Mateo Cuervo

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🛜 Step-by-Step DNS Journey: From your Browser → Home Network → Internet → Server

1) DNS Query Initiation Example you type a URL (e.g., cooervo.com) into your browser. 2) Local /etc/hosts file * Your computer first checks the local hosts file before

Mateo Cuervo

11 Apr 2025 · 4 min read

Useful tools for network debugging in kubernetes

Create a light weight Deployment for miscellaneous testing: apiVersion: apps/v1 kind: Deployment metadata: labels: app: example-app name: example-app namespace: debug spec: revisionHistoryLimit: 1 selector: matchLabels: app: example-app template: metadata:

Mateo Cuervo

22 Nov 2024 · 1 min read

Scalable multi-environment directory structure for a kubernetes project using kustomize, helm and ArgoCD

Personally I find ArgoCD works perfectly fine for kustomize and helm charts. Each tool is used in the following manner: 1. argoCD for configuring kubernetes deployments, keeping Applications in sync

Mateo Cuervo

10 Oct 2024 · 3 min read

Create an nginx-ingress load balancer in Kubernetes (GKE), with explicit allowlist (whitelist) of IPs

Considering you already have a kubernetes cluster here we are going to use the kubernetes ingress-nginx helm chart to install nginx and serve a simple example app named status-app , once

Mateo Cuervo

23 Aug 2024 · 2 min read

Integrate Istio's Service Mesh ingress gateway with a GCP Ingress Load Balancer

After realizing that there wasn't a comprehensive tutorial on integrating GCP's Ingress load balancer with Istio Service Mesh in a Google Kubernetes Engine (GKE) cluster, I

Mateo Cuervo

15 Aug 2024 · 3 min read

Download docker image and push to GCP Artifact Registry Repository

First pull the docker image you want to download the docker pull cooervo/server-with-args:v1.0 # Specify platform architecture docker pull \ --platform linux/amd64 \ cooervo/server-with-args:v1.0 Then tag

Mateo Cuervo

5 Jul 2024 · 1 min read

Create a new ArgoCD user with custom permissions

In your ArgoCD helm values.yaml file create a new user by adding it to the ConfigMap named argocd-cm.yaml, example here I will add a user named devs-read-only, which

Mateo Cuervo

24 Jun 2024 · 1 min read

argocd-image-updater

Authenticate to GCP's Artifact Registry Repository with argocd-image-updater

With argocd-image-updater we can automate deployments in our Kubernetes cluster, after our continous integration (CI) pipelines have built and pushed the docker image into Artifact Registry or our preferred artifact

Mateo Cuervo

30 May 2024 · 3 min read

Helm cheatsheet of the most used commands

The following are the most common commands you need to use helm on a day to day basis. With this commands you will be able to perform the vast majority

Mateo Cuervo

23 May 2024 · 1 min read

ArgoCD: Authenticate to private Github repository via ssh

ArgoCD: Authenticate to private Github repository via ssh

In this article I'll share a step by step of how to add ssh authentication to a private Github repository: Create the key pair (select empty passphrases on

Mateo Cuervo

19 Apr 2024 · 2 min read