Merge branch 'sqlbackup' into 'master'

Added new role to enable Slurm DB SQL to be backed up and then ssh to a node.

See merge request !125

roles/slurm_sql_bk/defaults/main.yml

+---
+# for slurm mysql backup
+SQL_BK_DIR: "/mnt/db_backup"
+SQL_BK_DEST_HOST: "m3-mgmt1"
+SQL_BK_DEST_DIR: "/mnt/home/slurm_db_backup"
+SQL_USER: "slurmsqlbk"

roles/slurm_sql_bk/tasks/main.yml

+---
+# this code is for the sql server only
+  - name: template sql backupscript to /etc/cron.daily
+    template: src="backup_mysql_for_slurm.sh.j2" dest="/etc/cron.daily/backup_mysql_for_slurm.sh"  mode="700"
+    sudo: true
+    when: server == 'True'
+  - name: Create directory {{ SQL_BK_DIR }}
+    file: path={{ SQL_BK_DIR }} state=directory
+    sudo: true
+    when: server == 'True'
+  - name: template mysql config file to server
+    template: src="mysql.conf.j2" dest="{{ SQL_BK_DIR }}/mysql.conf" mode="600"
+    sudo: true
+    when: server == 'True'
+  - name: copy ssh pub key to .ssh if it does not exist already
+    copy: src="id_rsa.pub" dest="/root/.ssh/id_rsa.pub"
+    sudo: true
+    when: server == 'True'
+  - name: copy ssh private key to .ssh if it does not exist already
+    copy: src="id_rsa" dest="/root/.ssh/id_rsa" mode="600"
+    sudo: true
+    when: server == 'True'
+    
+#this code is for the Destination Node only
+  - name: create dummy user account
+    user: name="{{ SQL_USER }}" comment="Account for scp of slurm sql backups" 
+    sudo: true
+    when: server == 'False'
+  - name: Add MySQL server ssh key to authorised_files on management nodes"
+    authorized_key: user="{{ SQL_USER }}" state=present  key="{{ lookup('file', 'id_rsa.pub') }}" #"
+    sudo: true
+    when: server == 'False'
+  - name: ensure the dest directory exists (for backups to be copied too)
+    file: path={{ SQL_BK_DEST_DIR }} state=directory owner={{ SQL_USER }}
+    sudo: true
+    when: server == 'False'
+  - name: setup cron job to delete old slurm logs
+    template: src="delete_old_mysql_bk.sh.j2" dest="/etc/cron.daily/delete_old_mysql_bk.sh"  mode="700"
+    sudo: true
+    when: server == 'False'

roles/slurm_sql_bk/templates/backup_mysql_for_slurm.sh.j2

+#!/bin/sh
+#
+# mysql dump for slurm. 
+# S.Michnowicz
+# 20/Jan/2016
+#
+
+TIME=$(date '+%y-%m-%d')
+DIR={{ SQL_BK_DIR }}
+NAME="$DIR/mysql_dump_20${TIME}.sql"
+
+sudo mysqldump  --defaults-file=$DIR/mysql.conf   slurm_acct_db > $NAME
+sudo chmod go-r $NAME
+sudo gzip -f $NAME
+#scp file to   dummy user @ Destination Node and Directory
+scp ${NAME}.gz  {{ SQL_USER }}@{{ SQL_BK_DEST_HOST }}:{{ SQL_BK_DEST_DIR }}
+rm -f  ${NAME}.gz 

roles/slurm_sql_bk/templates/delete_old_mysql_bk.sh.j2

+#!/bin/sh
+#
+# delete old backups from slurm mysql
+# S.Michnowicz
+#
+
+#  2 day timeframe specified by -mtime +2
+#  also includes email check
+#find  {{ SQL_BK_DEST_DIR }} -type f -mtime +2 -name 'mysql_dump_*.gz' -execdir   mail -s "Deleting {}" simon.michnowicz@monash.edu < /dev/null  \; -execdir rm -f {} \;
+find  {{ SQL_BK_DEST_DIR }} -type f -mtime +7 -name 'mysql_dump_*.gz' -execdir rm -f {} \;
+

roles/slurm_sql_bk/templates/mysql.conf.j2

+[client]
+password="{{ sqlrootPasswd }}"
+user=root