# journalctl -xeu "Sakuragawa"

Update (Renew) Certificates in OpenShift (OKD) 3

Server certificates are used to provide encrypted traffic (HTTPS) in OpenShift. When a certificate is near expiration, renewal and replacement is needed. Prepare the Environment To replace certificates automatically, Ansible is used to manage the hosts. Pyton OpenSSL binding is required to parse and verify certificates. $ pipenv install pyopenssl New

Helm 2 on OpenShift (OKD) 3

Install the popular Kubernetes package manager and enable cluster-wide install ability. Helm 3? No Way! OpenShift 4 has built-in integration with Helm 3. Yet OpenShift 3 does not feature any integration. It is either not possible to install Helm 3 on OpenShift 3.[1] Luckily we still have Helm 2.

Connect Wi-Fi in a WPS (Push Button) Way with OpenWRT

I thought it was hard to pair device by WPS with OpenWRT, but I was wrong. According to the official wiki [https://openwrt.org/docs/guide-user/network/wifi/basic], it could be simply configured by adding some lines and packages. A minimal process to start WPS Push Button pairing starts

Some Tips on Telegraph (2020)

What and Why Telegraph? Telegra.ph [https://telegra.ph], or Telegraph is a publishing platform hosted by Telegram. It could be used to publish blog or any other articles, either signed or anonymously. Telegraph comes native with Telegram instant view support and some other Telegram integration. It is simple to

VT-d, vfio and GPU passthrough, Virtualization in a nutshell (RHEL8)

It's really an bad idea to build a machine just for gaming  so when an unexpected hardware arrives to my hand: A free RTX-2060 super but without a machine to power it, I decided to build it in a virtual way: a virtual machine with Windows and GPU attached to

# journalctl -xeu "Sakuragawa" © 2026