varnish4 grace-period 500 error

[Laurent Lavaud]

Hello,

I am using varnish 4.0.2 on a debian wheezy.

I use grace period and it works fine when the backend become non Healthy or unavailable.

But now i would like to serve stale content if my backend return a 500 error.

If i had only one vhost on the backend i could improve my probe check to detect the 500 error, but i have several vhosts and i can't probe all the vhost to see if it return a 200 code.

How i can achieve this ?


Regards.

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Laurent Lavaud
Administrateur Systèmes et Réseaux