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linux:kvm [2015/12/07 15:18] vondra [Pres libvirt + ssh] |
linux:kvm [2019/01/11 13:14] (current) admin |
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====== Instalace KVM ====== | ====== Instalace KVM ====== | ||
TODO: udelat tutorial :) | TODO: udelat tutorial :) | ||
+ | <code bash>aptitude -y install qemu-kvm libvirt-bin virtinst bridge-utils </code> | ||
====== Vytvoreni guesta ====== | ====== Vytvoreni guesta ====== | ||
===== Debian 8 ===== | ===== Debian 8 ===== | ||
- | - Instalace guestu:<code bash>virt-install -n vps1 --ram=2048 --vcpus=2 --location='http://ftp.cz.debian.org/debian/dists/jessie/main/installer-amd64/' --disk path=/dev/shared_vg/vps1 --network bridge=br0 --os-type linux --console pty,target_type=serial --graphics none --os-variant generic --extra-args 'console=ttyS0,115200n8 serial'</code> | + | - Install gues:<code bash>virt-install -n vps1 --ram=2048 --vcpus=2 --location='http://ftp.cz.debian.org/debian/dists/jessie/main/installer-amd64/' --disk path=/dev/shared_vg/vps1 --network bridge=br0 --os-type linux --console pty,target_type=serial --graphics none --os-variant generic --extra-args 'console=ttyS0,115200n8 serial'</code> |
- | - v grubu pridat do radky linux <code>console=tty0 console=ttyS0,115200</code> | + | - put following line into grubu in line starting with linux <code>console=tty0 console=ttyS0,115200</code> |
- | - do /etc/default/grub pridat do GRUB_CMDLINE_LINUX_DEFAULT "console=tty0 console=ttyS0,115200"<code>GRUB_CMDLINE_LINUX_DEFAULT="console=tty0 console=ttyS0,115200"</code> | + | - put "console=tty0 console=ttyS0,115200" into /etc/default/grub in GRUB_CMDLINE_LINUX_DEFAULT <code>GRUB_CMDLINE_LINUX_DEFAULT="console=tty0 console=ttyS0,115200"</code> |
+ | - update grub (this one i always forget and wondering why it doesn't work :))<code bash>update-grub</code> | ||
====== Vzdaleny pristup ====== | ====== Vzdaleny pristup ====== | ||
Line 44: | Line 45: | ||
conn.close() | conn.close() | ||
</code> | </code> | ||
- | ====== Level 1 Headline ====== | + | ====== HOT migration ====== |
+ | * NOTE: we cannot use kvm migration, since we use mirrored clustered LVM (mirrored volume could not be activated on more than one node in time) | ||
+ | * use following script instead:<code bash> | ||
+ | #!/bin/bash | ||
+ | if [ $# != 2 ]; then | ||
+ | echo "Usage: move_vps.sh domain destination" | ||
+ | exit 1 | ||
+ | fi | ||
+ | MACHINE=$1 | ||
+ | DESTINATION=$2 | ||
+ | |||
+ | XML_NAME=/tmp/$MACHINE | ||
+ | virsh dumpxml $MACHINE > $XML_NAME | ||
+ | scp ${XML_NAME} root@${DESTINATION}:${XML_NAME} | ||
+ | rm $XML_NAME | ||
+ | |||
+ | IMG_NAME=/tmp/${MACHINE}.img | ||
+ | virsh save $MACHINE $IMG_NAME | ||
+ | scp $IMG_NAME root@${DESTINATION}:${IMG_NAME} | ||
+ | rm $IMG_NAME | ||
+ | |||
+ | lvchange -an /dev/shared_vg/$MACHINE | ||
+ | ssh root@$DESTINATION "lvchange -ay /dev/shared_vg/$MACHINE" | ||
+ | ssh root@$DESTINATION "virsh define ${XML_NAME}" | ||
+ | ssh root@$DESTINATION "virsh restore $IMG_NAME" | ||
+ | ssh root@$DESTINATION "rm $IMG_NAME"</code> | ||
+ | |||
+ | |||
+ | ====== Correct shutdown ====== | ||
+ | // Keywords: Libvirt Can't shutdown or reboot virtual guest.\ | ||
+ | I can't reboot or shutdown the guest vm from the host mac// | ||
+ | |||
+ | <code bash> | ||
+ | modprobe virtio_console | ||
+ | apt install qemu-guest-agent | ||
+ | service qemu-ga restart | ||
+ | apt install acpid | ||
+ | </code> | ||
+ | |||
+ | Test if the agent is running | ||
+ | <code bash> | ||
+ | virsh qemu-agent-command jakub-sevcik '{"execute":"guest-info"}' | ||
+ | </code> |
linux/kvm.1449497903.txt.gz · Last modified: 2015/12/07 15:18 by vondra