VSM: Could not get hold of varnishd, is it running?

[Dridi Boukelmoune]

On Sat, Jul 18, 2020 at 8:50 PM Meken <meken at meken.com> wrote:
>
> I am running Ubuntu 20.04.
>
> Recently upgrade of bash (apt update && apt upgrade) causes varnishlog/varnishtop/varnishtop not working:
> http://us.archive.ubuntu.com/ubuntu focal-updates/main amd64 bash amd64 5.0-6ubuntu1.1
>
> varnishstat
> .....
> VSM: Could not get hold of varnishd, is it running?
>
> Change to" sudo varnishstat" no use
>
> (but varnish is running)
>
> Tested on Varnish 6.2.1 also 6.4 master.
>
> So it is a bug of Ubuntu or Varnish?
>
> The only fix is to roll back to cancel the upgrade.
>
> ps aux | grep varnish
>
> root     2042323  0.0  0.0   9032   736 pts/0    S+   04:28   0:00 grep --color=auto varnish
>
> vcache   4055139  0.0  0.2  19148  5120 ?        SLs  Jul18   0:05 /usr/sbin/varnishd -j unix,user=vcache -F -a :80 -T localhost:6082 -f /etc/varnish/default.vcl -S /etc/varnish/secret -t 120 -p thread_pool_min=500 -p thread_pool_max=5000 -p thread_pool_stack=4M -p feature=+http2 -s malloc,20G -a [::1]:6086,PROXY
>
> vcache   4055284  0.0  4.1 4417784 84540 ?       SLl  Jul18   0:48 /usr/sbin/varnishd -j unix,user=vcache -F -a :80 -T localhost:6082 -f /etc/varnish/default.vcl -S /etc/varnish/secret -t 120 -p thread_pool_min=500 -p thread_pool_max=5000 -p thread_pool_stack=4M -p feature=+http2 -s malloc,20G -a [::1]:6086,PROXY
>
>
>
> Any idea? Thanks!

Can you share the output of the following commands?

    find /var/lib/varnish -type f | sort
    hostname

I suspect that your machine's hostname changed. If I'm correct, that
you can't rely on your machine's name for some reason, then it's your
job to consistently use a stable -n option across all varnish* programs.

Dridi