aci: add IPA servers host group 'ipaservers'

https://fedorahosted.org/freeipa/ticket/3416

Reviewed-By: Martin Basti <mbasti@redhat.com>
Reviewed-By: Simo Sorce <ssorce@redhat.com>

ACI.txt

@@ -119,7 +119,7 @@ aci: (targetattr = "usercertificate")(targetfilter = "(objectclass=ipahost)")(ve
 dn: cn=computers,cn=accounts,dc=ipa,dc=example
 aci: (targetattr = "userpassword")(targetfilter = "(objectclass=ipahost)")(version 3.0;acl "permission:System: Manage Host Enrollment Password";allow (write) groupdn = "ldap:///cn=System: Manage Host Enrollment Password,cn=permissions,cn=pbac,dc=ipa,dc=example";)
 dn: cn=computers,cn=accounts,dc=ipa,dc=example
-aci: (targetattr = "krblastpwdchange || krbprincipalkey")(targetfilter = "(objectclass=ipahost)")(version 3.0;acl "permission:System: Manage Host Keytab";allow (write) groupdn = "ldap:///cn=System: Manage Host Keytab,cn=permissions,cn=pbac,dc=ipa,dc=example";)
+aci: (targetattr = "krblastpwdchange || krbprincipalkey")(targetfilter = "(&(!(memberOf=cn=ipaservers,cn=hostgroups,cn=accounts,dc=ipa,dc=example))(objectclass=ipahost))")(version 3.0;acl "permission:System: Manage Host Keytab";allow (write) groupdn = "ldap:///cn=System: Manage Host Keytab,cn=permissions,cn=pbac,dc=ipa,dc=example";)
 dn: cn=computers,cn=accounts,dc=ipa,dc=example
 aci: (targetattr = "createtimestamp || entryusn || ipaallowedtoperform;read_keys || ipaallowedtoperform;write_keys || modifytimestamp || objectclass")(targetfilter = "(objectclass=ipahost)")(version 3.0;acl "permission:System: Manage Host Keytab Permissions";allow (compare,read,search,write) groupdn = "ldap:///cn=System: Manage Host Keytab Permissions,cn=permissions,cn=pbac,dc=ipa,dc=example";)
 dn: cn=computers,cn=accounts,dc=ipa,dc=example
@@ -137,7 +137,7 @@ aci: (targetfilter = "(objectclass=ipahost)")(version 3.0;acl "permission:System
 dn: cn=hostgroups,cn=accounts,dc=ipa,dc=example
 aci: (targetfilter = "(objectclass=ipahostgroup)")(version 3.0;acl "permission:System: Add Hostgroups";allow (add) groupdn = "ldap:///cn=System: Add Hostgroups,cn=permissions,cn=pbac,dc=ipa,dc=example";)
 dn: cn=hostgroups,cn=accounts,dc=ipa,dc=example
-aci: (targetattr = "member")(targetfilter = "(objectclass=ipahostgroup)")(version 3.0;acl "permission:System: Modify Hostgroup Membership";allow (write) groupdn = "ldap:///cn=System: Modify Hostgroup Membership,cn=permissions,cn=pbac,dc=ipa,dc=example";)
+aci: (targetattr = "member")(targetfilter = "(&(!(cn=ipaservers))(objectclass=ipahostgroup))")(version 3.0;acl "permission:System: Modify Hostgroup Membership";allow (write) groupdn = "ldap:///cn=System: Modify Hostgroup Membership,cn=permissions,cn=pbac,dc=ipa,dc=example";)
 dn: cn=hostgroups,cn=accounts,dc=ipa,dc=example
 aci: (targetattr = "cn || description")(targetfilter = "(objectclass=ipahostgroup)")(version 3.0;acl "permission:System: Modify Hostgroups";allow (write) groupdn = "ldap:///cn=System: Modify Hostgroups,cn=permissions,cn=pbac,dc=ipa,dc=example";)
 dn: cn=hostgroups,cn=accounts,dc=ipa,dc=example

install/share/bootstrap-template.ldif

@@ -261,6 +261,17 @@ description: Limited admins who can edit other users
 cn: editors
 ipaUniqueID: autogenerate
 
+dn: cn=ipaservers,cn=hostgroups,cn=accounts,$SUFFIX
+changetype: add
+objectClass: top
+objectClass: groupOfNames
+objectClass: nestedGroup
+objectClass: ipaobject
+objectClass: ipahostgroup
+description: IPA server hosts
+cn: ipaservers
+ipaUniqueID: autogenerate
+
 dn: cn=sshd,cn=hbacservices,cn=hbac,$SUFFIX
 changetype: add
 objectclass: ipahbacservice

