[1-click] In 1-click template for AD, use an AL2023 with the AdDomainAdminNode, rather than AL2.

Signed-off-by: Giacomo Marciani <mgiacomo@amazon.com>

Author: gmarciani

cloudformation/ad/ad-integration.yaml

@@ -66,7 +66,7 @@ Parameters:
   AdminNodeAmiId:
     Description: AMI for the Admin Node
     Type: 'AWS::SSM::Parameter::Value<AWS::EC2::Image::Id>'
-    Default: '/aws/service/ami-amazon-linux-latest/amzn2-ami-hvm-x86_64-gp2'
+    Default: '/aws/service/ami-amazon-linux-latest/al2023-ami-kernel-default-x86_64'
 
 Transform: AWS::Serverless-2016-10-31
 
@@ -387,7 +387,6 @@ Resources:
               samba-common-tools: []
               krb5-workstation: []
               openldap-clients: []
-              policycoreutils-python: []
               openssl: []
     Properties:
       IamInstanceProfile:
@@ -416,25 +415,25 @@ Resources:
               echo "Domain Name: ${DirectoryDomain}"
               echo "Domain Certificate Secret: ${DomainCertificateSecretArn}"
               echo "Domain Private Key Secret: ${DomainPrivateKeySecretArn}"
-              cat << EOF > /etc/resolv.conf
-              search           ${DirectoryDomain}
-              nameserver       ${DnsIp1}
-              nameserver       ${DnsIp2}
+              
+              mkdir -p /etc/systemd/resolved.conf.d
+              cat << EOF > /etc/systemd/resolved.conf.d/pcluster-ad-domain-dns-server.conf
+              [Resolve]
+              DNS=${DnsIp1} ${DnsIp2}
+              Domains=~.
               EOF
-              sed -i 's/PEERDNS=.*/PEERDNS=no/' /etc/sysconfig/network-scripts/ifcfg-eth0
-              chattr +i /etc/resolv.conf
+              service systemd-resolved restart
+              
               ADMIN_PW="${AdminPassword}"
               
               attempt=0
               max_attempts=5
               until [ $attempt -ge $max_attempts ]; do
                 attempt=$((attempt+1))
-                echo "[DEBUG] Content of /etc/resolv.conf is:"
-                cat /etc/resolv.conf
-                echo "[DEBUG] Resolving ${DirectoryDomain} ..."
-                dig ${DirectoryDomain} 
+                echo "[DEBUG] Checking domain name resolution for ${DirectoryDomain} ..."
+                dig ${DirectoryDomain}
                 echo "Joining domain (attempt $attempt/$max_attempts) ..."
-                echo "$ADMIN_PW" | sudo realm join -U "${Admin}" "${DirectoryDomain} --verbose" && echo "Domain joined" && break
+                echo "$ADMIN_PW" | sudo realm join -U "${Admin}" "${DirectoryDomain}" --verbose && echo "Domain joined" && break
                 sleep 10
               done