MacStadium’s Post

Looking to containerize your applications on different operating systems and run them on an ESXi host? Check out this quick guide on how to install Docker on Windows Server 2022 and CentOS 9! With this guide, you can get your containers up and running in a virtualized environment in no time. #Docker #WindowsServer2022 #CentOS9 #Virtualization #ESXi #DevOps #Containerization

https://lnkd.in/g-5dH_Dr Easy way to install Virtual Box in your system. #codersarcade #virtualization

Demystifying the Linux Operating System 🚀 1️⃣ 𝗣𝗼𝘄𝗲𝗿 𝗢𝗻: Your journey begins when you hit that power button. The system wakes up, and the BIOS (Basic Input/Output System) takes the stage, checking that your hardware looks good. 2️⃣ 𝗠𝗮𝘀𝘁𝗲𝗿 𝗕𝗼𝗼𝘁 𝗥𝗲𝗰𝗼𝗿𝗱: BIOS hands off to the MBR on the hard disk, which knows exactly where to find the bootloader. 3️⃣ 𝗕𝗼𝗼𝘁𝗹𝗼𝗮𝗱𝗲𝗿: Think of the bootloader as the director, cueing the kernel's entrance. 4️⃣ 𝗞𝗲𝗿𝗻𝗲𝗹: Ah, the kernel – the core of the Linux operating system. It's the bridge between your hardware and the processes you run. 5️⃣ 𝗜𝗻𝗶𝘁𝗶𝗮𝗹 𝗥𝗔𝗠: The kernel gets loaded into memory, and your system starts to initialize with '/sbin/init'. 6️⃣ 𝗨𝘀𝗲𝗿 𝗦𝗽𝗮𝗰𝗲: Now we're in the user's domain, with the shell and graphical user interface (GUI) ready at your command. 🔁 𝗖𝘆𝗰𝗹𝗲 𝗼𝗳 𝗢𝗽𝗲𝗿𝗮𝘁𝗶𝗼𝗻: - 𝗨𝘀𝗲𝗿 𝗠𝗼𝗱𝗲: You interact with the system, asking it to run programs or commands. - 𝗦𝘆𝘀𝘁𝗲𝗺 𝗠𝗼𝗱𝗲: When you need something more privileged, like accessing hardware, the kernel steps in, managing the requests securely. 🛠️ 𝗞𝗲𝗿𝗻𝗲𝗹'𝘀 𝗧𝗼𝗼𝗹𝗯𝗼𝘅: - 𝗣𝗿𝗼𝗰𝗲𝘀𝘀 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁: Juggling all the tasks you've got running. - 𝗠𝗲𝗺𝗼𝗿𝘆 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁: Allocating space for your applications and data. - 𝗗𝗲𝘃𝗶𝗰𝗲 𝗗𝗿𝗶𝘃𝗲𝗿𝘀: Talking to your hardware, from your mouse to your USB drive. - 𝗦𝘆𝘀𝘁𝗲𝗺 𝗖𝗮𝗹𝗹𝘀: The requests made by programs to do something special. - 𝗙𝗶𝗹𝗲 𝗦𝘆𝘀𝘁𝗲𝗺 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁: Organizing and storing your precious files. 🧠 𝗕𝗿𝗮𝗶𝗻 𝗼𝗳 𝘁𝗵𝗲 𝗢𝗽𝗲𝗿𝗮𝘁𝗶𝗼𝗻: The kernel communicates with the CPU, memory, hard disk, and network to make sure your commands are executed and your programs are running smoothly. The beauty of Linux lies in its robust and transparent nature. Every process is a well-orchestrated dance between the user's commands and the kernel's management. It's this harmony that powers everything from your personal computer to the world's most demanding servers. Credit - Brij kishore Pandey 😁 #linux #server #devops #cloud

🚀 **Docker on Windows Woes? Ensure Virtualization in BIOS Settings!** 💻🔍 Hello LinkedIn Dev Community! 👋 Struggling with Docker on your Windows machine? If you encounter roadblocks, make sure to double-check if virtualization is enabled in your BIOS settings. 🤔 #Docker #WindowsDev #TechTroubleshoot 🛠️ **Simple Steps to Verify:** 1️⃣ Restart your machine and access BIOS settings. 2️⃣ Look for "Virtualization" or "VT-x" options. 3️⃣ Ensure it's ENABLED. This small tweak can make a big difference! Stay tuned for a smoother Docker experience. ⚙️🚢 #TechTips #WindowsTroubleshoot #DockerOnWindows Any questions or faced this issue before? Share your experiences in the comments! 👇 Let's troubleshoot together. 💡🛠️ #DevOps #TechSupport #DockerIssues

#Tart is a #native #virtualization #toolset to #build, #run and #manage #macOS and #Linux #virtual #machines on #Apple #Silicon. https://tart.run/

