diff --git a/README.rst b/README.rst
index 9dcec6d..eec572b 100644
--- a/README.rst
+++ b/README.rst
@@ -512,6 +512,18 @@
         libvirt:
           volume_use_multipath: True
 
+To disable or enable StrictHostKeyChecking and discover
+compute nodes fingerprints the below pillar should be used:
+
+.. code-block:: yaml
+
+    nova:
+      compute:
+        ....
+         openssh:
+           stricthostkeychecking: True
+           discover_compute_hosts: True
+
 Client role
 -----------
 
@@ -718,6 +730,26 @@
       libvirt:
         cpu_model: IvyBridge
 
+RNG (Random Number Generator) device path
+----------------------
+
+The path to an RNG (Random Number Generator) device that will be used
+as the source of entropy on the host.
+The recommended source of entropy is /dev/urandom.
+Permitted options are: /dev/random, /dev/urandom or /dev/hwrng.
+Default: /dev/urandom
+
+.. code-block:: yaml
+
+  nova:
+    controller:
+      libvirt:
+        rng_dev_path: /dev/random
+
+    compute:
+      libvirt:
+        rng_dev_path: /dev/random
+
 
 Nova compute workarounds
 ------------------------
diff --git a/_states/novav21.py b/_states/novav21.py
index b9f9dd0..7b6452b 100644
--- a/_states/novav21.py
+++ b/_states/novav21.py
@@ -361,6 +361,43 @@
     return ret
 
 
+def instances_mapped_to_cell(name, timeout=60, runas='nova'):
+    """Ensure that all instances in the cell are mapped
+
+    :param name: cell name.
+    :param timeout: amount of time in seconds mapping process should finish in.
+    :param runas: username to run the shell commands under.
+    """
+    test = __opts__.get('test', False)
+    cell_uuid = __salt__['cmd.shell'](
+        "nova-manage cell_v2 list_cells 2>/dev/null | "
+        "awk '/%s/ {print $4}'" % name, runas=runas)
+    result = {'name': name, 'changes': {}, 'result': False}
+    if not cell_uuid:
+        result['comment'] = (
+            'Failed to map all instances in cell {0}, it does not exist'
+            .format(name))
+        return result
+    start_time = time.time()
+    if not test:
+        while True:
+            rc = __salt__['cmd.retcode'](
+                'nova-manage cell_v2 map_instances --cell_uuid %s' % cell_uuid,
+                runas=runas)
+            if rc == 0 or time.time() - start_time > timeout:
+                break
+        if rc != 0:
+            result['comment'] = (
+                'Failed to map all instances in cell {0} in {1} seconds'
+                .format(name, timeout))
+            return result
+    result['comment'] = 'All instances mapped in cell {0}'.format(name)
+    if test:
+        result['comment'] = 'TEST: {}'.format(result['comment'])
+    result['result'] = True
+    return result
+
+
 def _db_version_update(db, version, human_readable_resource_name):
     existing_version = __salt__['cmd.shell'](
         'nova-manage %s version 2>/dev/null' % db)
diff --git a/nova/compute.sls b/nova/compute.sls
index 6103c14..fb622c2 100644
--- a/nova/compute.sls
+++ b/nova/compute.sls
@@ -76,11 +76,31 @@
 /var/lib/nova/.ssh/config:
   file.managed:
   - user: nova
-  - contents: StrictHostKeyChecking no
+  - contents: StrictHostKeyChecking {% if compute.get('openssh',{}).get('stricthostkeychecking', False) %}yes{% else %}no{% endif %}
   - mode: 400
   - require:
     - pkg: nova_compute_packages
 
+{%- if compute.get('openssh',{}).get('discover_compute_hosts', False) %}
+
+  {%- set cmp_nodenames = [] %}
+
+  {%- for cmp_nodes, node_grains in salt['mine.get']('I@nova:compute', 'grains.items', 'compound').items() %}
+    {%- if node_grains.fqdn is defined %}
+      {%- do cmp_nodenames.append(node_grains.fqdn) %}
+    {%- endif %}
+  {%- endfor %}
+
+  {%- for cmp_node in cmp_nodenames %}
+ssh_host_discover_{{ cmp_node }}_fingerprint:
+  ssh_known_hosts.present:
+    - name: {{ cmp_node }}
+    - user: nova
+    - require:
+      - file: /var/lib/nova/.ssh/config
+  {%- endfor %}
+{%- endif %}
+
 {%- endif %}
 
