Back up OpenNMS Meridian This section describes a basic backup process for a default OpenNMS Meridian installation. OpenNMS Meridian binaries, logs, RRD archives, configurations, and the database are backed up during this process. The backup storage path in this example is /tmp for demonstration purposes. Please be aware that /tmp is not persisted, as most operating systems will delete the content at bootup. Objectives Create a backup of OpenNMS Meridian components. Create a PostgreSQL database backup. Run a restore without having OpenNMS installation packages available. Requirements A system user with administrative permissions (sudo). Database password for opennms and postgres user. Create backup CentOS/RHEL 8 Stop OpenNMS Meridian service sudo systemctl stop opennms Back up OpenNMS Meridian binaries, RRD archives, configurations sudo tar --exclude='/opt/opennms/data/cache' -cvzf /tmp/opennms-opt.tar.gz /opt/opennms && \ sudo tar -cvzf /tmp/opennms-var.tar.gz /var/opennms Create PostgreSQL database backup sudo runuser -l postgres -c 'pg_dumpall -f /tmp/opennms-postgres.dmp' Back up OpenNMS Meridian operating system user sudo grep opennms /etc/passwd > /tmp/opennms-passwd.txt && \ sudo grep opennms /etc/group > /tmp/opennms-group.txt Upgrade Meridian with Git Restore OpenNMS Meridian