Just a follow up strings on the Varnish 5.2.1 api lib shows:

strings /lib64/libvarnishapi.so.1.0.6 | grep LIBVARNISHAPI
LIBVARNISHAPI_2.0
LIBVARNISHAPI_2.0

...so /lib64/libvarnishapi.so.1: version `LIBVARNISHAPI_1.0' will of course fail, but the merged pull request here: #134 seems to indicate this should work for 5.2, but I'm not sure how that's possible when 5.2 uses LIBVARNISHAPI_2.0 and the stackdriver agent is still looking for LIBVARNISHAPI_1.0

from collectd.

Just another follow up, I think the issue is that your version of the stackdriver varnish.so plugin is compiled against the wrong varnish libs. I extracted the varnish.so lib from this Fedora RPM, http://download-ib01.fedoraproject.org/pub/fedora/linux/updates/29/Everything/x86_64/Packages/c/collectd-varnish-5.8.1-1.fc29.x86_64.rpm,

and it works just fine with my Varnish 5.2.1 and appears to reference the correct lib LIBVARNISHAPI_2.0

from collectd.

I just confirmed. It looks like the varnish.so library deployed with stackdriver collectd is compiled against Varnish 3 or 4. I compiled it against Varnish 5 loaded as follows:

Add in the varnish 5 repo.

curl -s https://packagecloud.io/install/repositories/varnishcache/varnish5/script.rpm.sh | bash

Add varnish 5 and libraries needed for collectd compile...

yum -y update
&& yum -y install varnish varnish-devel varnish-libs varnish-libs-devel varnish-modules

Compile Collectd

cd /tmp
&& git clone https://github.com/stackdriver/collectd.git
&& cd collectd/
&& ./build.sh
&& ./configure --prefix=/opt/stackdriver/collectd --enable-varnish
&& make
&& make install
&& rm -rf /tmp/collectd
&& mv /opt/stackdriver/collectd/lib/collectd/varnish.so /root/build/varnish.so

and varnish.so is just fine. So its definitely the version of Varnish libs compiled against.

from collectd.

I'm glad you were able to solve the issue. Support for Varnish in our agent has been deprecated, so we won't be updating the plugin for Varnish 5. For more details, see https://cloud.google.com/monitoring/agent/plugins/varnish

from collectd.