[Bug 1493188] Re: "overlayfs" no longer exists

[Launchpad Bug Tracker]

This bug was fixed in the package cloud-utils - 0.27-0ubuntu25.2

---
cloud-utils (0.27-0ubuntu25.2) xenial; urgency=medium

  * debian/patches/lp-1493188-support-overlay-filesystem:
mount-image-callback: support 'overlay' filesystem type rather
than ubuntu specific 'overlayfs' (LP: #1493188)
  * debian/patches/lp-1630274-mount-overlay-first:
mount-image-callback: try mounting overlay rather than checking first
(LP: #1630274)

 -- Chad Smith   Fri, 04 Sep 2020 08:47:08
-0600

** Changed in: cloud-utils (Ubuntu Xenial)
   Status: Fix Committed => Fix Released

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Title:
  "overlayfs" no longer exists

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[Bug 1493188] Re: "overlayfs" no longer exists

[Chad Smith]

Extended the SRU verification test case to validate that expected 
changes are present in mount-image-callback which loop over "fstype in overlay 
overlayfs".

I can confirm both that proper bits are uploaded in any overlay fs is
functional using cloud-utils (0.27-0ubuntu25.2).


 Updated test script

#!/bin/bash

set -x

cat > install_hwe_kernel_and_overlay_root.sh  /dev/null
echo --- No overlayfs mounts on initial boot
expect_overlayfs_mounts 0
multipass transfer install_hwe_kernel_and_overlay_root.sh $VM:.
multipass exec $VM -- sudo bash ./install_hwe_kernel_and_overlay_root.sh
echo "--- confirm overlay overlayfs patch present in mount-image-callback"
fs_types=$(multipass exec $VM -- grep -c "for fstype in overlay overlayfs" 
/usr/bin/mount-image-callback)
[[ "1" = "$fs_types" ]] || echo "FAILURE: didn't find 'for fstype in overlay 
overlayfs'"
multipass exec $VM -- sudo sh -c "echo overlayroot=tmpfs:recurse=0 | sudo tee 
-a /etc/overlayroot.local.conf"
multipass restart $VM
echo "--- expect 1 overlayfs mounts because using HWE kernel"
multipass exec $VM -- cloud-init status --wait --long
expect_overlayfs_mounts 1
multipass exec $VM -- sudo sh -c "echo overlayroot=tmpfs:recurse=1 | sudo 
overlayroot-chroot tee /etc/overlayroot.local.conf"
multipass restart $VM
expect_overlayfs_mounts 1
multipass exec $VM -- grep overlay /etc/fstab || echo "FAIL: didn't find 
overlayroot"
multipass exec $VM -- grep success /run/initramfs/overlayroot.log || echo 
"FAIL: didn't find overlayroot"


