It was already on. I followed the instructions on the ticket, so here it is:
==> /var/log/sssd/sssd_cluster.iq.ufrj.br.log <==
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [sbus_dispatch] (0x4000): dbus conn: 0x55b328b4ac90
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [sbus_dispatch] (0x4000): Dispatching.
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [sbus_message_handler] (0x2000): Received SBUS method org.freedesktop.sssd.dataprovider.hostHandler on path /org/freedesktop/sssd/dataprovider
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [sbus_get_sender_id_send] (0x2000): Not a sysbus message, quit
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [dp_attach_req] (0x0400): DP Request [HostID #9]: New request. Flags [0000].
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [dp_attach_req] (0x0400): Number of active DP request: 1
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [sdap_id_op_connect_step] (0x4000): reusing cached connection
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [sdap_print_server] (0x2000): Searching 172.26.255.254:389
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [sdap_get_generic_ext_step] (0x0400): calling ldap_search_ext with [(&(objectClass=ipaHost)(fqdn=hpclab01))][cn=accounts,dc=cluster,dc=iq,dc=ufrj,dc=br].
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [sdap_get_generic_ext_step] (0x1000): Requesting attrs: [objectClass]
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [sdap_get_generic_ext_step] (0x1000): Requesting attrs: [cn]
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [sdap_get_generic_ext_step] (0x1000): Requesting attrs: [fqdn]
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [sdap_get_generic_ext_step] (0x1000): Requesting attrs: [serverHostname]
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [sdap_get_generic_ext_step] (0x1000): Requesting attrs: [memberOf]
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [sdap_get_generic_ext_step] (0x1000): Requesting attrs: [ipaSshPubKey]
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [sdap_get_generic_ext_step] (0x1000): Requesting attrs: [ipaUniqueID]
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [sdap_get_generic_ext_step] (0x2000): ldap_search_ext called, msgid = 27
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [sdap_op_add] (0x2000): New operation 27 timeout 60
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [sdap_process_result] (0x2000): Trace: sh[0x55b328b3bf20], connected[1], ops[0x55b328b26700], ldap[0x55b328b2d830]
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [sdap_process_message] (0x4000): Message type: [LDAP_RES_SEARCH_RESULT]
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [sdap_get_generic_op_finished] (0x0400): Search result: Success(0), no errmsg set
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [sdap_get_generic_op_finished] (0x2000): Total count [0]
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [sdap_op_destructor] (0x2000): Operation 27 finished
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [sdap_id_op_done] (0x4000): releasing operation connection
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [hosts_get_done] (0x0040): No host with name [hpclab01] found.
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [sysdb_delete_ssh_host] (0x0400): Deleting host hpclab01
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [ldb] (0x4000): start ldb transaction (nesting: 0)
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [ldb] (0x4000): Added timed event "ltdb_callback": 0x55b328b6c3f0
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [ldb] (0x4000): Added timed event "ltdb_timeout": 0x55b328b6c4b0
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [ldb] (0x4000): Running timer event 0x55b328b6c3f0 "ltdb_callback"
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [ldb] (0x4000): Destroying timer event 0x55b328b6c4b0 "ltdb_timeout"
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [ldb] (0x4000): Ending timer event 0x55b328b6c3f0 "ltdb_callback"
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [ldb] (0x4000): cancel ldb transaction (nesting: 0)
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [dp_req_done] (0x0400): DP Request [HostID #9]: Request handler finished [0]: Success
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [_dp_req_recv] (0x0400): DP Request [HostID #9]: Receiving request data.
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [dp_req_reply_list_success] (0x0400): DP Request [HostID #9]: Finished. Success.
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [dp_req_reply_std] (0x1000): DP Request [HostID #9]: Returning [Internal Error]: 3,22,Invalid argument
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [dp_req_destructor] (0x0400): DP Request [HostID #9]: Request removed.
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [dp_req_destructor] (0x0400): Number of active DP request: 0
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [sdap_process_result] (0x2000): Trace: sh[0x55b328b3bf20], connected[1], ops[(nil)], ldap[0x55b328b2d830]
(Tue Oct 8 21:10:45 2019) [sssd[be[
cluster.iq.ufrj.br]]] [sdap_process_result] (0x2000): Trace: end of ldap_result list