diff --git a/backend_modules/libvirt/base/main.tf b/backend_modules/libvirt/base/main.tf
index dd9adec1b..01a7c4154 100644
--- a/backend_modules/libvirt/base/main.tf
+++ b/backend_modules/libvirt/base/main.tf
@@ -38,6 +38,7 @@ locals {
     slemicro52-ign           = "${var.use_mirror_images ? "http://${var.mirror}" : "http://download.opensuse.org"}/repositories/systemsmanagement:/sumaform:/images:/microos/images_52/SUSE-MicroOS.x86_64-sumaform.qcow2"
     slemicro53-ign           = "${var.use_mirror_images ? "http://${var.mirror}" : "http://download.opensuse.org"}/repositories/systemsmanagement:/sumaform:/images:/microos/images_53/SLE-Micro.x86_64-sumaform.qcow2"
     slemicro54-ign           = "${var.use_mirror_images ? "http://${var.mirror}" : "http://download.opensuse.org"}/repositories/systemsmanagement:/sumaform:/images:/microos/images_54/SLE-Micro.x86_64-sumaform.qcow2"
+    slemicro54               = "${var.use_mirror_images ? "http://${var.mirror}" : "http://download.opensuse.org"}/repositories/systemsmanagement:/sumaform:/images:/microos/images_54/SLE-Micro.x86_64-sumaform.qcow2"
     slemicro55o              = "${var.use_mirror_images ? "http://${var.mirror}" : "http://download.opensuse.org"}/repositories/systemsmanagement:/sumaform:/images:/microos/images_55/SLE-Micro.x86_64-sumaform.qcow2"
     slmicro60o               = "${var.use_mirror_images ? "http://${var.mirror}" : "http://download.opensuse.org"}/repositories/systemsmanagement:/sumaform:/images:/microos/images_60/SL-Micro.x86_64-sumaform.qcow2"
     suma43VM-ign             = "${var.use_mirror_images ? "http://${var.mirror}" : "http://download.suse.de"}/ibs/Devel:/Galaxy:/Manager:/4.3/images/SUSE-Manager-Server.x86_64-KVM-x86_64.qcow2"
diff --git a/backend_modules/libvirt/host/combustion b/backend_modules/libvirt/host/combustion
index bdd73b062..330ecd8d6 100644
--- a/backend_modules/libvirt/host/combustion
+++ b/backend_modules/libvirt/host/combustion
@@ -1,4 +1,8 @@
 #!/bin/bash
+# see https://github.com/openSUSE/combustion#simple-example
+# combustion: network
+
+%{ if image == "leapmicro55o" }
 # combustion: network prepare
 set -euxo pipefail
 
@@ -29,60 +33,91 @@ if [ "$${1-}" = "--prepare" ]; then
   exit 0
 fi
 
-# Redirect output to the console
-exec > >(exec tee -a /var/log/combustion) 2>&1
-
 # Name the Network Manager connections (final phase on real filesystem)
 nm_config 1 eth0 auto
 nm_config 2 eth1 manual
+%{ endif } # leapmicro55o
+
+
+# Redirect output to log file
+exec > >(exec tee -a /var/log/combustion) 2>&1
 
 # Set linux as password for root
 echo 'root:$6$3aQC9rrDLHiTf1yR$NoKe9tko0kFIpu0rQ2y/OzOOtbVvs0Amr2bx0T4cGf6aq8PG74EmVy8lSDJdbLVVFpOSzwELWyReRCiPHa7DG0' | chpasswd -e
 
-# SL Micro6: Add PermitRootLogin to sshd config
-%{ if image == "slmicro60o" }
-echo "PermitRootLogin yes" > /etc/ssh/sshd_config.d/root.conf
-echo "ChallengeResponseAuthentication yes" >> /etc/ssh/sshd_config.d/root.conf
-%{ endif }
-
 # Add a public ssh key and enable sshd
 systemctl enable sshd.service
 
