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- CentOS 7 (minimum supported version);
- at least 2 GB of RAM and 2 CPUs per machine;
- opening doors on the control plane (6443, 2379-2380, 10250-10252) and on the worker (10250, 30000-32767);
- Â uniqueness of MAC address and product_uuid for each node;
- complete connectivity between the cluster nodes;
- swap disabled on nodes.
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It's instructive to know which are the standard ports used by k8s and on which nodes (master, worker or, as we will see later, etcd) they must be opened. If you are using VMs instantiated thanks to OpenStack, it is not necessary to open these ports, because the machines communicate freely via their internal network. |
Now let's do a little study for the last 3 points of the list. Let's start with MAC address and product_uuid of the cluster nodes, making sure they are different from each other
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