#kvm-virtualization

One of our goals at Mist.io, is to ease the pain of infrastructure management by providing a simple, touch-friendly interface for all of your infrastructure. Whether you’re using private or public cloud Virtual Machines, Docker containers or bare metal servers, Mist.io aims to streamline your management workflow. We are always aiming to support more diverse ecosystems and this week, we are proud to announce support for KVM and VMware’s vCloud.

Mist.io supports adding KVM backends via libvirt. It will show a list of all of the virtual machines (running and terminated), along with the hypervisor itself. You can execute actions such as reboot, shutdown and start. Instead of having to log in to the hypervisor to reboot a VM that has hanged, you can now do it with a few taps on your smartphone, laptop or tablet, along with the rest of your infrastructure.

Adding a KVM backend is a simple, one-step process. Just click on the Add Backend button and fill in the form.

If you don’t have keys associated with Mist.io, refer to our SSH keys documentation on how to connect Mist.io with your servers. If you don't specify an SSH key, Mist.io will assume that you are connecting via tcp (qemu+tcp), in this case the KVM hostname should have tcp port 5000 open and allowing connections from Mist.io. If you are running a standalone mist.io installation and KVM can be connected via unix socket, you could specify localhost as the hostname, and mist.io will try to connect via a unix socket (qemu:///system).

To add a vCloud backend, you’ll need the vCloud username and password, your Organization name and your Hostname.

Once you click Add, Mist.io will connect to your KVM or vCloud backend and your VMs will appear on the Machines list next the rest of your infrastructure, neatly tagged with the backend name to make them easier to find.

To create a new VM through Mist.io, click on the Create button and set the VM’s configuration in the popup form. You can optionally choose to run a command or have Mist.io set up monitoring once the server is up and running.

How to: understanding relationship between Qemu and KVM #dev #fix #development

understanding relationship between Qemu and KVM

What is the difference between KVM and Qemu? As I understand, latter is able to provide “user mode emulation” which means that one can run a single executable built for some other architecture like this:

# file busybox-sparc busybox-sparc: ELF 32-bit MSB executable, SPARC, version 1 (SYSV), statically linked, stripped # qemu-sparc busybox-sparc ls…

Answer: Virtualization: Guest in guest? #computers #it #solution

Virtualization: Guest in guest?

Does it make any sense to run a virtual machine with a “master” guest, and in that master guest run many other guests?

Has anyone tested this? Is it even possible? Are there better ways to accomplish my goals? (Read on.) (I googled for “guest in guest” and found nothing)

What I want to do: I’d like to set up and test various virtual networks, with database and…

Fix: Xen vs KVM: Which will have likely better support (read:bugfixes) in the future? #programming #solution #development

Xen vs KVM: Which will have likely better support (read:bugfixes) in the future?

I don’t care about GUI or tools, but I do care about stability and performance. If I’m running a FreeBSD firewall and a Opensolaris file server as guests, will I get better stability or performance (network and disk i/o) if I switch to KVM? Follow-up question: which is most likely to be rock-stable and near-native…

How-to: libvirt: Change dhcp-setup without restarting #answer #computers #solution

libvirt: Change dhcp-setup without restarting

I’m using libvirt and kvm to virtualize my server. I configured libvirt to start a dhcp-server on the bridge-network-interface to give the vm’s their ips. Every VM’s gets always the same ip based on its mac, this is configured like this:

Solution: How to quit QEMU monitor? #fix #answer #solution

How to quit QEMU monitor?

I launched KVM VM with this command:

kvm /kvm/hdd/v1/v1-1.raw -m 512 -daemonize -smp 2 -nographic -net nic,model=virtio,macaddr=aa:aa:aa:aa:aa:01 -net tap,ifname=tap0 -monitor telnet:localhost:7001,server,nowait,nodelay

Then I connect to the monitor via telnet. But when I’m quitting the monitor with ‘quit’ or ‘q’, the VM stops. Why and how to quit without stopping the…

Fixed: Jumbo frames between KVM guest and host? #dev #development #programming

Jumbo frames between KVM guest and host?

I am trying to implement a 9000 byte MTU for storage communication between KVM guests and the host system. The host has a bridge (br1) with a 9000 byte MTU:

host# ip link show br1 8: br1: mtu 9000 qdisc noqueue state UP link/ether fe:54:00:50:f3:55 brd ff:ff:ff:ff:ff:ff inet 172.16.64.1/24 brd 172.16.64.255 scope global br1 inet6…

How to: recommendations for efficient offsite remote backup solution of vm's #it #dev #fix

recommendations for efficient offsite remote backup solution of vm’s

I am looking for recommendations for backing up my current 6 vm’s(and soon to grow to up to 20). Currently I am running a two node proxmox cluster(which is a debian base using kvm for virtualization with a custom web front end to administer). I have two nearly identical boxes with amd phenom II x4’s and asus motherboards. Each…