 {%- if not pillar.nova.get('controller',{}).get('enabled') %}
@@ -586,4 +606,23 @@
   - name: 'systemd-tmpfiles --create'
 {%- endif %}
 
+{%- if compute.get('libvirt', {}).rng_dev_path is defined and compute.libvirt.rng_dev_path == '/dev/hwrng' %}
+create_hwrng_udev_rule_compute:
+  file.managed:
+    - name: /etc/udev/rules.d/90-hwrng.rules
+    - source: salt://nova/files/90-hwrng.rules
+    - user: root
+    - group: root
+    - mode: 0644
+    - onlyif: test -c /dev/hwrng
+
+trigger_hwrng_udev_compute:
+  cmd.run:
+    - name: udevadm trigger /dev/hwrng
+    - onchanges:
+      - file: /etc/udev/rules.d/90-hwrng.rules
+
+{%- endif %}
+
+
 {%- endif %}
diff --git a/nova/controller.sls b/nova/controller.sls
index 68a9bb4..2b0a669 100644
--- a/nova/controller.sls
+++ b/nova/controller.sls
@@ -486,4 +486,23 @@
 
 {%- endif %}
 
+{%- if controller.get('libvirt', {}).rng_dev_path is defined and controller.libvirt.rng_dev_path == '/dev/hwrng' %}
+create_hwrng_udev_rule_controller:
+  file.managed:
+    - name: /etc/udev/rules.d/90-hwrng.rules
+    - source: salt://nova/files/90-hwrng.rules
+    - user: root
+    - group: root
+    - mode: 0644
+    - onlyif: test -c /dev/hwrng
+
+trigger_hwrng_udev_controller:
+  cmd.run:
+    - name: udevadm trigger /dev/hwrng
+    - onchanges:
+      - file: /etc/udev/rules.d/90-hwrng.rules
+
+{%- endif %}
+
+
 {%- endif %}
diff --git a/nova/files/90-hwrng.rules b/nova/files/90-hwrng.rules
new file mode 100644
index 0000000..b817b2b
--- /dev/null
+++ b/nova/files/90-hwrng.rules
@@ -0,0 +1,2 @@
+SUBSYSTEM=="misc", KERNEL=="hw_random", NAME="hwrng", GROUP="kvm", MODE="0660"
+
diff --git a/nova/files/mitaka/nova-compute.conf.Debian b/nova/files/mitaka/nova-compute.conf.Debian
index b570570..05ec5d1 100644
--- a/nova/files/mitaka/nova-compute.conf.Debian
+++ b/nova/files/mitaka/nova-compute.conf.Debian
@@ -47,6 +47,10 @@
 cpu_allocation_ratio = {{ compute.cpu_allocation_ratio }}
 {%- endif %}
 
+{%- if compute.disk_allocation_ratio is defined %}
+disk_allocation_ratio = {{ compute.disk_allocation_ratio }}
+{%- endif %}
+
 remove_unused_original_minimum_age_seconds=86400
 image_service=nova.image.glance.GlanceImageService
 
diff --git a/nova/files/newton/nova-compute.conf.Debian b/nova/files/newton/nova-compute.conf.Debian
index 2540a43..c7ef466 100644
--- a/nova/files/newton/nova-compute.conf.Debian
+++ b/nova/files/newton/nova-compute.conf.Debian
@@ -63,6 +63,10 @@
 cpu_allocation_ratio = {{ compute.cpu_allocation_ratio }}
 {%- endif %}
 
