Ravi Singh

Deploy a minimal nginx app managed via Kustomize, write an ArgoCD Application manifest, and watch the GitOps loop in action — push to git, ArgoCD detects the diff, the cluster syncs.

Install ArgoCD on a local Kubernetes cluster, access the UI, set up the CLI, and understand what each component does — including the gotchas that will cost you an hour if you don’t know about them.

Problem # Adding a custom favicon to a Hugo site is straightforward — drop a favicon.ico into static/. But making it appear circular in the browser tab is trickier than it sounds. ImageMagick’s alpha channel handling for ICO files is unreliable. The corners either don’t go transparent or the 1-bit alpha makes edges look jagged. The browser ends up showing a square icon regardless.

Problem # Sometimes when using monorepos to host multiple services in a single repository, there may be a requirement to delete a file or list of files from each microservice. For example, I needed to delete application-dev.yml files for all the services after getting rid of dev environment in favor of acceptance. Solution # Use following find command to find application-dev.yml files recursively and delete them.

Error # While moving to kubernetes, and migrating spring boot apps, we encountered a strange behavior that few of the webpages served by freemarker templates in spring boot were adding port :8080 instead of just using the hostname with SSL port :443 Fix # After some investigation and trying to find some workaround, we found out that X-Forwarded-* headers needs to be forwarded by nginx ingress controller when it’s behind an azure app gateway(L7 load balancer).

How to solve IllegalArgumentException: Request header is too large in spring boot # When migrating a spring boot application to cloud, multiple layers got added to serve traffic. On prem: nginx -> spring boot app (tomcat) Azure: nginx -> azure application gateway -> nginx ingress controller -> spring boot app(tomcat) In Azure, we noticed that some of http requests threw 400 http status code in our logs.

Git Config commands git config –global init.defaultBranch main

Recently, I encountered sql state 42000 error in a spring boot application while moving from MySQL version 5.6 to 8.0. After inspecting stack trace and some googling, I got to know that few default configurations have changed in MySQL 8.0 (as expected 😃 ). This caused our poorly written queries to fail during migration. Background # Lets look at sample query using spring-data jpa to gather some analytics by aggregating data about a customer ordering products