Kubernetes 101 – Controllers

This is the second in a series of blog posts that will explain the different components of Kubernetes. Primarily because if I can explain it here, I’ll have learned it quite well myself. The first part is about Pods and can be found here. Why Controllers Before we answer the why, we ought to think about what a controller is. The atomic unit in Kubernetes is the pod. You can create and manage them manually.

CKA Exam Experience

On Wednesday 29th January I took my Certified Kubernetes Administrator exam, and after much baited breath (31 hours worth), I passed. This briefly covers my experience and the resources I used to get there. Lead Up In the weeks leading up to the exam I was becoming fairly proficient with Kubernetes but felt I needed a target to get to the required standard. So I booked my exam, on the basis that

Kubernetes 101 – Pods

This is the start of a series of blog posts that will explain the different components of Kubernetes. Primarily because if I can explain it here, I’ll have learned it quite well myself. Primer on Containers I think most people are at least aware of the existence of containers. Fundamentally they’re a construct used to make an application component self contained & portable. It holds all the libraries and binaries required to run the component.

Change of Direction

Sometimes at work priorities change. Right now for me that means that my vRA studying is going to need to go on the back burner while I step into some Kubernetes sized shoes. This is both exciting and frustrating at the same time. On the one hand, learning Kubernetes is very exciting and full of a lot of diverse technologies. While on the other, I’ve spent a great deal of time working with an old version of vRA just for the purposes of the VCAP-CMA exam.

VCAP-CMA Deploy – Objective 8.2

Disclaimer: These are my notes from studying for the 3V0-31.18 exam. If something doesn’t make sense, please feel free to reach out. The main goal for this objective is the security of vRealize Automation. Objective 8.2 – Secure a vRealize Automation deployment in accordance with the VMware hardening guide References Secure Configuration Guide This is very much around the appliance itself so familiarity with Linux hardening, particularly around SSH will be beneficial.

VCAP-CMA Deploy – Objective 8.1

Disclaimer: These are my notes from studying for the 3V0-31.18 exam. If something doesn’t make sense, please feel free to reach out. The main goal for this objective is the security of vRealize Automation. Objective 8.1 – Renew, and/or replace security certificates on distributed vRealize Automation components References Updating vRealize Automation Certificates This is about replacing the certificates on these components: vRA appliance IaaS Manager Service Server Web Server Other certificates that are in use manage themselves through self signed certificates to communicate.

VCAP-CMA Deploy – Objective 7.2

Disclaimer: These are my notes from studying for the 3V0-31.18 exam. If something doesn’t make sense, please feel free to reach out. The main goal for this objective is the initial installation & configuration of vRB in line with vRA. Objective 7.2 – Integrate vRealize Business with vRealize Automation References vRealize Automation Installation & Configuration vRealize Business Installation & Configuration Pretty simple objective this one. Once you’ve deployed the vRB appliance, browse to the vRB VAMI page, on the Register tab complete the details of the vRA appliance and hit register.

VCAP-CMA Deploy – Objective 7.1

Disclaimer: These are my notes from studying for the 3V0-31.18 exam. If something doesn’t make sense, please feel free to reach out. The main goal for this objective is scaling vRealize Automation Objective 7.1 – Scale vRealize Automation components to a highly-available configuration References vRealize Automation Installation & Configuration There are a few ways to scaling a vRA installation. The simplest of which involves installing IaaS components on your Windows servers & using the VAMI to add another vRA node to the cluster.

VCAP-CMA Deploy – Objective 6.2

Disclaimer: These are my notes from studying for the 3V0-31.18 exam. If something doesn’t make sense, please feel free to reach out. The main goal for the whole of section 6 is to understand the tenant administration required. Objective 6.2 – Add additional tenants and/or business groups to existing ones References Configuring vRealize Automation This should be a fairly quick objective to cover off. Add additional tenants Creating additional tenants is done by logging in as a System Administrator to the default tenant.

VCAP-CMA Deploy – Objective 6.1

Disclaimer: These are my notes from studying for the 3V0-31.18 exam. If something doesn’t make sense, please feel free to reach out. The main goal for the whole of section 6 is to understand the tenant administration required. Objective 6.1 – Manage Authentication Configuration to meet Business Requirements References Configuring vRealize Automation Identity Management in vRealize Automation 7 My study guide for the VCP-CMA – Objectives 2.2, 2.3 & 2.

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