Add configuration option 'hardware-enablement-options'

This new config option allows operators to pass custom configuration
options to the ironic-conductor service.

Usage example:

    cat << EOF > ./config.txt
    [DEFAULT]
    enabled_hardware_types = intel-ipmi, ipmi, idrac
    enabled_power_interfaces = ipmitool, idrac-wsman
    EOF
    juju config ironic-conductor \
        hardware-enablement-options=@./config.txt

Closes-Bug: #2002151
Change-Id: I3e2ca81b272e61e4069d80b52902b243a5f0ba19

src/config.yaml

@@ -220,3 +220,9 @@ options:
       for. Defaults to 20 minutes. If some deploys get a 401 response code
       when trying to download from the temporary URL, try raising this
       duration.
+  hardware-enablement-options:
+    default:
+    type: string
+    description: |
+      Options passed to the managed service to set configuration keys that
+      enable the use of specific hardware.

src/lib/charm/openstack/ironic/ironic.py

@@ -15,10 +15,13 @@ from charmhelpers.contrib.openstack.utils import (
     CompareOpenStackReleases,
     os_release,
 )
+from charmhelpers.contrib.openstack import templating
+from charmhelpers.core import host
 
 import charm.openstack.ironic.controller_utils as controller_utils
 import charms_openstack.adapters as adapters
 import charmhelpers.contrib.network.ip as ch_ip
+import charmhelpers.contrib.openstack.utils as ch_utils
 import charms.leadership as leadership
 import charms.reactive as reactive
 
@@ -41,6 +44,10 @@ PACKAGES = [
 
 IRONIC_DIR = "/etc/ironic/"
 IRONIC_CONF = os.path.join(IRONIC_DIR, "ironic.conf")
+IRONIC_CONF_D = os.path.join(IRONIC_DIR, "conf.d")
+IRONIC_CONF_HW_ENABLEMENT = os.path.join(IRONIC_CONF_D,
+                                         "90-hardware-enablement.conf")
+IRONIC_DEFAULT = "/etc/default/ironic-conductor"
 ROOTWRAP_CONF = os.path.join(IRONIC_DIR, "rootwrap.conf")
 FILTERS_DIR = os.path.join(IRONIC_DIR, "rootwrap.d")
 IRONIC_LIB_FILTERS = os.path.join(
@@ -198,6 +205,8 @@ class IronicConductorCharm(charms_openstack.charm.OpenStackCharm):
 
     restart_map = {
         IRONIC_CONF: ['ironic-conductor', ],
+        IRONIC_DEFAULT: ['ironic-conductor', ],
+        IRONIC_CONF_HW_ENABLEMENT: ['ironic-conductor', ],
         IRONIC_UTILS_FILTERS: ['ironic-conductor', ],
         IRONIC_LIB_FILTERS: ['ironic-conductor', ],
         ROOTWRAP_CONF: ['ironic-conductor', ],
@@ -317,6 +326,7 @@ class IronicConductorCharm(charms_openstack.charm.OpenStackCharm):
     def install(self):
         self.configure_source()
         super().install()
+        self._reconfigure_ironic_conductor()
         self.pxe_config._copy_resources()
         self.assess_status()
 
@@ -443,6 +453,32 @@ class IronicConductorCharm(charms_openstack.charm.OpenStackCharm):
 
         return (None, None)
 
+    def upgrade_charm(self):
+        """Custom upgrade charm.
+
+        Side effects:
+        - Create /etc/ironic/conf.d/ directory.
+        - Reconfigure ironic-conductor service to use the previously created
+          directory.
+        """
+        self._reconfigure_ironic_conductor()
+        super().upgrade_charm()
+
+    def _reconfigure_ironic_conductor(self):
+        """Reconfigure ironic-conductor daemon.
+
+        Set /etc/default/ironic-conductor to pass --config-dir in DAEMON_ARGS.
+        """
+        if not os.path.isdir(IRONIC_CONF_D):
+            host.mkdir(IRONIC_CONF_D)
+
+        # reconfigure ironic-conductor to run it with --conf-dir
+        release = ch_utils.os_release('ironic-common')
+        configs = templating.OSConfigRenderer(templates_dir='templates/',
+                                              openstack_release=release)
+        configs.register(config_file=IRONIC_DEFAULT, contexts=[])
+        configs.write_all()
+
 
 class IronicConductorXenaCharm(IronicConductorCharm):
 