### Xenial verification results
+ cat
+ VM=sru-1493188
+ RELEASE=xenial
+ multipass launch daily:xenial -n sru-1493188
Launched: sru-1493188   
+ multipass exec sru-1493188 -- cloud-init status --wait --long 
+ echo --- No overlayfs mounts on initial boot
--- No overlayfs mounts on initial boot
+ expect_overlayfs_mounts 0
+ expected_mounts=0
++ multipass exec sru-1493188 mount
++ grep overlay -c
+ overlay_mounts=0
+ [[ 0 = \0 ]]
+ echo 'SUCCESS: found 0 overlay mounts'
SUCCESS: found 0 overlay mounts
+ multipass transfer install_hwe_kernel_and_overlay_root.sh sru-1493188:.
+ multipass exec sru-1493188 -- sudo bash 
./install_hwe_kernel_and_overlay_root.sh
3.) Enable proposed, install HWE kernel and install overlayroot to show fix.
deb http://archive.ubuntu.com/ubuntu xenial-proposed main
Get:1 http://security.ubuntu.com/ubuntu xenial-security InRelease [109 kB]
Hit:2 http://archive.ubuntu.com/ubuntu xenial InRelease
Get:3 http://archive.ubuntu.com/ubuntu xenial-updates InRelease [109 kB]   
Get:4 http://security.ubuntu.com/ubuntu xenial-security/universe amd64 Packages 
[774 kB]
Get:5 http://security.ubuntu.com/ubuntu xenial-security/universe Translation-en 
[219 kB]
Get:6 http://security.ubuntu.com/ubuntu xenial-security/multiverse amd64 
Packages [8,236 B]
Get:7 http://security.ubuntu.com/ubuntu xenial-security/multiverse 
Translation-en [2,888 B]
Get:8 http://archive.ubuntu.com/ubuntu xenial-backports InRelease [107 kB] 
Get:9 http://archive.ubuntu.com/ubuntu xenial-proposed InRelease [260 kB]
Get:10 http://archive.ubuntu.com/ubuntu xenial/universe amd64 Packages [7,532 
kB]
Get:11 http://archive.ubuntu.com/ubuntu xenial/universe Translation-en [4,354 
kB]
Get:12 http://archive.ubuntu.com/ubuntu xenial/multiverse amd64 Packages [144 
kB]
Get:13 http://archive.ubuntu.com/ubuntu xenial/multiverse Translation-en [106 
kB]
Get:14 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages 
[1,880 kB]
Get:15 http://archive.ubuntu.com/ubuntu xenial-updates/universe amd64 Packages 
[1,195 kB]
Get:16 http://archive.ubuntu.com/ubuntu xenial-updates/universe Translation-en 
[349 kB]
Get:17 http://archive.ubuntu.com/ubuntu xenial-updates/multiverse amd64 
Packages [23.0 kB]
Get:18 http://archive.ubuntu.com/ubuntu xenial-updates/multiverse 
Translation-en [8,632 B]
Get:19 http://archive.ubuntu.com/ubuntu xenial-backports/main amd64 Packages 
[9,812 B]
Get:20 http://archive.ubuntu.com/ubuntu xenial-backports/main Translation-en 
[4,456 B]
Get:21 http://archive.ubuntu.com/ubuntu xenial-backports/universe amd64 
Packages [11.3 kB]
Get:22 http://archive.ubuntu.com/ubuntu xenial-backports/universe 
Translation-en [4,476 B]
Get:23 

[Bug 1493188] Re: "overlayfs" no longer exists

[Chad Smith]

While the test case run on xenial did show overlay properly mounted
across reboot. The generated deb doesn't contain the applied patches to
mount-image-callback per the upload changelog. Needs investigation
before claiming victory here.

** Tags removed: verification-done verification-done-xenial
** Tags added: verification-needed verification-needed-xenial

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Title:
  "overlayfs" no longer exists

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[Bug 1493188] Re: "overlayfs" no longer exists

[Chad Smith]

Validated using multipass and installing HWE kernel with the following
script:


test script:

#!/bin/bash
set -x

cat > setup_proposed_and_overlay_root.sh  /dev/null
multipass transfer setup_proposed_and_overlay_root.sh $VM:.
multipass exec $VM -- sudo bash ./setup_proposed_and_overlay_root.sh
multipass restart $VM
sleep 15
echo "--- still expect 0 overlayfs mounts because not using HWE kernel"
multipass exec $VM -- cloud-init status --wait --long
expect_overlayfs_mounts 0
echo "--- Install HWE kernel"
multipass exec $VM -- sudo apt-get install --install-recommends 
linux-generic-hwe-16.04  -y | grep linux-image
multipass restart $VM
sleep 15
expect_overlayfs_mounts 1
exit 0


