Kubernetes Dashboard is a cool web UI for Kubernetes clusters. It supports the token authentication and you can enter a token on the startup screen. It is best practice to use your own token for security. For example, Audit logging. Access control per user. Do not share a token of…

Kubernetes provides great plugin architecture. You can extend kubectl with your plugins. If you are an author of a plugin, you need to do the following steps on each release. Build the plugin. Upload the binary to GitHub Releases or etc. Write a plugin manifest. Open a pull request to…

gradleupdate is a service which provides continuous update of Gradle in your GitHub repositories. Recently new version of Gradle is released every 1~2 months. gradleupdate allows automated tests with the latest version by CI. It is useful for Gradle plugin authors. Getting Started You need to add the following badge to README in a repository. [](https://gradleupdate.appspot.com/YOUR/REPO/status)

GitHub provides GraghQL API as well as REST API. This article introduces some example queries. You can try a query on https://developer.github.com/v4/explorer/. Users We can know about the current user by the following query: { viewer { login name avatarUrl url } } It will return the following response: {…

TL;DR Kubernetes supports EBS Persistent Volumes by default. It also supports EFS Persistent Volumes by the external efs-provisioner. This article introduces EFS Persistent Volumes (EFS PVs) and explains how we can use it and migrate to it. EBS vs EFS The article “When to Choose Amazon EFS” says: Amazon EFS provides shared file storage…

Atlassian JIRA and Confluence server supports single sign on (SSO) by using plugins. JIRA and Confluence have user management and LDAP integration, but you can integrate them with an identity manager such as Keycloak. It allows that an user types the password just once and login to many sites such…

kops does not support changing size or type of etcd volumes after cluster creation. It is inconvenient when you created too large volumes. If your etcd volumes are gp2 or io1 type, you can extend the volumes easily in the AWS management console. You can shrink the volumes by the…

Atlassian JIRA Software and Confluence are a nice agile management tool. We can start using JIRA and Confluence on Atlassian Cloud in a few minutes but we still need a private server in some cases. I just published Kubernetes Helm charts for JIRA and Confluence. …

Golang provides a simple HTTP server in http package. Now let’s think how to shutdown the HTTP server when it receives a request to the endpoint such as http://localhost:8000/shutdown. 1. Simply shutdown HTTP server http.Server provides Shutdown method for graceful shutdown. We can simply shutdown the HTTP server by calling Shutdown method in the handler…