Tag: iptables | Mjanja Tech

Understanding and Mitigating a DDoS Attack Against nginx

PostgreSQL locks on an nginx server of mine were through the roof and load had reached 55.0, yet the host only had eight CPUs. Was there some problem, or had a link to our website landed on the front page of the New York Times? A quick look at nginx’s access.log showed a very high […]

Managing Research Computing Clusters with Ansible

Our research computing cluster at work is slowly gathering more users, more storage, more applications, more physical machines etc. Managing everything consistently and predictably was beginning to get complicated (or maybe I’m just getting old?). There’s lots of buzz in DevOps circles about tools for managing this kind of scenario; Chef, Salt, Puppet and Ansible […]