Mont Blanc is [not] the highest mountain–risk of local optimization
The best solution may not be the best solution. Depending on the scope in which you consider the alternatives, you may arrive at the wrong conclusion. Consider only the …
Author: Lucas Jellema
Five part article series introducing Go on OCI
Go – sometimes Golang because internet searching for just “go” is quite impossible – is a popular programming language. It was initially launched in 2012 and as been gaining …
OCI Function Parameters based on Vault Secrets–an enhancement request
OCI Functions are powerful components in a cloud native world. Triggered by events and direct requests, these functions are engaged to perform a specific task. Which could be almost …
Use it .. or lose it. On Application and Feature decommissioning
“Can we let go of that office building?” (we pay rent, utilities, furniture – is that still necessary or justified) “Well, I believe Chris is still making use of …
Dynamic Configuration of Terraform plans and Stacks in Oracle Cloud Infrastructure
Some of the data used by Terraform to create cloud resources is sensitive and should not be stored in plain text in source code repositories. Examples are passwords, client …
Terraform – injecting local and remote Configuration Data
This article describes how a Terraform plan can read configuration data at plan and application time from local or remote JSON documents to provide dynamic, easily and centrally maintainable …
Many ways to provision Oracle Cloud Resources using Terraform
Terraform is used for automated provisioning of resource on Oracle Cloud Infrastructure. Resources are defined in HCL – the DSL used in Terraform for describing infrastructure – and these …
Create Terraform Stack and Apply it to Provision Resources on Oracle Cloud Infrastructure
Terraform is the tool of choice for automated provisioning of cloud resources on Oracle Cloud Infrastructure (IaC). In two recent articles, I have demonstrated how to create a plan …
Terraform Modules, For-Each, File Set on Oracle Cloud
The creation of cloud resources on Oracle Cloud Infrastructure is ideally done as Infra as Code using Terraform (plans). No hands need to touch the console, no permissions need …
Terraform from Cloud Shell for OCI resource creation through Infra as Code
The creation of cloud resources on Oracle Cloud Infrastructure is ideally done as Infra as Code using Terraform (plans). No hands need to touch the console, no permissions need …
Delayed Delivery in OCI Queue Service–time based message release
Messages published to an Oracle Cloud Infrastructure (OCI) Queue may not immediately be intended for consumption. It is a not uncommon requirement to make messages available for consumption only …
Generic OCI Resource manipulation with OCI CLI Raw Request
I should have been aware of it – but I was not. The generic OCI CLI Raw Request option – the uniform approach to any OCI resource query or …
First Steps with OCI Queue Service–fully managed massively scalable FIFO queue
In an earlier article, I have explored the promise of OCI Queue – a managed queue service launched in December 2022. In this article I will show my first …
OCI Queue– simple, powerful, heavy duty reliable decoupling
The new OCI Queue Service provides a straightforward offering: publish messages into a persisted store and allow consumers to retrieve these messages from that store – the oldest message …
Quickest way to run a container on Oracle Cloud Infrastructure: container instances
Container Instances on Oracle Cloud Infrastructure are VM based environments that can be leveraged as “serverless” container runtimes. Once a container instance has been defined – which is a …
Oracle Cloud Infrastructure–flutter of activity: Queue, Container Instances
Over the last few days, in this pre-Holiday season period, Oracle has released a number of interesting new services and updates to existing services. I plan on exploring them …
Unified Auditing not possible for Oracle Database XE (Express Edition)
I recently tried to get Unified Auditing going for Oracle Database XE. I could not really find instructions – not even through ChatGPT – and finally reached out to …
GitHub Copilot reduces writing Java boilerplate to two simple comments
GitHub Copilot helped me write a Java application to process a CSV file. Not a hard task – though one that in Java always feels much harder than in …
Overhead of Service Mesh–measuring and comparing Istio, Linkerd, Kuma and Consul
A Service Mesh can provide many facilities regarding traffic management between microservices – from simple routing and load balancing, producing telemetry to applying complex routing logic and security policies. …
Run your own instance of Backstage in 3 minutes
Backstage is the Developer Portal Platform that has come out of Spotify and now lives under the CNCF (Cloud Native Compute Foundation) umbrella where it is one of the …
Running OpenTelemetry Demo in Gitpod Workspace–two click install
