Disk Space Issues

To see if the LV already includes this extra space, check like this:

lvdisplay

As per the blog post you linked to, to add 10GB to your existing LV:

lvextend -L+10G /dev/turnkey/root

resize2fs /dev/turnkey/root

Thanks for replying Jeremy,

lvdisplay gets me this far. However, when I try lvextend, it tells me there's no disk space.

root@observium ~# lvdisplay
  --- Logical volume ---
  LV Path                /dev/turnkey/root
  LV Name                root
  VG Name                turnkey
  LV UUID                fVasNx-1wBB-g7aL-EiAp-LpvZ-C1WJ-yXJVw4
  LV Write Access        read/write
  LV Creation host, time tkldev, 2016-04-12 03:22:44 +0100
  LV Status              available
  # open                 1
  LV Size                17.00 GiB
  Current LE             4352
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           254:0

  --- Logical volume ---
  LV Path                /dev/turnkey/swap_1
  LV Name                swap_1
  VG Name                turnkey
  LV UUID                VaKvrS-no8T-61db-aJtp-Up4r-GuzE-49THBU
  LV Write Access        read/write
  LV Creation host, time tkldev, 2016-04-12 03:22:44 +0100
  LV Status              available
  # open                 2
  LV Size                512.00 MiB
  Current LE             128
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           254:1

root@observium ~# lvextend -L+10G /dev/turnkey/root
  /etc/lvm/archive/.lvm_observium_24181_951535469: write error failed: No
space left on device
  Volume group "turnkey" metadata archive failed.

Or is it actually complaining about being out of room in the current filesystem? And it can't write the extra config?! Now I look at it, that's the only thing that makes sense to me.

I'm guessing you probably know how to do that, but for others:

df -h

If that is the issue, then you shouldn't need to make much headroom. You only need enough space to update the config, cause the next step is to make the filesystem bigger! :) Unless you've run it recently or it's a fairly fresh install, emptying the package cache usually frees up quite a few MB:

apt-get clean

Thanks for the update:

root@observium ~# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/dm-0        17G   17G     0 100% /
udev             10M     0   10M   0% /dev
tmpfs           403M   41M  362M  11% /run
tmpfs          1006M     0 1006M   0% /dev/shm
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs          1006M     0 1006M   0% /sys/fs/cgroup
/dev/sda1       415M   31M  364M   8% /boot
tmpfs           202M     0  202M   0% /run/user/0
 

The /dev/dm-0 path looks suspicious to me!

I'll run apt-get clean to see if that help.

Finally, when I SSH into the console, I still have this message:

Welcome to Observium, TurnKey GNU/Linux 14.1 / Debian 8.4 Jessie

  System information (as of Tue Jun 27 15:53:22 2017)

    System load:  0.00               Memory usage:  31%
    Processes:    117                Swap usage:    0%
    Usage of /:   99.9% of 16.61GB   IP address for eth0:  10.10.11.48

Look me up next time you're in Tasmania, Australia and it's your shout! :)

After running apt-get clean I was finally able to run lvextend and then resize2fs

I've performed a reboot of the server, logged back in and hey presto!

Welcome to Observium, TurnKey GNU/Linux 14.1 / Debian 8.4 Jessie

  System information (as of Tue Jun 27 16:01:13 2017)

    System load:  5.53               Memory usage:  23%
    Processes:    270                Swap usage:    0%
    Usage of /:   17.3% of 95.35GB   IP address for eth0:  10.10.11.48

We're back in business!

Thanks a million Jeremy, how do I get a pint to you?

Jon