The hostname should be en.m.wikipedia.beta.wmflabs.org by the way - however it's also inaccessible.

DNS entry *.m.wikipedia.beta.wmflabs.org points to 208.80.153.143 which is bound to deployment-cache-mobile01. From https://wikitech.wikimedia.org/wiki/Special:NovaAddress

The varnish frontend (which listen on port 80) is not responding:

hashar@deployment-cache-mobile01:~$ sudo /etc/init.d/varnish-frontend status

• varnishd-frontend is not running

hashar@deployment-cache-mobile01:~$ sudo /etc/init.d/varnish status

• varnishd is running

hashar@deployment-cache-mobile01:~$

It is not loading anymore:

hashar@deployment-cache-mobile01:~$ sudo /etc/init.d/varnish-frontend start

• Starting HTTP accelerator [fail]

Message from VCC-compiler:
Could not load module netmapper
/usr/lib/x86_64-linux-gnu/varnish/vmods/libvmod_netmapper.so
/usr/lib/x86_64-linux-gnu/varnish/vmods/libvmod_netmapper.so: cannot open shared object file: No such file or directory
('zero.inc.vcl' Line 3 Pos 8)
import netmapper;

Running VCC-compiler failed, exit 1

VCL compilation failed
hashar@deployment-cache-mobile01:~$

varnish has to be manually upgraded on the beta cluster instances. I have ran apt-get dist-upgrade on all four instances (deployment-cache-text1 deployment-cache-upload04 deployment-cache-bits03 deployment-cache-mobile01 ) and rebooted them.

http://en.m.wikipedia.beta.wmflabs.org/ is back up :-]

Some varnish packages were not up-to-date and I had to purge some configuration files to have puppet regenerate them properly. All four instances now have puppet running without any error and varnish / varnishhtcpd are running on all of them.