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[Matt Bearup <mbearup@xxxxxxxxxxxxx>]

Public bug reported:

The symptom is similar to 1611074 but the cause is different. In this
case it seems there is an error accessing /dev/sdb1 when lsblk is run,
possibly because sgdisk isn't done creating the partition. The specific
error message is "/dev/sdb1: not a block device." A simple wait and
retry here may resolve the issue.

util.py[DEBUG]: Running command ['/sbin/sgdisk', '-p', '/dev/sdb'] with allowed return codes [0] (shell=False, capture=True)
cc_disk_setup.py[DEBUG]: Device partitioning layout matches
util.py[DEBUG]: Creating partition on /dev/disk/cloud/azure_resource took 0.056 seconds
cc_disk_setup.py[DEBUG]: setting up filesystems: [{'filesystem': 'ext4', 'device': 'ephemeral0.1', 'replace_fs': 'ntfs'}]
cc_disk_setup.py[DEBUG]: ephemeral0.1 is mapped to disk=/dev/disk/cloud/azure_resource part=1
cc_disk_setup.py[DEBUG]: Creating new filesystem.
cc_disk_setup.py[DEBUG]: Checking /dev/sdb against default devices
cc_disk_setup.py[DEBUG]: Manual request of partition 1 for /dev/sdb1
cc_disk_setup.py[DEBUG]: Checking device /dev/sdb1
util.py[DEBUG]: Running command ['/sbin/blkid', '-c', '/dev/null', '/dev/sdb1'] with allowed return codes [0, 2] (shell=False, capture=True)
cc_disk_setup.py[DEBUG]: Device /dev/sdb1 has None None
cc_disk_setup.py[DEBUG]: Device /dev/sdb1 is cleared for formating
cc_disk_setup.py[DEBUG]: File system None will be created on /dev/sdb1
util.py[DEBUG]: Running command ['/bin/lsblk', '--pairs', '--output', 'NAME,TYPE,FSTYPE,LABEL', '/dev/sdb1', '--nodeps'] with allowed return codes [0] (shell=False, capture=True)
util.py[DEBUG]: Creating fs for /dev/disk/cloud/azure_resource took 0.008 seconds
util.py[WARNING]: Failed during filesystem operation#012Failed during disk check for /dev/sdb1#012Unexpected error while running command.#012Command: ['/bin/lsblk', '--pairs', '--output', 'NAME,TYPE,FSTYPE,LABEL', '/dev/sdb1', '--nodeps']#012Exit code: 32#012Reason: -#012Stdout: ''#012Stderr: 'lsblk: /dev/sdb1: not a block device\n'

** Affects: cloud-init
     Importance: Undecided
         Status: New

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Engineering Team, which is subscribed to cloud-init.
https://bugs.launchpad.net/bugs/1626243

Title:
  Cloud-init fails to write ext4 filesystem to Azure Ephemeral Drive

Status in cloud-init:
  New

Bug description:
  The symptom is similar to 1611074 but the cause is different. In this
  case it seems there is an error accessing /dev/sdb1 when lsblk is run,
  possibly because sgdisk isn't done creating the partition. The
  specific error message is "/dev/sdb1: not a block device." A simple
  wait and retry here may resolve the issue.

  util.py[DEBUG]: Running command ['/sbin/sgdisk', '-p', '/dev/sdb'] with allowed return codes [0] (shell=False, capture=True)
  cc_disk_setup.py[DEBUG]: Device partitioning layout matches
  util.py[DEBUG]: Creating partition on /dev/disk/cloud/azure_resource took 0.056 seconds
  cc_disk_setup.py[DEBUG]: setting up filesystems: [{'filesystem': 'ext4', 'device': 'ephemeral0.1', 'replace_fs': 'ntfs'}]
  cc_disk_setup.py[DEBUG]: ephemeral0.1 is mapped to disk=/dev/disk/cloud/azure_resource part=1
  cc_disk_setup.py[DEBUG]: Creating new filesystem.
  cc_disk_setup.py[DEBUG]: Checking /dev/sdb against default devices
  cc_disk_setup.py[DEBUG]: Manual request of partition 1 for /dev/sdb1
  cc_disk_setup.py[DEBUG]: Checking device /dev/sdb1
  util.py[DEBUG]: Running command ['/sbin/blkid', '-c', '/dev/null', '/dev/sdb1'] with allowed return codes [0, 2] (shell=False, capture=True)
  cc_disk_setup.py[DEBUG]: Device /dev/sdb1 has None None
  cc_disk_setup.py[DEBUG]: Device /dev/sdb1 is cleared for formating
  cc_disk_setup.py[DEBUG]: File system None will be created on /dev/sdb1
  util.py[DEBUG]: Running command ['/bin/lsblk', '--pairs', '--output', 'NAME,TYPE,FSTYPE,LABEL', '/dev/sdb1', '--nodeps'] with allowed return codes [0] (shell=False, capture=True)
  util.py[DEBUG]: Creating fs for /dev/disk/cloud/azure_resource took 0.008 seconds
  util.py[WARNING]: Failed during filesystem operation#012Failed during disk check for /dev/sdb1#012Unexpected error while running command.#012Command: ['/bin/lsblk', '--pairs', '--output', 'NAME,TYPE,FSTYPE,LABEL', '/dev/sdb1', '--nodeps']#012Exit code: 32#012Reason: -#012Stdout: ''#012Stderr: 'lsblk: /dev/sdb1: not a block device\n'

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