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psmqtt on FreeBSD

Using psmqtt on FreeBSD derivatives

alex@nass:~/ > uname -a
FreeBSD nass.lan 13.1-RELEASE-p2 FreeBSD 13.1-RELEASE-p2 n245412-484f039b1d0 TRUENAS amd64
alex@nass:~/psmqtt/ > freebsd-version
13.1-RELEASE-p2

Verifying Prerequisites

Python:

alex@nass:~/ > python3 --version
Python 3.9.14
alex@nass:~/psmqtt/ > python3 -m pip
/usr/local/bin/python3: No module named pip

To install pip this should work on FreeBSD:

alex@nass:~/psmqtt/ > sudo pkg install py39-pip
Password:
Updating local repository catalogue...
pkg: file:///usr/ports/packages/meta.txz: No such file or directory
repository local has no meta file, using default settings
pkg: file:///usr/ports/packages/packagesite.pkg: No such file or directory
pkg: file:///usr/ports/packages/packagesite.txz: No such file or directory
Unable to update repository local
Error updating repositories!

Instead in TrueNAS:

alex@nass:~/psmqtt/ > python -m ensurepip
Defaulting to user installation because normal site-packages is not writeable
Looking in links: /tmp/tmp943tnjaa
Requirement already satisfied: setuptools in /usr/local/lib/python3.9/site-packages (57.0.0)
Processing /var/tmp/tmp943tnjaa/pip-22.0.4-py3-none-any.whl
Installing collected packages: pip
  WARNING: The scripts pip3 and pip3.9 are installed in '/mnt/tank/home/alex/.local/bin' which is not on PATH.
  Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
Successfully installed pip-22.0.4
alex@nass:~/psmqtt/ > python3 -m pip --version
pip 22.0.4 from /mnt/tank/home/alex/.local/lib/python3.9/site-packages/pip (python 3.9)

Note that the above installation results in python libraries being installed into /mnt/tank/home/alex/.local/lib/python3.9/site-packages. When we run psmqtt as a root we will need to pass this location to psmqtt

Disks:

alex@nass:~/ > sudo smartctl --scan
/dev/ada0 -d atacam # /dev/ada0, ATA device
/dev/ada1 -d atacam # /dev/ada1, ATA device
/dev/ada2 -d atacam # /dev/ada2, ATA device
/dev/ses0 -d atacam # /dev/ses0, ATA device
/dev/ada3 -d atacam # /dev/ada3, ATA device
/dev/ada4 -d atacam # /dev/ada4, ATA device
/dev/ada5 -d atacam # /dev/ada5, ATA device
/dev/ses1 -d atacam # /dev/ses1, ATA device

Installation

git clone https://github.com/asokolsky/psmqtt.git
cd psmqtt
git switch typing
python3 -m pip install -r requirements.txt

First Run

I repeatedly run psmqtt-publish.py adding more and more tasks to identify discrepancies of psutil implementation:

  • psutil/sensors_temperatures/coretemp reports package and core temps, whereas on FreeBSD it reports core temps only.
  • note passing a location of the libraries installed in the previous step.
sudo python3 psmqtt-publish.py -vvv --pythonpath=/mnt/tank/home/alex/.local/lib/python3.9/site-packages mqtt \
    cpu_percent \
    virtual_memory/percent \
    'sensors_temperatures/coretemp/Core 0/current' \
    'sensors_temperatures/coretemp/Core 1/current' \
    'sensors_temperatures/coretemp/Core 2/current' \
    'sensors_temperatures/coretemp/Core 3/current' \
    smart/ada0/temperature \
    smart/ada1/temperature \
    smart/ada2/temperature \
    smart/ada3/temperature \
    smart/ada4/temperature

Running psmqtt as a Service

Modified psmqtt.conf:

  • specified my broker
  • set pythonpath
  • customized tasks
mqtt_broker = 'mqtt'
pythonpath = '/mnt/tank/home/alex/.local/lib/python3.9/site-packages'

schedule = {
    "every 1 minute": [
        "cpu_percent",
        "virtual_memory/percent",
	"sensors_temperatures/coretemp/Core 0/current",
	"sensors_temperatures/coretemp/Core 1/current",
	"sensors_temperatures/coretemp/Core 2/current",
	"sensors_temperatures/coretemp/Core 3/current",
	"smart/ada0/temperature",
	"smart/ada1/temperature",
	"smart/ada2/temperature",
	"smart/ada3/temperature",
	"smart/ada4/temperature",
    ],
    "every 60 minutes": "disk_usage/percent/|",  # slash replaced with vertical slash
    "every 3 hours": {
        "boot_time/{{x|uptime}}": "uptime",
    }
}