Permission problems

[potongct]

appvm start chromium
/nix/store/gr8x944bv3cwhk4i5751yhbqix1b16lh-nixos-vm
2020/07/14 22:20:52 internal error: process exited while connecting to monitor: 2020-07-14T21:20:52.185266Z qemu-system-x86_64: -blockdev {"node-name":"libvirt-1-format","read-only":false,"cache":{"direct":false,"no-flush":false},"driver":"qcow2","file":"libvirt-1-storage","backing":null}: Could not reopen file: Permission denied

[cab404]

appvm start chromium
/nix/store/gr8x944bv3cwhk4i5751yhbqix1b16lh-nixos-vm
2020/07/14 22:20:52 internal error: process exited while connecting to monitor: 2020-07-14T21:20:52.185266Z qemu-system-x86_64: -blockdev {"node-name":"libvirt-1-format","read-only":false,"cache":{"direct":false,"no-flush":false},"driver":"qcow2","file":"libvirt-1-storage","backing":null}: Could not reopen file: Permission denied

please, delete ~/appvm/.fake.qcow2

[potongct]

cd ~/appvm

ls -al
total 232
drwx------ 5 potong potong 4096 Jul 15 08:23 ./
drwxr-xr-x 43 potong potong 20480 Jul 14 13:04 ../
drwx------ 2 potong potong 4096 Jul 12 11:09 base/
drwx------ 2 potong potong 4096 Jul 12 11:04 chromium/
-r-------- 1 root root 196616 Jul 15 08:23 .fake.qcow2
drwx------ 2 potong potong 4096 Jul 12 11:09 gnused/
sudo rm .fake.qcow2
ls -al
total 36
drwx------ 5 potong potong 4096 Jul 15 08:24 ./
drwxr-xr-x 43 potong potong 20480 Jul 14 13:04 ../
drwx------ 2 potong potong 4096 Jul 12 11:09 base/
drwx------ 2 potong potong 4096 Jul 12 11:04 chromium/
drwx------ 2 potong potong 4096 Jul 12 11:09 gnused/
appvm start chromium
/nix/store/gr8x944bv3cwhk4i5751yhbqix1b16lh-nixos-vm
2020/07/15 08:25:09 internal error: process exited while connecting to monitor: 2020-07-15T07:25:08.964875Z qemu-system-x86_64: -blockdev {"node-name":"libvirt-1-format","read-only":false,"cache":{"direct":false,"no-flush":false},"driver":"qcow2","file":"libvirt-1-storage","backing":null}: Could not reopen file: Permission denied
ls -al
total 232
drwx------ 5 potong potong 4096 Jul 15 08:25 ./
drwxr-xr-x 43 potong potong 20480 Jul 14 13:04 ../
drwx------ 2 potong potong 4096 Jul 12 11:09 base/
drwx------ 2 potong potong 4096 Jul 12 11:04 chromium/
-r-------- 1 root root 196616 Jul 15 08:25 .fake.qcow2
drwx------ 2 potong potong 4096 Jul 12 11:09 gnused/
sudo chown potong:potong .fake.qcow2
ls -al
total 232
drwx------ 5 potong potong 4096 Jul 15 08:25 ./
drwxr-xr-x 43 potong potong 20480 Jul 14 13:04 ../
drwx------ 2 potong potong 4096 Jul 12 11:09 base/
drwx------ 2 potong potong 4096 Jul 12 11:04 chromium/
-r-------- 1 potong potong 196616 Jul 15 08:25 .fake.qcow2
drwx------ 2 potong potong 4096 Jul 12 11:09 gnused/
appvm start chromium
/nix/store/gr8x944bv3cwhk4i5751yhbqix1b16lh-nixos-vm
2020/07/15 08:25:55 internal error: process exited while connecting to monitor: 2020-07-15T07:25:55.396023Z qemu-system-x86_64: -blockdev {"node-name":"libvirt-1-format","read-only":false,"cache":{"direct":false,"no-flush":false},"driver":"qcow2","file":"libvirt-1-storage","backing":null}: Could not reopen file: Permission denied
ls -al
total 232
drwx------ 5 potong potong 4096 Jul 15 08:25 ./
drwxr-xr-x 43 potong potong 20480 Jul 14 13:04 ../
drwx------ 2 potong potong 4096 Jul 12 11:09 base/
drwx------ 2 potong potong 4096 Jul 12 11:04 chromium/
-r-------- 1 root root 196616 Jul 15 08:25 .fake.qcow2
drwx------ 2 potong potong 4096 Jul 12 11:09 gnused/

