Blog Posts

Planning a production ready kubernetes with fundamental Controllers & Operators — Part 1 — Intro

• Haggai Philip Zagury (hagzag)
• Medium publications

Originally posted on the Israeli Tech Radar on medium.

Background on why I’m writing this series

Part of my role at Tikal requires me to interview candidates for DevOps / SRE / Platform Engineers, nowadays in the center of any modern application we have kubernetes and considering kubernetes has many extensions in the form of controllers and operators, one of the questions I like asking is — give me an example of 5 controllers or operators you used / will use when setting up a new kubernetes cluster, this post will attempt to answer that question as much as possible tackling the core challenges we meet when setting up and running an application on kubernetes.

Planning a production ready kubernetes with fundamental Controllers & Operators — Part 2 — Secrets

• Haggai Philip Zagury (hagzag)
• Medium publications

Originally posted on the Israeli Tech Radar on medium.

This post will continue presenting the idea of “additional controllers which do 80% of the job of making your kubernetes cluster production ready”

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Planning a production ready kubernetes with fundamental Controllers & Operators — Part 3 — DNS & Service discovery

• Haggai Philip Zagury (hagzag)
• Medium publications

Originally posted on the Israeli Tech Radar on medium.

As we continue to build our production grade cluster, we should explore the central components of Kubernetes, one of it’s core features is service discovery which is achieved by using DNS, this sub-system is fundamental for understanding how applications communicate with one other, and are how they are made accessible externally. This part of the series will start by diving into the internal mechanisms of service discovery, and then expand on how Kubernetes integrates with external DNS systems for service accessibility which will also prepare us for part 4 which will discuss ingress traffic.ֿ

Planning a production ready kubernetes with fundamental Controllers & Operators — Part 4

• Haggai Philip Zagury (hagzag)
• Medium publications

Originally posted on the Israeli Tech Radar on medium.

Welcome back to part four of our series on building a production-ready Kubernetes cluster with fundamental controllers and operators! In the previous parts, we explored essential components like Secrets and DNS management. Today, we’ll delve into the world of Ingress, a critical concept for routing external traffic to your applications within the cluster. To explain Ingress, I’ll be taking the Analogy approach, I’ll use the analogy of a city compared to a modern distributed computer:

Planning a production ready kubernetes with fundamental Controllers & Operators — Part 5 — Scheduling

• Haggai Philip Zagury (hagzag)
• Medium publications

Originally posted on the Israeli Tech Radar on medium.

TL;DR A brief overview of scheduling in Kubernetes, “the almighty” controller loop, and additional “influencers” that enhance workload management.

Pre-commit hooks using python library pre-commit

• Haggai Philip Zagury (hagzag)
• Developer experience ( dev ex)

Pre-commit examples used in just-do-it repository

I really need a strict pre-commit considering the number of branches and tools i’m using. Because the heart of the projects is tasks I want at the bare least .pre-commit-config.yaml to include the task --list-all command considering it compiles all the includes which may change name / location between branches.

12-factor application principles and How to build by-them

• Haggai Philip Zagury (hagzag)
• Architecture , Microservices

1. Codebase
2. Dependencies
3. Config
4. Backing services
5. Build, release, run
6. Processes
7. Port binding
8. Concurrency
9. Disposability
10. Dev/prod parity
11. Logs
12. Admin processes

These 12 principles are the core of application which are designed to as a service, or as it’s known for in short SaaS.

Building a Cloud Native Platform Brick by Brick

• Haggai Philip Zagury (hagzag)
• Development , Developer experience ( dev ex) , Presentations , Chaos engineering , Youtube

This video is my intro to Cloud Native Platform, given at DevOps days TLV

Introduction to Helm, The Kubernetes Package Manager

• Haggai Philip Zagury (hagzag)
• Development , Developer experience ( dev ex) , Presentations , Monitoring , Youtube

This video is my intro to Helm given at Tikal

Modern Monitoring, Tikal Knowledge

• Haggai Philip Zagury (hagzag)
• Development , Developer experience ( dev ex) , Presentations , Monitoring , Youtube

This video is my on Modern Monitoring with Prometheus and Grafana, given at Tikal