Kubeadm is a CLI tool with the explicit goal to bootstrap a minimum viable, Kubernetes specification conformant cluster. It expects nodes to be preconfigured, and upon using the CLI, it will install the Kubernetes components, create tokens, and join nodes together into a cluster. The documentation page explicitly states that it should serve for higher-level tools that will provide customization, monitoring and other environment-specific options. This article gives a concise overview about Kubeadm: supported architectures, installation, and upgrade process, and supported components.
Kubespray is a meta distribution with an impressive configurability and scalability. It can be used for various infrastructure types, on-premise or cloud, bare metal or VMs, and it provides fine-grained control about all aspects of the installation process. Also, a wide range and customizability for the control plane storage, CRI, CNI, and ingress is given. Kubespray uses the configuration management tool Ansible at its core and represents your Kubernetes cluster as complete and versioned infrastructure as code.
K3S is a lightweight Kubernetes distribution packed into one single binary. This binary provides a comfortable CLI to manage all aspects of the cluster: Create nodes, join nodes, rotate secrets, and even upgrading. This blog post contains a concise overview about the K3S distribution, and its installation and configuration options.
Kubernetes is the leading platform for running self-healing containerized applications with fine-granular configuration, access, and security settings. Working with a managed Kubernetes distribution practically for more than 2 years, I decided to prepare for the various certifications to facilitate my learning. What could be a better approach than to start exploring Kubernetes from scratch? Learning about the components and their interactions, see the various Kubernetes distributions and perform installations on on-premise or cloud infrastructure.
Your IOT home network consist of different sensor that provide data about the environment related to different aspects, such as temperature and humidity in the air, the current level of your heater, or other binary data. And interesting and versatile extension are motion sensors. When properly calibrated, meaning that they do not send false positives, they can be helpful in many ways: Detect presence of persons (or animals!) to trigger other sensors, controlling the light, start to play music, or well raise an alert.
A complete IOT stack running on a Raspberry Pi is an effective way to integrated different sensors for home automation. In the last articles, we learned how to manually add a temperature/humidity sensor to the home network. By using PlatformIO, we manually flash the sensor, then choose available library for interacting with a sensor, and adding additional libraries to communicate with MQTT and send correctly transformed JSON data. We have complete control over all these steps, and can configure every single character that the sensor outputs. In addition to this manual way, there are great frameworks to flash and install utility programs to sensors, and also great platforms that access several sensors and show the measurements graphically as well as giving you direct interaction with these sensors.
A complete IOT stack running on a Raspberry Pi is an effective way to integrated different sensors for home automation. In the last articles, we learned how to manually add a temperature/humidity sensor to the home network. By using PlatformIO, we manually flash the sensor, then choose available library for interacting with a sensor, and adding additional libraries to communicate with MQTT and send correctly transformed JSON data. We have complete control over all these steps, and can configure every single character that the sensor outputs. In addition to this manual way, there are great frameworks to flash and install utility programs to sensors, and also great platforms that access several sensors and show the measurements graphically as well as giving you direct interaction with these sensors.
In my blog series so far, we covered how to setup the essential tools for transforming and capturing IOT data: MQTT, NodeRed, and InfluxDB. Now we will use these tools to actively collect data. The first sensor to be added is the temperature and humidity sensor DHT22. Its connected to an ESP8266 board. To flash and program it, we will use PlatformIO.
In my IOT Stack, a Raspberry Pi with an external connected disk serves as a SAMBA server. Before installing the system, I wanted to see the performance differences of various disk, their read speed, and their local and remote, via SAMBA, write speed.
In this article, I show how to write a simple heartbeat script that runs regularly on your laptop, desktop computer or IOT device to signal that it is still operational. To store and process the data, we need an IOTstack consisting of MQTT, NodeRed and InfluxDB - see my earlier articles in the series. The device from which we measure the heartbeat needs to be able to run a Python script.
