Creating a cluster

The vfarcic/k8s-specs (https://github.com/vfarcic/k8s-specs) repository will continue being our source of Kubernetes definitions we'll use for our examples. We'll make sure that it is up-to-date by pulling the latest version.

All the commands from this chapter are available in the 04-instrument.sh (https://gist.github.com/vfarcic/851b37be06bb7652e55529fcb28d2c16) Gist. Just as in the previous chapter, it contains not only the commands but also Prometheus' expressions. They are all commented (with #). If you're planning to copy and paste the expressions from the Gist, please exclude the comments. Each expression has # Prometheus expression comment on top to help you identify it.

 1  cd k8s-specs
 2
 3  git pull

Given that we learned how to install a fully operational Prometheus and the rest of the tools from its chart, and that we'll continue using them, I moved it to the Gists. Those that follow are copies of those we used in the previous chapter, with the addition of environment variables PROM_ADDR and AM_ADDR, and the steps for the installation of the Prometheus Chart. Please create a cluster that meets (or exceeds) the requirements specified in the Gists that follow, unless you already have a cluster that satisfies them.

gke-instrument.sh: GKE with 3 n1-standard-1 worker nodes, nginx Ingress, tiller, Prometheus Chart, and environment variables LB_IP, PROM_ADDR, and AM_ADDR (https://gist.github.com/675f4b3ee2c55ee718cf132e71e04c6e).
eks-instrument.sh: EKS with 3 t2.small worker nodes, nginx Ingress, tiller, Metrics Server, Prometheus Chart, and environment variables LB_IP, PROM_ADDR, and AM_ADDR (https://gist.github.com/70a14c8f15c7ffa533ea7feb75341545).
aks-instrument.sh: AKS with 3 Standard_B2s worker nodes, nginx Ingress, and tiller, Prometheus Chart, and environment variables LB_IP, PROM_ADDR, and AM_ADDR (https://gist.github.com/65a0d5834c9e20ebf1b99225fba0d339).
docker-instrument.sh: Docker for Desktop with 2 CPUs, 3 GB RAM, nginx Ingress, tiller, Metrics Server, Prometheus Chart, and environment variables LB_IP, PROM_ADDR, and AM_ADDR (https://gist.github.com/1dddcae847e97219ab75f936d93451c2).
minikube-instrument.sh: minikube with 2 CPUs, 3 GB RAM, ingress, storage-provisioner, default-storageclass, and metrics-server addons enabled, tiller, Prometheus Chart, and environment variables LB_IP, PROM_ADDR, and AM_ADDR (https://gist.github.com/779fae2ae374cf91a5929070e47bddc8).

Now we're ready to face our first simulated issue that might require debugging.

Table of Contents for Creating a cluster

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Table of Contents for
Creating a cluster