rpistat

Web-Service to collect system usage statistics.

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• category: Application
• copyright: 2022-2024 Nicola Asuni - Tecnick.com LTD
• license: LICENSE
• cvs: https://github.com/tecnickcom/rpistat

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TOC

• Description
• Documentation
  • public
    • General
• Development
• Deployment

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Description

Web-Service to collect system usage statistics.

This project was started to collect system usage statistics from a remote Raspberry PI 4 but it can be compiled and used with other systems too.

The statistics are exposed both via the /stats Web API endpoint and Prometheus metrics at /metrics.

An HomeAssistant sensor and template to collect those metrics can be found in the resources/HomeAssistant/ directory.

REST API Example:

curl 192.168.1.2:65501/stats

{

      "datetime": "2023-06-27T07:03:54Z",
      "timestamp": 1687849434569669934,
      "hostname": "rpi4",
      "uptime": 680189000000000,
      "memory_total": 1005973504,
      "memory_free": 587198464,
      "memory_used": 418775040,
      "memory_usage": 0.41628833993623754,
      "load_1m": 0,
      "load_5m": 0,
      "load_15m": 0,
      "temperature_cpu": 44.303,
      "disk_total": 31109140480,
      "disk_free": 27586793472,
      "disk_used": 3522347008,
      "disk_usage": 0.11322546858099501,
      "network": [
            {
                  "nic": "eth0",
                  "rx": 163621268,
                  "tx": 113155073
            },
            {
                  "nic": "wlan0",
                  "rx": 8225055,
                  "tx": 1327982
            },
            {
                  "nic": "eth1",
                  "rx": 24906794,
                  "tx": 18615044
            }
      ]

}

HomeAssistant Screenshot

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Documentation

• public
  • General
    General project documentation
    • GitHup project page

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Development

TOC

• Style and Conventions
• Requirements
• Quick Start
• Running all tests
• Documentation
• Usage
• Configuration
• Examples
• Logs
• Metrics
• Profiling
• OpenAPI
• Docker

Style and Conventions

For the general style and conventions, please refer to external documents: https://github.com/uber-go/guide/blob/master/style.md

Requirements

• check-jsonschema to check the validity of the JSON configuration files against the JSON schema.

sudo pip install --upgrade check-jsonschema

Developers' Quick Start

To quickly get started with this project, follow these steps:

1. Ensure you ahev installed the latest Go version and Python3 for some extra tests.
2. Clone the repository: git clone https://github.com/tecnickcom/rpistat.git.
3. Change into the project directory: cd rpistat.
4. Install the required dependencies and test everything: DEVMODE=LOCAL make x.

Now you are ready to start developing with rpistat!

This project includes a Makefile that allows you to test and build the project in a Linux-compatible system with simple commands.
All the artifacts and reports produced using this Makefile are stored in the target folder.

Alternatively, everything can be built inside a Docker container using the command make dbuild that uses the environment defined at resources/docker/Dockerfile.dev.

To see all available options:

make help

Running all tests

Before committing the code, please check if it passes all tests using

make x

that is an alias for:

DEVMODE=LOCAL make format clean mod deps generate qa build docker dockertest

Documentation

The README.md documentation file is generated using the source templates in doc/src via make gendoc command.

To update links and common information edit the file doc/src/config.yaml in YAML format. The schema of the configuration file is defined by the JSON schema: doc/src/config.schema.json. The document templates are defined by the *.tmpl files in gomplate-compatible format.

To regenerate the static documentation file:

make gendoc

Usage

rpistat [flags]

Flags:

-c, --configDir  string  Configuration directory to be added on top of the search list
-f, --logFormat  string  Logging format: CONSOLE, JSON
-o, --loglevel   string  Log level: EMERGENCY, ALERT, CRITICAL, ERROR, WARNING, NOTICE, INFO, DEBUG

Examples

Once the application has being compiled with make build, it can be quickly tested:

target/usr/bin/rpistat -c resources/test/etc/rpistat

Logs

This program logs the log messages in JSON format:

{
	"level": "info",
	"timestamp": 1595942715776382171,
	"msg": "Request",
	"program": "rpistat",
	"version": "0.0.0",
	"release": "0",
    "hostname":"myserver",
	"request_id": "c4iah65ldoyw3hqec1rluoj93",
	"request_method": "GET",
	"request_path": "/uid",
	"request_query": "",
	"request_uri": "/uid",
	"request_useragent": "curl/7.69.1",
	"remote_ip": "[::1]:36790",
	"response_code": 200,
	"response_message": "OK",
	"response_status": "success",
	"response_data": "avxkjeyk43av"
}

Logs are sent to stderr by default.

The log level can be set either in the configuration or as command argument (logLevel).

Metrics

This service provides Prometheus metrics at the /metrics endpoint.

Profiling

This service provides PPROF profiling data at the /pprof endpoint.

The pprof data can be analyzed and displayed using the pprof tool:

go get github.com/google/pprof

Example:

pprof -seconds 10 -http=localhost:8182 http://INSTANCE_URL:PORT/pprof/profile

OpenAPI

The rpistat API is specified via the OpenAPI 3 file: openapi.yaml.

The openapi file can be edited using the Swagger Editor:

docker pull swaggerapi/swagger-editor
docker run -p 8056:8080 swaggerapi/swagger-editor

and pointing the Web browser to http://localhost:8056

Docker

To build a Docker scratch container for the rpistat executable binary execute the following command:

make docker

Useful Docker commands

To manually create the container you can execute:

docker build --tag="tecnickcom/rpistatdev" .

To log into the newly created container:

docker run -t -i tecnickcom/rpistatdev /bin/bash

To get the container ID:

CONTAINER_ID=`docker ps -a | grep tecnickcom/rpistatdev | cut -c1-12`

To delete the newly created docker container:

docker rm -f $CONTAINER_ID

To delete the docker image:

docker rmi -f tecnickcom/rpistatdev

To delete all containers

docker rm $(docker ps -a -q)

To delete all images

docker rmi $(docker images -q)

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Deployment

After building the executable binary with make build:

• Copy the target/usr/bin/rpistat file into /usr/bin/rpistat in the target system.
• Set the file is executable with: sudo chmod +x /usr/bin/rpistat.
• Copy and edit the configuration file resources/etc/rpistat/config.json into /etc/rpistat/config.json in the target system.
• Copy the service file resources/etc/systemd/system/rpistat.service into /etc/systemd/system/rpistat.service in the target system and enable it:

sudo systemctl daemon-reload
sudo systemctl enable rpistat.service
sudo systemctl start rpistat.service

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