=== Verification output on xenial 

+ cat
+ VM=sru-1493188
+ RELEASE=xenial
+ multipass launch daily:xenial -n sru-1493188
Launched: sru-1493188   
+ expect_overlayfs_mounts 0 
+ expected_mounts=0
++ multipass exec sru-1493188 mount
++ grep overlay -c
+ overlay_mounts=0
+ [[ 0 = \0 ]]
+ echo 'SUCCESS: found 0 overlay mounts'
SUCCESS: found 0 overlay mounts
+ multipass exec sru-1493188 -- cloud-init status --wait --long
+ multipass transfer setup_proposed_and_overlay_root.sh sru-1493188:.
+ multipass exec sru-1493188 -- sudo bash ./setup_proposed_and_overlay_root.sh
deb http://archive.ubuntu.com/ubuntu xenial-proposed main
Hit:1 http://archive.ubuntu.com/ubuntu xenial InRelease
Get:2 http://archive.ubuntu.com/ubuntu xenial-updates InRelease [109 kB]
Get:3 http://archive.ubuntu.com/ubuntu xenial-backports InRelease [107 kB]
Get:4 http://archive.ubuntu.com/ubuntu xenial-proposed InRelease [260 kB]
Get:5 http://archive.ubuntu.com/ubuntu xenial/universe amd64 Packages [7,532 kB]
Get:6 http://archive.ubuntu.com/ubuntu xenial/universe Translation-en [4,354 kB]
Get:7 http://archive.ubuntu.com/ubuntu xenial/multiverse amd64 Packages [144 kB]
Get:8 http://archive.ubuntu.com/ubuntu xenial/multiverse Translation-en [106 kB]
Get:9 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages 
[1,880 kB]
Get:10 http://archive.ubuntu.com/ubuntu xenial-updates/universe amd64 Packages 
[1,195 kB]
Get:11 http://archive.ubuntu.com/ubuntu xenial-updates/universe Translation-en 
[349 kB]
Get:12 http://archive.ubuntu.com/ubuntu xenial-updates/multiverse amd64 
Packages [23.0 kB]
Get:13 http://archive.ubuntu.com/ubuntu xenial-updates/multiverse 
Translation-en [8,632 B]
Get:14 http://archive.ubuntu.com/ubuntu xenial-backports/main amd64 Packages 
[9,812 B]
Get:15 http://archive.ubuntu.com/ubuntu xenial-backports/main Translation-en 
[4,456 B]
Get:16 http://archive.ubuntu.com/ubuntu xenial-backports/universe amd64 
Packages [11.3 kB]
Get:17 http://archive.ubuntu.com/ubuntu xenial-backports/universe 
Translation-en [4,476 B]
Get:18 http://archive.ubuntu.com/ubuntu xenial-proposed/main amd64 Packages 
[80.1 kB]
Get:19 http://archive.ubuntu.com/ubuntu xenial-proposed/main Translation-en 
[21.9 kB]
Get:20 http://security.ubuntu.com/ubuntu xenial-security InRelease [109 kB]
Get:21 http://security.ubuntu.com/ubuntu xenial-security/universe amd64 
Packages [774 kB]
Get:22 http://security.ubuntu.com/ubuntu xenial-security/universe 
Translation-en [219 kB]
Get:23 http://security.ubuntu.com/ubuntu xenial-security/multiverse amd64 
Packages [8,236 B]
Get:24 http://security.ubuntu.com/ubuntu xenial-security/multiverse 
Translation-en [2,888 B]
Fetched 17.3 MB in 8s (2,059 kB/s) 
Reading package lists... Done
overlayroot is already the newest version (0.27ubuntu1.6).
  cloud-utils-euca shunit2 wodim cdrkit-doc debootstrap bsd-mailx | mailx
  cloud-image-utils cloud-utils distro-info genisoimage libaio1
Get:18 http://archive.ubuntu.com/ubuntu xenial-proposed/main amd64 cloud-utils 
all 0.27-0ubuntu25.2 [1,514 B]
Selecting previously unselected package cloud-utils.
Preparing to unpack .../cloud-utils_0.27-0ubuntu25.2_all.deb ...
Unpacking cloud-utils (0.27-0ubuntu25.2) ...
Setting up cloud-utils (0.27-0ubuntu25.2) ...
overlayroot=tmpfs
+ multipass restart sru-1493188
+ sleep 15 

[Bug 1493188] Re: "overlayfs" no longer exists

[Brian Murray]

Hello 宋文武, or anyone else affected,

Accepted cloud-utils into xenial-proposed. The package will build now
and be available at https://launchpad.net/ubuntu/+source/cloud-
utils/0.27-0ubuntu25.2 in a few hours, and then in the -proposed
repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, what testing has been
performed on the package and change the tag from verification-needed-
xenial to verification-done-xenial. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-xenial. In either case, without details of your testing we will
not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Tags removed: verification-done
** Tags added: verification-needed verification-needed-xenial

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Title:
  "overlayfs" no longer exists

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[Bug 1493188] Re: "overlayfs" no longer exists

[Chad Smith]

