device alias playbook problem

[sinanejadebrahim]

hello,
trying to run this on ubuntu20 - third playbook ( device alias )gives an error

TASK [Get drive layout] *************************************************************************************
Monday 15 August 2022  09:18:58 +0000 (0:00:00.088)       0:00:56.839 ********* 
fatal: [ceph2]: FAILED! => changed=false 
  cmd:
  - /usr/bin/python3
  - /opt/45drives/tools/lsdev
  - -n
  delta: '0:00:00.058856'
  end: '2022-08-15 09:18:59.264560'
  msg: non-zero return code
  rc: 1
  start: '2022-08-15 09:18:59.205704'
  stderr: ''
  stderr_lines: <omitted>
  stdout: Error opening /etc/vdev_id.conf. Run `dmap`.
  stdout_lines: <omitted>
fatal: [ceph1]: FAILED! => changed=false 
  cmd:
  - /usr/bin/python3
  - /opt/45drives/tools/lsdev
  - -n
  delta: '0:00:00.062314'
  end: '2022-08-15 09:18:59.330074'
  msg: non-zero return code
  rc: 1
  start: '2022-08-15 09:18:59.267760'
  stderr: ''
  stderr_lines: <omitted>
  stdout: Error opening /etc/vdev_id.conf. Run `dmap`.
  stdout_lines: <omitted>

also on server when I run lsdev - I have this error
root@ceph1:~# lsdev
Error opening /etc/vdev_id.conf. Run dmap.
after running dmap this is the result

Scan Results: 
--------------------------------------------------------------------------------
{
    "Motherboard": {
        "Manufacturer": "?",
        "Product Name": "?",
        "Serial Number": "?"
    },
    "HBA": [],
    "Hybrid": false,
    "Serial": "?",
    "Model": "?",
    "Alias Style": "?",
    "Chassis Size": "?",
    "VM": true,
    "Edit Mode": false,
    "OS NAME": "Ubuntu",
    "OS VERSION_ID": "20.04"
}
/opt/45drives/tools/server_identifier: !! WARNING !!
                              Unable to determine server model automatically.
                              Server Info File Path:  (/etc/45drives/server_info/server_info.json)
                              You can edit the server_info file manually and run dmap again if using non-standard hardware.
                              If using standard 45Drives server hardware. Serialization should be performed before running dmap.
/opt/tools/45drives/dmap:     Unable to determine hardware configuration, drive mapping (modifications to /etc/vdev_id.conf) skipped. 
/opt/tools/45drives/dmap:     Unable to determine hardware configuration, udevadm trigger skipped. 

this is the content of the /etc/45drives/server_info/server_info.json file

{
    "Motherboard": {
        "Manufacturer": "?",
        "Product Name": "?",
        "Serial Number": "?"
    },
    "HBA": [],
    "Hybrid": false,
    "Serial": "?",
    "Model": "?",
    "Alias Style": "?",
    "Chassis Size": "?",
    "VM": true,
    "Edit Mode": false,
    "OS NAME": "Ubuntu",
    "OS VERSION_ID": "20.04"
}

[GodAtum360]

I am getting the same too. Is there a workaround?

[sinanejadebrahim]

I am getting the same too. Is there a workaround?
@GodAtum360

I think this only works on their servers - if somehow we could know what info is needed, we could maybe provide them with a script

[markdhooper]

Similar issue

The aim of dmap is to make /etc/vdev_id.conf
This creates the necessary device aliases for each disk to be used for storage on a given server, eash osd to be used in this case.

/etc/vdev_id.conf is a file that has device aliases. Here is an example vdev_id.conf file from a Storinator-AV15.

