1.3. Backing up a containerized undercloud

Procedure

1. Log into the undercloud as the root user.

2. Install the mariadb client tools if they are not installed already:

   # dnf install mariadb

3. Copy the root configuration for the database:

   # cp /var/lib/config-data/puppet-generated/mysql/root/.my.cnf .

4. Create a backup directory, and change the user ownership of the directory to the stack user:

   [root@director ~]# mkdir /backup
   [root@director ~]# chown stack: /backup

5. Back up the database to the root directory:

   [root@director ~]# mysqldump --opt --all-databases > /root/undercloud-all-databases.sql

6. Archive the database backup and the configuration files:

   [root@director ~]# cd /backup
   [root@director ~]# tar --xattrs --xattrs-include='*.*' --ignore-failed-read -cf \
       undercloud-backup-`date +%F`.tar \
       /root/undercloud-all-databases.sql \
       /etc \
       /var/log \
       /var/lib/glance \
       /var/lib/certmonger \
       /var/lib/docker \
       /var/lib/registry \
       /srv/node \
       /root \
       /home/stack

   • The --ignore-failed-read option skips any directory that does not apply to your undercloud.
   • The --xattrs option includes extended attributed, which are required to store metadata for Object Storage (swift).

   This creates a file named undercloud-backup-<date>.tar.gz, where <date> is the system date. Copy this tar file to a secure location.