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This documentation is sourced from a third-party project and is not maintained by pgEdge.

Upgrading

stanza-upgrade

The following instructions are not meant to be a comprehensive guide for upgrading PostgreSQL, rather they outline the general process for upgrading a primary and standby with the intent of demonstrating the steps required to reconfigure pgBackRest. It is recommended that a backup be taken prior to upgrading.

Stop old cluster

pg_ctlcluster 17 demo stop

Stop the old cluster on the standby since it will be restored from the newly upgraded cluster.

Stop old cluster

pg_ctlcluster 17 demo stop

Create the new cluster and perform upgrade.

Create new cluster and perform the upgrade

/usr/lib/postgresql/18/bin/initdb
                        -D /var/lib/postgresql/18/demo -k -A peer

pg_createcluster 18 demo

sh -c 'cd /var/lib/postgresql &&
                        /usr/lib/postgresql/18/bin/pg_upgrade
                            --old-bindir=/usr/lib/postgresql/17/bin
                            --new-bindir=/usr/lib/postgresql/18/bin
                            --old-datadir=/var/lib/postgresql/17/demo
                            --new-datadir=/var/lib/postgresql/18/demo
                            --old-options=" -c config_file=/etc/postgresql/17/demo/postgresql.conf"
                            --new-options=" -c config_file=/etc/postgresql/18/demo/postgresql.conf"'

sh -c 'cd /var/lib/pgsql &&
                        /usr/pgsql-18/bin/pg_upgrade
                            --old-bindir=/usr/pgsql-17/bin
                            --new-bindir=/usr/pgsql-18/bin
                            --old-datadir=/var/lib/postgresql/17/demo
                            --new-datadir=/var/lib/postgresql/18/demo
                            --old-options=" -c config_file=/etc/postgresql/17/demo/postgresql.conf"
                            --new-options=" -c config_file=/etc/postgresql/18/demo/postgresql.conf"'

Configure the new cluster settings and port.

Configure

archive_command = 'pgbackrest --stanza=demo archive-push %p'
archive_mode = on
log_filename = 'postgresql.log'

Update the pgBackRest configuration on all systems to point to the new cluster.

Upgrade the pg1-path

[demo]
pg1-path=/var/lib/postgresql/18/demo

Upgrade the pg-path

[demo]
pg1-path=/var/lib/postgresql/18/demo

Upgrade pg1-path and pg2-path, disable backup from standby

[demo]
pg1-path=/var/lib/postgresql/18/demo
[demo]
pg2-path=/var/lib/postgresql/18/demo
[global]
backup-standby=n

Copy hba configuration

cp /etc/postgresql/17/demo/pg_hba.conf
                    /etc/postgresql/18/demo/pg_hba.conf

Before starting the new cluster, the stanza-upgrade command must be run.

Upgrade the stanza

pgbackrest --stanza=demo --no-online
                    --log-level-console=info stanza-upgrade

Start the new cluster and confirm it is successfully installed.

Start new cluster

pg_ctlcluster 18 demo start

Test configuration using the check command.

Check configuration

pg_lsclusters

pgbackrest --stanza=demo check

Remove the old cluster.

Remove old cluster

pg_dropcluster 17 demo

rm -rf /var/lib/postgresql/17/demo

Install the new PostgreSQL binaries on the standby and create the cluster.

Remove old cluster and create the new cluster

pg_dropcluster 17 demo

rm -rf /var/lib/postgresql/17/demo

mkdir -p -m 700 /usr/lib/postgresql/18/bin

pg_createcluster 18 demo

Run the check on the repository host. The warning regarding the standby being down is expected since the standby cluster is down. Running this command demonstrates that the repository server is aware of the standby and is configured properly for the primary server.

Check configuration

pgbackrest --stanza=demo check

Run a full backup on the new cluster and then restore the standby from the backup. The backup type will automatically be changed to full if incr or diff is requested.

Run a full backup

pgbackrest --stanza=demo --type=full backup

Restore the demo standby cluster

pgbackrest --stanza=demo --delta --type=standby restore

pgbackrest --stanza=demo --type=standby restore

Configure

hot_standby = on

Start and check the configuration

pg_ctlcluster 18 demo start

pgbackrest --stanza=demo check

Backup from standby can be enabled now that the standby is restored.

Reenable backup from standby

[global]
backup-standby=y