11:38 a.m.
Hello,
We have noticed some inconsistent results while restoring from a backup. We are running
the below script which takes backups nightly and then we use the 'bak2db' to
restore.
Version: 389-Directory/1.3.8.4 B2018.332.2046
We have noticed 2 issues:
1) Segmentation fault
The first time we execute 'bak2db' or 'bak2db.pl' both generate the below
error:
[root(a)iris-ldap-01b.lab1 bak]# bak2db
/var/lib/dirsrv/slapd-iris-ldap-01b/bak//iris-ldap-01b-2020_01_08_06_00_02 -n userRoot -Z
$(hostname -s)
[09/Jan/2020:16:59:58.470938641 +0000] - ERR - config_set - The attribute
nsslapd-accesslog-list is read only; ignoring new value
/var/log/dirsrv/slapd-iris-ldap-01b/access.20190630-191314.test
[09/Jan/2020:16:59:58.474013017 +0000] - ERR - config_set - The attribute
nsslapd-accesslog-list is read only; ignoring new value /var/log/test
[09/Jan/2020:16:59:58.666392572 +0000] - INFO - ldbm_instance_config_cachememsize_set -
force a minimal value 512000
[09/Jan/2020:16:59:58.694699743 +0000] - INFO - ldbm_instance_config_cachememsize_set -
force a minimal value 512000
[09/Jan/2020:16:59:58.727591335 +0000] - ERR - dblayer_file_check - Previous import or
restore failed, file: /var/lib/dirsrv/slapd-iris-ldap-01b/db/../.restore is empty
[09/Jan/2020:16:59:58.759491776 +0000] - INFO - dblayer_pre_close - All database threads
now stopped
[09/Jan/2020:16:59:58.763162191 +0000] - NOTICE - dblayer_delete_database_ex - Skipping
instance NetscapeRoot
/sbin/bak2db: line 87: 17865 Segmentation fault /usr/sbin/ns-slapd archive2db -D
/etc/dirsrv/slapd-iris-ldap-01b -a
/var/lib/dirsrv/slapd-iris-ldap-01b/bak/iris-ldap-01b-2020_01_08_06_00_02 -n
"userRoot"
We have noticed that stopping the server and using 'bak2db' a second time does
restore, but it has to be executed 2 times.
* Do you know why we are getting this error?
2) In some instances the restore is not successful. And this is inconsistent, sometimes it
works and others it does not. Below are the errors:
[09/Jan/2020:16:46:10.349362830 +0000] - ERR - libdb - BDB2506 file
/var/lib/dirsrv/slapd-iris-ldap-01b/changelogdb/17a67641-223b11e8-966b9f6a-c9bf4dc9_585bee1f000000020000.db
has LSN 241/3829568, past end of log at 241/2373072
[09/Jan/2020:16:46:10.351404473 +0000] - ERR - libdb - BDB2507 Commonly caused by moving
a database from one database environment
[09/Jan/2020:16:46:10.352951735 +0000] - ERR - libdb - BDB2508 to another without
clearing the database LSNs, or by removing all of
[09/Jan/2020:16:46:10.356241586 +0000] - ERR - libdb - BDB2509 the log files from a
database environment
[09/Jan/2020:16:46:10.358146068 +0000] - ERR - libdb - BDB1521 Recovery function for LSN
241 1284 failed
[09/Jan/2020:16:46:10.360388060 +0000] - ERR - libdb - BDB0061 PANIC: Invalid argument
[09/Jan/2020:16:46:10.362683721 +0000] - ERR - libdb - BDB1544 process-private: unable to
find environment
[09/Jan/2020:16:46:10.365319736 +0000] - ERR - dblayer_make_private_recovery_env - Open
error -30973: BDB0087 DB_RUNRECOVERY: Fatal error, run database recovery
[09/Jan/2020:16:46:10.366912512 +0000] - ERR - dblayer_fri_restore - Recovery failed!
[09/Jan/2020:16:46:10.368700472 +0000] - ERR - ldbm_back_archive2ldbm - Failed to read
backup file set. Either the directory specified doesn't exist, or it exists but
doesn't contain a valid backup set, or file permissions prevent the server reading the
backup set. error=-30973 (BDB0087 DB_RUNRECOVERY: Fatal error, run database recovery)
* Is there anything we need to change to make sure we have correct backups?
For backup we are running this script based on a response from the mailing list:
#!/bin/bash
#
# Creates a backup of 389-ds online
# Based on https://mjanja.ch/2013/09/backing-up-389-ldap/
#
# Read credentials from file
timestamp=`date +%Y_%m_%d_%H_%M_%S`
source /usr/local/etc/ldap-backup.cfg
# Backup each instance
for dirsrv in /etc/dirsrv/slapd-*
do
name=${dirsrv/*slapd-/}
if [ "${name}" == "localhost" ];
then
continue
fi
vardir=/var/lib/dirsrv/slapd-${name}
[ -d /var/lib/dirsrv/scripts-${name} ] &&
scriptdir=/var/lib/dirsrv/scripts-${name}
[ -d /usr/lib64/dirsrv/slapd-${name} ] &&
scriptdir=/usr/lib64/dirsrv/slapd-${name}
[ -d /usr/lib/dirsrv/slapd-${name} ] &&
scriptdir=/usr/lib/dirsrv/slapd-${name}
${scriptdir}/db2bak.pl -D "cn=${ldap_user}" -w "${ldap_password}"
-a ${vardir}/bak/${name}-${timestamp} -P LDAPI
dbdir=${vardir}/db
for dbentry in ${dbdir}/*
do
if [ -d ${dbentry} ] #check if directory exists
then
dbname=$(basename ${dbentry})
${scriptdir}/db2ldif -n ${dbname} -a ${vardir}/ldif/${dbname}-${timestamp}.ldif
fi
done
# Cleanup old entries
/usr/sbin/tmpwatch -mM ${retention_hours} ${vardir}/bak
/usr/sbin/tmpwatch -mM ${retention_hours} ${vardir}/ldif
done