 # Add the GPG keys
 ${ gpg_keys }
 
-# Add repositories
-zypper ar http://${ use_mirror_images ? mirror : "download.opensuse.org" }/repositories/SUSE:/CA/15.5/ ca_suse
 
-%{ if image == "leapmicro55o" }
-zypper ar http://${ use_mirror_images ? mirror : "download.opensuse.org" }/repositories/systemsmanagement:/Uyuni:/Master:/openSUSE_Leap_15-Uyuni-Client-Tools/openSUSE_Leap_15.0/ client_tools_repo
+### SLE Micro ###
+%{ if image == "slemicro51" }
+zypper ar http://${ use_mirror_images ? mirror : "download.opensuse.org" }/repositories/SUSE:/CA/SLE_15_SP1/ ca_suse
+zypper ar http://${ use_mirror_images ? mirror : "download.suse.de/ibs" }/SUSE/Products/SUSE-MicroOS/5.1/x86_64/product/ micro_pool_repo
+zypper ar http://${ use_mirror_images ? mirror : "download.suse.de/ibs" }/SUSE/Updates/SUSE-MicroOS/5.1/x86_64/update/ micro_update_repo
 
-%{ if container_server || container_proxy }
-%{ if product_version == "uyuni-master" || product_version == "uyuni-pr" }
-zypper ar http://${ use_mirror_images ? mirror : "download.opensuse.org" }/repositories/systemsmanagement:/Uyuni:/Master:/ContainerUtils/openSUSE_Leap_Micro_5.5/ container_utils
-%{ else }
-zypper ar http://${ use_mirror_images ? mirror : "download.opensuse.org" }/repositories/systemsmanagement:/Uyuni:/Stable:/ContainerUtils/openSUSE_Leap_Micro_5.5/ container_utils
+%{ if testsuite }
+zypper ar http://${ use_mirror_images ? mirror : "download.opensuse.org" }/repositories/systemsmanagement:/Uyuni:/Test-Packages:/Pool/rpm/ test_repo_rpm_pool
 %{ endif }
+%{ endif } # slemicro51
+
+
+%{ if image == "slemicro52" }
+zypper ar http://${ use_mirror_images ? mirror : "download.opensuse.org" }/repositories/SUSE:/CA/SLE_15_SP2/ ca_suse
+zypper ar http://${ use_mirror_images ? mirror : "download.suse.de/ibs" }/SUSE/Products/SUSE-MicroOS/5.2/x86_64/product/ micro_pool_repo
+zypper ar http://${ use_mirror_images ? mirror : "download.suse.de/ibs" }/SUSE/Updates/SUSE-MicroOS/5.2/x86_64/update/ micro_update_repo
+
+%{ if testsuite }
+zypper ar http://${ use_mirror_images ? mirror : "download.opensuse.org" }/repositories/systemsmanagement:/Uyuni:/Test-Packages:/Pool/rpm/ test_repo_rpm_pool
 %{ endif }
+%{ endif } # slemicro52
+
+
+%{ if image == "slemicro53" }
+zypper ar http://${ use_mirror_images ? mirror : "download.opensuse.org" }/repositories/SUSE:/CA/SLE_15_SP3/ ca_suse
+zypper ar http://${ use_mirror_images ? mirror : "download.suse.de/ibs" }/SUSE/Products/SLE-Micro/5.3/x86_64/product/ micro_pool_repo
+zypper ar http://${ use_mirror_images ? mirror : "download.suse.de/ibs" }/SUSE/Updates/SLE-Micro/5.3/x86_64/update/ micro_update_repo
 
 %{ if testsuite }
 zypper ar http://${ use_mirror_images ? mirror : "download.opensuse.org" }/repositories/systemsmanagement:/Uyuni:/Test-Packages:/Pool/rpm/ test_repo_rpm_pool
+%{ endif }
+%{ endif } # slemicro53
 
