Sebastian Mogilowskis Blog

Just another blog about administration, linux and other stuff

Fixing broken Thecus N8800PRO NAS or install Linux on Thecus N8880PRO NAS

A few days ago one of my old Thecus N8800PRO NAS storages stopped working. Instead of throwing it away i decided to take a closer look at it. First i discovered the missing VGA Port on the system. So no way for more debugging. But if open the NAS and take a closer look to […]

Dell OpenManage (OMSA) 8.3 on XenServer 7

First step is to add the Dell OpenManage Repository: wget -q -O – http://linux.dell.com/repo/hardware/DSU_16.05.00/bootstrap.cgi | bash Befor we can start the installer we had to fix the centos repository from the xenserver. Open “/etc/yum.repos.d/CentOS-Base.repo” with your favorite editor and change the baseurl from the [base] section to: baseurl=http://mirrors.kernel.org/centos/7.2.1511/os/x86_64 We have to do this because this […]

Upgrade to Citrix XenServer 6.5 to 7

First Download XenServer Installation ISO and the new Windows Management Console from: http://xenserver.org/overview-xenserver-open-source-virtualization/download.html Now upgrade your Management Console an reconnect to your XenServer Cluster. Now stop HA and move all VMs from the Master Host to the Slaves. You must start with the Master !! You can get your Master with this command: xe pool-list […]

Racktables Extension 0.3.3

Update of my racktables extension: Fixes and new features: – Fix: Fixes Bug in custom report for Racks, Rows and Locations – Fix: Changed directory structure – Feature: Added variable CSV Delimiter Tested with Racktables 0.20.10 Version 0.3.3: Racktables Extension (Version 0.3.3) (502.1 kB) Current Version Attension: New installation procedure with version 0.3.3 Move all […]

Simple Backup Script with logrotate

A simple backup script using logrotate to save multiple backups. I use a NFS storage mounted via autofs as backup location. Database Backup is optional. #!/bin/bash # Backup Target (Network Share mostly via autofs) BACKUP_DIR=”/tmp/foo” # Number of Backups BACKUP_NUM=3 # Directories to backup SOURCE_DIRS=”/var/www /var/log /etc” # Backup savelog -n -l -q -c $BACKUP_NUM […]

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Happy SysAdmin Day! 2015

July 31, 2015 – 16th Annual System Administrator Appreciation Day http://sysadminday.com http://www.sys-admin-day.de http://de.wikipedia.org/wiki/System_Administrator_Appreciation_Day

Backup VMs on Citrix XenServer

Hi, i published my backup solution for VMs running on a Citrix XenServer Host or Pool at GitHub. https://github.com/avarrish/xenbackup It creates snapshots of all VMs running and download it to your backup location. You need the Python XenAPI which is available here: https://pypi.python.org/pypi/XenAPI http://xenserver.org/overview-xenserver-open-source-virtualization/download.html (SDK) If you want to monitor your backups take a look […]

Error when reading from SSL socket connection – Dell iDRAC 5 PE2900/PE1900

If you try to connect with java-6-openjdk or java-7-openjdk to an iDrac5 you probably get this message: Error when reading from SSL socket connection The iDrac 5 ( PE 1900, PE 2900, … ) uses SSLv3 which is disabled in Java-6 and Java-7. Just edit /etc/java-6-openjdk/security/java.security or for Java 7 /etc/java-7-openjdk/security/java.security and comment out this […]

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Install Graylog 2 with Puppet

1. Informations Graylog is a very good syslog server for Linux. It collecting, indexing, and analyzing a lot of data and can send notifications via mail. https://www.graylog.org/ Note:I only tested this installation on Debian ! 2. Extra modules First you need some extra modules puppet module install elasticsearch-elasticsearch puppet module install puppetlabs-mongodb puppet module install […]

Dell OpenManage (OMSA) 7.4 on XenServer 6.5

Updated version !! Prerequirements You may need to disable the Citrix Yum Repository. Open “/etc/yum.repos.d/Citrix.repo” and change “enabled=1” to “enabled=0”. More informations about the packages are available here: http://linux.dell.com/wiki/index.php/Repository/OMSA. 1. Install required packages yum –enablerepo=base –enablerepo=updates –disablerepo=citrix install glibc.i686 yum –enablerepo=base –disablerepo=citrix install zlib.i386 yum –enablerepo=base –disablerepo=citrix install libxml2.i386 yum –enablerepo=base –disablerepo=citrix install libxslt.i386 yum […]

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