Install zerotier and use it with zeronsd on WSL

This is a guide how to install zerotier and use it with zeronsd on Windows Subsystem for Linux (WSL).

To install WSL run Windows Powershell as Administrator. As zerotier requires systemd I installed Debian:

PS C:\Windows\system32> wsl --install -d Debian
PS C:\Windows\system32> wsl --set-version Debian 2
PS C:\Windows\system32> wsl -l -v
  NAME      STATE           VERSION
* Debian    Stopped         2

Once installed I started Debian, updated its packages and added configuration to enable systemd:

jordana@dad-pc:~$ sudo apt update
jordana@dad-pc:~$ sudo apt upgrade
jordana@dad-pc:~$ sudo nano /etc/wsl.conf
[boot]
systemd=true

After reboot of Debian I had to install openssh server and reboot again to see systemd starting properly. 

jordana@dad-pc:~$ sudo apt install openssh-server

After this I have seen systemd starting properly so I could install zerotier with curl:

jordana@dad-pc:~$ systemctl list-unit-files --type=service
jordana@dad-pc:~$ sudo apt install curl
jordana@dad-pc:~$ curl -s https://install.zerotier.com | sudo bash
jordana@dad-pc:~$ sudo zerotier-cli join xxxxxxxxxxxxxxx
200 join OK

In order to configure local domain name resolution is routed to zeronsd, I had to disable that WSL generates /etc/resolv.conf in /etc/wsl.conf and add localhost to /etc/resolv.conf and reboot again.

jordana@dad-pc:~$ sudo nano /etc/wsl.conf
[network]
generateResolvConf = false
jordana@dad-pc:~$ sudo nano /etc/resolv.conf
nameserver localhost

Finally I could install dnsmasq and configure zeronsd local domain routed towards zeronsd server:

jordana@dad-pc:~$ sudo apt install dnsmasq
jordana@dad-pc:~$ sudo nano /etc/dnsmasq.conf
server=/zeronsd/192.168.193.1
server=8.8.8.8
jordana@dad-pc:~$ sudo systemctl restart dnsmasq

In order to let ansible to keep all apt packages latest I had to install python3 and configure sudo without password:

jordana@dad-pc:~$ sudo apt install python3
jordana@dad-pc:~$ sudo nano /etc/sudoers.d/nopasswd
jordana ALL=(ALL) NOPASSWD: ALL