** Changed in: cloud-utils (Ubuntu Xenial)
 Assignee: (unassigned) => Chad Smith (chad.smith)

** Changed in: cloud-utils (Ubuntu Xenial)
   Status: Confirmed => Fix Committed

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Title:
  "overlayfs" no longer exists

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[Bug 1493188] Re: "overlayfs" no longer exists

[Scott Moser]

** Description changed:

  === Begin SRU Template ===
  [Impact]
  The 16.10 kernel dropped a legacy kernel module alias that allowed usage of
  the 'overlay' filesystem via name 'overlayfs'.  This broke overlayroot as
  it explicitly tried to to use 'overlayfs' by name in loading of modules and
  also in entry in /etc/fstab.
  
  Without this fix, overlayroot will simply not work on any upstream kernel
  or Ubuntu kernel of 16.10 (yakkety) or later.
  
  [Test Case]
  Note, not applying proposed as shown in step 3 below will recreate failure.
  
  1.) Start an instance of a cloud image.
  
  2.) get a suitable 4.8 kernel
  On 16.10 or later, this is already done.  On 16.04, we currently need to
  install the kernel team's PPA to get one.
  
  $ sudo apt-add-repository -y ppa:canonical-kernel-team/ppa
  $ sudo apt update -q && sudo apt install -y linux-virtual-hwe-16.04-edge 
http://archive.ubuntu.com/ubuntu $rel-proposed main" |
  $ sudo tee /etc/apt/sources.list.d/proposed.list
  $ sudo apt update -qy && sudo apt install -qy overlayroot http://bazaar.launchpad.net/~cloud-initramfs-tools/cloud-initramfs-tools/trunk/view/head:/overlayroot/scripts/init-bottom/overlayroot
  [2] 
http://bazaar.launchpad.net/~cloud-initramfs-tools/cloud-initramfs-tools/trunk/revision/115
  
  === End SRU Template ===
  
  As mentioned in LP: #1411294, it's now called 'overlay' instead of 
'overlayfs'.
  Ubuntu had patched the kernel for compatibility.
  
  The Ubuntu kernels as of 4.8 (16.10 kernel) and possibly a bit before no
  longer have a overlayfs module either.  Thus, this is now affecting
  yakkety.
  
  (The original reporter is @~gpo-9.)

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[Bug 1493188] Re: "overlayfs" no longer exists

[Robert C Jennings]

@chad.smith  I have used the cloud-utils in your ppa to build Xenial
maas-images on a bionic host to confirm that things are working now.

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[Bug 1493188] Re: "overlayfs" no longer exists

[Chad Smith]

Proposed branch is up for xenial handling overlayfs issues.

https://code.launchpad.net/~chad.smith/ubuntu/+source/cloud-utils/+git
/cloud-utils/+ref/upload-xenial-handle-missing-overlayfs

 The review has been approved and a test ppa is setup with cloud-utils
version 0.27-0ubuntu25.2  on Xenial which should resolve this issue.

If there is an opportunity to this this to confirm the fix, that would
be great:

Verification procedure:
sudo add-apt-repository ppa:chad.smith/cloud-utils-uploads -y
sudo apt-get update
sudo apt-get install cloud-utils=0.27-0ubuntu25.2

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[Bug 1493188] Re: "overlayfs" no longer exists

[Launchpad Bug Tracker]

** Merge proposal linked:
   
https://code.launchpad.net/~chad.smith/ubuntu/+source/cloud-utils/+git/cloud-utils/+merge/390318

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[Bug 1493188] Re: "overlayfs" no longer exists

[Robert C Jennings]

With the move to Bionic host kernels on the builders, the Xenial MAAS
images fail to build.  This is because cloud-utils mount-image-callback
remains unfixed in Xenial while the Bionic kernel does not have the
overlayfs kernel module.  The following patch at minimum is required in
Xenial:

https://bazaar.launchpad.net/~smoser/cloud-
utils/trunk.lp1493188/revision/303

Could we have this fix SRUed to Xenial please?

