Openstack Metadata Processor Plugin

Openstack Metadata processor plugin appends metadata gathered from Openstack to metrics. When this plugin is loaded for the first time, it takes metadata from http://169.254.169.254/openstack/latest/meta_data.json. Later, it adds configured parameters from plugin.conf as tags to all metrics.

Usage

Let's download repository

git clone https://github.com/lawdt/metadata.git
cd metadata

And build plugin binary with name metadata

go build -o metadata cmd/main.go

You should be able to call plugin from telegraf now using execd processor plugin, add this to your telegraf.conf. Just replace paths with your real paths:

[[processors.execd]]
  command = ["path/to/metadata/binary", "--config", "path/to/plugin.conf"]

now, restart telegraf.

Advanced Plugin Configuration

To change the composition of metrics added as tags just edit plugin.conf and restart telegraf:

[[processors.metadata]]
  ## Available tags to attach to metrics:
  ## * uuid
  ## * project
  ## * owner
  ## * service_name
  ## * group
  ## * fqdn
  ## * hostname
  ## * name
  ## * availability_zone
  ## * project_id
  openstack_tags = [ "project", "availability_zone" ]

Full Example of plugin usage

Building example

git clone https://github.com/lawdt/metadata.git
cd metadata
go build -o metadata cmd/main.go

Installation example

mkdir -p /var/lib/telegraf/openstack
mv metadata /var/lib/telegraf/openstack/
mv plugin.conf /var/lib/telegraf/openstack/
chown -R telegraf:telegraf /var/lib/telegraf

Usage example

Edit /etc/telegraf/telegraf.conf Append project and availability_zone to metrics tags:

[[processors.metadata]]
  tags = [ "project", "availability_zone"]

now restart telegraf

systemctl restart telegraf

And now all metrics contain the specified tags. For example:

- cpu,hostname=localhost time_idle=42
+ cpu,hostname=localhost,project=webshop,availability_zone=primary time_idle=42