-# Leap repos are required to install expect
-zypper ar http://${ use_mirror_images ? mirror : "download.opensuse.org" }/distribution/leap/15.5/repo/oss/ leap_pool_repo
-zypper ar http://${ use_mirror_images ? mirror : "download.opensuse.org" }/update/leap/15.5/oss/ leap_update_repo
+
+%{ if image == "slemicro54" }
+zypper ar http://${ use_mirror_images ? mirror : "download.opensuse.org" }/repositories/SUSE:/CA/SLE_15_SP4/ ca_suse
+zypper ar http://${ use_mirror_images ? mirror : "download.suse.de/ibs" }/SUSE/Products/SLE-Micro/5.4/x86_64/product/ micro_pool_repo
+zypper ar http://${ use_mirror_images ? mirror : "download.suse.de/ibs" }/SUSE/Updates/SLE-Micro/5.4/x86_64/update/ micro_update_repo
+
+%{ if testsuite }
+zypper ar http://${ use_mirror_images ? mirror : "download.opensuse.org" }/repositories/systemsmanagement:/Uyuni:/Test-Packages:/Pool/rpm/ test_repo_rpm_pool
 %{ endif }
+%{ endif } # slemicro54
 
-%{ if container_runtime == "k3s" }
-zypper ar http://${ use_mirror_images ? mirror : "download.opensuse.org" }/update/leap/15.5/sle/ sle_update_repo
+
+# TODO
+#%{ if image == "slemicro55" }
+#%{ endif } # slemicro55
+
+
+# shared SLE Micro 5.x client tools
+%{ if image == "slemicro55" || image == "slemicro54" || image == "slemicro53" || image == "slemicro52" || image == "slemicro51" }
+zypper ar http://${ use_mirror_images ? mirror : "download.suse.de/ibs" }/Devel:/Galaxy:/Manager:/Head:/SLE15-SUSE-Manager-Tools/images/repo/SLE-15-Manager-Tools-POOL-x86_64-Media1/ tools_pool_repo
 %{ endif }
-%{ endif } # end of image == "leapmicro55o" block
+
 
 %{ if image == "slmicro60o" }
+# SL Micro 6.x does not allow this anymore
+echo "PermitRootLogin yes" > /etc/ssh/sshd_config.d/root.conf
+echo "ChallengeResponseAuthentication yes" >> /etc/ssh/sshd_config.d/root.conf
+
+zypper ar http://${ use_mirror_images ? mirror : "download.opensuse.org" }/repositories/SUSE:/CA/SLE_15_SP6/ ca_suse
 zypper ar http://${ use_mirror_images ? mirror : "download.suse.de/ibs"}/SUSE/Products/SL-Micro/6.0/x86_64/product/ os_pool_repo
 
 # SL Micro 6.0 is being used in both Uyuni and SUSE Manager
-# we do not support yet Leap Micro 6.0, even in Uyuni
+# we do not support Leap Micro 6.0, yet, even in Uyuni
 %{ if product_version == "uyuni-master" || product_version == "uyuni-released" || product_version == "uyuni-pr" }
 zypper ar http://${ use_mirror_images ? mirror : "download.opensuse.org"}/repositories/systemsmanagement:/Uyuni:/Master:/SLMicro6-Uyuni-Client-Tools/SL-Micro6/ client_tools_repo
 %{ else }
@@ -94,6 +129,36 @@ zypper ar http://${ use_mirror_images ? mirror : "download.opensuse.org" }/repos
 %{ endif }
 %{ endif } # end of image == "slmicro60o" block
 