src/templates/90-hardware-enablement.conf

@@ -0,0 +1,7 @@
+###############################################################################
+# [ WARNING ]
+# Configuration file maintained by Juju. Local changes may be overwritten.
+###############################################################################
+{%- if options.hardware_enablement_options %}
+{{ options.hardware_enablement_options }}
+{%- endif %}

src/templates/etc_default_ironic-conductor

@@ -0,0 +1,5 @@
+###############################################################################
+# [ WARNING ]
+# Configuration file maintained by Juju. Local changes may be overwritten.
+###############################################################################
+DAEMON_ARGS="--config-dir=/etc/ironic/conf.d/"

src/tests/bundles/jammy-yoga.yaml

@@ -290,6 +290,9 @@ services:
       disable-secure-erase: true
       use-ipxe: true
       enabled-network-interfaces: "flat, noop"
+      hardware-enablement-options: |
+        [ipmi]
+        debug = true
   neutron-ironic-agent:
     charm: ch:neutron-api-plugin-ironic
     num_units: 0

src/tests/bundles/jammy-zed.yaml

@@ -290,6 +290,9 @@ services:
       disable-secure-erase: true
       use-ipxe: true
       enabled-network-interfaces: "flat, noop"
+      hardware-enablement-options: |
+        [ipmi]
+        debug = true
   neutron-ironic-agent:
     charm: ch:neutron-api-plugin-ironic
     num_units: 0

src/tests/bundles/kinetic-zed.yaml

@@ -290,6 +290,9 @@ services:
       disable-secure-erase: true
       use-ipxe: true
       enabled-network-interfaces: "flat, noop"
+      hardware-enablement-options: |
+        [ipmi]
+        debug = true
   neutron-ironic-agent:
     charm: ch:neutron-api-plugin-ironic
     num_units: 0

unit_tests/test_lib_charm_openstack_ironic.py

@@ -12,9 +12,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import mock
 from copy import deepcopy
+from unittest import mock
 
+import charms_openstack.test_mocks
 import charms_openstack.test_utils as test_utils
 import charms.leadership as leadership
 import charmhelpers.core.hookenv as hookenv
@@ -522,3 +523,48 @@ class TestIronicCharm(test_utils.PatchHelper):
             ' (bogus) is not enabled in enabled-deploy-interfaces: direct, '
             'iscsi')
         self.assertEqual(target.custom_assess_status_check(), expected_status)
+
+    @mock.patch('charms_openstack.charm.OpenStackCharm.upgrade_charm')
+    def test_upgrade_charm(self, upgrade_charm):
+        os_release.return_value = "ussuri"
+        cfg_data = {
+            "openstack-origin": "distro",
+        }
+        hookenv.config.return_value = cfg_data
+        target = ironic.IronicConductorCharm()
+        target.upgrade_charm()
+        # check the parent's upgrade_charm was called
+        upgrade_charm.assert_called()
+        os_module = charms_openstack.test_mocks.charmhelpers.contrib.openstack
+        templating = os_module.templating
+        templating.OSConfigRenderer.assert_called_with(
+            templates_dir='templates/', openstack_release='ussuri')
+        configs = templating.OSConfigRenderer()
+        configs.register.assert_called_with(config_file=ironic.IRONIC_DEFAULT,
+                                            contexts=[])
+        configs.write_all.assert_called_with()
+
+    @mock.patch('charms_openstack.charm.OpenStackCharm.install')
+    def test_install(self, install):
+        os_release.return_value = "ussuri"
+        cfg_data = {
+            "openstack-origin": "distro",
+        }
+        charmhelpers = charms_openstack.test_mocks.charmhelpers
+        os_utils = charmhelpers.contrib.openstack.utils
+        os_utils.get_source_and_pgp_key.return_value = (None, None)
+
+        hookenv.config.return_value = cfg_data
+
+        target = ironic.IronicConductorCharm()
+        target.install()
+        install.assert_called_with()
+        os_module = charms_openstack.test_mocks.charmhelpers.contrib.openstack
+        templating = os_module.templating
+        templating.OSConfigRenderer.assert_called_with(
+            templates_dir='templates/', openstack_release='ussuri')
+        configs = templating.OSConfigRenderer(templates_dir='templates/',
+                                              openstack_release='ussuri')
+        configs.register.assert_called_with(config_file=ironic.IRONIC_DEFAULT,
+                                            contexts=[])
+        configs.write_all.assert_called_with()