Merge pull request #10354 from adam-op/documentation/41326-update-postgresql-10-to-13-migration-documentation

[#41326] Update PostgreSQL 10 to 13 migration documentation

docs/installation-and-operations/misc/migration-to-postgresql13/README.md

@@ -6,7 +6,6 @@ OpenProject version 12+ will default to PostgreSQL 13. If you have an existing O
 
 <div class="alert alert-info" role="alert">
 Please follow this section only if you have installed OpenProject using [this procedure][package-based-installation].
-
 Before attempting the upgrade, please ensure you have performed a backup of your installation by following the [backup guide](../../operation/backing-up/).
 </div>
 
@@ -23,13 +22,30 @@ And verify that it outputs: postgres/autoinstall **install**.
 If that is not the case, you are likely using a self-provisioned database or a remote database. In this case, please follow the instructions from your provider or use generic PostgreSQL upgrade guides. A guide we can recommend for Debian/Ubuntu based servers is this one: https://gorails.com/guides/upgrading-postgresql-version-on-ubuntu-server Please adapt that guide or the following steps to your distribution.
 
 In the following, we assume that you initially let OpenProject setup your PostgreSQL installation, using a local database. 
+
+NOTE: RedHat and CentOS are slightly different, depending on which PostgreSQL pacakge/repository will be used.
+For the documentation parts titled RedHat/CentOS RedHat Enterprise Linux 8 was used.
+
+
+
 1. First, connect to your server and make sure your local version is PostgreSQL v10:
 
+For Debian/Ubuntu:
+
 ```bash
 sudo cat /var/lib/postgresql/10/main/PG_VERSION
 10
 ```
 
+For RedHat/CentOS:
+
+```bash
+sudo cat /var/lib/pgsql/10/data/PG_VERSION 
+10
+```
+
+
+
 2. Install the new version of PostgreSQL:
 
 For Debian/Ubuntu:
@@ -42,24 +58,34 @@ sudo apt-get install postgresql-13
 For RedHat/CentOS:
 
 ```bash
-sudo yum install postgresql-13
+sudo yum install pgsql13
+sudo /usr/bin/postgresql-13-setup initdb
 ```
 
-For SLES:
 
-```bash
-sudo zypper install postgresql-13
-```
 
 3. Stop the PostgreSQL servers:
 
+For Debian/Ubuntu:
+
 ```bash
 sudo su - postgres -c "/usr/lib/postgresql/10/bin/pg_ctl stop --wait --pgdata=/var/lib/postgresql/10/main"
 sudo su - postgres -c "/usr/lib/postgresql/13/bin/pg_ctl stop --wait --pgdata=/var/lib/postgresql/13/main"
 ```
 
+For RedHat/CentOS:
+
+```bash
+sudo su - postgres -c "/usr/pgsql-10/bin/pg_ctl stop --wait --pgdata=/var/lib/pgsql/10/data"
+sudo su - postgres -c "/usr/pgsql-13/bin/pg_ctl stop --wait --pgdata=/var/lib/pgsql/13/data"
+```
+
+
+
 4. Migrate your data to PostgreSQL 13:
 
+For Debian/Ubuntu:
+
 ```bash
 sudo su - postgres <<CMD
 /usr/lib/postgresql/13/bin/pg_upgrade \
@@ -72,28 +98,83 @@ sudo su - postgres <<CMD
 CMD
 ```
 
+For RedHat/CentOS:
+
+```bash
+sudo su - postgres <<CMD
+/usr/pgsql-13/bin/pg_upgrade \
+  --old-bindir=/usr/pgsql-10/bin \
+  --new-bindir=/usr/pgsql-13/bin \
+  --old-datadir=/var/lib/pgsql/10/data \
+  --new-datadir=/var/lib/pgsql/13/data \
+  --old-options '-c config_file=/var/lib/pgsql/10/data/postgresql.conf' \
+  --new-options '-c config_file=/var/lib/pgsql/13/data/postgresql.conf'
+CMD
+```
+
+
+
 5. Make PostgreSQL v13 the new default server to run on port 45432:
 
+For Debian/Ubuntu:
+
 ```bash
 sudo su - postgres -c "cp /etc/postgresql/{10,13}/main/conf.d/custom.conf"
 sudo su - postgres -c "sed -i 's|45432|45433|' /etc/postgresql/10/main/conf.d/custom.conf"
 sudo su - postgres -c "/usr/lib/postgresql/13/bin/pg_ctl start --wait --pgdata=/var/lib/postgresql/13/main -o '-c config_file=/etc/postgresql/13/main/postgresql.conf'"
 ```
 
-6. Check your OpenProject installation. A version higher than `13` should be displayed for `PostgreSQL version` in the "Administration > Information" section.
+For RedHat/CentOS:
+
+```bash
+sudo su - postgres -c "mkdir -p /var/lib/pgsql/13/data/conf.d"
+
+sudo su - postgres -c "vi /var/lib/pgsql/13/data/postgresql.conf"
+# at the section CONFIG FILE INCLUDES, please add the include directory conf.d
+include_dir = 'conf.d'
+
+sudo su - postgres -c "cp -p /var/lib/pgsql/10/data/conf.d/custom.conf /var/lib/pgsql/13/data/conf.d/custom.conf"
+sudo su - postgres -c "sed -i 's|45432|45433|' /var/lib/pgsql/10/data/conf.d/custom.conf"
+sudo su - postgres -c "/usr/pgsql-13/bin/pg_ctl start --wait --pgdata=/var/lib/pgsql/13/data -o '-c config_file=/usr/bin/postgresql-13-setup'"
+
+# Getting the password for the PostgreSQL database from the configuration
+sudo openproject config:get DATABASE_URL
+postgres://openproject:[CRYPTICAL-PASSWORD-STRING]@127.0.0.1:45432/openproject
+
+# Alter the password for user openproject in pgsql13
+[root@openproject ~]# su - postgres
+[postgres@openproject ~]$ psql --port 45432
+psql (13.6)
+Type "help" for help.
+postgres=# ALTER USER openproject WITH PASSWORD '[CRYPTICAL-PASSWORD-STRING]';
+ALTER ROLE
+postgres=# \q
+[postgres@openproject ~]$ logout
+```
+
+
+
+6. Check your OpenProject installation on the GUI. A version higher than `13.0` should be displayed for `PostgreSQL version` in the "Administration > Information" section.
+
+   
 
 7. If everything is fine, you can then remove your older PostgreSQL installation:
 
+For Debian/Ubuntu:
+
 ```bash
 sudo rm -rf /var/lib/postgresql/10/main
-# you can optionally go further and purge postgresql-10 from your system if you wish
-sudo apt-get purge postgresql-10 # debian/ubuntu
-sudo yum remove postgresql-10 # rhel/centos
-sudo zypper remove postgresql-10 # sles
+sudo apt-get purge postgresql-10
 ```
 
-[pg_upgrade]: https://www.postgresql.org/docs/10/pgupgrade.html
+For RedHat/CentOS:
 
+```bash
+sudo rm -rf /var/lib/pgsql/10/data
+sudo yum remove pgsql10
+```
+
+[pg_upgrade]: https://www.postgresql.org/docs/10/pgupgrade.html
 [package-based-installation]: ../../installation/packaged/
 
 ## Compose-based docker installation