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We are Installing CMS and Topology using PowerShell scripts.

In our installation scenario we have two servers in a load balanced configuration.When we run the CMS installer both in the GUI and as a script we get the same behaviour.Installing both CMS and Topology on port 80 with Host headers for the load balanced endpoints cms.dev.domain.com and topology.dev.domain.com

The specified configuration conflicts with another application or Web site configured on this machine. Select a different IP address, port number or host header.

I tried with 3-4 different ports nothing worked.

Before that error occurs below message displayed

Setting string variable 'WEB_INFOS_SHARED' to value '3:SDL Web Topology Manager:(All Unassigned):topology.dev.domain.com:82'

Try to resolve the above issue using the below SDL Community Article Nothing worked.

https://gateway.sdl.com/apex/communityknowledge?articleName=Unable-to-install-the-CME-and-Topology-Manager-websites-in-the-same-port-in-SDL-Web-8

Appreciate your help

  • Can you explain why you want to have CMS website and Topology Manager service on the same port? – Rick Pannekoek Sep 13 '18 at 19:08
  • As per client They discouraged to use other ports – Prasanna K Gollamudi Sep 15 '18 at 0:46
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When CM Servers are on load balanced configurations by following below approach we resolved our issue.

  1. Insert the host headers into each servers hosts file on the localhost loopback address 127.0.0.1 as shown below: 127.0.0.1 cms.dev.domain.com 127.0.0.1 topology.dev.domain.com
  2. Save & Close Host File
  3. Run the SDL CMS installer
  4. Remove the host headers from each servers hosts file

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