+{%- if compute.disk_allocation_ratio is defined %}
+disk_allocation_ratio = {{ compute.disk_allocation_ratio }}
+{%- endif %}
+
 #
 # Defines which physical CPUs (pCPUs) can be used by instance
 # virtual CPUs (vCPUs).
diff --git a/nova/files/ocata/nova-compute.conf.Debian b/nova/files/ocata/nova-compute.conf.Debian
index 9dc2694..44bf3f1 100644
--- a/nova/files/ocata/nova-compute.conf.Debian
+++ b/nova/files/ocata/nova-compute.conf.Debian
@@ -610,7 +610,11 @@
 # * Any valid positive integer or float value
 #  (floating point value)
 # Minimum value: 0
+{%- if compute.disk_allocation_ratio is defined %}
+disk_allocation_ratio = {{ compute.disk_allocation_ratio }}
+{%- else  %}
 #disk_allocation_ratio=0.0
+{%- endif %}
 
 #
 # Console proxy host to be used to connect to instances on this host. It is the
diff --git a/nova/files/pike/nova-compute.conf.Debian b/nova/files/pike/nova-compute.conf.Debian
index 8acfe3f..314bf29 100644
--- a/nova/files/pike/nova-compute.conf.Debian
+++ b/nova/files/pike/nova-compute.conf.Debian
@@ -618,7 +618,11 @@
 # * Any valid positive integer or float value
 #  (floating point value)
 # Minimum value: 0
+{%- if compute.disk_allocation_ratio is defined %}
+disk_allocation_ratio = {{ compute.disk_allocation_ratio }}
+{%- else  %}
 #disk_allocation_ratio=0.0
+{%- endif %}
 
 #
 # Console proxy host to be used to connect to instances on this host. It is the
@@ -6550,6 +6554,9 @@
 # A path to a device that will be used as source of entropy on the host.
 # Permitted options are: /dev/random or /dev/hwrng (string value)
 #rng_dev_path=<None>
+{%- if compute.get('libvirt', {}).rng_dev_path is defined %}
+rng_dev_path={{ compute.libvirt.rng_dev_path }}
+{%- endif %}
 
 # For qemu or KVM guests, set this option to specify a default machine type per
 # host architecture. You can find a list of supported machine types in your
diff --git a/nova/files/pike/nova-controller.conf.Debian b/nova/files/pike/nova-controller.conf.Debian
index 717cfe5..3bdcfd6 100644
--- a/nova/files/pike/nova-controller.conf.Debian
+++ b/nova/files/pike/nova-controller.conf.Debian
@@ -6525,6 +6525,9 @@
 # A path to a device that will be used as source of entropy on the host.
 # Permitted options are: /dev/random or /dev/hwrng (string value)
 #rng_dev_path=<None>
+{%- if controller.get('libvirt', {}).rng_dev_path is defined %}
+rng_dev_path={{ controller.libvirt.rng_dev_path }}
+{%- endif %}
 
 # For qemu or KVM guests, set this option to specify a default machine type per
 # host architecture. You can find a list of supported machine types in your
diff --git a/nova/files/queens/nova-compute.conf.Debian b/nova/files/queens/nova-compute.conf.Debian
index 1e9e5d0..1298a84 100644
--- a/nova/files/queens/nova-compute.conf.Debian
+++ b/nova/files/queens/nova-compute.conf.Debian
@@ -666,7 +666,11 @@
 # * Any valid positive integer or float value
 #  (floating point value)
 # Minimum value: 0
+{%- if compute.disk_allocation_ratio is defined %}
+disk_allocation_ratio = {{ compute.disk_allocation_ratio }}
+{%- else  %}
 #disk_allocation_ratio = 0.0
+{%- endif %}
 
 #
 # Console proxy host to be used to connect to instances on this host.
@@ -7144,6 +7148,9 @@
 # host. Permitted options are: /dev/random or /dev/hwrng (string
 # value)
 #rng_dev_path = <None>
+{%- if compute.get('libvirt', {}).rng_dev_path is defined %}
+rng_dev_path={{ compute.libvirt.rng_dev_path }}
+{%- endif %}
 
 # For qemu or KVM guests, set this option to specify a default machine
 # type per host architecture. You can find a list of supported machine
diff --git a/nova/files/queens/nova-controller.conf.Debian b/nova/files/queens/nova-controller.conf.Debian
index 04498c7..0a2758f 100644
--- a/nova/files/queens/nova-controller.conf.Debian
+++ b/nova/files/queens/nova-controller.conf.Debian
@@ -655,7 +655,11 @@
 # * Any valid positive integer or float value
 #  (floating point value)
 # Minimum value: 0
+{%- if controller.disk_allocation_ratio is defined %}
+disk_allocation_ratio = {{ controller.disk_allocation_ratio }}
+{%- else  %}
 #disk_allocation_ratio = 0.0
+{%- endif %}
 