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[Bug 1493188] Re: "overlayfs" no longer exists

[Scott Moser]

this fix is present in cloud-utils 0.30

** Changed in: cloud-utils
   Status: Fix Committed => Fix Released

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[Bug 1493188] Re: "overlayfs" no longer exists

[Launchpad Bug Tracker]

This bug was fixed in the package cloud-initramfs-tools - 0.27ubuntu1.3

---
cloud-initramfs-tools (0.27ubuntu1.3) xenial; urgency=medium

  * sync with upstream at 0.32ubuntu1 (revno 129)
* overlayroot: fix overlayroot=crypt with newer initramfs-tools
  (LP: #1634310)
* overlayroot: support random seed from systemd systemd-random-seed.service
* cloud-initramfs-dyn-netconf: Further adjustments to support
  IPV6 and the new DEVICE6 and net6-DEVICE.conf files.  (LP: #1621615)
* overlayroot: support 'overlay' filesystem explicitly rather than
  relying on ubuntu specific kernel module 'overlayfs'.  (LP: #1493188)
* overlayroot: write debug to /run/initramfs not /dev/.initramfs but
  support writing to /dev/.initramfs if that is all there is. (LP: #1485752)
* overlayroot: fix overlayroot if recurse=0 was not provided.
  This fuctionality was lost since workdir support was added. (LP: #1619459)
* whitespace cleanup.

 -- Scott Moser   Mon, 28 Nov 2016 20:12:51 -0500

** Changed in: cloud-initramfs-tools (Ubuntu Xenial)
   Status: Fix Committed => Fix Released

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[Bug 1493188] Re: "overlayfs" no longer exists

[Scott Moser]

** Description changed:

  === Begin SRU Template ===
  [Impact]
  The 16.10 kernel dropped a legacy kernel module alias that allowed usage of
  the 'overlay' filesystem via name 'overlayfs'.  This broke overlayroot as
  it explicitly tried to to use 'overlayfs' by name in loading of modules and
  also in entry in /etc/fstab.
  
  Without this fix, overlayroot will simply not work on any upstream kernel
  or Ubuntu kernel of 16.10 (yakkety) or later.
  
  [Test Case]
  Note, not applying proposed as shown in step 3 below will recreate failure.
  
  1.) Start an instance of a cloud image.
  
  2.) get a suitable 4.8 kernel
- On 16.10 or later, this is already done.  On 16.04, we currently need to
- install the kernel team's PPA to get one.
+ On 16.10 or later, this is already done.  On 16.04, we currently need to
+ install the kernel team's PPA to get one.
  
- $ sudo apt-add-repository -y ppa:canonical-kernel-team/ppa
- $ sudo apt update -q && sudo apt install -y linux-virtual-hwe-16.04-edge 
http://archive.ubuntu.com/ubuntu $rel-proposed main" |
- $ sudo tee /etc/apt/sources.list.d/proposed.list
- $ sudo apt update -qy && sudo apt install -qy overlayroot http://archive.ubuntu.com/ubuntu $rel-proposed main" |
+ $ sudo tee /etc/apt/sources.list.d/proposed.list
+ $ sudo apt update -qy && sudo apt install -qy overlayroot http://bazaar.launchpad.net/~cloud-initramfs-tools/cloud-initramfs-tools/trunk/view/head:/overlayroot/scripts/init-bottom/overlayroot
  [2] 
http://bazaar.launchpad.net/~cloud-initramfs-tools/cloud-initramfs-tools/trunk/revision/115
  
  === End SRU Template ===
  
  As mentioned in LP: #1411294, it's now called 'overlay' instead of 
'overlayfs'.
  Ubuntu had patched the kernel for compatibility.
  
  The Ubuntu kernels as of 4.8 (16.10 kernel) and possibly a bit before no
  longer have a overlayfs module either.  Thus, this is now affecting
  yakkety.
  
  (The original reporter is @~gpo-9.)

