h1. Introduction

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Once Petals ESB is installed through the Debian package, it can be started or stopped with two different ways:
* at system level: the Petals ESB containers are running with a dedicated system user '{{petals}}'. To use in production mode,
* at user level: the Petals ESB containers are running as a process of the user that launches them. To use in a development mode.

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h1. Starting Petals ESB

h2. Starting Petals ESB at system level

h3. Automatic start

The Petals ESB package comes with an automatic startup script based on System V ({{initd}}) to automatically launch Petals ESB containers as system services when the host boots.
To start the Petals containers, for example, launch the following command on a Ubuntu box:
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cdeneux@sph-latitude-D630:~$ sudo service petals-esb start
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Two natures of containers are identified:
* the "available containers" that are configured. These containers are to configure into the directory {{/etc/petals-esb/container-available}}. One sub-directory by container.
* and, the "enable containers" that are automatically started. These containers are to configure into the directory {{/etc/petals-esb/container-enable}}. One sub-directory by container.

As "Enable containers" are a subset of "Available containers", we recommend to put the configuration of a container into a sub-directory of {{/etc/petals-esb/container-available}}, and create a symbolic link on this sub-directory into {{/etc/petals-esb/container-enable}} to "enable" it.

{info}It's not possible to automatically start a container in debug mode. Use a manual startup.{info}

{note}Caution: The automatic startup starts all Petals ESB containers declared in the directory {{/etc/petals-esb/container-enable}}. So if you add a new Petals ESB container in this directory, and use the command "{{service petals-esb start}}", all other Petals ESB containers will be also started, and as they are already started, errors will occurs.{note}

h3. Manual start

A Petals ESB container configured at system level (its configuration is located in {{/etc/petals-esb/container-available}}, and uses sub-directories of {{/var/lib/petals-esb}} and {{/var/log/petals-esb}}) can be started using a manual startup, for example, to test its configuration. This startup is done using the same mechanism as a Petals ESB container configured at user level, but using the system user '{{petals}}' to be compliant with ACL of the filesystem:
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sudo -u petals petals-esb -u <container-configuration>
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where {{<container-configuration>}} is the URL of the container configuration (ie, URL locating the file {{server.properties}})
{quote}For example, to launch the default sample container
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sudo -u petals petals-esb -u file:///etc/petals-esb/container-available/default/server.properties
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h1. Stopping Petals ESB

h2. Stopping Petals ESB at system level

h2. Stopping Petals ESB at user level