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Speed up a Ubuntu KVM host turn off process

Speed up a Ubuntu KVM host turn off process

I faced a problem - if there is a virtualization system KVM on ubuntu installed, then when host is turning off or rebooting, if it has working vms on it, the process of turning off is too slow. I've find out that this happens because of two things - the first is - when host is turning off virtual machines are comming to suspend state, and that process takes a long time. And second - there are too big timeouts for turning off - 5 minutes to each VM, and host can turn off only one vm at same time.

In this article I will show you how you can change suspend to power off, and how to decrease timeouts for turn off.

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Configuring a bridge in Ubuntu for KVM

In order for the network to work correctly on KVM virtual machines created on the Ubuntu host, you need to configure the bridge. If you do not configure it, the machine will have access to the Internet, but there will be no access to the other hosts on that network. The configuration is similar to setting up a network in Ubuntu with minor changes to the config.

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Managing the remote KVM host without entering a password, disable password entry for ssh

Hello. When using virt-manager to manage a remote KVM host, every time you open it, you need to enter the SSH connection password, which personally annoys me.

To permanently disable a password, if you open it, if remote hosts are connected to it, you need to add the ssh key to the host, which by the way will also allow you to not enter the password for SSH connection each time.

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