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# Telemetry
Tools to collect telemetry from hICN forwarders.
## Introduction
The project contains two plugins for [collectd](https://github.com/collectd/collectd):
* vpp: to collect statistics for VPP
* vpp-hicn: to collect statistics for [hICN](https://github.com/FDio/hicn)
Currently the two plugins provide the following functionalities:
* vpp: statistics (rx/tx bytes and packets) for each available interface.
* vpp-hicn: statistics (rx/tx bytes and packets) for each available face.
## Quick start
From the code tree root:
```bash
cd telemetry
mkdir -p build
cd build
cmake .. -DCMAKE_INSTALL_PREFIX=/usr
make
sudo make install
```
## Using hICN collectd plugins
### Platforms
hICN collectd plugins have been tested in:
- Ubuntu 20.04 LTS
### Dependencies
Build dependencies:
VPP 22.02, Debian packages can be found on
[packagecloud](https://packagecloud.io/fdio/release/install):
- vpp
- libvppinfra-dev
- vpp-dev
- hicn-plugin-dev
- `collectd` and `collectd-dev`: `sudo apt install collectd collectd-dev libyajl-dev`
## Getting started
Collectd needs to be configured in order to use the hICN plugins.
To enable the plugins, add the following lines to `/etc/collectd/collectd.conf`:
```
LoadPlugin vpp
LoadPlugin vpp_hicn
```
Before running collectd, a vpp forwarder must be started. If the vpp-hicn plugin
is used, the hicn-plugin must be available in the vpp forwarder.
If you need the custom types that the two plugins define, they are present in
`telemetry/custom_types.db`. It is useful if you are using InfluxDB as it
requires the type database for multi-value metrics (see [CollectD protocol
support in
InfluxDB](https://docs.influxdata.com/influxdb/v1.7/supported_protocols/collectd/)).
## Plugin options
`vpp` and `vpp-hicn` have the same two options:
- `Verbose` enables additional statistics. You can check the sources to have an
exact list of available metrics.
- `Tag` tags the data with the given string. Useful for identifying the context
in which the data was retrieved in InfluxDB for instance. If the tag value is
`None`, no tag is applied.
### Example: storing statistics from vpp and vpp-hicn
We'll use the rrdtool and csv plugins to store statistics from vpp and vpp-hicn.
Copy the configuration below in a file called `collectd.conf` and move
it to `/etc/collectd`:
```
######################################################################
# Global #
######################################################################
FQDNLookup true
BaseDir "/var/lib/collectd"
Interval 1
# if you are using custom_types.db, you can specify it
TypesDB "/usr/share/collectd/types.db" "/etc/collectd/custom_types.db"
######################################################################
# Logging #
######################################################################
LoadPlugin logfile
<Plugin logfile>
LogLevel "info"
File "/var/log/collectd.log"
Timestamp true
PrintSeverity true
</Plugin>
######################################################################
# Plugins #
######################################################################
LoadPlugin csv
LoadPlugin rrdtool
LoadPlugin vpp
LoadPlugin vpp_hicn
######################################################################
# Plugin configuration #
######################################################################
<Plugin csv>
DataDir "/var/lib/collectd/csv" # the folder where statistics are stored in csv
StoreRates true
</Plugin>
<Plugin rrdtool>
DataDir "/var/lib/collectd/rrd" # the folder where statistics are stored in rrd
</Plugin>
<Plugin vpp>
Verbose true
Tag "None"
</Plugin>
<Plugin vpp_hicn>
Verbose true
Tag "None"
</Plugin>
```
Run vpp and collectd:
```
systemctl start vpp
systemctl start collectd
```
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