Five years ago I wrote a blog post against Kubernetes sidecars. I wrote that in response to the early days of sidecar containers becoming in vogue, and in response to Airbnb’s talk demonstrating the 7 containers they need for service discovery. At Yelp, we held off on running sidecars at all, and stuck to the single-container model on k8s for a long time, relying on host daemons for almost everything extra.
