Fix finding paused databases from pgbouncer show databases command

- Dynamically locates the correct index for the paused
  database field in output to avoid problems where upstream
  changes to the output would then cause the high available
  failover mechanisms to fail when the primary database
  node goes down.

Closes https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/8166

Changelog: fixed

Signed-off-by: Balasankar "Balu" C <[email protected]>

Author: balasankarc

files/gitlab-ctl-commands-ee/lib/pgbouncer.rb

@@ -133,10 +133,14 @@ def database_paused?
 
       databases = show_databases
 
-      # In `show databases` output, column 10 gives paused status of database
-      # (1 for paused and 0 for unpaused)
-      paused_status = databases.lines.find { |x| x.match(/#{@database}/) }.split('|')[10].strip
+      # Find the headings of the output from `SHOW DATABASES` to find out the location of the `paused` column
+      headings = databases.lines.first.split("|").map(&:strip)
+      paused_position = headings.index('paused')
 
+      # Find the paused value of the specified database
+      paused_status = databases.lines.find { |x| x.match(/#{@database}/) }.split('|')[paused_position].strip
+
+      # 1 for paused and 0 for unpaused
       paused_status == "1"
     end