Kintone Engineering Blog

Learn about Kintone's engineering efforts. Kintone is provided by Cybozu Inc., a Tokyo-based public company founded in 1997.

Introducing MOCO, a modern MySQL operator on Kubernetes

By Hirotaka Yamamoto (@ymmt2005) We are proud to announce a new MySQL operator named MOCO. MOCO manages MySQL clusters on Kubernetes that replicate data using GTID-based semi-synchronous replication. We will be migrating hundreds of MySQL …

Architecture for isomorphic API Client with TypeScript

By Toru Kobayashi (@koba04) This article will introduce how we've built @kintone/rest-api-client and its architecture.

Placemat: Powerful Data Center Virtualization Tool

By Yusuke Suzuki Placemat is our open-source software built to provide data center virtualization for CI automated testing along with technologies like QEMU/KVM virtual machines and Linux networking stacks. Setting up a CI environment for …

Multi-tenancy monitoring system for Kubernetes cluster using VictoriaMetrics and operators

By UMEZAWA Takeshi We are building a large data center system using Kubernetes for various development teams in the same company. To monitor the system activities, we used to rely on Prometheus and Grafana. Recently, we revamped our monito…

Tolerating failures in container image registries

By Akihiro Ikezoe, Hirotaka Yamamoto Have you ever experienced that your Kubernetes cluster cannot create new Pods because Docker Hub or other container registries are down? This article will show you several ways to ensure your Kubernetes…

Rebooting a LOT of Kubernetes nodes in a declarative way

By Daichi Sakaue (@yokaze) Hi, I'm Daichi, and I'm working on developing our on-premise data centers using Kubernetes (k8s). Have you ever spent a whole day rebooting all the machines in a Kubernetes cluster? Just checking the steps and ch…

Delegating CNI requests to a gRPC server for better tracing

By Hirotaka Yamamoto (@ymmt2005) Coil v2 is a Kubernetes network plugin that implements Container Networking Interface (CNI) 0.4.0. CNI defines plugins as executables. In Kubernetes, kubelet or container runtimes such as containerd directl…