To auto start a KVM Virtual Machine on boot time, use command
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virsh autostart VMNAME_HERE |
To disable a VM from auto starting, run
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virsh autostart VMNAME_HERE --disable |
See KVM […]
Proxmox VE Access Console of LXC Container
To access console of a LXC container running under Proxmox, run
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pct enter CT_ID_HERE |
Example
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pct enter 106 |
You don’t need to enter password, you will be logged in as user root. See proxmox […]
Proxmox take snapshot of Virtual Machine
To take snapshot of virtual machine in proxmox, click on Virtual Machine, under Snapshots, clikc “Take Snapshot” button. To create snapshot through command line, login to Proxmox server as user root, then run
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qm snapshot VMID nameOfSnapShot |
nameOfSnapShot = no space or special chars allowed. Sould start/end with alphabet (numbers should NOT be used at start/end). See Proxmox […]
Proxmox pveperf
pveperf is a command line benchmarking tool in proxmox server.
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root@server70:~# pveperf CPU BOGOMIPS: 59199.84 REGEX/SECOND: 3672349 HD SIZE: 38.32 GB (/dev/md2) BUFFERED READS: 79.99 MB/sec AVERAGE SEEK TIME: 8.39 ms FSYNCS/SECOND: 23.87 DNS EXT: 16.46 ms DNS INT: 19.34 ms (hostonnet.com) root@server70:~# |
Here is benchmark on another server – Intel(R) Core(TM) i7-3930K CPU @ 3.20GHz, 2 * 120 GB SSD ATA OCZ-VERTEX3
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root@Proxmox-VE ~ # pveperf CPU BOGOMIPS: 76805.76 REGEX/SECOND: 1126262 HD SIZE: 14.70 GB (/dev/mapper/vg0-root) BUFFERED READS: 321.65 MB/sec AVERAGE SEEK TIME: 0.20 ms FSYNCS/SECOND: 1026.63 DNS EXT: 14.69 ms root@Proxmox-VE ~ # |
[…]
Proxmox useful command to manage Containers
pct is a command line tool to manage containers (LXC) in proxmox server. Here are some useful commands
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pct enter 100 pct enter 101 pct exec 100 yum update pct exec 100 yum update -y pct list pct reboot 100 pct resize 100 rootfs 100G pct set 101 -memory 10000 pct start 100 |
pct documentation available at https://pve.proxmox.com/pve-docs/pct.1.html See proxmox […]
proxmox config files
To find versions of proxmox packages
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pveversion -v |
Storage Config
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root@server70:~# cat /etc/pve/storage.cfg lvm: local_lvm vgname pve content images dir: local path /var/lib/vz content iso,rootdir,vztmpl,images maxfiles 0 root@server70:~# |
qemu config Config for KVM VMs stored in folder
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/etc/pve/nodes/HOSTNAME/qemu-server |
Example
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root@server70:~# cat /etc/pve/nodes/server70/qemu-server/100.conf boot: c bootdisk: virtio0 cores: 6 ide2: none,media=cdrom memory: 32768 name: vm701.hosthat.com net0: virtio=02:00:00:AC:77:3C,bridge=vmbr0 numa: 0 onboot: 1 ostype: l26 protection: 1 smbios1: uuid=28537e4f-e1ce-4f44-8421-e004370ab6b4 sockets: 1 virtio0: local_lvm:vm-100-disk-1,size=500G root@server70:~# |
Cluser
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root@server70:~# cat /etc/pve/.members { "nodename": "server70", "version": 3, "cluster": { "name": "help", "version": 1, "nodes": 1, "quorate": 1 }, "nodelist": { "server70": { "id": 1, "online": 1, "ip": "158.69.124.221"} } } root@server70:~# |
[…]
KVM VNC Allow Remote Access
By default VNC Console on a KVM virtual Machine only listens to localhost. So you need to do SSH tunnel to access VNC console. To make VNC available on all interfaces on Host machine, you need to edit file
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vi /etc/libvirt/qemu.conf |
You need to uncomment the line vnc_listen = “0.0.0.0”.
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# VNC is configured to listen on 127.0.0.1 by default. # To make it listen on all public interfaces, uncomment # this next option. # # NB, strong recommendation to enable TLS + x509 certificate # verification when allowing public access # vnc_listen = "0.0.0.0" |
Once this is done, you […]
Install Vagrant on CentOS
To install Vagrant on CentOS, go to https://www.vagrantup.com/downloads Get link to latest version, then run “rpm -ivh URL_TO_RPM_FILE”. At time of writing this post, latest Vagrant version is 2.2.9, to install Vagrant 2.2.9, run
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rpm -ivh https://releases.hashicorp.com/vagrant/2.2.9/vagrant_2.2.9_x86_64.rpm |
To check Vagrant version
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vagrant --version |
See Vagrant […]
Install Linux KVM on CentOS 8
To install Linux KVM hypervisor on CentOS 8, run
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dnf install qemu-kvm |
Install libvirtd
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dnf install libvirt-daemon libvirt-daemon-kvm libvirt-client |
Enable libvirtd to start on boot
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systemctl enable libvirtd |
Start libvirtd
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systemctl start libvirtd |
To see status, run
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systemctl status libvirtd |
Install virt-install
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dnf install virt-install |
Now you have Linux KVM installed. You can use virt-install or Virt Manager to create virtual machine. See Linux KVM Virtualization […]
OpenVZ
List available OS Templates in your server
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vzpkg list -O vzpkg list -O --with-summary |
To create a container, run
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prlctl create MyCT --vmtype ct --ostemplate centos-7-x86_64 |
Lit all vms
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prlctl list -a |
[…]