Author Archives: admin

Openvswitch – Cannot Update CentOS 7

Assalamualaikum Whenever you use CentOS 7 with openvswith enabled you cannot update you system. yum update will time out. The server can access the internet, the mirror server can be resolved. So what is the problem? Usually this happened on … Continue reading

Posted in Install, Linux, RedHat | Tagged , , , ,

Create ID In RHV/oVirt

Assalamualaikum… Below are step by step guide to create user in RHV/oVirt and give user privilege to access to Manager. Create ID ovirt-aaa-jdbc-tool user add hanief –attribute=firstName=Hanief –attribute=lastName=Harun –attribute=email=hanief@example.net Show ID ovirt-aaa-jdbc-tool user show hanief Set User Password ovirt-aaa-jdbc-tool user … Continue reading

Posted in Linux, oVirt, RHEV, RHV | Tagged ,

Error “Cannot import VM. Selected display type is not supported by the operating system” When Importing VM from RHEV to oVirt

Assalamualaikum, When importing VMs from a StorageDomain (usually export domain) you may get a “Cannot import VM. Selected display type is not supported by the operating system” error. This is my workaround solution. The issue happened when I try to … Continue reading

Posted in RHEV, RHV, Virtualization | Tagged , , ,

How to Check Top Running Processes by Highest Memory and CPU Usage in Linux

Assalamualiakum.. The following command will show the list of top processes ordered by RAM and CPU use in descendant form (remove the pipeline and head if you want to see the full list): ps -eo pid,ppid,cmd,%mem,%cpu –sort=-%mem | head Brief … Continue reading

Posted in Linux, UNIX | Tagged , , , ,

How to Backup oVirt Engine

Assalamualaikum.. Backup is straightforward. See –help for details. Below is the steps on how to backup ovirt engine. Example: engine-backup –mode=backup –file=backup1 –log=backup1.log Full backup engine-backup –mode=backup –scope=all –file=”/var/lib/ovirt-engine/backups/fullbackup-$(date +%Y%m%d%H%M%S).tar.bz2″ –log=/var/log/ovirt-engine/fullbackup-$(date +%Y%m%d%H%M%S).log DB backup engine-backup –mode=backup –scope=files –scope=db –file=”/var/lib/ovirt-engine/backups/DBbackup-$(date +%Y%m%d%H%M%S).tar.bz2″ … Continue reading

Posted in Linux, oVirt, RedHat, RHEV, RHV | Tagged , ,

Iperf3: How to Specify the Amount of Data to be Transmitted

Assalamulaikum. I need to test my server to server connection with 1gb data transfer. Below is the command Server IP: 10.200.200.5 Client IP: 10.200.200.4 On Server, run iperf -s On client, run iperf3 -c 10.200.200.5 -n 1G or iperf3 -c … Continue reading

Posted in Linux | Tagged ,

Configure Multipathing in Linux (RHEL7/CentOS7

Assalamualaikum, After you have assigned LUN (usually configured in storage) to the specific client, below is the steps on how to configure mutltipath on client machine (RHEL7/CentOS7. Install device-mapper-multipath root@www ~]# yum -y install device-mapper-multipath Install iSCSI Initiator. [root@www ~]# … Continue reading

Posted in Linux | Tagged , , , , , ,