What are the 50 Kubernetes concepts that you should know?

Well, I like to break them down into three sections:
- Day Zero
- Day One
- Day Two

A thread ๐Ÿงต
Day Zero is all about the planning and architecture phase. How will your environment look?
Day One is all about the deployment phase. Deploy your clusters and ensure that the process is repeatable.
Day Three is all about "whats next?". How will you upgrade your cluster? What does your monitoring and observability plan look like?
Want to learn more?

Check out the live stream recording where Chad and I break down exactly what you need to think about Kubernetes at your job.

Link below.



#kubernetes #devops #docker

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More from @TheNJDevOpsGuy

Feb 25
Kubernetes isn't something that you just "turn on" and walk away.

It's a platform that has to be considered a main part of how you deploy.

But how?

A thread ๐Ÿงต
It should be looked at no different than when you began to implement VMWare on bare metal or the cloud in your environment.

Kubernetes can't be something that's just on the back burner and implemented with 10% capacity. You have to think about:
โœ… What the future of the environment will look like

โœ… How you'll plan upgrades

โœ… What your backup and disaster recovery plan is

โœ… How you're going to move platforms/environments (for example - AWS to Azure) if you need to
Read 4 tweets
Dec 1, 2022
If you have an EKS cluster, that EKS cluster will have an IAM Role associated with it.

Ensure that the Role has all permissions needed.

For example, if you need to create Volumes for k8s, it'll need the following Policy Attachment.

How did I find this out?

#kubernetes #AWS Image
First, I tried to create a PVC and noticed that it was in a Pending state Image
Next, I described the PVC to see what was going on and I saw this.

`kubectl describe pvc name_of_pvc -n namespace_name` Image
Read 7 tweets
Dec 1, 2022
So... what is Kubernetes?

As Kubernetes continues to gain popularity, engineers have to know how Kubernetes works, and why it might make sense in their environment.

A thread ๐Ÿงต
Here are a few questions that you should ask yourself

- What benefits does Kubernetes bring to environments?
- What do technologies like containerization do for organizations?
- Does Kubernetes actually help teams?
In this blog post, Iโ€™ll provide some basic background on containers and Kubernetes.

Also, some suggestions for how to think about Kubernetes for infrastructure pros.
Read 4 tweets
Nov 30, 2022
Are you using Ingress Controllers in your Kubernetes environment?

If not, let's break down what they are.

A thread ๐Ÿงต
At a high level, Ingress Controllers are:
- Specify multiple paths
- Specify multiple services

All in one load balancer.

Let's break it down.
ingress Controllers are just like any other Controller in a Kubernetes environment. They confirm that the current state is the desired state for the deployment.
Read 7 tweets
Nov 23, 2022
Role Based Access Control (RBAC) is arguably one of the biggest headaches for engineers in a Kubernetes cluster.

However, there are certain ways to make it far easier.

A thread ๐Ÿงต
Before jumping into that, let's talk about RBAC.

When you're trying to access a Kubernetes cluster and perform an action, it takes two roles:

- Authentication
- Authorization
Authentication gets you into the cluster. Authorization allows you to perform a certain action in a cluster.
Read 7 tweets
Oct 11, 2022
Are you thinking about taking the Certified Kubernetes Administrator (CKA) exam?

A thread ๐Ÿงต

#kubernetes #devops #docker
If so, ensure that you're comfortable in the following domains:
- Kubernetes storage
- Troubleshooting system components (control planes and worker nodes)
- Pod and other workload scheduling (including high availability)

(cont)
- Cluster architecture (building out clusters using Kubeadm)
- All of the control plane and worker node components (Etcd, Controller, Scheduler, etc.)
- RBAC
- Cluster security
- Kubernetes services and networking
Read 10 tweets

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