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104 lines
2.7 KiB
Markdown
104 lines
2.7 KiB
Markdown
# Nix application VMs: security through virtualization
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Simple application VMs (hypervisor-based sandbox) based on Nix package manager.
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Uses one **read-only** /nix directory for all appvms. So creating a new appvm (but not first) is just about one minute.
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Currently optimized for full screen usage (but remote-viewer has ability to resize window dynamically without change resolution).
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## Dependencies
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$ sudo apt install golang virt-manager curl git
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$ sudo usermod -a -G libvirt $USER
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$ echo 'export GOPATH=$HOME/go' >> ~/.bash_profile
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$ echo 'export PATH=$PATH:$GOPATH/bin' >> ~/.bash_profile
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$ echo 'source ~/.bash_profile' >> ~/.bashrc
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$ source ~/.bash_profile
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You need to **relogin** if you install virt-manager (libvirt) first time.
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## Install Nix package manager
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$ sudo mkdir -m 0755 /nix && sudo chown $USER /nix
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$ curl https://nixos.org/nix/install | sh
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$ . ~/.nix-profile/etc/profile.d/nix.sh
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## Libvirt from user (required if you need access to shared files)
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$ echo user = "\"$USER\"" | sudo tee -a /etc/libvirt/qemu.conf
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$ sudo systemctl restart libvirtd
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## Install appvm tool
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$ go get github.com/jollheef/appvm
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## Update appvm tool
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$ go get -u github.com/jollheef/appvm
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## Generate resolution
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By default uses 1920x1080. If you need to regenerate `appvm/nix/monitor.nix`:
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$ $GOPATH/src/github.com/jollheef/appvm/generate-resolution.sh 3840 2160 > $GOPATH/src/github.com/jollheef/appvm/nix/monitor.nix
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Autodetection is a bash-spaghetti, so you need to check results. BTW it's just a X.org monitor section.
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## Run application
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$ appvm start chromium
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$ # ... long wait for first time, because we need to collect a lot of packages
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You can customize local settings in `$GOPATH/github.com/jollheef/appvm/nix/local.nix`.
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Default hotkey to release cursor: ctrl+alt.
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## Shared directory
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$ ls appvm/chromium
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foo.tar.gz
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bar.tar.gz
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## Close VM
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$ appvm stop chromium
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## Automatic ballooning
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Add this command:
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$ appvm autoballoon
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to crontab like that:
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$ crontab -l
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* * * * * /home/user/dev/go/bin/appvm autoballoon
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# App description
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$ cat nix/chromium.nix
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{pkgs, ...}:
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{
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imports = [
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<nixpkgs/nixos/modules/virtualisation/qemu-vm.nix>
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<nix/base.nix>
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];
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environment.systemPackages = [ pkgs.chromium ];
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services.xserver.displayManager.sessionCommands = "while [ 1 ]; do ${pkgs.chromium}/bin/chromium; done &";
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}
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For create new app you should add package name (search at https://nixos.org/nixos/packages.html) and path to binary (typically same as package name).
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## Defined applications (pull requests are welcome!)
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* chromium
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* thunderbird
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* tdesktop
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* evince
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* libreoffice
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* wire
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