1. Install docker sudo su - sudo apt update -y sudo apt install apt-transport-https ca-certificates curl software-properties-common curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add - sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu focal stable" apt-cache policy docker-ce sudo apt update -y sudo apt install docker-ce sudo systemctl status docker sudo systemctl enable docker sudo systemctl start docker sudo systemctl status docker docker --version 2. The Docker Compose file mkdir /opt/librespeed cd /opt/librespeed nano docker-compose.

dont use OpenSpeedTest the software does not work We will install an Open Source Self-Hosted SpeedTest server with Managed Database. 1. Prerequisites You will need an Ubuntu Server VM (We do provide instructions for Rocky Linux) Install the OpenSpeedTest software Set VM with Static IP Address (In my case 10.154.2.80) 2. Software source OpenSpeedTest Locate the download needed (64 Bit versions): Ubuntu Server : OpenSpeedTest-Server_2.1.8_amd64.deb Rocky Linux Server: OpenSpeedTest-Server_2.1.8.x86_64.rpm Raspberry Pi : OpenSpeedTest-Server_2.

1. Create a storage for portainer to persist data Create the volume that Portainer Server will use docker volume create portainer_data 2. Install Portainner in your Docker Container Then, download and install the Portainer Server container using Docker: # docker run -d -p 8000:8000 -p 9443:9443 --name portainer --restart=always -v /var/run/docker.sock:/var/run/docker.sock -v portainer_data:/data portainer/portainer-ce:latest docker run -d -p 9000:9000 -p 9443:9443 --name portainer --restart=always -v /var/run/docker.sock:/var/run/docker.sock -v portainer_data:/data portainer/portainer-ce:latest Open browser: localhost:9080/#!

1. Completely uninstall Docker from Ubuntu Linux Find what packages are installed dpkg -l | grep -i docker Remove Docker based on what packages were found sudo apt-get purge -y docker-engine docker docker.io docker-ce docker-ce-cli docker-compose-plugin sudo apt-get autoremove -y --purge docker-engine docker docker.io docker-ce docker-compose-plugin find docker sudo find / -name "*docker*" | grep doclker Found: /var/lib/docker sudo rm -rf /var/lib/docker sudo rm -rf ~/.docker/ 2. Installing Docker on Ubuntu server sudo su - sudo apt update -y sudo apt install apt-transport-https ca-certificates curl software-properties-common curl -fsSL https://download.

https://towardsdatascience.com/overview-of-ui-monitoring-tools-for-apache-kafka-clusters-9ca516c165bd Github https://github.com/obsidiandynamics/kafdrop Community Kafdrop - An Open-Source Kafka Web UI Downloading the JAR file To get to the latest release look at the right hand side of the GitHub page click on the link “Latest” Release : 4.0.1 Download the Jarfile kafdrop-4.0.1.jar On your server: sudo su - cd /opt wget https://github.com/obsidiandynamics/kafdrop/releases/download/4.0.1/kafdrop-4.0.1.jar Running from JAR java --add-opens=java.base/sun.nio.ch=ALL-UNNAMED \ -jar target/kafdrop-<version>.jar \ --kafka.brokerConnect=<host:port,host:port>,... Run this command from your Kafka server

