** Changed in: cloud-init
Status: Fix Released => Confirmed
** Changed in: cloud-init (Ubuntu Xenial)
Status: Fix Released => Fix Committed
** Changed in: cloud-init (Ubuntu Xenial)
Status: Fix Committed => Confirmed
** Changed in: cloud-init (Ubuntu Zesty)
Status: Fix Released => Confirmed
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https://bugs.launchpad.net/bugs/1691489
Title:
fstab entries written by cloud-config may not be mounted
Status in cloud-init:
Confirmed
Status in cloud-init package in Ubuntu:
Confirmed
Status in cloud-init source package in Xenial:
Confirmed
Status in cloud-init source package in Yakkety:
Won't Fix
Status in cloud-init source package in Zesty:
Confirmed
Status in cloud-init source package in Artful:
Confirmed
Bug description:
=== Begin SRU Template ===
[Impact]
There is a race condition on a re-deployment of cloud-init on Azure
where /mnt will not get properly formatted or mounted. This is due to
"dirty" entries in /etc/fstab that cause a device to be busy when
cloud-init goes to format it. This shows itself usually as 'mkfs'
complaining that the device is busy. The cause is that systemd
starts an fsck and collides with cloud-init re-formatting the disk.
The problem can be seen other places but seemed to be most reproducible
and originally found on Azure.
[Test Case]
1.) Launch a Azure vm, ideally size L32S.
2.) Log in and verify the system properly mounted /mnt.
3.) Re-deploy the vm through the web ui and try again.
[Regression Potential]
Worst case scenario, these changes unnecessarily slow down boot and
do not fix the problem.
[Regression]
This SRU change caused bug 1717477.
[Other Info]
Upstream commit at
https://git.launchpad.net/cloud-init/commit/?id=1f5489c258
=== End SRU Template ===
As reported in bug 1686514, sometimes /mnt will not get mounted when
re-delpoying or stopping-then-starting a Azure vm of L32S. This is
probably a more generic issue, I suspect shown due to the speed of
disks on these systems.
Related bugs:
* bug 1686514: Azure: cloud-init does not handle reformatting GPT partition
ephemeral disks
* bug 1717477: cloud-init generates ordering cycle via After=cloud-init in
systemd-fsck
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