 #
 # Console proxy host to be used to connect to instances on this host.
@@ -6991,6 +6995,9 @@
 # host. Permitted options are: /dev/random or /dev/hwrng (string
 # value)
 #rng_dev_path = <None>
+{%- if controller.get('libvirt', {}).rng_dev_path is defined %}
+rng_dev_path={{ controller.libvirt.rng_dev_path }}
+{%- endif %}
 
 # For qemu or KVM guests, set this option to specify a default machine
 # type per host architecture. You can find a list of supported machine
diff --git a/nova/map.jinja b/nova/map.jinja
index 370f517..d9fea7b 100644
--- a/nova/map.jinja
+++ b/nova/map.jinja
@@ -295,20 +295,6 @@
               'warn': '15%',
               'crit': '5%',
         },
-        'error_log_rate': {
-              'warn': 0.2,
-        },
-        'services_failed_warning_threshold_percent': 0.3,
-        'services_failed_critical_threshold_percent': 0.6,
-        'computes_failed_warning_threshold_percent': 0.25,
-        'computes_failed_critical_threshold_percent': 0.5,
-        'cpu_minor_threshold': 0.85,
-        'cpu_major_threshold': 0.95,
-        'ram_major_threshold': 0.85,
-        'ram_critical_threshold': 0.95,
-        'disk_major_threshold': 0.85,
-        'disk_critical_threshold': 0.95,
-        'endpoint_failed_major_threshold': 0.5,
     },
 }, grain='os_family', merge=salt['pillar.get']('nova:monitoring')) %}
 
diff --git a/nova/meta/prometheus.yml b/nova/meta/prometheus.yml
index 001a9ea..f3e12ee 100644
--- a/nova/meta/prometheus.yml
+++ b/nova/meta/prometheus.yml
@@ -1,11 +1,10 @@
-{% from "nova/map.jinja" import controller, compute, monitoring with context %}
+{% from "nova/map.jinja" import controller, compute with context %}
 
 {%- set is_controller = controller.get('enabled', False) %}
 {%- set is_compute = compute.get('enabled', False) %}
 