+
+
+### openSUSE Leap Micro ###
+%{ if image == "leapmicro55o" }
+zypper ar http://${ use_mirror_images ? mirror : "download.opensuse.org" }/repositories/systemsmanagement:/Uyuni:/Master:/openSUSE_Leap_15-Uyuni-Client-Tools/openSUSE_Leap_15.0/ client_tools_repo
+zypper ar http://${ use_mirror_images ? mirror : "download.opensuse.org" }/repositories/SUSE:/CA/15.5/ ca_suse
+
+%{ if container_server || container_proxy }
+%{ if product_version == "uyuni-master" || product_version == "uyuni-pr" }
+zypper ar http://${ use_mirror_images ? mirror : "download.opensuse.org" }/repositories/systemsmanagement:/Uyuni:/Master:/ContainerUtils/openSUSE_Leap_Micro_5.5/ container_utils
+%{ else }
+zypper ar http://${ use_mirror_images ? mirror : "download.opensuse.org" }/repositories/systemsmanagement:/Uyuni:/Stable:/ContainerUtils/openSUSE_Leap_Micro_5.5/ container_utils
+%{ endif }
+%{ endif }
+
+
+%{ if testsuite }
+zypper ar http://${ use_mirror_images ? mirror : "download.opensuse.org" }/repositories/systemsmanagement:/Uyuni:/Test-Packages:/Pool/rpm/ test_repo_rpm_pool
+# Leap repos are required to install expect
+zypper ar http://${ use_mirror_images ? mirror : "download.opensuse.org" }/distribution/leap/15.5/repo/oss/ leap_pool_repo
+zypper ar http://${ use_mirror_images ? mirror : "download.opensuse.org" }/update/leap/15.5/oss/ leap_update_repo
+%{ endif }
+
+%{ if container_runtime == "k3s" }
+zypper ar http://${ use_mirror_images ? mirror : "download.opensuse.org" }/update/leap/15.5/sle/ sle_update_repo
+%{ endif }
+%{ endif }  # end leapmicro55o
+
+
+## additional repositories from the terraform file
 for i in ${additional_repos}; do
   name=$(echo $i | cut -d= -f1)
   url=$(echo $i | cut -d= -f2)
@@ -104,7 +169,7 @@ for i in ${additional_repos}; do
   %{ endif }
 done
 
-# Install packages
+#### Install packages ####
 PACKAGES="qemu-guest-agent avahi ca-certificates"
 
 %{ if container_runtime == "podman" }
@@ -144,3 +209,6 @@ zypper --non-interactive install $PACKAGES
 
 # Leave a marker
 echo "Configured with combustion" > /etc/issue.d/combustion
+
+# Close outputs and wait for tee to finish.
+exec 1>&- 2>&-; wait;
diff --git a/backend_modules/libvirt/host/main.tf b/backend_modules/libvirt/host/main.tf
index fa3ecdf0a..e022f279d 100644
--- a/backend_modules/libvirt/host/main.tf
+++ b/backend_modules/libvirt/host/main.tf
@@ -4,7 +4,7 @@ locals {
   manufacturer = lookup(var.provider_settings, "manufacturer", "Intel")
   product      = lookup(var.provider_settings, "product", "Genuine")
   x86_64_v2_images = ["almalinux9o", "libertylinux9o", "oraclelinux9o", "rocky9o", "slmicro60o"]
-  combustion_images  = ["leapmicro55o", "slmicro60o"]
+  combustion_images  = ["leapmicro55o", "slemicro54", "slmicro60o"]
   gpg_keys = [
     for key in fileset("salt/default/gpg_keys/", "*.key"): {
         path = "/etc/gpg_keys/${key}"
diff --git a/salt/minion/init.sls b/salt/minion/init.sls
index 9da7a0075..dea24ae26 100644
--- a/salt/minion/init.sls
+++ b/salt/minion/init.sls
@@ -7,8 +7,7 @@ include:
   - minion.reflector
 
 {% if not grains['osfullname'] in ['SLE Micro', 'SL-Micro'] %}
-# Dependencies already satisfied by the images
-# https://build.opensuse.org/project/show/systemsmanagement:sumaform:images:microos
+# Dependencies already satisfied by cloud-init/combustion
 minion_package:
   pkg.installed:
 {% if grains['install_salt_bundle'] %}