Recently the OpenTelemetry project launched a demo application that demonstrates many aspects of instrumentation, metrics and trace gathering, providing insight across multi-service, multi-technology application stacks and in general how …
Gitpod workspace for instant Dapr explorations
I have prepared a Gitpod wokspace definition that allows me to start a fresh development environment with the latest release of Dapr (dapr.io) installed as well as supporting containers …
Gitpod for Oracle Cloud Infrastructure development
Gidpod provides ephemeral development environments. Run a Gitpod workspace and get a clean environment with precisely those components that have been configured for the use case or context you …
Quickly try out Kubernetes with two Pods–web app and database
Two colleagues wanted to try out Kubernetes and more specifically deployment of an application on Kubernetes that was not entirely trivial. One that consists of at least two Pods …
Which tools and technologies are new and exciting, proven, growing stale–report from Devoxx 2022
October 14, 2022
Architecture, Cloud, Frontend technology, Kubernetes, Software Development
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A conference such as Devoxx is a great opportunity to get inspired into trying out tools and technologies that may not or only be vaguely be known as they …
Reflections from Devoxx 2022–on software engineering today
End of day two. So many topics already were presented, demonstrated, discussed, tried out to and by me. This article is just a very brief overview of what caught …
One click free browser based Oracle Database environment with Gitpod
This article describes how you can run your very own Oracle Database from your browser using Gitpod. With a free account (50 hours Gitpod use per month), you can …
Booting up–even quite senior – laptops with Ubuntu Linux OS using Rufus
The challenge was as follows: provide a handson workshop environment – consisting of nothing more than a browser connected to our office’s Wifi network – for visitors to the …
First steps with Gitpod – great for try out, quick open source contributions and for workshops
Gitpod.io is a SaaS for software developers (that can also be used in self-hosted mode on Kubernetes). Gitpod makes workspaces available – typically based on a Git repository – …
Oracle Database 23c–new feature highlights (release February 2023?)
Based on the fascinating Twitter thread by Philipp Salvisberg covering the presentation by Gerald Venzl at DOAG 2022 I would like to mention a few of the features that …
Oracle Cloud’s marching order: win developers’ hearts and minds
There are two public cloud. AWS and Azure. That is not actually the case – but that is how sometimes it may seem. A third cloud is frequently listed …
Build JHipster application for and Run on Docker or Podman
For the Open Day we organize shortly for our family, friends, neighbours and other interested parties, my colleagues create a custom web application to support our QR Scavenger Hunt …
Run "docker-compose" on Oracle Cloud Infrastructure Compute using Podman
Running “docker compose” in a VM on Oracle Cloud Infrastructure is perhaps not the ideal way to go – which probably would be OKE (Kubernetes) in order to benefit …
Pseudo Change Timestamp–Finding recently changed table rows using Flashback Version Query to provide a surrogate last_changed column
My challenge: replicate changes from database A to database B, once per day. The tables involved are pretty big (100M records). I really would not want to process them …
Quick Start with initially free Low Code Front End Development using Retool against ElephantSQL PostgreSQL
Front end development can be an art. An almost pixel by pixel design, a careful crafting UX or even CX. And there is a time and place and technology …
Quick start with free managed PostgreSQL database on ElephantSQL
This article shows you can quickly get started with a free, managed PostgreSQL database with a table full of country data (using ElephantSQL). ElephantSQL is a hosted, managed PostgreSQL …
Supabase for Persistence and Server to Client Push in Vanilla HTML/JavaScript web application–a step by step guide
Supabase provides a cloud based backend service to web applications. That means that any (static) web application can use Supabase for user authentication and data persistence. Supabase provides a …
Steampipe–analyze data from cloud, file, platform, IaC using SQL queries
In our daily work we are dealing with data from many sources. Data in CSV files, from Cloud APIs, in mail servers, configuration files, Terraform plans, in logging systems, …
Creating a minimal container image for a Go application
How hard can it be – to create the smallest possible container image to run a Go application? It is not hard to create a container image that contains …
WebSinker–generic event detection for unhooked systems to trigger WebHook
Quite a few systems – business applications large and small – do not have support for WebHooks. That is: they do not offer the ability to register a URL …