blkid output was above. and as I said in my first comment the entry in
/etc/fstab is wrong.
there is no LABEL=METADATA device. So 'mount' *should* fail, but I would have
expected it to exit non-zero.
I noticed just now that '/etc/fstab' has 'nofail' for that line. I
removed that, and it fails as you show and as expected. So the issue
here is really just 2 things
a.) the Canonical provided image has a bogus and confusing entry in /etc/fstab
b.) mount really should not exit '0' when explicitly asked to mount something
even if it has 'nofail'.
heres the info you asked for:
$ mount -l -vvv /var/lib/cloud/seed/config_drive; echo $?
0
$ blkid
/dev/xvda1: LABEL="cloudimg-bootfs" UUID="63ea63a7-f64c-493c-90d4-384adc196be9"
TYPE="ext3" PARTUUID="3276fc6f-01"
/dev/xvda2: LABEL="cloudimg-rootfs" UUID="82ca1e17-8bc2-4895-96bb-3c39e5863238"
TYPE="ext4" PARTUUID="3276fc6f-02"
/dev/xvdh: SEC_TYPE="msdos" LABEL="config-2" UUID="9796-932E" TYPE="vfat"
/dev/xvdb1: LABEL="SWAP-xvdb1" UUID="d51fcca0-6b10-4934-a572-f3898dfd8840"
TYPE="swap" PARTUUID="00025cdb-01"
$ cat /proc/mounts
sysfs /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0
udev /dev devtmpfs rw,nosuid,relatime,size=483664k,nr_inodes=120916,mode=755 0 0
devpts /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0
tmpfs /run tmpfs rw,nosuid,noexec,relatime,size=101204k,mode=755 0 0
/dev/xvda2 / ext4 rw,relatime,data=ordered 0 0
securityfs /sys/kernel/security securityfs rw,nosuid,nodev,noexec,relatime 0 0
tmpfs /dev/shm tmpfs rw,nosuid,nodev 0 0
tmpfs /run/lock tmpfs rw,nosuid,nodev,noexec,relatime,size=5120k 0 0
tmpfs /sys/fs/cgroup tmpfs ro,nosuid,nodev,noexec,mode=755 0 0
cgroup /sys/fs/cgroup/systemd cgroup
rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/lib/systemd/systemd-cgroups-agent,name=systemd
0 0
pstore /sys/fs/pstore pstore rw,nosuid,nodev,noexec,relatime 0 0
cgroup /sys/fs/cgroup/blkio cgroup rw,nosuid,nodev,noexec,relatime,blkio 0 0
cgroup /sys/fs/cgroup/cpu,cpuacct cgroup
rw,nosuid,nodev,noexec,relatime,cpu,cpuacct 0 0
cgroup /sys/fs/cgroup/cpuset cgroup rw,nosuid,nodev,noexec,relatime,cpuset 0 0
cgroup /sys/fs/cgroup/net_cls,net_prio cgroup
rw,nosuid,nodev,noexec,relatime,net_cls,net_prio 0 0
cgroup /sys/fs/cgroup/perf_event cgroup
rw,nosuid,nodev,noexec,relatime,perf_event 0 0
cgroup /sys/fs/cgroup/devices cgroup rw,nosuid,nodev,noexec,relatime,devices 0 0
cgroup /sys/fs/cgroup/pids cgroup rw,nosuid,nodev,noexec,relatime,pids 0 0
cgroup /sys/fs/cgroup/memory cgroup rw,nosuid,nodev,noexec,relatime,memory 0 0
cgroup /sys/fs/cgroup/hugetlb cgroup rw,nosuid,nodev,noexec,relatime,hugetlb 0 0
cgroup /sys/fs/cgroup/freezer cgroup rw,nosuid,nodev,noexec,relatime,freezer 0 0
debugfs /sys/kernel/debug debugfs rw,relatime 0 0
systemd-1 /proc/sys/fs/binfmt_misc autofs
rw,relatime,fd=37,pgrp=1,timeout=0,minproto=5,maxproto=5,direct 0 0
mqueue /dev/mqueue mqueue rw,relatime 0 0
none /proc/xen xenfs rw,relatime 0 0
fusectl /sys/fs/fuse/connections fusectl rw,relatime 0 0
/dev/xvda1 /boot ext3 rw,relatime,data=ordered 0 0
lxcfs /var/lib/lxcfs fuse.lxcfs
rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other 0 0
tmpfs /run/user/0 tmpfs rw,nosuid,nodev,relatime,size=101204k,mode=700 0 0
/dev/xvdh /mnt vfat
rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro
0 0
$ ls -altr /dev/disk/by-label/
total 0
drwxr-xr-x 4 root root 80 Dec 5 15:39 ..
drwxr-xr-x 2 root root 120 Dec 5 15:39 .
lrwxrwxrwx 1 root root 10 Dec 5 15:39 config-2 -> ../../xvdh
lrwxrwxrwx 1 root root 11 Dec 5 15:39 cloudimg-bootfs -> ../../xvda1
lrwxrwxrwx 1 root root 11 Dec 5 15:39 SWAP-xvdb1 -> ../../xvdb1
lrwxrwxrwx 1 root root 11 Dec 5 15:40 cloudimg-rootfs -> ../../xvda2
** Changed in: util-linux (Ubuntu)
Status: New => Confirmed
** Changed in: util-linux (Ubuntu)
Importance: Undecided => Low
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https://bugs.launchpad.net/bugs/1736556
Title:
mount can exit (success) when it fails
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