[cab404]

cd ~/appvm
ls -al
total 232
drwx------ 5 potong potong 4096 Jul 15 08:23 ./
drwxr-xr-x 43 potong potong 20480 Jul 14 13:04 ../
drwx------ 2 potong potong 4096 Jul 12 11:09 base/
drwx------ 2 potong potong 4096 Jul 12 11:04 chromium/
-r-------- 1 root root 196616 Jul 15 08:23 .fake.qcow2
drwx------ 2 potong potong 4096 Jul 12 11:09 gnused/
sudo rm .fake.qcow2
ls -al
total 36
drwx------ 5 potong potong 4096 Jul 15 08:24 ./
drwxr-xr-x 43 potong potong 20480 Jul 14 13:04 ../
drwx------ 2 potong potong 4096 Jul 12 11:09 base/
drwx------ 2 potong potong 4096 Jul 12 11:04 chromium/
drwx------ 2 potong potong 4096 Jul 12 11:09 gnused/
appvm start chromium
/nix/store/gr8x944bv3cwhk4i5751yhbqix1b16lh-nixos-vm
2020/07/15 08:25:09 internal error: process exited while connecting to monitor: 2020-07-15T07:25:08.964875Z qemu-system-x86_64: -blockdev {"node-name":"libvirt-1-format","read-only":false,"cache":{"direct":false,"no-flush":false},"driver":"qcow2","file":"libvirt-1-storage","backing":null}: Could not reopen file: Permission denied
ls -al
total 232
drwx------ 5 potong potong 4096 Jul 15 08:25 ./
drwxr-xr-x 43 potong potong 20480 Jul 14 13:04 ../
drwx------ 2 potong potong 4096 Jul 12 11:09 base/
drwx------ 2 potong potong 4096 Jul 12 11:04 chromium/
-r-------- 1 root root 196616 Jul 15 08:25 .fake.qcow2
drwx------ 2 potong potong 4096 Jul 12 11:09 gnused/
sudo chown potong:potong .fake.qcow2
ls -al
total 232
drwx------ 5 potong potong 4096 Jul 15 08:25 ./
drwxr-xr-x 43 potong potong 20480 Jul 14 13:04 ../
drwx------ 2 potong potong 4096 Jul 12 11:09 base/
drwx------ 2 potong potong 4096 Jul 12 11:04 chromium/
-r-------- 1 potong potong 196616 Jul 15 08:25 .fake.qcow2
drwx------ 2 potong potong 4096 Jul 12 11:09 gnused/
appvm start chromium
/nix/store/gr8x944bv3cwhk4i5751yhbqix1b16lh-nixos-vm
2020/07/15 08:25:55 internal error: process exited while connecting to monitor: 2020-07-15T07:25:55.396023Z qemu-system-x86_64: -blockdev {"node-name":"libvirt-1-format","read-only":false,"cache":{"direct":false,"no-flush":false},"driver":"qcow2","file":"libvirt-1-storage","backing":null}: Could not reopen file: Permission denied
ls -al
total 232
drwx------ 5 potong potong 4096 Jul 15 08:25 ./
drwxr-xr-x 43 potong potong 20480 Jul 14 13:04 ../
drwx------ 2 potong potong 4096 Jul 12 11:09 base/
drwx------ 2 potong potong 4096 Jul 12 11:04 chromium/
-r-------- 1 root root 196616 Jul 15 08:25 .fake.qcow2
drwx------ 2 potong potong 4096 Jul 12 11:09 gnused/

Okay. Are you using master version?

