Remove cloud_dns from the SlurmctldParameters to avoid the slurm fanout IP address update issue. It is also not required since we update the IP addresses when instances launch (#2755)

Author: dreambeyondorange

CHANGELOG.md

@@ -17,6 +17,7 @@ This file is used to list changes made in each version of the AWS ParallelCluste
 
 **BUG FIXES**
 - Fix issue with `SharedStorageType: Efs` not bootstrapping on ARM instances.
+- Remove `cloud_dns` from the `SlurmctldParameters` in the Slurm config to avoid Slurm fanout issues.  This is also not required since we set the IP addresses on instance launch
 
 3.9.1
 ------

cookbooks/aws-parallelcluster-slurm/templates/default/slurm/slurm.conf.erb

@@ -29,7 +29,7 @@ LaunchParameters=enable_nss_slurm
 SlurmctldParameters=idle_on_node_suspend,power_save_min_interval=30,node_reg_mem_percent=<%= node['cluster']['slurm_node_reg_mem_percent'] %>
 TreeWidth=65533
 <% else -%>
-SlurmctldParameters=idle_on_node_suspend,power_save_min_interval=30,cloud_dns,node_reg_mem_percent=<%= node['cluster']['slurm_node_reg_mem_percent'] %>
+SlurmctldParameters=idle_on_node_suspend,power_save_min_interval=30,node_reg_mem_percent=<%= node['cluster']['slurm_node_reg_mem_percent'] %>
 TreeWidth=30
 <% end -%>
 SuspendProgram=<%= node['cluster']['scripts_dir'] %>/slurm/slurm_suspend