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Varnish Cache monitoring with Netdata

Provides HTTP accelerator global, Backends (VBE) and Storages (SMF, SMA, MSE) statistics using varnishstat tool.

Note that both, Varnish-Cache (free and open source) and Varnish-Plus (Commercial/Enterprise version), are supported.

Requirements#

  • netdata user must be a member of the varnish group

Charts#

This module produces the following charts:

  • Connections Statistics in connections/s
  • Client Requests in requests/s
  • All History Hit Rate Ratio in percent
  • Current Poll Hit Rate Ratio in percent
  • Expired Objects in expired/s
  • Least Recently Used Nuked Objects in nuked/s
  • Number Of Threads In All Pools in pools
  • Threads Statistics in threads/s
  • Current Queue Length in requests
  • Backend Connections Statistics in connections/s
  • Requests To The Backend in requests/s
  • ESI Statistics in problems/s
  • Memory Usage in MiB
  • Uptime in seconds

For every backend (VBE):

  • Backend Response Statistics in kilobits/s

For every storage (SMF, SMA, or MSE):

  • Storage Usage in KiB
  • Storage Allocated Objects

Configuration#

Edit the python.d/varnish.conf configuration file using edit-config from the Netdata config directory, which is typically at /etc/netdata.

cd /etc/netdata # Replace this path with your Netdata config directory, if different
sudo ./edit-config python.d/varnish.conf

Only one parameter is supported:

instance_name: 'name'

The name of the varnishd instance to get logs from. If not specified, the host name is used.


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