Changing the default Spack Root directory from /home to /opt

cookbooks/aws-parallelcluster-environment/attributes/environment.rb

@@ -60,3 +60,5 @@
 default['cluster']['internal_initial_shared_dir'] = "#{node['cluster']['base_dir']}/init_shared"
 
 default['cluster']['head_node_private_ip'] = nil
+
+default['cluster']['spack_shared_dir'] = "#{node['cluster']['base_dir']}/spack"

cookbooks/aws-parallelcluster-environment/resources/spack/partial/_spack_common.rb

@@ -15,10 +15,10 @@
 default_action :setup
 
 property :spack_user, String, required: false,
-         default: node['cluster']['cluster_user']
+         default: 'root'
 
 property :spack_root, String, required: false,
-         default: "/home/#{node['cluster']['cluster_user']}/spack"
+         default: "#{node['cluster']['spack_shared_dir']}"
 
 action :install_spack do
   return if on_docker?
@@ -59,16 +59,14 @@
   end
 
   # Pull architecture dependent package config
-  begin
-    template "#{spack_configs_dir}/packages.yaml" do
-      cookbook 'aws-parallelcluster-environment'
-      source "spack/packages-#{arch_target}.yaml.erb"
-      owner new_resource.spack_user
-      group new_resource.spack_user
-      variables(libfabric_version: libfabric_version)
-    end
-  rescue Chef::Exceptions::FileNotFound
-    Chef::Log.warn "Could not find template for #{arch_target}"
+
+  template "#{spack_configs_dir}/packages.yaml" do
+    cookbook 'aws-parallelcluster-environment'
+    source "spack/packages-#{arch_target}.yaml.erb"
+    owner new_resource.spack_user
+    group new_resource.spack_user
+    variables(libfabric_version: libfabric_version)
+    only_if { ::File.exist?( "spack/packages-#{arch_target}.yaml.erb") }
   end
 
   cookbook_file "#{spack_configs_dir}/modules.yaml" do