[Bug 1576341] Re: systemd in degraded state on startup in LXD containers

[Nish Aravamudan]

On 08.05.2017 [11:25:03 -0000], Balint Reczey wrote:
> >> 1.b i'd like another way to do that, but not sure what a better way would
> >> be.
> > 
> > Yeah, I spent some time looking at the CPC generater and it seems like
> > this is pretty hard-coded:
> > 
> > 999-cpc-fixes.chroot:
> > ## --------------
> > # for maverick and newer, use LABEL= for the '/' entry in fstab
> > if [ -n "${root_fs_label}" ]; then
> >    bl="[:blank:]"
> >    lstr="LABEL=${root_fs_label}"
> >    sed -i "s,^[^#${bl}]*\([${bl}]*/[${bl}].*\),${lstr}\1," "${rootd}/etc/fstab"
> > fi
> > cat > /etc/fstab << EOM
> > LABEL=cloudimg-rootfs / ext4 defaults 0 0
> > EOM
> 
> I think the cleanest solution would be providing images for containers
> without this invalid fstab entry.

I *think* containers and VMs use the same cloud image, so I don't think
bifurcating for this one change is reasonable.

> The second cleanest seems to be not starting
> systemd-remount-fs.service in containers, or at least not in lxc.

Except it's possible that a user might have other entries that should be
remounted, possibly? When, say, passing real disks into the container?

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https://bugs.launchpad.net/bugs/1576341

Title:
  systemd in degraded state on startup in LXD containers

Status in lvm2 package in Ubuntu:
  Confirmed
Status in lxd package in Ubuntu:
  Invalid
Status in open-iscsi package in Ubuntu:
  Fix Released
Status in systemd package in Ubuntu:
  Confirmed

Bug description:
  The ubuntu:xenial image shows 'degraded' state in lxd on initial boot.

  $ lxc launch xenial x1
  $ sleep 10
  $ lxc file pull x1/etc/cloud/build.info -
  build_name: server
  serial: 20160420-145324

  $ lxc exec x1 systemctl is-system-running
  degraded

  $ lxc exec x1 -- systemctl --state=failed
    UNIT                          LOAD   ACTIVE SUB    DESCRIPTION
  ● dev-hugepages.mount           loaded failed failed Huge Pages File System
  ● iscsid.service                loaded failed failed iSCSI initiator daemon (iscsid)
  ● open-iscsi.service            loaded failed failed Login to default iSCSI targets
  ● systemd-remount-fs.service    loaded failed failed Remount Root and Kernel File Systems
  ● systemd-sysctl.service        loaded failed failed Apply Kernel Variables
  ● lvm2-lvmetad.socket           loaded failed failed LVM2 metadata daemon socket
  ● systemd-journald-audit.socket loaded failed failed Journal Audit Socket

  LOAD   = Reflects whether the unit definition was properly loaded.
  ACTIVE = The high-level unit activation state, i.e. generalization of SUB.
  SUB    = The low-level unit activation state, values depend on unit type.

  7 loaded units listed. Pass --all to see loaded but inactive units, too.
  To show all installed unit files use 'systemctl list-unit-files'.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: open-iscsi 2.0.873+git0.3b4b4500-14ubuntu3
  ProcVersionSignature: Ubuntu 4.4.0-18.34-generic 4.4.6
  Uname: Linux 4.4.0-18-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  Date: Thu Apr 28 17:28:04 2016
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
  SourcePackage: open-iscsi
  UpgradeStatus: No upgrade log present (probably fresh install)

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