카테고리: Linux

Ovirt : Convert physical/virtual systems to virtual using virt-p2v && virt-v2v then use it in ovirt DC

Here is the detailed process about virt-v2v and virt-p2v which can be used in an ovirt setup to migrate your physical and virtual systems to ovirt data center.!!! Below strings concludes about what is virt-v2v and virt-p2v, how it work, how it can be used for the conversion. It also includes how you can debug issues in this area. !!! I am sure there are many sysadmins who…

virt-v2v – Convert a guest to use KVM

SYNOPSIS virt-v2v -ic vpx://vcenter.example.com/Datacenter/esxi vmware_guest virt-v2v -ic vpx://vcenter.example.com/Datacenter/esxi vmware_guest \ -o rhev -os rhev.nfs:/export_domain –network rhevm virt-v2v -i libvirtxml guest-domain.xml -o local -os /var/tmp virt-v2v -i disk disk.img -o local -os /var/tmp virt-v2v -i disk disk.img -o glance virt-v2v -ic qemu:///system qemu_guest –in-place DESCRIPTION Virt-v2v converts guests from a foreign hypervisor to run on KVM. It can read Linux and…

CentOS 7 VNC 설정

1. GNOME Desktop 설치   yum groupinstall “GNOME Desktop” 2. tigervnc-server 설치 yum install tigervnc-server 3. vncserver 구설파일 설정 ( CentOS 7에서 구설파일 변화가 있다고함 )  cp /lib/systemd/system/vncserver@.service /etc/systemd/system/vncserver@:1.service 4. 구성파일 변경  vi /etc/systemd/system/vncserver@\:2.service [Unit] Description=Remote desktop service (VNC) After=syslog.target network.target [Service] Type=forking # Clean any existing files in /tmp/.X11-unix environment ExecStartPre=/bin/sh -c ‘/usr/bin/vncserver -kill %i > /dev/null 2>&1 || :’…

RHEL7: Configure a system as either an iSCSI target or initiator that persistently mounts an iSCSI target.

Presentation In the iSCSI world, you’ve got two types of agents: an iSCSI target provides some storage (here called server), an iSCSI initiator uses this available storage (here called client). As you already guessed, we are going to use two virtual machines, respectively called server and client. If necessary, the server and client virtual machines can be one and only one machine. iSCSI Target Configuration Most of the target configuration is done interactively through the targetcli command. This command uses a…

Gluster Architecture

Types of Volumes Volume is the collection of bricks and most of the gluster file system operations happen on the volume. Gluster file system supports different types of volumes based on the requirements. Some volumes are good for scaling storage size, some for improving performance and some for both. 1. Distributed Glusterfs Volume – This is the default glusterfs volume i.e, while…

Disk Performance Basics

Input/output operations per second or IOPS (IO/s), throughput (MB/s or MiB/s), and response time (ms) are the common performance measurements for storage devices, such disk drives or RAID sets. IOPS measure is generally used to describe storage device capability for handling random small block (4 – 8 KB in size) input-output (IO) requests that are typical for on-line transaction processing…

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