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Steps to Reproduce:
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Add CreateBalancers 1 to the httpd configuration.

Create a dummy vhost like:

<VirtualHost *:80> ServerAdmin webmaster@dummy-host.example.com DocumentRoot "/usr/local/apache2/docs/dummy-host.example.com" ServerName dummy-host.example.com ServerAlias www.dummy-host.example.com ErrorLog "logs/dummy-host.example.com-error_log" CustomLog "logs/dummy-host.example.com-access_log" common </VirtualHost>

Visit the vhost address: the index file is served.

Let an application server join the pool.

Visit the vhost address again: the request is proxied.
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Add CreateBalancers 1 to the httpd configuration. Create a dummy vhost like: <VirtualHost *:80> ServerAdmin webmaster@dummy-host.example.com DocumentRoot "/usr/local/apache2/docs/dummy-host.example.com" ServerName dummy-host.example.com ServerAlias www.dummy-host.example.com ErrorLog "logs/dummy-host.example.com-error_log" CustomLog "logs/dummy-host.example.com-access_log" common </VirtualHost> Visit the vhost address: the index file is served. Let an application server join the pool. Visit the vhost address again: the request is proxied.

The documentation mentions:

CreateBalancers

1 — Don’t create balancers (requires at least one ProxyPass/ProxyPassMatch to define the balancer names).

However using this option still creates balancers in every vhost.

relates to

MODCLUSTER-430 CreateBalancers behave the same with option 0 or 2