Simple application VMs (hypervisor-based sandbox) based on Nix package manager.
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Nix application VMs: security through virtualization

Simple application VMs (hypervisor-based sandbox) based on Nix package manager.

Uses one read-only /nix directory for all appvms. So creating a new appvm (but not first) is just about one minute.

appvm screenshot

Dependencies

$ sudo apt install golang virt-manager curl git
$ sudo usermod -a -G libvirt $USER

$ echo 'export GOPATH=$HOME/go' >> ~/.bash_profile
$ echo 'export PATH=$PATH:$GOPATH/bin' >> ~/.bash_profile
$ echo 'source ~/.bash_profile' >> ~/.bashrc
$ source ~/.bash_profile

You need to relogin if you install virt-manager (libvirt) first time.

Install Nix package manager

$ sudo mkdir -m 0755 /nix && sudo chown $USER /nix
$ curl https://nixos.org/nix/install | sh
$ . ~/.nix-profile/etc/profile.d/nix.sh

Libvirt from user (required if you need access to shared files)

$ echo user = "\"$USER\"" | sudo tee -a /etc/libvirt/qemu.conf
$ sudo systemctl restart libvirtd

Install appvm tool

$ go get code.dumpstack.io/tools/appvm

Update appvm tool

$ go get -u code.dumpstack.io/tools/appvm

Search for applications

$ appvm search chromium

Generate new application

$ nix-channel --list
nix https://nixos.org/channels/nixos-unstable
$ appvm generate nix.firefox

Run application

$ appvm start chromium
$ # ... long wait for first time, because we need to collect a lot of packages

Synchronize remote repos for applications

$ appvm sync

You can customize local settings in ~/.config/appvm/nix/local.nix.

Default hotkey to release cursor: ctrl+alt.

Shared directory

$ ls appvm/chromium
foo.tar.gz
bar.tar.gz

Close VM

$ appvm stop chromium

Automatic ballooning

Add this command:

$ appvm autoballoon

to crontab like that:

$ crontab -l
* * * * * /home/user/dev/go/bin/appvm autoballoon