Using nginx to load balance microservices

Categories: infrastructure

How to load balance services with nginx, confd and etcd. Imagine this, you have a bunch of services running on a machine, all is fine and dandy. You have the occasional downtime when you upgrade a service to a new version, but nothing you can’t handle. Then, out of nowhere, you get loads of traffic, you need to scale horizontally, adding more servers to your cluster. Upgrading becomes harder, takes longer and there’s more downtime. Read more...

Static DNS with DHCP on CoreOS

Categories: coreos, infrastructure

TL;DR;

How to set static DNS servers while still getting IP and routes from the DHCP server in CoreOS.

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IP addresses

Categories: Infrastructure

TL;DR;

A cheat sheet to IPv4 subnetting and other quirks. Common subnet configurations with CIDR and netmask notation.

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