[Bug 1867366] Re: hostnqn fails to automatically generate after installing nvme-cli

[Dan Streetman]

root at lp1867366-b:~# dpkg -l|grep nvme-cli
ii  nvme-cli                         1.5-1ubuntu1                        amd64        userspace tooling to control NVMe drives
root at lp1867366-b:~# cat /etc/nvme/hostnqn
cat: /etc/nvme/hostnqn: No such file or directory
root at lp1867366-b:~# nvme gen-hostnqn
"gen-hostnqn" not supported. Install lib uuid and rebuild.
root at lp1867366-b:~# cat /etc/nvme/hostid
cat: /etc/nvme/hostid: No such file or directory


root at lp1867366-b:~# dpkg -l|grep nvme-cli
ii  nvme-cli                         1.5-1ubuntu1.1                      amd64        userspace tooling to control NVMe drives
root at lp1867366-b:~# cat /etc/nvme/hostnqn
nqn.2014-08.org.nvmexpress:uuid:e87565e4-474e-4c3f-824a-2d706da92ab0
root at lp1867366-b:~# nvme gen-hostnqn
nqn.2014-08.org.nvmexpress:uuid:62877ef4-3914-479a-8703-2250e49e101e
root at lp1867366-b:~# cat /etc/nvme/hostid
5376e2f0-7304-4117-80c2-a93fa78a001e

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https://bugs.launchpad.net/bugs/1867366

Title:
  hostnqn fails to automatically generate after installing nvme-cli

Status in nvme-cli package in Ubuntu:
  Fix Released
Status in nvme-cli source package in Bionic:
  Fix Committed
Status in nvme-cli source package in Focal:
  Fix Released
Status in nvme-cli source package in Groovy:
  Fix Released
Status in nvme-cli package in Debian:
  Unknown

Bug description:
  [impact]

  "nvme gen-hostnqn" does not work, leading to no content in
  /etc/nvme/hostnqn

  also, /etc/nvme/hostid is generated at build time instead of install
  time, leading to a hardcoded value for all systems, while the file is
  supposed to contain a unique value (uuid) for the system

  [test case]

  hostnqn tests:

  $ cat /etc/nvme/hostnqn

  $ nvme gen-hostnqn
  "gen-hostnqn" not supported. Install lib uuid and rebuild.

  hostid test for unique value:

  $ cat /etc/nvme/hostid 
  9ce77162-5a3e-439b-a73f-cdf2449521b6

  (that specific uuid is hardcoded into the nvme-cli 1.9-1 package)

  [regression potential]

  any regression would likely involve a failure of nvme to interact with
  nvmeof devices, or for other systems connecting to this nvme fabric
  target to encounter errors

  also, the upload for Focal includes a postinst check for the hardcoded
  hostid value (from the 1.9-1 package), and if it's found *and* the
  hostnqn is not set (meaning the system has not been setup yet), it
  regenerates it (so the host has a unique generated value). Any
  regression in this area would likely involve the same issues as above
  with NVMEoF problems, either in connecting or operating the system as
  a target.

  see comments 11-17 for more analysis of the issue and regression
  potential.

  [scope]

  xenial does not include the gen-hostnqn command, so this is needed
  only for bionic and later.

  in bionic, the 'gen-hostnqn' command exists, but the /etc/nvme/hostnqn
  file is not (yet) provided by the package, however per recommendation
  in comment 17, the postinst script is being added to the bionic
  upload, so the hostid and hostnqn files will be generated at package
  installation.

  [other info]

  to fix this in debian:
  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=969183
  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=969340

  [original description]

  hostnqn fails to automatically generate after installing nvme-cli

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: nvme-cli 1.9-1
  ProcVersionSignature: Ubuntu 5.4.0-9.12-generic 5.4.3
  Uname: Linux 5.4.0-9-generic x86_64
  ApportVersion: 2.20.11-0ubuntu18
  Architecture: amd64
  Date: Fri Mar  6 14:09:20 2020
  Dependencies:
   gcc-9-base 9.2.1-21ubuntu1
   libc6 2.30-0ubuntu3
   libgcc1 1:9.2.1-21ubuntu1
   libidn2-0 2.2.0-2
   libunistring2 0.9.10-2
  InstallationDate: Installed on 2020-03-05 (0 days ago)
  InstallationMedia: Ubuntu-Server 20.04 LTS "Focal Fossa" - Alpha amd64 (20200124)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: nvme-cli
  UpgradeStatus: No upgrade log present (probably fresh install)
  modified.conffile..etc.nvme.hostnqn: [modified]
  mtime.conffile..etc.nvme.hostnqn: 2020-03-06T11:27:08.674276

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