** Tags removed: verification-needed
** Tags added: verification-done

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[Bug 1493188] Re: "overlayfs" no longer exists

[Scott Moser]

I've verified this on xenial using the steps provided in the test case above.
$ uname -r
4.8.0-28-generic
$ dpkg -S /boot/vmlinuz-$(uname -r)
linux-image-4.8.0-28-generic: /boot/vmlinuz-4.8.0-28-generic
$ dpkg-query --show overlayroot 
overlayroot 0.27ubuntu1.3

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  "overlayfs" no longer exists

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[Bug 1493188] Re: "overlayfs" no longer exists

[Chris Halse Rogers]

Hello 宋文武, or anyone else affected,

Accepted cloud-initramfs-tools into xenial-proposed. The package will
build now and be available at https://launchpad.net/ubuntu/+source
/cloud-initramfs-tools/0.27ubuntu1.3 in a few hours, and then in the
-proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: cloud-initramfs-tools (Ubuntu Xenial)
   Status: In Progress => Fix Committed

** Tags removed: verification-done

** Tags added: verification-needed

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Title:
  "overlayfs" no longer exists

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[Bug 1493188] Re: "overlayfs" no longer exists

[Scott Moser]

** Description changed:

+ === Begin SRU Template ===
+ [Impact]
+ The 16.10 kernel dropped a legacy kernel module alias that allowed usage of
+ the 'overlay' filesystem via name 'overlayfs'.  This broke overlayroot as
+ it explicitly tried to to use 'overlayfs' by name in loading of modules and
+ also in entry in /etc/fstab.
+ 
+ Without this fix, overlayroot will simply not work on any upstream kernel
+ or Ubuntu kernel of 16.10 (yakkety) or later.
+ 
+ [Test Case]
+ Note, not applying proposed as shown in step 3 below will recreate failure.
+ 
+ 1.) Start an instance of a cloud image.
+ 
+ 2.) get a suitable 4.8 kernel
+ On 16.10 or later, this is already done.  On 16.04, we currently need to
+ install the kernel team's PPA to get one.
+ 
+ $ sudo apt-add-repository -y ppa:canonical-kernel-team/ppa
+ $ sudo apt update -q && sudo apt install -y linux-virtual-hwe-16.04-edge 
http://archive.ubuntu.com/ubuntu $rel-proposed main" |
+ $ sudo tee /etc/apt/sources.list.d/proposed.list
+ $ sudo apt update -qy && sudo apt install -qy overlayroot http://bazaar.launchpad.net/~cloud-initramfs-tools/cloud-initramfs-tools/trunk/view/head:/overlayroot/scripts/init-bottom/overlayroot
+ [2] 
http://bazaar.launchpad.net/~cloud-initramfs-tools/cloud-initramfs-tools/trunk/revision/115
+ 
+ === End SRU Template ===
+ 
  As mentioned in LP: #1411294, it's now called 'overlay' instead of 
'overlayfs'.
  Ubuntu had patched the kernel for compatibility.
  
  The Ubuntu kernels as of 4.8 (16.10 kernel) and possibly a bit before no
  longer have a overlayfs module either.  Thus, this is now affecting
  yakkety.
  
- 
  (The original reporter is @~gpo-9.)

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[Bug 1493188] Re: "overlayfs" no longer exists

[Scott Moser]

** Changed in: cloud-initramfs-tools (Ubuntu Xenial)
   Status: Confirmed => In Progress

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[Bug 1493188] Re: "overlayfs" no longer exists

[Scott Moser]

** Changed in: cloud-initramfs-tools
   Status: Fix Committed => Fix Released

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[Bug 1493188] Re: "overlayfs" no longer exists

[Launchpad Bug Tracker]

This bug was fixed in the package cloud-utils - 0.29-0ubuntu4

---
cloud-utils (0.29-0ubuntu4) yakkety; urgency=medium

  * sync to trunk at revno 303
* mount-image-callback: support 'overlay' filesystem type rather
  than ubuntu specific 'overlayfs' (LP: #1493188)

 -- Scott Moser   Tue, 27 Sep 2016 21:20:58 -0400

** Changed in: cloud-utils (Ubuntu)
   Status: Confirmed => Fix Released

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  "overlayfs" no longer exists

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[Bug 1493188] Re: "overlayfs" no longer exists

[Scott Moser]

fix committed in cloud-utils trunk at revno 303.

