This error occurs because of BGSAVE being failed. A lot of the times BGSAVE fails because the fork can't allocate memory. Many times the fork fails to allocate memory (although the machine has enough RAM available) because of a conflicting optimization by the OS.
GitHub Flavored Markdown doesn't support footnotes, but it could be faked with superscript tags. It could be even made clickable here as well.
Setting up a OpenShift Origin (OKD) cluster with containerized GlusterFS, customized self-signed CA certificates and trouble shooting.
GlusterFS is a popular solution for distributed storage. To provide persistent storage for Kubenetes cluster from GlusterFS cluster, Heketi is spreadly used as an API.
Days before, I migrated docker-compose services to Rancher container cloud. I will demostrate how I deploy Gitea, a popular self-hosted coding hosting software, with full Web UI and native-like SSH functionality.
One of our internal production is running an OpenShift 3.7 cluster. As OKD 3.10 is rolling out, 3.7 is far too old and missing some useful new features. "Let's get it upgraded!" I shouted out, and nightmares started too to pour out. How did I break it? How should I fix it?