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Text:	<p>This is a straight forward guide for safely upgrade from PostgreSQL 11.6 to 12.4</p> <b>First take a snapshot or save the entire virtual machine.</b> <h2>First get some information about the environment on the virtual machine.</h2> <code>pkg info | grep sql</code> <pre> postgresql11-client-11.6 PostgreSQL database (client) postgresql11-server-11.6 PostgreSQL is the most advanced open-source database available anywhere </pre> <p>Show Versions of the PostgreSQL databases</p> <code>/usr/local/bin/psql -U pgsql -d dbwnk2016 -t --command "show server_version"</code> <pre>11.6</pre> <p>List all databases</p> <code>psql -U pgsql -d dbwnk2016 -l</code> <pre> List of databases Name | Owner | Encoding | Collate | Ctype | Access privileges -------------+-------+----------+---------+-------+------------------- postgres | pgsql | UTF8 | C | C | template0 | pgsql | UTF8 | C | C | =c/pgsql + template1 | pgsql | UTF8 | C | C | =c/pgsql + dbwnk2016 | pgsql | UTF8 | C | C | (4 rows) </pre> <p>In our case we only need to upgrade database "dbwnk2016".</p> <h2>Take a dump of the whole PostgreSQL databases</h2> <pre><code>/usr/local/bin/pg_dump --create --encoding=UTF8 --column-inserts --dbname=dbwnk2016 \ --format=p --inserts --username=postgres \ --file=/usr/local/www/wnk20200821.sql </code></pre> <p>Check size of the exported data and ddl</p> <code>ls -altr /usr/local/www/*.sql</code> <samp> -rw-r--r-- 1 root wheel 161881860 Aug 21 12:59 /usr/local/www/wnk20200821.sql </samp> <h2>Update PostgreSQL default version in FreeBSD config files</h2> <p>At the time of writing the default version for postgreSQL was version 9.3. However, we need version 9.6.</p> <h2>Stop PostgreSQL 11 service and delete binaries</h2> <code>service postgresql stop</code> <p>delete PostgreSQL binaries</p> <code>pkg delete -fy postgresql11-server-11.6</code> <pre> Checking integrity... done (0 conflicting) Deinstallation has been requested for the following 1 packages (of 0 packages in the universe): Installed packages to be REMOVED: postgresql11-server: 11.6 Number of packages to be removed: 1 The operation will free 22 MiB. [1/1] Deinstalling postgresql11-server-11.6... [1/1] Deleting files for postgresql11-server-11.6: 100% ==> You should manually remove the "postgres" user. ==> You should manually remove the "postgres" group </pre> <code>pkg delete -fy postgresql11-client-11.6</code> <pre> The operation will free 12 MiB. [1/1] Deinstalling postgresql11-client-11.6... [1/1] Deleting files for postgresql11-client-11.6: 100% </pre> <h2>Install PostgreSQL 12</h2> <p>The installation of the PostgreSQL server software also installs the PostgreSQL client</p> <code> pkg install postgresql12-server </code> <pre> Updating FreeBSD repository catalogue... Fetching meta.txz: 100% 916 B 0.9kB/s 00:01 Fetching packagesite.txz: 100% 6 MiB 6.6MB/s 00:01 Processing entries: 100% FreeBSD repository update completed. 31941 packages processed. All repositories are up to date. New version of pkg detected; it needs to be installed first. The following 1 package(s) will be affected (of 0 checked): Installed packages to be UPGRADED: pkg: 1.13.2 -> 1.14.6 Number of packages to be upgraded: 1 6 MiB to be downloaded. Proceed with this action? [y/N]: y [1/1] Fetching pkg-1.14.6.txz: 100% 6 MiB 6.8MB/s 00:01 Checking integrity... done (0 conflicting) [1/1] Upgrading pkg from 1.13.2 to 1.14.6... [1/1] Extracting pkg-1.14.6: 100% Updating FreeBSD repository catalogue... FreeBSD repository is up to date. All repositories are up to date. The following 3 package(s) will be affected (of 0 checked): New packages to be INSTALLED: postgresql12-client: 12.3 postgresql12-server: 12.3 Installed packages to be UPGRADED: icu: 65.1,1 -> 67.1,1 The process will require 35 MiB more space. 