** Changed in: cloud-utils
   Status: Confirmed => Fix Committed

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[Bug 1493188] Re: "overlayfs" no longer exists

[Launchpad Bug Tracker]

This bug was fixed in the package cloud-initramfs-tools - 0.29ubuntu1

---
cloud-initramfs-tools (0.29ubuntu1) yakkety; urgency=medium

  * overlayroot: support 'overlay' filesystem explicitly rather than
relying on ubuntu specific kernel module 'overlayfs'.  (LP: #1493188)

 -- Scott Moser   Fri, 23 Sep 2016 17:00:37 -0400

** Changed in: cloud-initramfs-tools (Ubuntu Yakkety)
   Status: Fix Committed => Fix Released

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[Bug 1493188] Re: "overlayfs" no longer exists

[Launchpad Bug Tracker]

** Branch linked: lp:~smoser/ubuntu/yakkety/cloud-utils/pkg

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[Bug 1493188] Re: "overlayfs" no longer exists

[Launchpad Bug Tracker]

** Branch linked: lp:cloud-utils

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  "overlayfs" no longer exists

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[Bug 1493188] Re: "overlayfs" no longer exists

[Launchpad Bug Tracker]

** Branch linked: lp:~smoser/cloud-utils/trunk.lp1493188

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  "overlayfs" no longer exists

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[Bug 1493188] Re: "overlayfs" no longer exists

[Scott Moser]

I've verified functional in yakkety in uvt-kvm.
Below 'ussh' is a wrapper arond uvt-kvm 
  https://gist.github.com/smoser/88a5a77ab0debf268b945d46314ea447
for reader purposes, it can be assumed that it operates like 'lxc exec'.  ie,
   ussh name command arguments
executed command and arguments on 'name'.


# make a new system.
name=sm-y1
uvt-kvm create $name release=yakkety

# enable proposed
$ ussh $name sudo sh -c 'echo "deb http://archive.ubuntu.com/ubuntu 
$(lsb_release -sc)-proposed main" >/etc/apt/sources.list.d/proposed.list && 
apt-get update -qy'
# install a package
ussh $name sudo apt-get install -qy overlayroot

# show.
$ ussh $name dpkg-query --show overlayroot
overlayroot 0.29ubuntu1

# enable overlayroot without recurse
$ ussh "$name" sh -c 'echo overlayroot=tmpfs:recurse=0 | sudo tee 
/etc/overlayroot.local.conf'

# reboot
$ ussh $name reboot

# show 
$ ussh $name grep overlay /proc/mounts
overlayroot / overlay 
rw,relatime,lowerdir=/media/root-ro,upperdir=/media/root-rw/overlay,workdir=/media/root-rw/overlay-workdir/_
 0 0

# turn on recurse
$ ussh "$name" sh -c 'echo overlayroot=tmpfs:recurse=1 | sudo 
overlayroot-chroot tee /etc/overlayroot.local.conf'

# reboot
$ ussh $name reboot

# show /proc/mounts
$ ussh "$name" grep overlay /proc/mounts
overlayroot / overlay 
rw,relatime,lowerdir=/media/root-ro,upperdir=/media/root-rw/overlay,workdir=/media/root-rw/overlay-workdir/_
 0 0
/media/root-ro/mnt /mnt overlay 
rw,relatime,lowerdir=/media/root-ro/mnt,upperdir=/media/root-rw/overlay/mnt,workdir=/media/root-rw/overlay-workdir/mnt
 0 0

$ ussh $name grep overlay /etc/fstab
#  This fstab is in an overlay. The real one can be found at
#  sudo overlayroot-chroot
/media/root-ro/ / overlay 
lowerdir=/media/root-ro/,upperdir=/media/root-rw/overlay/,workdir=/media/root-rw/overlay-workdir/_
 0 0
LABEL=UEFI /boot/efi vfat defaults 0 0 # overlayroot:fs-unsupported
/media/root-ro/mnt /mnt overlay 
lowerdir=/media/root-ro/mnt,upperdir=/media/root-rw/overlay/mnt,workdir=/media/root-rw/overlay-workdir/mnt
 0 0


# show kernel version
$ ussh $name uname -r
4.8.0-17-generic

# boot into normal root
$ ussh sm-y1 sudo sh -c 'overlayroot-chroot rm /etc/overlayroot.local.conf && 
reboot'


** Tags removed: verification-needed
** Tags added: verification-done

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[Bug 1493188] Re: "overlayfs" no longer exists

[Shuhao]

I can test this too if we build a copy for xenial for arm (raspi3).

