KVM19: Exporting And Importing

# In The Name Of Allah .
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# Wed Nov 11 05:56:35 2020
# Written By : zer0err0r .
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# 19, Importing And Exporting VMs .
  = There is the VM_live_migration, And there is the normal importing and exporting method .
  = IDK about VM_live_migration yet, So, I will explain the normal importing and exporting method .

  
  # To export :
    $ virsh dumpxml centos1 > centos1.xml
    $ virsh vol-dumpxml --pool my_pool --vol centos1.qcow2 > centos1.qcow2.xml
    = Then copy the [.qcow2] file .

    # Exporting pools :
      $ virsh pool-dumpxml my_pool > my_pool.xml
    
    # Exporting network :
      $ virsh net-dumpxml NETWORK_NAME > NETWORK_NAME.xml

    # Tips and Tricks :
      = If you have a lot of VMs, And you want to backup all of them, Then execute :
      $ vim dump_all_xml.bash
        if [ ! -d ~/xml_files ]; then mkdir ~/xml_files;fi
        for item in $(virsh --connect qemu:///system list --all | awk '{print $2}' | grep -v Name); do
          virsh --connect qemu:///system dumpxml --domain $item > ~/xml_files/${item}.xml
        done
      $ bash dump_all_xml.bash
      = The script will be included in the description .
      
      # And BTW :
        = You can get all your VMs [.xml] files from [/etc/libvirt/qemu/] too , 
        = I just explained here what I applied before and worked with me :) .


  # To import :
    
    # In case of importing into a standalone kvm server :
      
      # First :
        = If you are not going to put the [.qcow2] files in the same place, Then modify your [.xml] files .
        = i.e., I want to change from the old [/var/lib/libvirt/images] into [/home/zer0err0r/kvm], So, Execute :
          $ grep -l '/var/lib/libvirt/images' *.xml | xargs sed -i 's/\/var\/lib\/libvirt\/images/\/home\/zer0err0r\/kvm/g'
        = And this is the affected line :
          <source file='/home/zer0err0r/kvm/...'/>

      # Then :
        = Then put the [.qcow2] file in the directory that you will save it at .

      # Finally :
        = Define the VM using the following command ,
        $ virsh define centos1.xml

      # Notice :
        = If you have a lot of VMs, Then use the previous [grep] command to modify all of them .
        = Then use the following command to [define] all of them ,
        $ for file in $(ls *.xml); do virsh --connect 'qemu:///system' define $file; done
        

    # In case of importing into a kvm with a storage pool :
      = The pool here is already defined, If not, Then define a new pool or import the exported pool .
      = To import use the following ,
      $ virsh pool-define my_pool.xml

      # Also :
        = Define your network settings using the following command ,
        $ virsh net-define default.xml

      # Then :
        = If you are not going to put the [.qcow2] files in the same place, Then modify your [.xml] files .
        = i.e., I want to change from the old [/var/lib/libvirt/images] into [/home/zer0err0r/kvm], So, Execute :
          $ grep -l '/var/lib/libvirt/images' *.xml | xargs sed -i 's/\/var\/lib\/libvirt\/images/\/home\/zer0err0r\/kvm/g'
        = And this is the affected line :
          <source file='/home/zer0err0r/kvm/...'/>

      # Then :
        = Modify the path of the volume [.xml] file, In this case [centos1.qcow2.xml], Then execute the following ,
        $ virsh vol-create --pool my_pool centos1.qcow2.xml

        # Attention :
          = It wont work with you if the file [centos1.qcow2] is already inside [~/kvm/] dir .
          = You need to execute the previous command before putting the file inside the [~/kvm/] dir .

      # Then :
        = Put the [.qcow2] file inside the pool directory .

      # Finally :
        $ virsh define centos1.xml
        $ virsh start centos1
        = Now it should work with you .

    
    # Again :
      
      # In case of standalone kvm server :
        = Modify the VM.xml file to the new path .
        = Put the [.qcow2] file inside the new path dir .
        $ virsh define VM.xml

      # In case of a storage pool kvm server :
        = Modify the [VM.xml] file to the new path .
        = Modify the [VM.qcow2.xml] file to the new path .
        $ virsh vol-create --pool my_pool VM.qcow2.xml
        = Put the [.qcow2] file inside the new path dir .
        $ virsh define VM.xml
  
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# Peace Be Up0n Muhammed .