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…

LXC 와 Docker 그리고 Linux 컨테이너 기술들 살펴보기.

[docker] 컴퓨터의 성능이 향상되면서 가상화라는 단어는 일반적이되었습니다. 가상머신을 구현하기 위하여 VMWARE, KVM, Hyper-V 기술들을 사용하였으나, 최근에는 Docker로 대표되는 LXC (Linux Containers) 와 같은 컨테이너형 가상화쪽으로 화제가 옮겨가고 있습니다. 컨테이너형 가상화 기술은 기존의 가상화 기술보다 가벼워 지고, 이식성이 뛰어난 특징을 가지고 있습니다. Linux 컨테이너를 살펴보자면 OS의 내부는 물리적 자원을 관리하는 ‘커널 공간 “과 사용자 프로세스 (애플리케이션)을 실행하는”사용자 공간 “으로 나뉩니다. 컨테이너…

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