If you get a chance, please check out kubetail (https://github.com/kubetail-org/kubetail). It's an open source log viewer for Kubernetes. Currently you can use it to look at pod logs from beginning to end, grouped together by workload (e.g. Deployment, CronJob) with basic filtering available (e.g. node-id, AZ). It doesn't let you look at historical logs yet but that's where we're headed. We just launched so we're eager for feedback and we like to build out new features quickly.