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These Debian packages can be downloaded on [Petals' website|http://petals.ow2.org].

h1. Installing Petals ESB

Nowadays, no public repository exists containing the Debian packages of Petals ESB. So to install yours, you must download them, next install them with your favorite Debian tools ({{synaptic}}, {{apt-get}}, {{dpkg}}).

Several Debian packages are available:
|| Package || Description || Depends on || Required for a production use ||
| {{petals-esb}} | The base package of Petals ESB to run a minimalist container | {{java2-runtime}}, {{curl}} | required |
| {{petals-esb-autoloader}} | The extension "Petals ESB Autoloader" | {{petals-esb}} | not recommended |
| {{petals-esb-artfifact-repository}} | The extension "Petals ESB artifact repository" | {{petals-esb}} | optional |
| {{petals-esb-wsapi}} | The extension "Petals ESB WS API" | {{petals-esb-artfifact-repository}} | optional |

+Note 1:+ The Petals ESB Autoloader is not recommended in production mode because of security reasons.

+Note 2:+ If your security policy requires to push your JBI artifacts on the host instead of downloading them, you can:
* use the extension Petals ESB artifact repository and push your JBI artifacts in its repository,
* or, push your JBI artifacts in a dedicated directory and use a remote Petals CLI with local file-based URLs.

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h1. Uninstalling Petals ESB

* {{/var/log/petals-esb}}
* {{/var/run/petals-esb}}

The dedicated Petals system user and group are also removed when purging packages. The Petals container configurations ({{/etc/petals-esb/container-available}}) are never removed except the sample one, to be reused eventually.

h1. Upgrading Petals ESB

To update the installed version of Petals ESB:

h2. Content of the package "{{petals-esb}}"

This package arrives with following directories and files:
* {{/usr/bin/petals-esb}}: The script used to start a Petals container,
* {{/usr/bin/petals-esb.sh}}: A link to {{/usr/bin/petals-esb}}, for compatibility with previous versions,
* {{/usr/share/petals-esb}}: Directory containing all Java libraries required by Petals ESB,
* {{/usr/share/petals-esb/extensions}}: Directory containing all extensions of Petals ESB,
* {{/etc/init.d/petals-esb}}: Automatic startup/stop script
* {{/etc/petals-esb/container-available/<container-name>}}: A directory containing the configuration of a Petals container:
** {{server.properties}}: the base configuration of the Petals container,
** usually, the following configuration files are placed in the same directory than the file {{server.properties}}:
*** {{topology.xml}}: the Petals topology of which the container is a member,
*** {{loggers.properties}}: configuration file of the logging system based on JDK Logging,
*** {{log4j.properties}}: configuration file of the logging system Log4J,
* {{/etc/petals-esb/container-enable}}: A directory containing links to sub-directoryies of {{/etc/petals-esb/container-available}}. If a container is linked into this directory, it will be automatically started on machine startup,
* {{/var/lib/petals-esb/<container-name>}}: Default location of the root directory of the Petals container data area. It will contain:
** the sub-directory {{repository}} is the *default* storage area of the internal repository containing installed/deployed artefacts,
** the sub-directory {{work}} used as internal working area of the *default* container,
* {{/var/log/petals-esb/<container-name>}}: Default location in which logging files of the Petals container will be written,
* {{/usr/share/petals-esb/licenses}}: Directory containing license files.

If needed, this package creates also the system user and group '*petals*' that runs Petals ESB container process.

h2. Content of the package "{{petals-esb-autoloader}}"

In addition to the extension JAR file put in the directory {{/usr/share/petals-esb/extensions}}, this package arrives with 2 new sub-directories of the root directory of the Petals container data area:
* the sub-directory {{install}}: the directory scanned by the auto-loader of the container to install/deploy artfifact,
* the sub-directory {{installed}}: the directory scanned by the auto-loader of the container to uninstall/undeploy artfifact.

h2. Content of the package "{{petals-esb-artfifact-repository}}"

In addition to the extension JAR file put in the directory {{/usr/share/petals-esb/extensions}}, this package arrives with one new sub-directory of the root directory of the Petals container data area:
* the sub-directory {{artifacts}} in which artifacts should be placed before installation/deployment according to the following sub-tree:
** {{sl}}: in which all JBI shared library archives are put,
** {{components}}: in which all JBI component archives are put,
** {{sa}}: in which all JBI service assembly archives are put.

h2. Content of the package "{{petals-esb-wsapi}}"

This package provides only extension JARs file put in the directory {{/usr/share/petals-esb/extensions}}.