appvm/README.md

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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](screenshots/2018-07-05.png)
## 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