Track lightweight CAs on replica installation

Add Certmonger tracking requests for lightweight CAs on replica
installation.  As part of this change, extract most of the
lightweight CA tracking code out of ipa-certupdate and into
cainstance.

Fixes: https://fedorahosted.org/freeipa/ticket/6019
Reviewed-By: Martin Babinsky <mbabinsk@redhat.com>

ipaserver/install/cainstance.py

@@ -1383,6 +1383,9 @@ class CAInstance(DogtagInstance):
 
         self.step("enabling CA instance", self.__enable_instance)
 
+        self.step("configuring certmonger renewal for lightweight CAs",
+                  self.__add_lightweight_ca_tracking_requests)
+
         self.start_creation(runtime=210)
 
     def setup_lightweight_ca_key_retrieval(self):
@@ -1448,6 +1451,22 @@ class CAInstance(DogtagInstance):
         os.chmod(keyfile, 0o600)
         os.chown(keyfile, pent.pw_uid, pent.pw_gid)
 
+    def __add_lightweight_ca_tracking_requests(self):
+        if not self.admin_conn:
+            self.ldap_connect()
+
+        try:
+            lwcas = self.admin_conn.get_entries(
+                base_dn=api.env.basedn,
+                filter='(objectclass=ipaca)',
+                attrs_list=['cn', 'ipacaid'],
+            )
+            add_lightweight_ca_tracking_requests(self.log, lwcas)
+        except errors.NotFound:
+            # shouldn't happen, but don't fail if it does
+            root_logger.warning(
+                "Did not find any lightweight CAs; nothing to track")
+
 
 def replica_ca_install_check(config):
     if not config.setup_ca:
@@ -2070,6 +2089,53 @@ def ensure_default_caacl():
         api.Backend.ldap2.disconnect()
 
 
+def add_lightweight_ca_tracking_requests(logger, lwcas):
+    """Add tracking requests for the given lightweight CAs.
+
+    The entries must have the 'cn' and 'ipacaid' attributes.
+
+    The IPA CA, if present, is skipped.
+
+    """
+    for entry in lwcas:
+        if ipalib.constants.IPA_CA_CN in entry['cn']:
+            continue
+
+        nickname = "{} {}".format(
+                ipalib.constants.IPA_CA_NICKNAME,
+                entry['ipacaid'][0])
+        criteria = {
+            'cert-database': paths.PKI_TOMCAT_ALIAS_DIR,
+            'cert-nickname': nickname,
+            'ca-name': ipalib.constants.RENEWAL_CA_NAME,
+        }
+        request_id = certmonger.get_request_id(criteria)
+        if request_id is None:
+            try:
+                certmonger.dogtag_start_tracking(
+                    secdir=paths.PKI_TOMCAT_ALIAS_DIR,
+                    pin=certmonger.get_pin('internal'),
+                    pinfile=None,
+                    nickname=nickname,
+                    ca=ipalib.constants.RENEWAL_CA_NAME,
+                    pre_command='stop_pkicad',
+                    post_command='renew_ca_cert "%s"' % nickname,
+                )
+                request_id = certmonger.get_request_id(criteria)
+                certmonger.modify(request_id, profile='ipaCACertRenewal')
+                logger.debug(
+                    'Lightweight CA renewal: '
+                    'added tracking request for "%s"', nickname)
+            except RuntimeError as e:
+                logger.error(
+                    'Lightweight CA renewal: Certmonger failed to '
+                    'start tracking certificate: %s', e)
+        else:
+            logger.debug(
+                'Lightweight CA renewal: '
+                'already tracking certificate "%s"', nickname)
+
+
 def update_ipa_conf():
     """
     Update IPA configuration file to ensure that RA plugins are enabled and