Unable to reset password for KVM VPS in SolusVM: inspect_os: lstat: /etc/sysconfig/network: Input/output error

Symptoms 

• Unable to reset KVM VPS password at SolusVM > Virtual Servers > VPS > Root/Admin Pass:

  CONFIG_TEXT: Error!
  Root/Administrator password could not be changed.
  This virtual server may not be linux or Windows

• When trying to mount the VPS LVM with libguestfs utilities there is the following error:

  # guestmount -a /dev/solusvm/kvm790_img -i --rw /mnt_tmp
  libguestfs: error: inspect_os: lstat: /etc/sysconfig/network: Input/output error

Cause

VPS's filesystem is corrupted.

Resolution

1. Connect to KVM slave node via SSH
2. Stop the VPS:

   # virsh destroy KVMID

   VMID of a VPS can be found in SolusVM > Virtual Servers > VMID column.

3. Backup the VPS
4. Find the VPS LVM image path:

   virsh domblklist VMID

   The example output should be as follows:
   

   # virsh domblklist kvm101
   Target    Source
   ------------------------------------------------
   hda        /dev/solusvm/VMID_img
   hdc        -

5. Map the VPS LVM image using its path from the previous step:

   # kpartx -a -v /dev/solusvm/VMID_img
   add map solusvm-VMID_img1 (253:44): 0 7859840 linear /dev/solusvm/VMID_img 2048
   add map solusvm-VMID_img2 (253:45): 0 524288 linear /dev/solusvm/VMID_img 7861888

6. Run e2fsck on both partition:

   # e2fsck /dev/mapper/solusvm-VMID_img1 -y && e2fsck /dev/mapper/solusvm-VMID_img2 -y

7. Unmap VPS LVM:

   # kpartx -d /dev/solusvm/VMID_img