db-koji02: make sure backup uses all cpus

Signed-off-by: Kevin Fenzi <kevin@scrye.com>

roles/postgresql_server/files/backup-database.db-koji02

@@ -0,0 +1,16 @@
+#!/bin/bash
+# Backup a database *locally* to /backups/.
+
+# Sleep a bit so we do not have a thundering herd on db hosts
+sleep $[ ( $RANDOM % 7200 )  + 1 ]s
+
+DB=$1
+
+# Make our latest backup
+# Make it use a limited number of threads because pxz will use all the
+# cpus which causes pg_dump to starve which causes...
+
+/usr/bin/pg_dump --exclude-table-data=sessions -C $DB | /usr/bin/pxz -T24 > /backups/$DB-$(date +%F).dump.xz
+
+# Also, delete the backup from a few days ago.
+rm -f /backups/$DB-$(date --date="1 days ago" +%F).dump.xz

roles/postgresql_server/tasks/main.yml

@@ -105,6 +105,12 @@
   tags:
   - postgresql
 
+- name: Copy over backup scriplet
+  copy: src=backup-database dest=/usr/local/bin/backup-database mode=0755
+  when: not inventory_hostname.startswith('db-koji02')
+  tags:
+  - postgresql
+
 - name: Copy over backup scriplet
   copy: src=backup-database dest=/usr/local/bin/backup-database mode=0755
   when: inventory_hostname.startswith('db-koji02')