Nicolas Frankel174 articles
Table of Contents My use caseRecipe basicsPutting it all togetherTesting the recipePotential future worksConclusion I’ve been eying OpenRewrite for some time, but I haven’t had time to play with it yet. In case you never heard about OpenRewrite, OpenRewrite takes …

- Nicolas Frankel
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Cloudflare Tunnel for Home Assistant
Table of Contents The initial setupCloudflare Tunnel for Home AssistantRemoving Let’s Encrypt add-onConclusion I continue to take care of my Home Assistant. This week, I replaced my original setup with Cloudflare Tunnel. This is the 6th post in the My …
- Nicolas Frankel
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Getting a single value from a device’s state in Home Assistant
I recently acquired Netatmo smart radiator valves to manage my rooms’ temperature remotely. I’m not skilled at manual tasks, but I could easily replace the old thermo-static valves. I then registered the smart ones in the Netatmo app. Finally, I …
- Nicolas Frankel
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Improving Maven’s dependency:analyze… or not
Table of Contents The mvn dependency:analyze commandSpring Boot startersBringing the maven-dependency-analyzer into the modern ageConclusion Recently, my good friend Richard Fichtner advised using the mvn dependency:analyze command to get rid of declared but unused dependencies: There is another use case …
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Mutation Testing in Rust
Table of Contents Starting with cargo-mutantsFinding and fixing the issueConclusion I’ve been a big fan of Mutation Testing since I discovered PIT. As I dive deeper into Rust, I wanted to check the state of mutation testing in Rust. Starting …
- Nicolas Frankel
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The try block in Rust
Table of Contents The limit of the ? operatorThe verbose alternativeThe try block to the rescueConclusion I wrote previously about libs for error management in Rust. This week, I want to write about the try block, an experimental feature. The …
- Nicolas Frankel
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One giant Kubernetes cluster for everything
Table of Contents The one giant cluster approachBetter resource utilizationLower operational overheadStraightforward networking and service communicationSimplified governanceCost efficiencyDownsides of a one giant cluster approachLarger blast radiusComplex multi-tenancy managementScalability limitsCluster-wide objectsWhat’s the ideal size, then?vClusterHow vCluster mitigates the downsides of a …
- Nicolas Frankel
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WebAssembly on Kubernetes
Table of Contents My approach and the use caseBaseline: regular Rust-to-nativeAdapting to WebAssemblyRunning the Wasm image on DockerRunning the Wasm image on KubernetesFinal stepsConclusion Like a couple of innovative technologies, different people have different viewpoints on where WebAssembly fits the …
- Nicolas Frankel
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Pull request testing on Kubernetes: testing locally and on GitHub workflows
Table of Contents Unit testing vs. integration testingTestcontainersUse-case: application with database”Unit” testing”Integration” testingThe GitHub workflowAlternative “Unit testing” on GitHubConclusion Imagine an organization with the following practices: Commits code on GitHub Runs its CI/CD pipelines with GitHub Actions Runs its production …
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Pull Request testing on Kubernetes: Working with GitHub Actions and GKE
Table of Contents Building and storing the imageSizing the clusterAuthenticate on Google Cloud from a GitHub workflowWorking within the GitHub workflowCreate a Kubernetes manifestSetting the correct GitHub image tagAccessing the private GitHub registry from GKEGet the PostgreSQL connection parametersGetting the …
- Nicolas Frankel
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Pull request testing on Kubernetes: vCluster for isolation and costs control
Table of Contents Weaving vCluster into the GitHub workflowChanges to the workflowCleaning upConclusion This week’s article is the third and final in my series about running tests on Kubernetes for each pull request. In the first post, I described the …
- Nicolas Frankel