install KVM on RHEL 1# pre-checks hardware for intel CPU 2grep -e 'vmx' /proc/cpuinfo 3lscpu | grep Virtualization 4lsmod | grep kvm 5 6# on RHEL9 Workstation 7sudo dnf install virt-install virt-viewer -y 8sudo dnf install -y libvirt 9sudo dnf install virt-manager -y 10sudo dnf install -y virt-top libguestfs-tools guestfs-tools 11sudo gpasswd -a $USER libvirt 12 13# Helper 14sudo dnf -y install bridge-utils 15 16# Start libvirt 17sudo systemctl start libvirtd 18sudo systemctl enable libvirtd 19sudo systemctl status libvirtd Basic Checks 1virsh nodeinfo Config a Bridge network Important note that network are created with root user but VM with current user.
General concern If you want to move VMs to an another Storage Domain, you need to copy the template from it as well!
Remove a disk:
1# IF RHV does not use anymore disk those should appear empty in lsblk: 2lsblk -a 3sdf 8:80 0 4T 0 disk 4└─36001405893b456536be4d67a7f6716e3 253:38 0 4T 0 mpath 5sdg 8:96 0 4T 0 disk 6└─36001405893b456536be4d67a7f6716e3 253:38 0 4T 0 mpath 7sdh 8:112 0 4T 0 disk 8└─36001405893b456536be4d67a7f6716e3 253:38 0 4T 0 mpath 9sdi 8:128 0 0 disk 10└─360014052ab23b1cee074fe38059d7c94 253:39 0 100G 0 mpath 11sdj 8:144 0 0 disk 12└─360014052ab23b1cee074fe38059d7c94 253:39 0 100G 0 mpath 13sdk 8:160 0 0 disk 14└─360014052ab23b1cee074fe38059d7c94 253:39 0 100G 0 mpath 15 16# find all disks from LUN ID 17LUN_ID="360014054ce7e566a01d44c1a4758b092" 18list_disk=$(dmsetup deps -o devname ${LUN_ID}| cut -f 2 |cut -c 3- |tr -d "()" | tr " " "\n") 19echo ${list_disk} 20 21# Remove from multipath 22multipath -f "${LUN_ID}" 23 24# remove disk 25for i in ${list_disk}; do echo ${i}; blockdev --flushbufs /dev/${i}; echo 1 > /sys/block/${i}/device/delete; done 26 27# You can which disk link with which LUN on CEPH side 28ls -l /dev/disk/by-* NFS for OLVM/oVirt Since oVirt need a shared stockage, we can create a local NFS to bypass this point if no Storage bay.
Hosted-engine Administration Connect to VM hosted-engine with root and password setup during the install: 1# Generate a backup 2engine-backup --scope=all --mode=backup --file=/root/backup --log=/root/backuplog 3 4# Restore from a backup on Fresh install 5engine-backup --mode=restore --file=file_name --log=log_file_name --provision-db --restore-permissions 6engine-setup 7 8# Restore a backup on existing install 9engine-cleanup 10engine-backup --mode=restore --file=file_name --log=log_file_name --restore-permissions 11engine-setup host Administration Connect in ssh to the Host: 1# Pass a host in maintenance mode manually 2hosted-engine --vm-status 3hosted-engine --set-maintenance --mode=global 4hosted-engine --vm-status 5 6# Remove maintenance mode 7hosted-engine --set-maintenance --mode=none 8hosted-engine --vm-status 9 10# upgrade hosted-engine 11hosted-engine --set-maintenance --mode=none 12hosted-engine --vm-status 13engine-upgrade-check 14dnf update ovirt\*setup\* # update the setup package 15engine-setup # launch it to update the engine /!\ Connect individually to KVM Virtmanager does not work OVirt use libvirt but not like KVM do…
Prerequisistes Check Compatibilty hardware: Oracle Linux Hardware Certification List (HCL)
A minimum of two (2) KVM hosts and no more than seven (7).
A fully-qualified domain name for your engine and host with forward and reverse lookup records set in the DNS.
/var/tmp 10 GB space at least
Prepared a shared-storage (nfs or iscsi) of at least 74 GB to be used as a data storage domain dedicated to the engine virtual machine. ISCSI need to be discovered before oVirt install.