[potongct]

I installed appvm as of the instructions in https://appvm.readthedocs.io/en/latest/installation.html
I used:

nix-env -if https://code.dumpstack.io/tools/appvm/archive/master.tar.gz

to install it and also:

nix-channel --add https://nixos.org/channels/nixos-20.03 nixpkgs
nix-channel --update

nix-channel --list
home-manager https://github.com/rycee/home-manager/archive/master.tar.gz
nixpkgs https://nixos.org/channels/nixos-20.03
appvm --help
usage: appvm [] [ ...]

Flags:
--help Show context-sensitive help (also try --help-long and --help-man).

Commands:
help [...]
Show help.

list
List applications

autoballoon []
Automatically adjust/reduce app vm memory

start []
Start application

stop
Stop application

drop
Remove application data

generate [] []
Generate appvm definition

search
Search for application

sync
Synchronize remote repos for applications

appvm --version
appvm: error: unknown long flag '--version', try --help

[cab404]

I installed appvm as of the instructions in https://appvm.readthedocs.io/en/latest/installation.html

what's your os?

[potongct]

cat /etc/os-release
NAME="Linux Mint"
VERSION="20 (Ulyana)"
ID=linuxmint
ID_LIKE=ubuntu
PRETTY_NAME="Linux Mint 20"
VERSION_ID="20"
HOME_URL="https://www.linuxmint.com/"
SUPPORT_URL="https://forums.ubuntu.com/"
BUG_REPORT_URL="http://linuxmint-troubleshooting-guide.readthedocs.io/en/latest/"
PRIVACY_POLICY_URL="https://www.linuxmint.com/"
VERSION_CODENAME=ulyana
UBUNTU_CODENAME=focal

Is there any other diagnostics I can retrieve?

[cab404]

Dunno yet)
Please, run echo 'remember_owner = 0' | tee -a /etc/libvirt/qemu.conf

[potongct]

echo 'remember_owner = 0' | tee -a /etc/libvirt/qemu.conf
tee: /etc/libvirt/qemu.conf: Permission denied
remember_owner = 0
ls -al /etc/libvirt/qemu.conf
-rw------- 1 root root 32372 Jul 12 09:45 /etc/libvirt/qemu.conf

[cab404]

oof
echo 'remember_owner = 0' | sudo tee -a /etc/libvirt/qemu.conf

[potongct]

I ran the following:

echo 'remember_owner = 0' | sudo tee -a /etc/libvirt/qemu.conf
remember_owner = 0

and then:

appvm start chromium
/nix/store/yfkc2fib1x416ixiqxcb65qinkg2dj6w-nixos-vm
2020/07/15 10:36:31 internal error: process exited while connecting to monitor: 2020-07-15T09:36:30.572294Z qemu-system-x86_64: -blockdev {"node-name":"libvirt-1-format","read-only":false,"cache":{"direct":false,"no-flush":false},"driver":"qcow2","file":"libvirt-1-storage","backing":null}: Could not reopen file: Permission denied

[cab404]

Can you send output of groups?

[potongct]

I believe I may have found the answer.

I had previously set user = 'potong' and group = 'kvm' (potong being my user name).

I reverted user = 'root' and group = 'root' and commented out the now appended remember_owner = 0

Then restarted libvirtd with systemctl restart libvirtd

appvm start chromium
/nix/store/yfkc2fib1x416ixiqxcb65qinkg2dj6w-nixos-vm

appvm list
Started VM:
chromium

Available VM:
chromium
gnused
appvm stop chromium

Started VM:

Available VM:
chromium
gnused

[potongct]

groups
potong adm cdrom sudo dip plugdev lpadmin sambashare libvirt libvirt-qemu

[cab404]

I believe I may have found the answer.

I had previously set user = 'potong' and group = 'kvm' (potong being my user name).

I reverted user = 'root' and group = 'root' and commented out the now appended remember_owner = 0

Then restarted libvirtd with systemctl restart libvirtd

the prolem is that with that everything in ~/appvm is owned by root :(