container.training/slides/setup-k8s.md

Setting up Kubernetes

• How did we set up these Kubernetes clusters that we're using?

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• We used kubeadm on "fresh" EC2 instances with Ubuntu 16.04 LTS

  1. Install Docker

  2. Install Kubernetes packages

  3. Run kubeadm init on the master node

  4. Set up Weave (the overlay network)
     (that step is just one kubectl apply command; discussed later)

  5. Run kubeadm join on the other nodes (with the token produced by kubeadm init)

  6. Copy the configuration file generated by kubeadm init

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kubeadm drawbacks

• Doesn't set up Docker or any other container engine

• Doesn't set up the overlay network

• Scripting is complex
  (because extracting the token requires advanced kubectl commands)

• Doesn't set up multi-master (no high availability)

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• It's still twice as many steps as setting up a Swarm cluster 😕

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Other deployment options

• If you are on Google Cloud: GKE

  Empirically the best Kubernetes deployment out there

• If you are on AWS: kops

  ... But with AWS re:invent just around the corner, expect some changes

• On a local machine: minikube, kubespawn, Docker4Mac (coming soon)

• If you want something customizable: kubicorn

  Probably the closest to a multi-cloud/hybrid solution so far, but in development

• Also, many commercial options!