Ok I also found the answer to my search question:
https://forums.fogproject.org/topic/10036/api/2
The search syntax is slightly different to the news article.
So here would be an example command for completion:
curl -H 'fog-api-token: TOKEN' -H 'fog-user-token: TOKEN' -X GET http://FOG-PXE-SRV.mpi-dortmund.mpg.de/fog/host | jq '.hosts[] | select(.name == "HOSTNAME") | .name'
Thanks again for letting me do my inner monologue on your platform! 
Best,
Markus
Hello @sebastian-roth ,
So far I did not encounter any problems imaging and deploying resizable BTRFS images
However, I “only” tested simple examples, i.e., one SSD with EFI, BTRFS, SWAP partitioning.
But no problems with this setup.
However, more complex examples will follow soon and I will come back to you in case I encounter some problems.
@Sebastian-Roth I successfully finished the FOS kernel build including git
I started with the FOS 1.5.9 TAG. I already started the build before I read your message.
I installed the following packages:
CA Certificates <- Necessary for git https authentificationgitgit-crypt <- We use this, so I was happy it is as easy as checking it And things work great
Thank you for the guidance! It was actually very straight forward.
@george1421 Thank you for the input. As far as I understand it is required to have the FOG client up and running in order to deploy snapins? That actually might be something I will look into as well!
Actually during the FOS rebuild I had a similar idea, but instead of using snapins I was thinking of chrooting into the deployed system and run everything from there.
However, I am not sure if that would be a robust solution.
@Sebastian-Roth Sorry for that question, it turned out that I was just too impatient and did not wait long enough for the reboot to happen…
Rebooting works great now
On monday I will provide a short feedback if the wake-on-lan function is working properly
Have a great weekend!
Best,
Markus
Hello @george1421 ,
I looked into the error message and found an actual solution here: https://dnsmasq-discuss.thekelleys.org.narkive.com/3JlGMO6e/dhcp-proxy-problem
I needed to specify the dhcp-range for both subnets:
So instead of using:
dhcp-range=141.5.200.57,proxy
in the /etc/dnsmasq.d/ltsp.conf, I added the second subnet with the respective netmasks:
dhcp-range=141.5.200.255,proxy,255.255.240.0
dhcp-range=10.65.0.255,proxy,255.255.252.0
and everything seems to work now
Thank you so much for the help!
Hello @Sebastian-Roth and @george1421 ,
Thank you for all the information!
I am using FOG version 1.5.9.
Before I did any further testing I resolved my partition mess:
The allocation of the discs sectors was actually in the correct order, just the naming was messed up by a random allocation order during installation.
sda1 - EFI
sda2 - btrfs
sda3 - swap
However I still get a similar error with - No resizable partitions found):
(I looked at a lot of related threads and those people also posted screenshots of their problems and solutions. However, most of them are unavailable nowadays and therefore the thread not informative anymore. Is posting a screenshot here actually the best method in this case or do you prefer another solution?)
So I played around with btrfs resizing and came up with the following inside of the debug mode based on https://unix.stackexchange.com/questions/424758/resize-btrfs-filesystem-to-the-minimum-size-in-a-single-step
mount /dev/sda2 /mnt/bt
free_size_original=$(btrfs filesystem usage -b /mnt/bt | grep unallocated | grep -Eo '[0-9]+')
mult_val=0.95
free_size=$(echo "scale=0;(${mult_val}*${free_size_original})/1" | bc -l)
while ! btrfs filesystem resize -${free_size} /mnt/bt
do
if [[ ${mult_val} -le 0 ]]
then
break
else
mult_val=$(${mult_val} - 0.05)
fi
free_size=$(echo "scale=0;(${mult_val}*${free_size_original})/1" | bc -l)
done
To bring it back to full size it only needs a:
btrfs filesystem resize max /mnt/bt
I guess the tricky part now is to allocate the correct partition sizes after the shrink and before the max.
@george1421 I tried to use fthe fog command within the debug mode but only got:
And the next enter sends me back to the command line.
Best,
Markus
Hello everybody,
I needed to get myself into the FOS environment yesterday, BUT it works now (At least for my usecase 
)
Are you using a FOS Linux USB boot drive? I would expect to only see the “Unknown request type :: Null” when booted from a USB stick into FOS Linux without having a corresponding task scheduled on the FOG server. I also noticed that your kernel parameters are incomplete for a capture or deploy (which would also lead to that error message).
This happened because I used the normal Debug task and not the Capture - Debug task.