install/updates/20-ipaservers_hostgroup.update

@@ -0,0 +1,13 @@
+dn: cn=ipaservers,cn=hostgroups,cn=accounts,$SUFFIX
+default: objectClass: top
+default: objectClass: groupOfNames
+default: objectClass: nestedGroup
+default: objectClass: ipaobject
+default: objectClass: ipahostgroup
+default: description: IPA server hosts
+default: cn: ipaservers
+default: ipaUniqueID: autogenerate
+
+# Add local host to ipaservers
+dn: cn=ipaservers,cn=hostgroups,cn=accounts,$SUFFIX
+add: member: fqdn=$FQDN,cn=computers,cn=accounts,$SUFFIX

install/updates/Makefile.am

@@ -14,6 +14,7 @@ app_DATA =				\
 	20-dna.update			\
 	20-host_nis_groups.update	\
 	20-indices.update		\
+	20-ipaservers_hostgroup.update	\
 	20-nss_ldap.update		\
 	20-replication.update		\
 	20-sslciphers.update		\

ipalib/plugins/host.py

@@ -395,6 +395,12 @@ class host(LDAPObject):
         },
         'System: Manage Host Keytab': {
             'ipapermright': {'write'},
+            'ipapermtargetfilter': [
+                '(objectclass=ipahost)',
+                '(!(memberOf=%s))' % DN('cn=ipaservers',
+                                        api.env.container_hostgroup,
+                                        api.env.basedn),
+            ],
             'ipapermdefaultattr': {'krblastpwdchange', 'krbprincipalkey'},
             'replaces': [
                 '(targetattr = "krbprincipalkey || krblastpwdchange")(target = "ldap:///fqdn=*,cn=computers,cn=accounts,$SUFFIX")(version 3.0;acl "permission:Manage host keytab";allow (write) groupdn = "ldap:///cn=Manage host keytab,cn=permissions,cn=pbac,$SUFFIX";)',

ipalib/plugins/hostgroup.py

@@ -72,6 +72,8 @@ def get_complete_hostgroup_member_list(hostgroup):
 
 register = Registry()
 
+PROTECTED_HOSTGROUPS = (u'ipaservers',)
+
 
 @register()
 class hostgroup(LDAPObject):
@@ -121,6 +123,10 @@ class hostgroup(LDAPObject):
         },
         'System: Modify Hostgroup Membership': {
             'ipapermright': {'write'},
+            'ipapermtargetfilter': [
+                '(objectclass=ipahostgroup)',
+                '(!(cn=ipaservers))',
+            ],
             'ipapermdefaultattr': {'member'},
             'replaces': [
                 '(targetattr = "member")(target = "ldap:///cn=*,cn=hostgroups,cn=accounts,$SUFFIX")(version 3.0;acl "permission:Modify Hostgroup membership";allow (write) groupdn = "ldap:///cn=Modify Hostgroup membership,cn=permissions,cn=pbac,$SUFFIX";)',
@@ -229,6 +235,14 @@ class hostgroup_del(LDAPDelete):
 
     msg_summary = _('Deleted hostgroup "%(value)s"')
 
+    def pre_callback(self, ldap, dn, *keys, **options):
+        if keys[0] in PROTECTED_HOSTGROUPS:
+            raise errors.ProtectedEntryError(label=_(u'hostgroup'),
+                                             key=keys[0],
+                                             reason=_(u'privileged hostgroup'))
+
+        return dn
+
 
 @register()
 class hostgroup_mod(LDAPUpdate):
@@ -283,6 +297,18 @@ class hostgroup_add_member(LDAPAddMember):
 class hostgroup_remove_member(LDAPRemoveMember):
     __doc__ = _('Remove members from a hostgroup.')
 
+    def pre_callback(self, ldap, dn, found, not_found, *keys, **options):
+        if keys[0] in PROTECTED_HOSTGROUPS and 'host' in options:
+            result = api.Command.hostgroup_show(keys[0])
+            hosts_left = set(result['result'].get('member_host', []))
+            hosts_deleted = set(options['host'])
+            if hosts_left.issubset(hosts_deleted):
+                raise errors.LastMemberError(key=sorted(hosts_deleted)[0],
+                                             label=_(u'hostgroup'),
+                                             container=keys[0])
+
+        return dn
+
     def post_callback(self, ldap, completed, failed, dn, entry_attrs, *keys, **options):
         assert isinstance(dn, DN)
         self.obj.suppress_netgroup_memberof(ldap, dn, entry_attrs)

ipaserver/install/krbinstance.py

@@ -117,6 +117,13 @@ class KrbInstance(service.Service):
             host_entry['krbticketflags'] = service_entry['krbticketflags']
         self.admin_conn.add_entry(host_entry)
 
+        # Add the host to the ipaserver host group
+        hostgroup_dn = DN(('cn', 'ipaservers'), ('cn', 'hostgroups'),
+                          ('cn', 'accounts'), self.suffix)
+        hostgroup_entry = self.admin_conn.get_entry(hostgroup_dn, ['member'])
+        hostgroup_entry.setdefault('member', []).append(host_dn)
+        self.admin_conn.update_entry(hostgroup_entry)
+
     def __common_setup(self, realm_name, host_name, domain_name, admin_password):
         self.fqdn = host_name
         self.realm = realm_name.upper()