Stop webserver on particular node using wsadmin (jython)

Question

Is there any way to stop webserver on particular node using wsadmin? Using

print AdminConfig.list('WebServer')

I got the list of all webservers with coresponding nodes

webserver1(cells/dmgrCell01/nodes/01Node01/servers/webserver1|server.xml#WebServer_0000000000)
webserver2(cells/dmgrCell01/nodes/01Node02/servers/webserver2|server.xml#WebServer_1111111111)
webserver3(cells/dmgrCell01/nodes/01Node03/servers/webserver3|server.xml#WebServer_2222222222)

According to IBM I need to define variable this way:

na = AdminControl.queryNames('type=NodeAgent,node=mynode,*')

so using type WebServer:

webserver = AdminControl.queryNames('type=WebServer,node=mynode,*')

but I got empty value

How to build this query?

Answer 1

To stop a server you need to invoke the stop command passing the correct MBean.

If AdminControl.queryNames(...) returns an empty string it means that the MBean cannot be found using the AdminControl module (which manages only the running resources).

This could be caused by 2 major reasons:

• the target is already stopped (the MBean cannot be found using the AdminControl module (which manages only the running resources))
• the requested resource does not exists (and so it's not running)

Stop running server

Try to build your query like this, then let me know:

server = AdminControl.queryNames('WebSphere:cell=myCell,node=myNode,name=myServer,type=WebServer,*')

# Empty string ==> Server stopped
if server:
    AdminControl.invoke(server, 'stop')

Stop from configuration ID

If you have the configuration ID of the resource, you can use the AdminConfig.getObjectName(...) to retrieve the running MBean corresponding to the resource configuration ID:

# Get the configuration id from the configuration path
configuration_id = AdminConfig.getid("/Cell:myCell/WebServer:myServer/")

server = AdminConfig.getObjectName(configuration_id)

# Empty string ==> Server stopped
if server:
    AdminControl.invoke(server, 'stop')

Answer 2

Let's say you have deployed the webserver1 on Node01, you can run the following query command at wsadmin command prompt and test it.

webserver=AdminControl.queryNames("node="+AdminControl.getNode( )+",type=WebServer,*" )

once the above command executes, it will store the result into the variable webserer. To check the content of the variable you can simply use webserver and hit enter, that's it ! it will show you the MBean content.