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[Bug 1493188] Re: "overlayfs" no longer exists

[Steve Langasek]

Hello 宋文武, or anyone else affected,

Accepted cloud-initramfs-tools into yakkety-proposed. The package will
build now and be available at https://launchpad.net/ubuntu/+source
/cloud-initramfs-tools/0.29ubuntu1 in a few hours, and then in the
-proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
enable and use -proposed.  Your feedback will aid us getting this update
out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: cloud-initramfs-tools (Ubuntu Yakkety)
   Status: Confirmed => Fix Committed

** Tags added: verification-needed

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[Bug 1493188] Re: "overlayfs" no longer exists

[Scott Moser]

** Changed in: cloud-initramfs-tools
   Status: In Progress => Fix Committed

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[Bug 1493188] Re: "overlayfs" no longer exists

[Launchpad Bug Tracker]

** Branch linked: lp:cloud-initramfs-tools

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[Bug 1493188] Re: "overlayfs" no longer exists

[Scott Moser]

** Also affects: cloud-utils (Ubuntu Xenial)
   Importance: Undecided
   Status: New

** Also affects: cloud-initramfs-tools (Ubuntu Xenial)
   Importance: Undecided
   Status: New

** Changed in: cloud-initramfs-tools (Ubuntu Xenial)
   Status: New => Confirmed

** Changed in: cloud-initramfs-tools (Ubuntu Xenial)
   Importance: Undecided => Medium

** Changed in: cloud-utils (Ubuntu Xenial)
   Status: New => Confirmed

** Changed in: cloud-utils (Ubuntu Xenial)
   Importance: Undecided => Medium

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[Bug 1493188] Re: "overlayfs" no longer exists

[Scott Moser]

for some specific information on different ubuntu kernels:

-- latest kernel before 4.8 entered yakkety --
$ uname -r
4.4.0-9136-generic

$ grep overlay /lib/modules/4.4.0-9136-generic/modules.alias
alias overlayfs overlay
alias fs-overlayfs overlay
alias fs-overlay overlay

$ sudo modprobe -v overlayfs
insmod /lib/modules/4.4.0-9136-generic/kernel/fs/overlayfs/overlay.ko

$ lsmod | grep overlay
overlay

$ grep overlay /proc/filesystems
nodev   overlayfs
nodev   overlay

-- 4.8  kernel in yakkety --
$ uname -r
4.8.0-15-generic

$ grep overlay /lib/modules/4.8.0-15-generic/modules.alias
alias fs-overlay overlay

$ modprobe -v overlayfs
modprobe: FATAL: Module overlayfs not found in directory 
/lib/modules/4.8.0-15-generic

$ modprobe -v overlay
insmod /lib/modules/4.8.0-15-generic/kernel/fs/overlayfs/overlay.ko

$ grep overlay /proc/filesystems
nodev   overlay

-- 3.13 kernel (trusty GA) --
$ uname -r
3.13.0-96-generic

$ grep overlay /lib/modules/3.13.0-96-generic/modules.alias
alias fs-overlayfs overlayfs

$ sudo modprobe -v overlay
modprobe: FATAL: Module overlay not found.

$ sudo modprobe -v overlayfs 
insmod /lib/modules/3.13.0-96-generic/kernel/fs/overlayfs/overlayfs.ko 

$ grep overlay /proc/filesystems 
nodev   overlayfs

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[Bug 1493188] Re: "overlayfs" no longer exists

[Scott Moser]

** Description changed:

  As mentioned in LP: #1411294, it's now called 'overlay' instead of 
'overlayfs'.
  Ubuntu had patched the kernel for compatibility.
  
+ The Ubuntu kernels as of 4.8 (16.10 kernel) and possibly a bit before no
+ longer have a overlayfs module either.  Thus, this is now affecting
+ yakkety.
+ 
+ 
  (The original reporter is @~gpo-9.)

** Changed in: cloud-initramfs-tools
 Assignee: (unassigned) => Scott Moser (smoser)

** Changed in: cloud-initramfs-tools
   Status: Confirmed => In Progress

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[Bug 1493188] Re: "overlayfs" no longer exists

[Robie Basak]

** Summary changed:

- overlayroot doesn't work with vanilla kernel
+ "overlayfs" no longer exists

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