Confusão configurando um simples clustering tomcat6 no Ubuntu 12.04 usando a página mod_jk: status não será mostrada

Question

estou um pouco confuso ao configurar 2 tomcat6 cluster de instâncias em um servidor ubuntu limpo 12.04. Eu não instalei o padrão tomcat6 i usei tomcat6-user ' tomcat6-instance-create para criar 2 instâncias. Estou usando o blogs.encodo.ch tutorial, infelizmente eu não encontrei nenhum tutorial Usando o Ubuntu com como o apache2 está configurado como o Ubuntu 12.o4. Quero dizer com isso, a estrutura da pasta sites-available/enabled e mods-available/enabled que o Ubuntu usa.
Eu instalei libapache2-mod-jk e mods-enabled tem jk.load, jk.conf.

server instance-1 uses port 8081 for http, port 8009 for ajp with jvmRoute="worker1" and instance-2 uses port 8082 for http, port 8010 for ajp with jvmRoute="worker2"

#/etc/apache2/workers.propeties
 worker.list=loadbalancer,jk-status

#setup instance-1
worker.instance-1.port=8009
worker.instance-1.host=localhost
worker.instance-1.type=ajp13
#worker.instance-1.lbfactor=50

#setup instance-2
worker.instance-2.port=8010
worker.instance-2.host=localhost
worker.instance-2.type=ajp13
#worker.instance-2.lbfactor=100

#setup the load-balancer
worker.loadbalancer.type=lb
worker.loadbalancer.balance_workers=instance-1,instance-2
worker.loadbalancer.sticky_session=True
#worker.loadbalancer.sticky_session_force=True

# Status worker for managing load balancer
worker.status.type=jk-status

aqui está o /etc/apache2/mods-available/jk.conf

<IfModule jk_module>
    JkWorkersFile /etc/apache2/workers.properties

    JkLogFile /var/log/apache2/mod_jk.log

    JkLogLevel info

    JkShmFile /var/log/apache2/jk-runtime-status

    JkWatchdogInterval 60

    <Location /jk-status>
    # Inside Location we can omit the URL in JkMount
    JkMount jk-status
    Order deny,allow
    Deny from all
    Allow from 127.0.0.1 xxx.xxx.xxx.xxx
    </Location>
    <Location /jk-manager>
    # Inside Location we can omit the URL in JkMount
    JkMount jk-manager
    Order deny,allow
    Deny from all
    Allow from 127.0.0.1 xxx.xxx.xxx.xxx
    </Location>

    # Example for Mounting a context to the worker "balancer"
    # The URL syntax "a|b" instantiates two mounts at once,
    # the first one is "a", the second one is "ab".
    # JkMount /myapp|/* balancer

    # Example for UnMounting requests for all workers
    # using a simple URL pattern
    # Since: 1.2.26
    # JkUnMount /myapp/static/* *

    # Example for UnMounting requests for a named worker
    # JkUnMount /myapp/images/* balancer

    # Example for UnMounting requests using regexps
    # SetEnvIf REQUEST_URI "\.(htm|html|css|gif|jpg|js)$" no-jk

    # Example for setting a reply timeout depending on the requets URL
    # Since: 1.2.27
    # SetEnvIf Request_URI "/transactions/" JK_REPLY_TIMEOUT=600000

    # Example for disabling reply timeouts for certain request URLs
    # Since: 1.2.27
    # SetEnvIf Request_URI "/reports/" JK_REPLY_TIMEOUT=0
</IfModule>

aqui é meu virtualhost

<VirtualHost *:80>
  ServerAdmin [email protected]
  ServerAlias live.myserver.com
  #DocumentRoot /var/www
  ServerName go2.myserver.com
  JkMount /* loadbalancer
  JkMount /status/* jk-status
  JkMount /jk-manager/* jk-status
  #Loglevel warn
  ErrorLog /var/log/apache2/go.myserver_error_log
  CustomLog /var/log/apache2/go.myserver_access_log combined
</VirtualHost>

EDITAR: após algumas horas de luta, o balanceamento de carga parece funcionar. Só que não consigo acessar a página do gerenciador do balanceador de carga via xxx.xxx.xxx.xxx/jk-status nor xxx.xxx.xxx.xxx/jk-manager . Há também essas entradas no arquivo mod_jk.log

[Mon May 06 13:34:48.633 2013] [9845:139723554592576] [info] init_jk::mod_jk.c (3252): mod_jk/1.2.32 () initialized
[Mon May 06 13:34:48.633 2013] [9845:139723554592576] [error] uri_worker_map_ext::jk_uri_worker_map.c (506): Could not find worker with name 'jk-manager' in uri map post processing.
[Mon May 06 13:34:48.633 2013] [9845:139723554592576] [error] uri_worker_map_ext::jk_uri_worker_map.c (506): Could not find worker with name 'jk-status' in uri map p/var/log/apache2/mod_jk.log

Pergunta 1 : o que está faltando? porque não funciona?

Pergunta 2 : o #DocumentRoot /var/www é realmente necessário?

Pergunta 3 : qual é a diferença entre o JkMount no IfModule do arquivo jk.conf e o JkMount do virtualhost

Por favor, ajude-me a configurar corretamente. obrigado