From dccc57338e7e2d8898c14868b7262420bcbaa531 Mon Sep 17 00:00:00 2001
From: vincent <vincent@ducamps.win>
Date: Wed, 16 Dec 2020 17:40:43 +0100
Subject: [PATCH] ad postgress upgrade procedure

---
 IT/SQL/PostgreSQL/Upgrade.md | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 IT/SQL/PostgreSQL/Upgrade.md

diff --git a/IT/SQL/PostgreSQL/Upgrade.md b/IT/SQL/PostgreSQL/Upgrade.md
new file mode 100644
index 0000000..c905f6e
--- /dev/null
+++ b/IT/SQL/PostgreSQL/Upgrade.md
@@ -0,0 +1,28 @@
+# Upgrading PostgreSQL Database
+
+when major release of postgresql is done you need to do some manual action
+if not done you can meet issue during request
+
+## action
+
+**need to have postgresqk-old-upgrade installed on arch**
+
+- stop service
+```systemctl stop postgresql.service```
+- rename cluster directory
+```mv /var/lib/postgres/data /var/lib/postgres/olddata
+mkdir /var/lib/postgres/data /var/lib/postgres/tmp
+chown postgres:postgres /var/lib/postgres/data /var/lib/postgres/tmp
+```
+- log in postgres account
+```
+sudo -iu postgres
+cd /var/lib/postgres/tmp
+
+```
+- launch upgrade
+```
+pg_upgrade -b /opt/pgsql-PG_VERSION/bin -B /usr/bin -d /var/lib/postgres/olddata -D /var/lib/postgres/data
+```
+- check both pg_hba.conf in new  and old cluster
+- restart server `sc-start postgresql`