🐳 What is Docker using under the hood? Why everybody is using it? Well let’s find out❗ 🌌 𝐍𝐚𝐦𝐞𝐬𝐩𝐚𝐜𝐞𝐬 𝐚𝐧𝐝 𝐜𝐠𝐫𝐨𝐮𝐩𝐬 are two distinct Linux kernel features that are often used together to provide complete process isolation and resource management in containerization platforms like Docker. Let's explore how they work together: 1️⃣ 𝐍𝐚𝐦𝐞𝐬𝐩𝐚𝐜𝐞𝐬 𝐟𝐨𝐫 𝐈𝐬𝐨𝐥𝐚𝐭𝐢𝐨𝐧: Namespaces allow processes to have their own isolated view of certain system resources. For instance, a process running in a network namespace can have its own network interfaces and IP addresses that are separate from the host's network. Similarly, a process in a mount namespace can have its own filesystem hierarchy. 2️⃣ 𝐜𝐠𝐫𝐨𝐮𝐩𝐬 𝐟𝐨𝐫 𝐑𝐞𝐬𝐨𝐮𝐫𝐜𝐞 𝐌𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭: Control groups (cgroups) manage the allocation of system resources to processes or groups of processes. This ensures that no process consumes more resources than it's allowed, preventing resource contention and ensuring fair resource distribution. 3️⃣ 𝐂𝐨𝐦𝐛𝐢𝐧𝐢𝐧𝐠 𝐍𝐚𝐦𝐞𝐬𝐩𝐚𝐜𝐞𝐬 𝐚𝐧𝐝 𝐜𝐠𝐫𝐨𝐮𝐩𝐬: When used together, namespaces and cgroups create a powerful combination that allows containerization platforms to offer both isolation and resource management. Here's how they work hand in hand: 🔹  𝐈𝐬𝐨𝐥𝐚𝐭𝐢𝐨𝐧 𝐭𝐡𝐫𝐨𝐮𝐠𝐡 𝐍𝐚𝐦𝐞𝐬𝐩𝐚𝐜𝐞𝐬: Namespaces create the isolation boundary. Containers running in different namespaces can't directly see or interfere with each other's processes, network configurations, or filesystems. This isolation is vital for security and process separation. 🔹  𝐑𝐞𝐬𝐨𝐮𝐫𝐜𝐞 𝐌𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭 𝐰𝐢𝐭𝐡 𝐜𝐠𝐫𝐨𝐮𝐩𝐬: Within each namespace, processes might still compete for resources. This is where cgroups come in. They allow you to control the amount of CPU, memory, disk I/O, and other resources that a group of processes or a single process can use. By setting resource limits and priorities through cgroups, you ensure that one container cannot monopolize resources at the expense of others. In the context of 🐳 𝐃𝐨𝐜𝐤𝐞𝐫, when you run a Docker container, Docker creates a new namespace for the container. This namespace encapsulates the process view, network, filesystem, etc. Then, Docker utilizes cgroups to manage the resources allocated to the container, ensuring that the container adheres to the resource limits you've defined. #dockercontainer #linuxkernel #linux #containerization

[Tech Community] Test your Patches! A Staged Patching Solution with Azure Update Manager. A common challenge faced by most enterprise organizations who, hopefully, automate their operating systems patching cycles is to ensure that only the Windows and Linux packages updates that were tested in dev/test pre-production environments reach production machines. This article is for those readers who have been implementing automated, scheduled patching with Azure Update Manager and now want to put into practice a staged patching solution following good patching reliability practices. Keep tuned and read the solution my colleague @Wiszanyel Cruz and myself have... #azure https://lnkd.in/ga9qrDdK

VM vs Docker Operating System ---------------- Comprises: Applications OS Kernel Hardware Kernel communicates with hardware Applications run on Kernel layer The difference is there on the layer which is virtualized. Docker virtualizes the Applications Layer and uses the Kernel of the host. Virtual Box on the other hand has applications layer on its own kernel. So, it virtualizes its complete OS. It puts up its own Kernel on the Hardware. SIZE: The size of Docker is very small because they have to implement its own layer. FAST: Docker are faster than VMs. COMPATIBILTY: VM of any OS can run on any OS host. Older version than Windows 10 and MAC we cannot So, 1st step while installing is to check whether your hosts can actually run Docker nativally. Which means is the kernel comapatible with Docker images. So, a workaround is that you install a technology called Docker Toolbox which abstracts way the kernel to make it possible for your hosts to run differernt docker images.

#AWS Systems Manager now supports Ubuntu 23.04, Debian 12, MacOS 14, and SUSE SP5! Unlock full Node Management capabilities including Fleet Manager, Compliance, Inventory, and more. #CloudComputing #DevOps #AWSSystemsManager

#AzureDaily 🎉Exciting news! Experimental #WindowsContainers support for #BuildKit has been released in the new #Docker Preview! Great advancements include improved caching, better #Windows build performance, and updated container management 💻 Check it out now! #MicrosoftAzure #CloudComputing