 {%- if is_controller or is_compute %}
-{%- if is_compute and
-       exporters is defined %}
+{%- if is_compute and exporters is defined and compute.get('compute_driver', 'libvirt.LibvirtDriver') == 'libvirt.LibvirtDriver' %}
 {%- set packages = exporters.get('libvirt', {}).get('packages', ('libvirt-exporter', )) %}
   {%- load_yaml as new_exporters_cfg %}
 exporters:
@@ -30,11 +29,6 @@
 server:
   alert:
 {%- if is_controller %}
-{%- set minor_threshold = monitoring.services_failed_warning_threshold_percent|float %}
-{%- set major_threshold = monitoring.services_failed_critical_threshold_percent|float %}
-{%- set minor_compute_threshold = monitoring.computes_failed_warning_threshold_percent|float %}
-{%- set major_compute_threshold = monitoring.computes_failed_critical_threshold_percent|float %}
-{%- set major_endpoint_threshold = monitoring.endpoint_failed_major_threshold|float %}
 {% raw %}
     NovaApiOutage:
       if: >-
@@ -67,18 +61,17 @@
         summary: "nova-api endpoint is not accessible"
         description: >-
           The nova-api endpoint on the {{ $labels.host }} node is not accessible for 2 minutes.
-{%- endraw %}
     NovaApiEndpointsDownMajor:
       if: >-
-        count(http_response_status{name=~"nova-api"} == 0) >= count(http_response_status{name=~"nova-api"}) * {{ major_endpoint_threshold }}
+        count(http_response_status{name=~"nova-api"} == 0) >= count(http_response_status{name=~"nova-api"}) * 0.6
       for: 2m
       labels:
         severity: major
         service: nova
       annotations:
-        summary: "{{major_endpoint_threshold * 100}}% of nova-api endpoints are not accessible"
+        summary: "60% of nova-api endpoints are not accessible"
         description: >-
-          {% raw %}{{ $value }} nova-api endpoints (>= {% endraw %} {{major_endpoint_threshold * 100}}{% raw %}%) are not accessible for 2 minutes.
+          More than 60% of nova-api endpoints are not accessible for 2 minutes.
     NovaApiEndpointsOutage:
       if: >-
         count(http_response_status{name=~"nova-api"} == 0) == count(http_response_status{name=~"nova-api"})
@@ -100,47 +93,46 @@
         summary: "{{ $labels.binary }} service is down"
         description: >-
           The {{ $labels.binary }} service on the {{ $labels.hostname }} node is down.
-{%- endraw %}
     NovaServicesDownMinor:
       if: >-
-        count(openstack_nova_service_state{binary!~"nova-compute"} == 0) by (binary) >= on (binary) count(openstack_nova_service_state{binary!~"nova-compute"}) by (binary) * {{minor_threshold}}
+        count(openstack_nova_service_state{binary!~"nova-compute"} == 0) by (binary) >= on (binary) count(openstack_nova_service_state{binary!~"nova-compute"}) by (binary) * 0.3
       labels:
         severity: minor
         service: nova
       annotations:
-        summary: "{{minor_threshold * 100}}%{%- raw %} of {{ $labels.binary }} services are down"
+        summary: "30% of {{ $labels.binary }} services are down"
         description: >-
-          {{ $value }} {{ $labels.binary }} services (>= {%- endraw %} {{minor_threshold * 100}}%) are down.
+          More than 30% {{ $labels.binary }} services are down.
     NovaComputeServicesDownMinor:
       if: >-
-        count(openstack_nova_service_state{binary="nova-compute"} == 0) >= count(openstack_nova_service_state{binary="nova-compute"}) * {{minor_compute_threshold}}
+        count(openstack_nova_service_state{binary="nova-compute"} == 0) >= count(openstack_nova_service_state{binary="nova-compute"}) * 0.25
       labels:
         severity: minor
         service: nova
       annotations:
-        summary: "{{minor_compute_threshold * 100}}%{%- raw %} of nova-compute services are down"
+        summary: "More than 25% of nova-compute services are down"
         description: >-
-          {{ $value }} nova-compute services (>= {%- endraw %} {{minor_compute_threshold * 100}}%) are down.
+          More than 25% of nova-compute services are down.
     NovaServicesDownMajor:
       if: >-
