Chapter 9. Backing Up and Restoring Identity Management
- Catastrophic hardware failure on a machine occurs and the machine becomes incapable of further functioning. In this situation, you can reinstall the operating system from scratch, configure the machine with the same fully qualified domain name (FQDN) and host name, install the IdM packages as well as all other optional packages relating to IdM that were present on the original system, and restore the full backup of the IdM server.
- An upgrade on an isolated machine fails. The operating system remains functional, but the IdM data is corrupted, which is why you want to restore the IdM system to a known good state.
ImportantIn cases of hardware or upgrade failure, such as the two mentioned above, restore from backup only if all replicas or a replica with a special role, such as the only certificate authority (CA), were lost. If a replica with the same data still exists, it is recommended to delete the lost replica and then rebuild it from the remaining one.
- Undesirable changes were made to the LDAP content, for example entries were deleted, and you want to revert them. Restoring backed-up LDAP data returns the LDAP entries to the previous state without affecting the IdM system itself.
9.1. Full-Server Backup and Data-Only Backup
- Full-IdM server backup
- Full-server backup creates a backup copy of all the IdM server files as well as LDAP data, which makes it a standalone backup. IdM affects hundreds of files; the files that the backup process copies is a mix of whole directories and specific files, such as configuration files or log files, and relate directly to IdM or to various services that IdM depends on. Because the full-server backup is a raw file backup, it is performed offline. The script that performs the full-server backup stops all IdM services to ensure a safe course of the backup process.For the full list of files and directories that the full-server backup copies, see Section 9.1.3, “List of Directories and Files Copied During Backup”.
- Data-only Backup
- The data-only backup only creates a backup copy of LDAP data and the changelog. The process backs up the
IPA-REALMinstance and can also back up multiple back ends or only a single back end; the back ends include the
IPAback end and the
CA Dogtagback end. This type of backup also backs up a record of the LDAP content stored in LDIF (LDAP Data Interchange Format). The data-only backup can be performed both online and offline.
/var/lib/ipa/backup/directory. The naming conventions for the subdirectories containing the backups are:
ipa-full-YEAR-MM-DD-HH-MM-SSin the GMT time zone for the full-server backup
ipa-data-YEAR-MM-DD-HH-MM-SSin the GMT time zone for the data-only backup
9.1.1. Creating a Backup
ipa-backuputility which must always be run as root.
--onlineperforms an online backup; this option is only available with data-only backups
--logsincludes the IdM service log files in the backup
/tmpdirectory, change the location of the staged files to be created during the backup by using the
ipa-backup, see the ipa-backup(1) man page.
9.1.2. Encrypting Backup
- Create a
keygenfile containing the key details, for example, by running
cat >keygen <<EOFand providing the required encryption details to the file from the command line:
[root@server ~]# cat >keygen <<EOF > %echo Generating a standard key > Key-Type: RSA > Key-Length:2048 > Name-Real: IPA Backup > Name-Comment: IPA Backup > Name-Email: email@example.com > Expire-Date: 0 > %pubring /root/backup.pub > %secring /root/backup.sec > %commit > %echo done > EOF [root@server ~]#
- Generate a new key pair called
backupand feed the contents of
keygento the command. The following example generates a key pair with the path names
[root@server ~]# gpg --batch --gen-key keygen [root@server ~]# gpg --no-default-keyring --secret-keyring /root/backup.sec \ --keyring /root/backup.pub --list-secret-keys
ipa-backupby supplying the following options:
--gpg, which instructs
ipa-backupto perform the encrypted backup
--gpg-keyring=GPG_KEYRING, which provides the full path to the GPG keyring without the file extension.
[root@server ~]# ipa-backup --gpg --gpg-keyring=/root/backup
gpg2utility to generate GPG keys because
gpg2requires an external program to function. To generate the key purely from console in this situation, add the
pinentry-program /usr/bin/pinentry-cursesline to the
.gnupg/gpg-agent.conffile before generating a key.
9.1.3. List of Directories and Files Copied During Backup
/usr/share/ipa/html /root/.pki /etc/pki-ca /etc/pki/pki-tomcat /etc/sysconfig/pki /etc/httpd/alias /var/lib/pki /var/lib/pki-ca /var/lib/ipa/sysrestore /var/lib/ipa-client/sysrestore /var/lib/ipa/dnssec /var/lib/sss/pubconf/krb5.include.d/ /var/lib/authconfig/last /var/lib/certmonger /var/lib/ipa /var/run/dirsrv /var/lock/dirsrv
/etc/named.conf /etc/named.keytab /etc/resolv.conf /etc/sysconfig/pki-ca /etc/sysconfig/pki-tomcat /etc/sysconfig/dirsrv /etc/sysconfig/ntpd /etc/sysconfig/krb5kdc /etc/sysconfig/pki/ca/pki-ca /etc/sysconfig/ipa-dnskeysyncd /etc/sysconfig/ipa-ods-exporter /etc/sysconfig/named /etc/sysconfig/ods /etc/sysconfig/authconfig /etc/ipa/nssdb/pwdfile.txt /etc/pki/ca-trust/source/ipa.p11-kit /etc/pki/ca-trust/source/anchors/ipa-ca.crt /etc/nsswitch.conf /etc/krb5.keytab /etc/sssd/sssd.conf /etc/openldap/ldap.conf /etc/security/limits.conf /etc/httpd/conf/password.conf /etc/httpd/conf/ipa.keytab /etc/httpd/conf.d/ipa-pki-proxy.conf /etc/httpd/conf.d/ipa-rewrite.conf /etc/httpd/conf.d/nss.conf /etc/httpd/conf.d/ipa.conf /etc/ssh/sshd_config /etc/ssh/ssh_config /etc/krb5.conf /etc/ipa/ca.crt /etc/ipa/default.conf /etc/dirsrv/ds.keytab /etc/ntp.conf /etc/samba/smb.conf /etc/samba/samba.keytab /root/ca-agent.p12 /root/cacert.p12 /var/kerberos/krb5kdc/kdc.conf /etc/systemd/system/multi-user.target.wants/ipa.service /etc/systemd/system/multi-user.target.wants/sssd.service /etc/systemd/system/multi-user.target.wants/certmonger.service /firstname.lastname@example.org /var/run/ipa/services.list /etc/opendnssec/conf.xml /etc/opendnssec/kasp.xml /etc/ipa/dnssec/softhsm2.conf /etc/ipa/dnssec/softhsm_pin_so /etc/ipa/dnssec/ipa-ods-exporter.keytab /etc/ipa/dnssec/ipa-dnskeysyncd.keytab /etc/idm/nssdb/cert8.db /etc/idm/nssdb/key3.db /etc/idm/nssdb/secmod.db /etc/ipa/nssdb/cert8.db /etc/ipa/nssdb/key3.db /etc/ipa/nssdb/secmod.db
/var/log/pki-ca /var/log/pki/ /var/log/dirsrv/slapd-PKI-IPA /var/log/httpd /var/log/ipaserver-install.log /var/log/kadmind.log /var/log/pki-ca-install.log /var/log/messages /var/log/ipaclient-install.log /var/log/secure /var/log/ipaserver-uninstall.log /var/log/pki-ca-uninstall.log /var/log/ipaclient-uninstall.log /var/named/data/named.run