'NoneType' object has no attribute 'end'

afgeek9818 · August 6, 2025, 2:24am

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Brief description of the problem

I installed Rockstor on a VMware virtual machine inside VMware Workstation. After successful installation I opened the webpage, input the hostname, username & password then clicked Submit.

Detailed step by step instructions to reproduce the problem

Create a new virtual machine inside VMware Workstation 17.5, select Linux OpenSUSE 64-bit, select virtual disk type (NVMe) and follow the rest of the prompts. After finishing creating the virtual machine I went back in and added 6 more hard drives that were 50GB each, all NVMe. I then opened the .vmx file and added disk.EnableUUID=“true” to the file and saved it. Then I started the vm and ran through the installation. Everything installed just fine and the webpage loads just fine, but after I input the initial required information I am presented with the error below. Please help me understand what is going on.

Web-UI screenshot

Error Traceback provided on the Web-UI


  Traceback (most recent call last):
  File "/opt/rockstor/src/rockstor/rest_framework_custom/generic_view.py", line 40, in _handle_exception
    yield
  File "/opt/rockstor/src/rockstor/storageadmin/views/disk.py", line 417, in post
    return self._update_disk_state()
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib64/python3.11/contextlib.py", line 81, in inner
    return func(*args, **kwds)
           ^^^^^^^^^^^^^^^^^^^
  File "/opt/rockstor/src/rockstor/storageadmin/views/disk.py", line 114, in _update_disk_state
    attached_disks = scan_disks(MIN_DISK_SIZE)
                     ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/rockstor/src/rockstor/system/osi.py", line 305, in scan_disks
    base_root_disk = root_disk()  # /dev/sda if /dev/sda3, or md126 if md126p2
                     ^^^^^^^^^^^
  File "/opt/rockstor/src/rockstor/system/osi.py", line 1013, in root_disk
    end = re.search("n1", disk).end()
          ^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'end'

Hooverdan · August 6, 2025, 7:57pm

@afgeek9818 welcome to the Rockstor community. Unfortunately, my experience with VMWare quirks is very limited, so I am not entirely sure what the problem might be here.

Let’s start with inspecting the disk attributes. If you can get to the command line (WebUI or other terminals software like PuTTY) on the VM, can you run this:

lsblk -P -o NAME,MODEL,SERIAL,SIZE,TRAN,VENDOR,HCTL,TYPE,FSTYPE,LABEL,UUID

I am curious whether there might be a missing disk attribute that’s causing the error. Looking at the coding, it might have to do with the device naming for nvme disks in your case.

github.com

rockstor/rockstor-core/blob/5fbf1dd102ac10a95db44baecde5be95fcf52ae6/src/rockstor/system/osi.py#L1003


      
              # prior numerical components ie starts /dev/md but then we
              # are here due to that match.  Find the indexes of the
              # device name without the partition.  Search for where the
              # numbers after "md" end.  N.B. the following will also
              # work if root is not in a partition ie on md126 directly.
              # Note: this same pattern is also shared by mmcblk (sdcard) devices.
              # Base device examples: mmcblk1 or mmcblk2
              # First partition on the first device would be mmcblk1p1
              end = re.search("\d+", disk).end()
              return disk[:end]
          if re.match("/dev/nvme", disk) is not None:
              # We have an nvme device. These have the following naming
              # conventions.
              # Base device examples: nvme0n1 or nvme1n1
              # First partition on the first device would be nvme0n1p1
              # The first number after 'nvme' is the device number.
              # Partitions are indicated by the p# combination ie 'p1'.
              # We need to also account for a root instal on the base
              # device itself as with the /dev/md parsing just in case,
              # so look for the end of the base device name via 'n1'.
              end = re.search("n1", disk).end()