VMware VCLOUD REQUEST MANAGER 1.0.0 Manuale Utente Scaricare il pdf (Pagina 19)

Chapter 1. zenwebserver

1.1. About

Use zenwebserver to deploy and manage multiple Zope instances. It includes a software load balancer (nginx),

and replaces zopectl for Zenoss Service Dynamics users.

1.2. Prerequisites

Prerequisite Restriction

Product Resource Manager 4.1.1

Required ZenPacks ZenPacks.zenoss.WebScale

Table 1.1. Prerequisites

1.3. Installation

To use zenwebserver, install the WebScale ZenPack.

Note

This ZenPack is included by default in the Zenoss Enterprise ZenPacks RPM.

Enter this command:

zenpack --install ZenPacks.zenoss.WebScale-1.0.0-py2.7-Platform-Architecture.egg

The installation process replaces zopectl in the startup script (or in the daemons.txt file) with zenwebserver.

After installation, use zenwebserver as the control script to manage the application server.

Note

If you have multiple Zope instances deployed behind a custom load balancer setup, installation of this ZenPack

will not install zenwebserver as your UI control script. You must install it manually after determining and

executing your migration strategy.

1.4. Usage

zenwebserver Arguments Options Targets

1.4.1. Arguments

Valid arguments are:

• run - Starts Zope in the foreground, on the port normally used by the load balancer. Neither the load balancer

nor other Zope servers are used.

• start - Starts the load balancer and Zope servers. If any are running already, they are ignored.

• stop - Stops the load balancer and Zope servers. If any are stopped already, they are ignored.

• restart - Stops and then restarts the load balancer and Zope servers. To minimize downtime, the load

balancer is restarted first, and then each Zope server in turn. This ensures that the Zope server pool is

never empty.

• status - Provides status information. It prints the status of the load balancer, including its PID.

• deploy - Creates or destroys Zope instances. It adds or removes instances from the server pool and up-

dates the load balancer to reference the altered server pool. If the load balancer is running already, then

its configuration is reloaded without stopping it.

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VMware VCLOUD REQUEST MANAGER 1.0.0 Manuale Utente Pagina 19