-        count(openstack_nova_service_state{binary!~"nova-compute"} == 0) by (binary) >= on (binary) count(openstack_nova_service_state{binary!~"nova-compute"}) by (binary) * {{major_threshold}}
+        count(openstack_nova_service_state{binary!~"nova-compute"} == 0) by (binary) >= on (binary) count(openstack_nova_service_state{binary!~"nova-compute"}) by (binary) * 0.6
       labels:
         severity: major
         service: nova
       annotations:
-        summary: "{{major_threshold * 100}}%{%- raw %} of {{ $labels.binary }} services are down"
+        summary: "More than 60% of {{ $labels.binary }} services are down"
         description: >-
-          {{ $value }} {{ $labels.binary }} services (>= {%- endraw %} {{major_threshold * 100}}%) are down.
+          More than 60% of {{ $labels.binary }} services are down.
     NovaComputeServicesDownMajor:
       if: >-
-        count(openstack_nova_service_state{binary="nova-compute"} == 0) >= count(openstack_nova_service_state{binary="nova-compute"}) * {{major_compute_threshold}}
+        count(openstack_nova_service_state{binary="nova-compute"} == 0) >= count(openstack_nova_service_state{binary="nova-compute"}) * 0.5
       labels:
         severity: major
         service: nova
       annotations:
-        summary: "{{major_compute_threshold * 100}}%{%- raw %} of nova-compute services are down"
+        summary: "More than 50% of nova-compute services are down"
         description: >-
-          {{ $value }} nova-compute services (>= {%- endraw %} {{major_compute_threshold * 100}}{%- raw %}%) are down.
+          More than 50% of nova-compute services are down.
     NovaServiceOutage:
       if: >-
         count(openstack_nova_service_state == 0) by (binary) == on (binary) count(openstack_nova_service_state) by (binary)
@@ -152,170 +144,19 @@
         description: >-
           All {{ $labels.binary }} services are down.
 {%- endraw %}
-{%- set cpu_minor_threshold = monitoring.cpu_minor_threshold|float %}
-{%- set cpu_major_threshold = monitoring.cpu_major_threshold|float %}
-{%- set ram_major_threshold = monitoring.ram_major_threshold|float %}
-{%- set ram_critical_threshold = monitoring.ram_critical_threshold|float %}
-{%- set disk_major_threshold = monitoring.disk_major_threshold|float %}
-{%- set disk_critical_threshold = monitoring.disk_critical_threshold|float %}
-    NovaHypervisorVCPUsFullMinor:
-      if: >-
-        label_replace(system_load15, "hostname", "$1", "host", "(.*)") > on (hostname) openstack_nova_vcpus * {{ cpu_minor_threshold }}
-      labels:
-        severity: minor
-        service: nova
-      annotations:
-        summary: "{{ cpu_minor_threshold * 100 }}% of hypervisor VCPUs are used"
-        description: "{% raw %}{{ $value }} VCPUs on the {{ $labels.hostname }} node (> {% endraw %} {{ cpu_minor_threshold * 100 }}%) are used."
-    NovaHypervisorVCPUsFullMajor:
-      if: >-
-        label_replace(system_load15, "hostname", "$1", "host", "(.*)") > on (hostname) openstack_nova_vcpus * {{ cpu_major_threshold }}
-      labels:
-        severity: major
-        service: nova
-      annotations:
-        summary: "{{ cpu_major_threshold * 100 }}% of hypervisor VCPUs are used"
-        description: "{% raw %}{{ $value }} VCPUs on the {{ $labels.hostname }} node (> {% endraw %} {{ cpu_major_threshold * 100 }}%) are used."
-    NovaHypervisorMemoryFullMajor:
-      if: >-
-        openstack_nova_used_ram > openstack_nova_ram * {{ ram_major_threshold }}
-      labels:
-        severity: major
-        service: nova
-      annotations:
-        summary: "{{ ram_major_threshold * 100 }}% of hypervisor RAM is used"
-        description: "{% raw %}{{ $value }}MB of RAM on the {{ $labels.hostname }} node (> {% endraw %} {{ ram_major_threshold * 100 }}%) is used."
-    NovaHypervisorMemoryFullCritical:
-      if: >-
-        openstack_nova_used_ram > openstack_nova_ram * {{ ram_critical_threshold }}
-      labels:
-        severity: critical
-        service: nova
-      annotations:
-        summary: "{{ ram_critical_threshold * 100 }}% of hypervisor RAM is used"
-        description: "{% raw %}{{ $value }}MB of RAM on the {{ $labels.hostname }} node (> {% endraw %} {{ ram_critical_threshold * 100 }}%) is used."
