAGE_USERNAME=__USERNAME__
export YAD_PACKAGE_PASSWORD=__PASSWORD__

Deploymentscript "gradle.sh"

It expect a zip archive as artefact with a folder setup. In the setup folder should be a gradle build file. As default the gradlew wrapper will be called. Change YAD_INSTALL_SCRIPT=gradle if you have installed the wrapper on the target machine.