setup varnish

[diraol]

Setup varnish.

It should listen for requests on the port 6081, and only for localhost requests.

If the cache miss, then varnish should redirect it to 127.0.0.1:8080 (nginx will be listening on this port to redirect to HHVM).

[leonardofl]

Mostly done in 8f6fdeb.
One left concern: Varnish is listening 0.0.0.0 rather than localhost.
I tried to edit the /etc/default/varnish to change this, but according to netstat it did not work.

My attempt:
In /etc/default/varnish:

DAEMON_OPTS="-a localhost:6081 \
         -T localhost:6082 \
         -f /etc/varnish/default.vcl \
         -S /etc/varnish/secret \
         -s malloc,256m"

After the edition:

$sudo systemctl restart varnish
$ netstat -ntpl
tcp        0      0 0.0.0.0:6081            0.0.0.0:*               LISTEN      -

0.0.0.0 should be localhost or 127.0.0.1.

[leonardofl]

Obs: moreover, after editing the file, Varnish remains accessible from the host.

[diraol]

Here is a reference that seems to present a solution to the problem you described @leonardofl . http://www.writeyourcode.com/install-configure-varnish-apache-ubuntu-16-04/

Can you take a look at this? I'll keep going with the deploy for now. =)

[diraol]

This can also help! =)
https://www.digitalocean.com/community/tutorials/how-to-speed-up-your-drupal-7-website-with-varnish-4-on-ubuntu-14-04-and-debian-7

[leonardofl]

The first link did the trick! Tks!

But there is one more issue.
You had setup the /etc/varnish/default.vcl file, but since varnish was not restarted, it was not using this file.
My change implied in restarting Varnish, but Varnish was not starting because

Jan 12 21:18:25 default-ubuntu-1604 varnishd[17566]: Error: Cannot read -f file (/etc/varnish/default.vcl): Permission denied

So because this error I commented on the recipe the lines

link "/etc/varnish/default.vcl" do
  to "#{confs_base_folder}/etc.varnish.default.vcl"
end

It seems the owner or permissions of this file or link need some adjustment.

[leonardofl]

PS: I tried

template "#{confs_base_folder}/etc.varnish.default.vcl" do
  mode '666'
  # owner root
  source 'etc.varnish.default.vcl.erb'
end

but it did not work =/