1. Create Quarkus Project cd ~/Documents/workspace-quarkus/ quarkus create app za.co.nico:kafka-quarkus:1.0 ls -la cd kafka-quarkus/ tree 2. Add dependencies 2.1 Add Kafka Search for Kafka quarkus ext list --concise -i -s kafka Expect to find ✬ ArtifactId Extension Name ✬ quarkus-smallrye-reactive-messaging-kafka SmallRye Reactive Messaging - Kafka Connector Add kafka dependency quarkus extension add quarkus-smallrye-reactive-messaging-kafka 2.2 add json Search for json quarkus ext list --concise -i -s json Expect to find: ✬ ArtifactId Extension Name ✬ camel-quarkus-gson Camel Gson ✬ camel-quarkus-jackson Camel Jackson ✬ camel-quarkus-jolt Camel JOLT ✬ camel-quarkus-jq Camel JQ ✬ camel-quarkus-jslt Camel JSLT ✬ camel-quarkus-json-validator Camel JSON Schema Validator ✬ camel-quarkus-jsonata Camel JSONATA ✬ camel-quarkus-jsonb Camel JSON-B ✬ camel-quarkus-jsonpath Camel JSON Path ✬ quarkus-jackson Jackson ✬ quarkus-jsonb JSON-B ✬ quarkus-jsonp JSON-P ✬ quarkus-logging-json Logging JSON quarkus-logging-json Logging JSON Jackson ✬ quarkus-rest-client-jackson RESTEasy Classic's REST Client Jackson ✬ quarkus-rest-client-jsonb RESTEasy Classic's REST Client JSON-B ✬ quarkus-rest-client-reactive-jackson RESTEasy Reactive's REST Client Jackson ✬ quarkus-rest-client-reactive-jsonb RESTEasy Reactive's REST Client JSON-B ✬ quarkus-rest-client-reactive-kotlin-serialization RESTEasy Reactive's REST Client Kotlin Serialization ✬ quarkus-resteasy-jackson RESTEasy Classic Jackson ✬ quarkus-resteasy-jsonb RESTEasy Classic JSON-B ✬ quarkus-resteasy-reactive-jackson RESTEasy Reactive Jackson ✬ quarkus-resteasy-reactive-jsonb RESTEasy Reactive JSON-B ✬ quarkus-resteasy-reactive-kotlin-serialization RESTEasy Reactive Kotlin Serialization ✬ quarkus-smallrye-jwt SmallRye JWT ✬ quarkus-smallrye-jwt-build SmallRye JWT Build timefold-solver-quarkus-jackson Timefold Jackson timefold-solver-quarkus-jsonb Timefold JSON-B Removing quarkus-jackson Extension

We need to start using Kafka with KRaft it now uses that by default 1. You need Java Open JDK 17 installed https://youtu.be/Abo7d9SpWXg https://computingforgeeks.com/install-java-on-rocky-almalinux-9/#google_vignette sudo yum install java-11-openjdk -y 2. Download Kafka as root user sudo su - https://kafka.apache.org/downloads cd /opt wget https://downloads.apache.org/kafka/3.6.1/kafka_2.12-3.6.1.tgz ls -la Expect to find: kafka_2.12-3.6.1.tgz 3. Extract the tarball sudo tar xzf kafka_2.12-3.6.1.tgz ls -la Expect to find directory : kafka_2.12-3.6.1 4. Create User kafka If you installing Kafka on a dedicated server you need to create a Kafka user However if in your laptop or PC computer yo skip this step In my laptop the user is nickm

We need to start using Kafka with KRaft it now uses that by default 1. You need Java Open JDK installed https://youtu.be/Abo7d9SpWXg 2. you need to install Zookeeper sudo apt-get install zookeeperd sudo service zookeeper status # Check Zookeeper telnet localhost 2181 # at the Telnet prompt send: ruok Create zookeeper service sudo nano /etc/systemd/system/zookeeper.service Put in file: [Unit] Requires=network.target remote-fs.target After=network.target remote-fs.target [Service] Type=simple User=kafka ExecStart=/home/kafka/kafka/bin/zookeeper-server-start.sh /home/kafka/kafka/config/zookeeper.properties ExecStop=/home/kafka/kafka/bin/zookeeper-server-stop.sh Restart=on-abnormal [Install] WantedBy=multi-user.

1. Installing Quarkus on Linux using SdkMan 1.1 Install SDKMAN https://sdkman.io/ Click on Install Run This command: curl -s "https://get.sdkman.io" | bash # in the terminal expect to get: source "/home/nickm/.sdkman/bin/sdkman-init.sh" It is important to open a new terminal or tab in your terminal now Run these commands: source "/home/nickm/.sdkman/bin/sdkman-init.sh" # verify it sdk version expect to get: SDKMAN! script: 5.18.2 native: 0.4.6 1.2 Install Quarkus java -version #You need version 17 or above sdk install java x.

1. What is NTP (Network Time Protocol)? Standard protocol for time synchronization in computer networks.* Ensures accurate and consistent timekeeping across connected devices. Clock Synchronization: NTP synchronizes clocks on servers and devices. Mitigates issues related to time discrepancies in distributed systems. Precision and Accuracy: Facilitates precise timekeeping by adjusting clocks to a common reference. Crucial for various applications, including security, log management, and global coordination. 2. Why should we install NTP on our servers?