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  • Escape Plato's Cave to build better IT infrastructure

    calendar Apr 9, 2023 · 6 min read · Unearned Uptime Design Patterns  ·
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    Let's be honest, most IT engineers are autodidacts out of necessity. Our industry isn't mature compared to most of the professions that exist today. Computer Science was first offered as a degree in 1962 in the US, and Network Science is flatly ancient, but generalized IT infrastructure support only became a schooled …


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  • Automate Cisco IOS/IOS-XE documentation with Ansible (with examples)

    calendar Mar 26, 2023 · 9 min read · Programmability Diagrams Ansible  ·
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    Note: This post integrates several automation tools at once. My objective is to provide some well-documented, concrete examples of executable Ansible Playbooks, D2 Diagrams, and best practice to illustrate ways to make good documentation easy. Note: All code examples in this blog post are structured in a format to be …


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  • Document Networks as Code with D2!

    calendar Mar 18, 2023 · 4 min read · Programmability Diagrams  ·
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    Let's do something a bit more stereotypical when we talk about IT diagramming - building Network Diagrams with D2. D2's OSS layout engines (Dagre, ELK) are both centered around hierarchical layouts, which was a bit part of why we needed to hack D2 to get vSphere diagrams to draw. Here, it quickly becomes our best …


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  • Document vSphere as Code with D2!

    calendar Mar 11, 2023 · 7 min read · Programmability Diagrams  ·
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    In a previous post we tested methods to illustrate documentation as-code with Terrastruct's D2 language. Documentation is good for infrastructure engineers in a variety of scenarios practically speaking, but we often forget the value of building consumer confidence. This may vary based on culture! My experiences are …


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  • Diagram as Code with D2!

    calendar Mar 4, 2023 · 5 min read · Programmability Diagrams  ·
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    Documentation is always important, but always takes too much time Ever had an issue where a new installation is completed, but there's just no time to update the ol' Visio diagrams? Manually composed diagrams always possess a certain art to them, but the hours per unit of documentation isn't always worthwhile …


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  • Enable ToFU (Trust on First Use) with OpenSSH

    calendar Feb 11, 2023 · 2 min read · Linux FOSS/Linux Programmability Ansible Information Security  ·
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    Ansible is a fantastic tool for Linux-based and NOS-based automation. Have you seen this error before? 1"changed": false, "msg": "Failed to connect to the host via ssh: Host key verification failed." When you use Ansible with SSH transport (as opposed to an API), you rely on the SSH key trust …


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  • Deploy vSphere VMs with Ansible!

    calendar Feb 4, 2023 · 3 min read · VMWare Home Lab vSphere FOSS/Linux Ansible Network Automation  ·
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    In a previous post, we covered how to create a virtual machine from a VM template in vSphere using Python and the REST API as an example of service-agnostic methods to invoke infrastructure resources. VMware's PowerCLI is a fantastic tool, but it's not for me. Tweaking or porting functionality from PowerCLI to other …


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  • Why Automate? VM Deployment with vSphere's REST API

    calendar Jan 5, 2023 · 7 min read · Linux VMWare Home Lab Python FOSS/Linux Jenkins Continuous Delivery JSON Programmability Jinja  ·
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    VMware introduced RESTful APIs with their vSphere 7.0 release train; migrating from the old MOB APIs is a welcome choice. REST clients provide a powerful tool for automating processes, but it's important to embody reliable practices when interacting with infrastructure. The neat thing about published and documented …


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  • What happens to packets with a VMware vSphere Distributed Switch?

    calendar Dec 26, 2022 · 4 min read · VMWare Home Lab Datacenter Networking Routing & Switching Studies  ·
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    Distributed Virtual Port-Groups (dvPGs) in vSphere are a powerful tool for controlling network traffic behavior. vSphere Distributed Switches (vDS) are non-transitive Layer 2 proxies and provide us the ability to modify packets in-flight in a variety of complex ways. Note: Cisco UCS implements something similar with …


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  • Security patches are available for VMware vCenter 8.0 - Let's try the new vCenter Lifecycle Manager!

    calendar Dec 17, 2022 · 2 min read · VMWare Home Lab Information Security vSphere  ·
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    Let's take a look at the new lifecycle management process for vCenter. The old process via the VAMI was easy to execute - the industry is upping the ante with automated pre- and post-testing. Cisco's NX-OS installer is another example - complex procedures (in Cisco's case, sequential PGA or microcode updates) invite …


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ENGYAK.co

A blog about IT

Disclaimer

The opinions expressed on this site are my own personal opinions and do not represent my employer’s view in any way.

Recent Posts

  • Escape Plato's Cave to build better IT infrastructure
  • Automate Cisco IOS/IOS-XE documentation with Ansible (with examples)
  • Document Networks as Code with D2!
  • Document vSphere as Code with D2!
  • Diagram as Code with D2!
  • Enable ToFU (Trust on First Use) with OpenSSH
  • Deploy vSphere VMs with Ansible!
  • Why Automate? VM Deployment with vSphere's REST API

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