Enable LWCA monitor explicitly

Currently LWCA is only supported in IPA since the key
replication depends on Custodia, so LWCA is not actually
supported in regular PKI installation. However, currently
the AuthorityMonitor is enabled by default and it executes
a persistent search to monitor LWCA replication so it is
wasting resources in non-IPA environment.

To reduce unnecessary resource consumption the LWCA monitor
will be disabled by default in PKI, so IPA will need to
enable it explicitly for new and existing installations.

Reviewed-By: Florence Blanc-Renaud <flo@redhat.com>

ipaserver/install/cainstance.py

@@ -435,6 +435,8 @@ def configure_instance(self, host_name, dm_password, admin_password,
                       configure_lightweight_ca_acls)
             self.step("Ensure lightweight CAs container exists",
                       ensure_lightweight_cas_container)
+            self.step("Enable lightweight CA monitor",
+                      enable_lightweight_ca_monitor)
             self.step(
                 "Ensuring backward compatibility",
                 self.__dogtag10_migration)
@@ -1783,6 +1785,28 @@ def ensure_lightweight_cas_container():
     )
 
 
+def enable_lightweight_ca_monitor():
+
+    # Check LWCA monitor
+    value = directivesetter.get_directive(
+        paths.CA_CS_CFG_PATH,
+        'ca.authorityMonitor.enable',
+        separator='=')
+
+    if value == 'true':
+        return False  # already enabled; restart not needed
+
+    # Enable LWCA monitor
+    directivesetter.set_directive(
+        paths.CA_CS_CFG_PATH,
+        'ca.authorityMonitor.enable',
+        'true',
+        quotes=False,
+        separator='=')
+
+    return True  # restart needed
+
+
 def minimum_acme_support(data=None):
     """
     ACME with global enable/disable is required.

ipaserver/install/server/upgrade.py

@@ -482,6 +482,16 @@ def ca_ensure_lightweight_cas_container(ca):
     return cainstance.ensure_lightweight_cas_container()
 
 
+def ca_enable_lightweight_ca_monitor(ca):
+    logger.info('[Enabling LWCA monitor]')
+
+    if not ca.is_configured():
+        logger.info('CA is not configured')
+        return False
+
+    return cainstance.enable_lightweight_ca_monitor()
+
+
 def ca_add_default_ocsp_uri(ca):
     logger.info('[Adding default OCSP URI configuration]')
     if not ca.is_configured():
@@ -1904,6 +1914,7 @@ def upgrade_configuration():
         ca_configure_profiles_acl(ca),
         ca_configure_lightweight_ca_acls(ca),
         ca_ensure_lightweight_cas_container(ca),
+        ca_enable_lightweight_ca_monitor(ca),
         ca_add_default_ocsp_uri(ca),
         ca_disable_publish_cert(ca),
     ])