-    NovaHypervisorDiskFullMajor:
-      if: >-
-        openstack_nova_used_disk > openstack_nova_disk * {{ disk_major_threshold }}
-      labels:
-        severity: major
-        service: nova
-      annotations:
-        summary: "{{ disk_major_threshold * 100 }}% of hypervisor disk space is used"
-        description: "{% raw %}{{ $value }}GB of disk space on the {{ $labels.hostname }} node (> {% endraw %} {{ disk_major_threshold * 100 }}%) is used."
-    NovaHypervisorDiskFullCritical:
-      if: >-
-        openstack_nova_used_disk > openstack_nova_disk * {{ disk_critical_threshold }}
-      labels:
-        severity: critical
-        service: nova
-      annotations:
-        summary: "{{ disk_critical_threshold * 100 }}% of hypervisor disk space is used"
-        description: "{% raw %}{{ $value }}GB of disk space on the {{ $labels.hostname }} node (> {% endraw %} {{ disk_critical_threshold * 100 }}%) is used."
-    NovaAggregateMemoryFullMajor:
-      if: >-
-        openstack_nova_aggregate_used_ram > openstack_nova_aggregate_ram * {{ ram_major_threshold }}
-      labels:
-        severity: major
-        service: nova
-      annotations:
-        summary: "{{ ram_major_threshold * 100 }}% of aggregate RAM is used"
-        description: "{% raw %}{{ $value }}MB of RAM on the {{ $labels.aggregate }} aggregate (> {% endraw %} {{ ram_major_threshold * 100 }}%) is used."
-    NovaAggregateMemoryFullCritical:
-      if: >-
-        openstack_nova_aggregate_used_ram > openstack_nova_aggregate_ram * {{ ram_critical_threshold }}
-      labels:
-        severity: critical
-        service: nova
-      annotations:
-        summary: "{{ ram_critical_threshold * 100 }}% of aggregate RAM is used"
-        description: "{% raw %}{{ $value }}MB of RAM on the {{ $labels.aggregate }} aggregate (> {% endraw %} {{ ram_critical_threshold * 100 }}%) is used."
-    NovaAggregateDiskFullMajor:
-      if: >-
-        openstack_nova_aggregate_used_disk > openstack_nova_aggregate_disk * {{ disk_major_threshold }}
-      labels:
-        severity: major
-        service: nova
-      annotations:
-        summary: "{{ disk_major_threshold * 100 }}% of aggregate disk space is used"
-        description: "{% raw %}{{ $value }}GB of disk space on the {{ $labels.aggregate }} aggregate (> {% endraw %} {{ disk_major_threshold * 100 }}%) is used."
-    NovaAggregateDiskFullCritical:
-      if: >-
-        openstack_nova_aggregate_used_disk > openstack_nova_aggregate_disk * {{ disk_critical_threshold }}
-      labels:
-        severity: critical
-        service: nova
-      annotations:
-        summary: "{{ disk_critical_threshold * 100 }}% of aggregate disk space is used"
-        description: "{% raw %}{{ $value }}GB of disk space on the {{ $labels.aggregate }} aggregate (> {% endraw %} {{ disk_critical_threshold * 100 }}%) is used."
-    NovaTotalVCPUsFullMinor:
-      if: >-
-        sum(label_replace(system_load15, "hostname", "$1", "host", "(.*)") and on (hostname) openstack_nova_vcpus) > max(sum(openstack_nova_vcpus) by (instance)) * {{ cpu_minor_threshold }}
-      labels:
-        severity: minor
-        service: nova
-      annotations:
-        summary: "{{ cpu_minor_threshold * 100 }}% of cloud VCPUs are used"
-        description: "{% raw %}{{ $value }} VCPUs in the cloud (> {% endraw %} {{ cpu_minor_threshold * 100 }}%) are used."
-    NovaTotalVCPUsFullMajor:
-      if: >-
-        sum(label_replace(system_load15, "hostname", "$1", "host", "(.*)") and on (hostname) openstack_nova_vcpus) > max(sum(openstack_nova_vcpus) by (instance)) * {{ cpu_major_threshold }}
-      labels:
-        severity: major
-        service: nova
-      annotations:
-        summary: "{{ cpu_major_threshold * 100 }}% of cloud VCPUs are used"
-        description: "{% raw %}{{ $value }} VCPUs in the cloud (> {% endraw %} {{ cpu_major_threshold * 100 }}%) are used."
-    NovaTotalMemoryFullMajor:
-      if: >-
-        openstack_nova_total_used_ram > openstack_nova_total_ram * {{ ram_major_threshold }}
-      labels:
-        severity: major
