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geek-cookbook/docs/ha-docker-swarm/docker.md
2017-07-16 23:34:10 +12:00

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# Introduction
We start building our cloud with virtual machines. You could use bare-metal machines as well, the configuration would be the same. Given that most readers (myself included) will be using virtual infrastructure, from now on I'll be referring strictly to VMs.
## Ingredients
3 x Virtual Machines, each with:
* CentOS/Fedora Atomic
* At least 1GB RAM
* At least 20GB disk space (but it'll be tight)
* Connectivity to each other within the same subnet, and on a low-latency link (i.e., no WAN links)
## Preparation