Install Postgres 9.5, and then:
sudo pg_dropcluster 9.5 main --stop sudo pg_upgradecluster 9.3 main sudo pg_dropcluster 9.3 main
Specifically for using the WAL-E enabled Docker image, make sure WAL-E is turned off:
sudo pkill backupcron
Install postgresql 9.5:
wget https://alioth.debian.org/scm/loggerhead/pkg-postgresql/postgresql-common/trunk/download/head:/apt.postgresql.org.s-20130224224205-px3qyst90b3xp8zj-1/apt.postgresql.org.sh chmod a+x apt.postgresql.org.sh sed -i -e 's/$CODENAME-pgdg main/$CODENAME-pgdg main 9.5/g' apt.postgresql.org.sh sudo ./apt.postgresql.org.sh sudo apt-get install postgresql-9.5 sudo apt-get install postgresql-client-9.5 sudo apt-get install postgresql-contrib-9.5
Once the installation finished, I used
aptitude search to check which versions of postgres I have installed.
i postgresql - object-relational SQL database (supported version) i A postgresql-9.3 - object-relational SQL database, version 9.3 server i A postgresql-9.5 - object-relational SQL database, version 9.5 server i A postgresql-client-9.3 - front-end programs for PostgreSQL 9.3 i A postgresql-client-9.5 - front-end programs for PostgreSQL 9.5 i A postgresql-contrib-9.3 - additional facilities for PostgreSQL i A postgresql-contrib-9.5 - additional facilities for PostgreSQL
Looks like we successfully installed PostgreSQL 9.5, but I still need to upgrade from 9.3 to 9.5.
pg_lsclusters, your 9.3 and 9.5 main clusters should be "online".
pg_lsclusters Ver Cluster Port Status Owner Data directory Log file 9.3 main 5432 online postgres /var/lib/postgresql/9.3/main /var/log/postgresql/postgresql-9.3-main.log 9.5 main 5433 online postgres /var/lib/postgresql/9.5/main /var/log/postgresql/postgresql-9.5-main.log
There already is a cluster "main" for 9.5 (since this is created by default on package installation).
This is done so that a fresh installation works out of the box without the need to create a cluster first,
but of course it clashes when you try to upgrade 9.3/main when 9.5/main also exists.
The recommended procedure is to remove the 9.5 cluster with
pg_dropcluster and then upgrade with
Stop the 9.5 cluster and drop it.
sudo pg_dropcluster 9.5 main --stop
Upgrade the 9.3 cluster to the latest version.
sudo pg_upgradecluster 9.3 main
Your 9.3 cluster should now be "down".
pg_lsclusters Ver Cluster Port Status Owner Data directory Log file 9.3 main 5433 down postgres /var/lib/postgresql/9.3/main /var/log/postgresql/postgresql-9.3-main.log 9.5 main 5432 online postgres /var/lib/postgresql/9.5/main /var/log/postgresql/postgresql-9.5-main.log
Check that the upgraded cluster works, then remove the 9.3 cluster.
sudo pg_dropcluster 9.3 main
Now push an initial WAL-E base backup:
sudo -u postgres envdir /etc/wal-e.d/env wal-e backup-push
@johanndt Thanks again this has worked liked a charm for me as well....took quiet long almost 24 hours on about 500GB but finally came through.
Those that need new link to the apt file...please see below