# This file was generated using dmap 2.0.4-1 (/opt/45drives/tools/dmap).
alias 1-1 /dev/disk/by-path/pci-0000:17:00.0-sas-phy2-lun-0
alias 1-2 /dev/disk/by-path/pci-0000:17:00.0-sas-phy3-lun-0
alias 1-3 /dev/disk/by-path/pci-0000:17:00.0-sas-phy1-lun-0
alias 1-4 /dev/disk/by-path/pci-0000:17:00.0-sas-phy0-lun-0
alias 1-5 /dev/disk/by-path/pci-0000:17:00.0-sas-phy6-lun-0
alias 1-6 /dev/disk/by-path/pci-0000:17:00.0-sas-phy7-lun-0
alias 1-7 /dev/disk/by-path/pci-0000:17:00.0-sas-phy5-lun-0
alias 1-8 /dev/disk/by-path/pci-0000:17:00.0-sas-phy4-lun-0
alias 1-9 /dev/disk/by-path/pci-0000:17:00.0-sas-phy18-lun-0
alias 1-10 /dev/disk/by-path/pci-0000:17:00.0-sas-phy19-lun-0
alias 1-11 /dev/disk/by-path/pci-0000:17:00.0-sas-phy17-lun-0
alias 1-12 /dev/disk/by-path/pci-0000:17:00.0-sas-phy16-lun-0
alias 1-13 /dev/disk/by-path/pci-0000:17:00.0-sas-phy22-lun-0
alias 1-14 /dev/disk/by-path/pci-0000:17:00.0-sas-phy23-lun-0
alias 1-15 /dev/disk/by-path/pci-0000:17:00.0-sas-phy21-lun-0

These correspond to the named drive slots in an AV15 Storinator. But if you want to make your own vdev_id.conf file on each osd node. Start by running this on all osd nodes first:
echo "# this is a placeholder vdev_id.conf to satisfy device-alias.yml" > /etc/vdev_id.conf

Then if you want to create your own device aliases, add them /etc/vdev_id.conf in for each osd node in their respective files:
I highly suggest that you use the devices listed in /dev/disk/by-path/ and not /dev/sd? if you go this route.

the device alias playbook will finish if you have /etc/vdev_id.conf on each osd and it DOESN'T have 'dmap' in the first line. Otherwise it will run dmap again. If you don't have /etc/vdev_id.conf, it will just run dmap. And since you aren't running it on a 45drives server, it's not going to/designed to work automatically.

We have udev rules, and a script that runs when the rule fires that will reference /etc/vdev_id.conf to create the required symlinks for each device in /dev/ (eg /dev/1-1), and /dev/disk/by-vdev/ (eg /dev/disk/by-vdev/1-1)

dmap, when successful, will also ensure that the required files are present and then run udevadm control --reload-rules and udevadm trigger.

Those files are as follows:
/usr/lib/udev/rules.d/68-vdev.rules 68-vdev.rules
/usr/lib/udev/vdev_id_45drives vdev_id_45drives

So, in summary:
echo "# this is a placeholder vdev_id.conf to satisfy device-alias.yml" > /etc/vdev_id.conf
cd /usr/lib/udev/rules.d
curl -LO https://raw.githubusercontent.com/45Drives/tools/master/src/fakeroot/opt/45drives/tools/68-vdev.rules
cd /usr/lib/udev
curl -LO https://raw.githubusercontent.com/45Drives/tools/master/src/fakeroot/opt/45drives/tools/vdev_id_45drives
chmod +x /usr/lib/udev/vdev_id_45drives
Add any aliases to disks that you want to be used as osds by looking in /dev/disk/by-path/ and adding them to /etc/vdev_id.conf

eg: alias 1-1 /dev/disk/by-path/pci-0000:17:00.0-sas-phy2-lun-0

Then trigger the udev rules:
udevadm control --reload-rules
udevadm trigger

and as a sanity check, see that the devices show up in /dev/ and /dev/disk/by-vdev/

That should let the /opt/45drives/tools/generate-osd-vars.sh to run as desired in the device-alias.yml playbook work as desired.

Hope that helps, sorry for taking so long to respond.