17 MiB to be downloaded. Proceed with this action? [y/N]: y [1/3] Fetching postgresql12-server-12.3.txz: 100% 5 MiB 4.8MB/s 00:01 [2/3] Fetching icu-67.1,1.txz: 100% 10 MiB 10.6MB/s 00:01 [3/3] Fetching postgresql12-client-12.3.txz: 100% 3 MiB 2.7MB/s 00:01 Checking integrity... done (0 conflicting) [1/3] Upgrading icu from 65.1,1 to 67.1,1... [1/3] Extracting icu-67.1,1: 100% [2/3] Installing postgresql12-client-12.3... [2/3] Extracting postgresql12-client-12.3: 100% [3/3] Installing postgresql12-server-12.3... => Creating groups. Using existing group 'postgres'. => Creating users Using existing user 'postgres'. => Creating homedir(s) [3/3] Extracting postgresql12-server-12.3: 100% Message from postgresql12-client-12.3: The PostgreSQL port has a collection of "side orders": Message from postgresql12-server-12.3: -- For procedural languages and postgresql functions, please note thatyou might have to update them when updating the server. Please note that if you use the rc script, /usr/local/etc/rc.d/postgresql, to initialize the database, unicode (UTF-8) will be used to store character data by default. Set postgresql_initdb_flags or use login.conf settings described below to alter this behaviour. See the start rc script for more info. To set limits, environment stuff like locale and collation and other things, you can set up a class in /etc/login.conf before initializing the database. Add something similar to this to /etc/login.conf: --- postgres:\ :lang=en_US.UTF-8:\ :setenv=LC_COLLATE=C:\ :tc=default: --- and run `cap_mkdb /etc/login.conf'. Then add 'postgresql_class="postgres"' to /etc/rc.conf. To initialize the database, run /usr/local/etc/rc.d/postgresql initdb You can then start PostgreSQL by running: /usr/local/etc/rc.d/postgresql start For postmaster settings, see ~pgsql/data/postgresql.conf NB. If you're not using a checksumming filesystem like ZFS, you might wish to enable data checksumming. It can only be enabled during the initdb phase, by adding the "--data-checksums" flag to the postgres_initdb_flags rcvar. Check the initdb(1) manpage for more info and make sure you understand the performance implications. = To run PostgreSQL at startup, add 'postgresql_enable="YES"' to /etc/rc.conf </pre> <code> /usr/local/etc/rc.d/postgresql initdb </code> <pre> The files belonging to this database system will be owned by user "postgres". This user must also own the server process. Data page checksums are disabled. creating directory /var/db/postgres/data12 ... ok creating subdirectories ... ok selecting dynamic shared memory implementation ... posix selecting default max_connections ... 100 selecting default shared_buffers ... 128MB selecting default time zone ... UTC creating configuration files ... ok running bootstrap script ... ok performing post-bootstrap initialization ... ok syncing data to disk ... ok initdb: warning: enabling "trust" authentication for local connections You can change this by editing pg_hba.conf or using the option -A, or --auth-local and --auth-host, the next time you run initdb. Success. You can now start the database server using: /usr/local/bin/pg_ctl -D /var/db/postgres/data12 -l logfile start </pre> <p>Let's start the database</p> <code>service postgresql start</code> <pre> 2020-08-21 13:15:39.438 UTC [91900] LOG: starting PostgreSQL 12.3 on amd64-portbld-freebsd12.1, compiled by FreeBSD clang version 8.0.1 (tags/RELEASE_801/final 366581) (based on LLVM 8.0.1), 64-bit 2020-08-21 13:15:39.440 UTC [91900] LOG: listening on IPv6 address "::1", port 5432 2020-08-21 13:15:39.440 UTC [91900] LOG: listening on IPv4 address "127.0.0.1", port 5432 2020-08-21 13:15:39.442 UTC [91900] LOG: listening on Unix socket "/tmp/.s.PGSQL.5432" 2020-08-21 13:15:39.462 UTC [91900] LOG: ending log output to stderr 2020-08-21 13:15:39.462 UTC [91900] HINT: Future log output will go to log destination "syslog". </pre> <h2>Restore the exported databases</h2> <code>su postgres</code> <code> psql -f /usr/local/www/wnk20200821.sql > /var/log/www/wnk20200821crtdb.log </code> create role xyz with login; grant usage on schema lf24.to lf24. <code> psql -l dbwnk2016 </code> <h2>Reboot Virtual Maching</h2> <code> shutdown -r now </code> <h2>Cleanup</h2> <p>After successful upgrade you should delete the snapshot of the virtual machine and delete the files in /var/db/postgres/data11.</p> </p>
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