Using the Caputer - Debug made things work as you described them
@Tom-Elliott
I needed to make some minor changes to your suggested changes, but it was amazingly helpful to know which parts to look at
funcs.sh (based on what you send me):
--- funcs.sh_ori 2021-02-10 13:25:08.000000000 +0100
+++ funcs.sh 2021-02-11 09:08:31.660652070 +0100
@@ -255,15 +255,15 @@
fi
echo "Done"
;;
esac
;;
- extfs)
+ btrfs)
# Based on info from @mstabrin on forums.fogproject.org
if [[ ! -d /tmp/btrfs ]]; then
mkdir /tmp/btrfs >>/tmp/btfrslog.txt 2>&1
- if [[$? -gt 0 ]]; then
+ if [[ $? -gt 0 ]]; then
echo "Failed"
debugPause
handleError "Could not create /tmp/btrfs (${FUNCNAME[0]})\n Info: $(cat /tmp/btrfslog.txt)\n Args Passed: $*"
fi
fi
@@ -625,11 +625,11 @@
btrfs)
# Based on info from @mstabrin on forums.fogproject.org
# https://forums.fogproject.org/topic/15159/btrfs-postdownloadscript/3
if [[ ! -d /tmp/btrfs ]]; then
mkdir /tmp/btrfs >>/tmp/btfrslog.txt 2>&1
- if [[$? -gt 0 ]]; then
+ if [[ $? -gt 0 ]]; then
echo "Failed"
debugPause
handleError "Could not create /tmp/btrfs (${FUNCNAME[0]})\n Info: $(cat /tmp/btrfslog.txt)\n Args Passed: $*"
fi
fi
@@ -638,16 +638,18 @@
echo "Failed"
debugPause
handleError "Could not mount $part to /tmp/btrfs (${FUNCNAME[0]})\n Info: $(cat /tmp/btrfslog.txt)\n Args Passed: $*"
fi
local free_size_original=$(btrfs filesystem usage -b /tmp/btrfs | grep unallocated | grep -Eo '[0-9]+')
- local mult_val=0.95
- local free_size=$(echo "scale=0;(${mult_val}*${free_size_original})/1" | bc -l)
- while ! btrfs filesystem resize -${free_size} /tmp/btrfs; do
- [[ ${mult_val} -le 0 ]] && break || mult_val=$(${mult_val} - 0.05)
- free_size=$(echo "scale=0;(${mult_val}*${free_size_original})/1" | bc -l)
+ local fsize_pct=$(calculate_float "${percent}/100")
+ local mult_val=$(calculate_float "1-${fsize_pct}")
+ local free_size=$(calculate "${mult_val}*${free_size_original}")
+ while ! btrfs filesystem resize -${free_size} /tmp/btrfs >>/tmp/btrfslog.txt 2>&1; do
+ [[ $(echo "${mult_val} <= 0" | bc -l) -gt 0 ]] && break || mult_val=$(calculate_float "${mult_val}-0.05")
+ free_size=$(calculate "${mult_val}*${free_size_original}")
done
+ umount /tmp/btrfs >>/tmp/btrfslog.txt 2>&1
;;
*)
echo " * Not shrinking ($part $fstype)"
;;
esac
@@ -2421,5 +2423,8 @@
}
# Calculates information
calculate() {
echo $(awk 'BEGIN{printf "%.0f\n", '$*'}')
}
+calculate_float() {
+ echo $(awk 'BEGIN{printf "%f\n", '$*'}')
+}
Small changelog:
calculate_float function to make the float calculations workcalculate and calculate_float instead of my suggested bc -lpercent value as possible. Otherwise the mechanism would break if the percent value is large.fog.sh (based on what you send me):
--- fog.upload_ori 2021-02-10 13:22:20.000000000 +0100
+++ fog.upload 2021-02-11 08:44:34.415100613 +0100
@@ -42,11 +42,12 @@
part_number=0
for part in $parts; do
fsTypeSetting "$part"
getPartitionNumber "$part"
case $fstype in
- ntfs|extfs)
+ ntfs|extfs|btrfs)
+ #ntfs|extfs)
continue
;;
*)
fixed_size_partitions="$fixed_size_partitions:$part_number"
;;
Thank you for all the help
If you need more information from me, feel free to ask
@Sebastian-Roth It did containing
04/13/2021 11:58:30 Installer Settings successfully saved in /opt/fog-service/settings.json
04/13/2021 11:58:30 Middleware::Communication Download: http://fog-pxe-srv.XXX.de/fog/management/other/ca.cert.der