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Upgrade CPU/RAM in KVM.

Upgrade CPU/RAM in KVM.

You can follow the following steps to increase memory size of your KVM virtual machine.
  1. Update the configuration using command sudo virsh edit
  2. reboot VM server.

Listing virtual servers.

 [ahmed@ahmed-server ~]$ sudo virsh  list
  Id    Name                           State
 ----------------------------------------------------
  8     VM-1                           running
  12    VM-2                           running
  13    VM-3                           running
  15    VM-4                           running

Getting Information about VM.

 [ahmed@ahmed-server ~]$ sudo virsh dominfo VM-1
 Id:             8
 Name:           VM-1
 UUID:           588ff640-25be-9b18-5eb3-f93c471848e6
 OS Type:        hvm
 State:          running
 CPU(s):         4
 CPU time:       503.3s
 Max memory:     8388608 KiB
 Used memory:    8388608 KiB
 Persistent:     yes
 Autostart:      disable
 Managed save:   no
 Security model: none
 Security DOI:   0

Edit Hardware for each VM.

 [ahmed@ahmed-server ~]$ sudo virsh edit VM-1
 Domain VM-1 XML configuration edited.

Checking VM information.

 [ahmed@ahmed-server ~]$ sudo virsh dominfo VM-1
 Id:             8
 Name:           VM-1
 UUID:           588ff640-25be-9b18-5eb3-f93c471848e6
 OS Type:        hvm
 State:          shut off
 CPU(s):         8
 Max memory:     33554432 KiB
 Used memory:    33554432 KiB
 Persistent:     yes
 Autostart:      disable
 Managed save:   no
 Security model: none
 Security DOI:   0
Once this is done restart the server.
And we are done.
 More Details : https://github.com/zubayr/big_config/blob/master/kvm/README.md

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