CEPH bluestore using ceph-ansible

Just to test the ceph bluestore i have created 2 virtual machine in virtualbox with hostname: admin & osd1.

Attached the 2 10G hdd for the OSD's in both the nodes.

Below are the commands that i used to deploy it using the ceph-ansible:

git clone
cd ceph-ansible
cp group_vars/osds.yml.sample group_vars/osds.yml
cp group_vars/all.yml.sample group_vars/all.yml
cp group_vars/mons.yml.sample group_vars/mons.yml
cp site.yml.sample site.yml

vi group_vars/osds.yml
   - /dev/sdb
    - /dev/sdc
bluestore : true

vi group_vars/all.yml
ceph_stable: true
ceph_stable_release: kraken
ceph_stable_repo: "{{ ceph_mirror }}/rpm-{{ ceph_stable_release }}"

monitor_interface: enp0s3
monitor_address: 192.xx.xx.xx
osd_objectstore: bluestore

   enable experimental unrecoverable data corrupting features: 'bluestore rocksd…

Solved : Unable to lock the administration directory (/var/lib/dpkg/)

Delete the lock file using below command:

sudo rm /var/lib/apt/lists/locksudo rm /var/cache/apt/archives/lock
now you can install package using apt-get command.

Install Scala in CentOS 6

Installation of Scala Steps :

wget xvf scala-2.11.1.tgzsudo mvscala-2.11.1/usr/libsudo ln-f-s/usr/lib/scala-2.11.1/usr/lib/scala
Configuration of Scala in CentOS Add to PATH,
edit /etc/profile.d/ export PATH=$PATH:/usr/lib/scala/bin source /etc/profile.d/  $ scala -version Scala code runner version 2.11.1 -- Copyright 2002-2013, LAMP/EPFL 
Note :
for future ref:
substitute the latest release by visiting, click on the latest release and scroll down to “Other resources”. There you’ll find the Max OS X, Unix, Cygwin version .tgz file. Right click and copy the url to your clipboard and use it in your wget [right-click-paste].

Start wildfly service with standalone-full.xml

Wildfly provides a service.bat in %WILDFLY_HOME%\bin\service. Calling the batch file with the install parameter installs Wildfly as a service on Windows. Once it is installed on windows, you can change the settings so that wildfly starts all the modules and services instead of default minimal setup. For this, change standalone.bat file and add this line : set "SERVER_OPTS=--server-config=standalone-full.xml" This will enable startup of all modules & services of wildfly from now on.

Scan FC LUN's in RHEL/CentOS

1.First find out how many disks are visible in “fdisk -l” .
# fdisk -l 2>/dev/null | egrep '^Disk' | egrep -v 'dm-' | wc -l 2.Find out how many host bus adapter configured in the Linux can use “systool -fc_host -v” to verify available FC in the system.
# ls /sys/class/fc_host host0 host1 In this case,you need to scan host0 & host1 HBA.

3.If the system virtual memory is too low ,then do not proceed further.If you have enough free virtual memory,then you can proceed with below command to scan new LUNS.
# echo "1" > /sys/class/fc_host/host0/issue_lip # echo "1" > /sys/class/fc_host/host1/issue_lipNote:You need to monitor the “issue_lip” in /var/log/messages to determine when the scan will complete.This operation is an asynchronous operation.

4.Verify if the new LUN is visible or not by counting the available disks. # fdisk -l 2>/dev/null | egrep '^Disk' | egrep -v 'dm-' | wc -l If any new LUNS added ,then you can see…

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On Windows CMD Prompt:dir /s /b /o:gnOn UNIX :find . -print | sed 's;[^/]*/;|___;g;s;___|; |;g'

How to enable federated engine in MySQL

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