-        service: nova
-      annotations:
-        summary: "{{ ram_major_threshold * 100 }}% of cloud RAM is used"
-        description: "{% raw %}{{ $value }}MB of RAM in the cloud (> {% endraw %} {{ ram_major_threshold * 100 }}%) is used."
-    NovaTotalMemoryFullCritical:
-      if: >-
-        openstack_nova_total_used_ram > openstack_nova_total_ram * {{ ram_critical_threshold }}
-      labels:
-        severity: critical
-        service: nova
-      annotations:
-        summary: "{{ ram_critical_threshold * 100 }}% of cloud RAM is used"
-        description: "{% raw %}{{ $value }}MB of RAM in the cloud (> {% endraw %} {{ ram_critical_threshold * 100 }}%) is used."
-    NovaTotalDiskFullMajor:
-      if: >-
-        openstack_nova_total_used_disk > openstack_nova_total_disk * {{ disk_major_threshold }}
-      labels:
-        severity: major
-        service: nova
-      annotations:
-        summary: "{{ disk_major_threshold * 100 }}% of cloud disk space is used"
-        description: "{% raw %}{{ $value }}GB of disk space in the cloud (> {% endraw %} {{ disk_major_threshold * 100 }}%) is used."
-    NovaTotalDiskFullCritical:
-      if: >-
-        openstack_nova_total_used_disk > openstack_nova_total_disk * {{ disk_critical_threshold }}
-      labels:
-        severity: critical
-        service: nova
-      annotations:
-        summary: "{{ disk_critical_threshold * 100 }}% of cloud disk space is used"
-        description: "{% raw %}{{ $value }}GB of disk space in the cloud (> {% endraw %} {{ disk_critical_threshold * 100 }}%) is used."
 {%- endif %}
-    NovaErrorLogsTooHigh:
-      {%- set log_threshold = monitoring.error_log_rate.warn|float %}
-      if: >-
-        sum(rate(log_messages{service="nova",level=~"(?i:(error|emergency|fatal))"}[5m])) without (level) > {{ log_threshold }}
 {%- raw %}
+    NovaErrorLogsTooHigh:
+      if: >-
+        sum(rate(log_messages{service="nova",level=~"(?i:(error|emergency|fatal))"}[5m])) without (level) > 0.2
       labels:
         severity: warning
         service: nova
       annotations:
         summary: "High number of errors in Nova logs"
-        description: "The average per-second rate of errors in Nova logs on the {{ $labels.host }} node is {{ $value }} (as measured over the last 5 minutes)."
+        description: "The average rate of errors in Nova logs on the {{ $labels.host }} node is more than 0.2 error messages per second (as measured over the last 5 minutes)."
 {%- endraw %}
-{%- if is_compute and exporters is defined %}
+{%- if is_compute and exporters is defined and compute.get('compute_driver', 'libvirt.LibvirtDriver') == 'libvirt.LibvirtDriver'%}
 {%- raw %}
     LibvirtDown:
       if: >-
diff --git a/nova/upgrade/pre/init.sls b/nova/upgrade/pre/init.sls
index 9ed049a..0c5834e 100644
--- a/nova/upgrade/pre/init.sls
+++ b/nova/upgrade/pre/init.sls
@@ -16,7 +16,7 @@
 /etc/nova/nova.conf:
   file.managed:
   - name: /etc/nova/nova.conf
-  - source: salt://nova/files/{{ _data.version }}/nova-{{ type }}.conf.{{ grains.os_family }}
+  - source: salt://nova/files/{{ upgrade.old_release }}/nova-{{ type }}.conf.{{ grains.os_family }}
   - template: jinja
 
 {%- if controller.get('enabled') %}
diff --git a/tests/pillar/compute_cluster.sls b/tests/pillar/compute_cluster.sls
index 4988c0b..e6124f2 100644
--- a/tests/pillar/compute_cluster.sls
+++ b/tests/pillar/compute_cluster.sls
@@ -13,6 +13,9 @@
     vnc_keymap: en-gb
     resume_guests_state_on_host_boot: True
     preallocate_images: space
+    cpu_allocation_ratio: 16.0
+    ram_allocation_ratio: 1.5
+    disk_allocation_ratio: 1.0
     bind:
       vnc_address: 127.0.0.1
       vnc_port: 6080
diff --git a/tests/pillar/compute_single.sls b/tests/pillar/compute_single.sls
index c2b740a..99e4aff 100644
--- a/tests/pillar/compute_single.sls
+++ b/tests/pillar/compute_single.sls
@@ -8,6 +8,9 @@
     resume_guests_state_on_host_boot: False
     preallocate_images: space
     cpu_mode: custom
+    cpu_allocation_ratio: 16.0
+    ram_allocation_ratio: 1.5
+    disk_allocation_ratio: 1.0
     libvirt:
       cpu_model: IvyBridge
     bind: