README_PartII.md

Simple Kubernetes example (cont.)

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PART II: Deploy Nginx with storage

1. Deploy Nginx with a local volume

(Best option for development environments)

Architecture

1.1. Run Kubernetes on Minikube

• Install Minikube: https://kubernetes.io/docs/setup/minikube/

Minikube settings: Global: cat ~/.minikube/config/config.json , Local: cat ~/.minikube/machines/minikube/config.json , Command: minikube config [set|get] --help

1.2. Setup Minikube driver

• VirtualBox

1. Install VirtualBox + VirtualBox VM VirtualBox Extension Pack: https://www.virtualbox.org/wiki/Downloads
2. Set default driver: minikube config set vm-driver virtualbox

• KVM2

1. Install KVM2: https://github.com/kubernetes/minikube/blob/master/docs/drivers.md#kvm2-driver
2. Set default driver: minikube config set vm-driver kvm2

1.3. Deploy test environment: Local volume

(from: https://kubernetes.io/docs/tasks/configure-pod-container/configure-persistent-volume-storage/)

• Create environment: Start MiniKube, mount folder & apply k8s scripts

make localv_up

• View results

make localv_results

Output: This is a HOSTPATH test

• Destroy environment

make localv_down

• Official documentation
  • https://kubernetes.io/docs/setup/minikube/#persistent-volumes
  • https://kubernetes.io/docs/tasks/configure-pod-container/configure-persistent-volume-storage/

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2. Deploy Nginx with a GlusterFS volume

Architecture

Steps

• Create environment: Start Vagrant instances, provision K8s, provision GlusterFS, deploy Nginx pod

make glusterv_up

• View results

vagrant ssh k8sMaster
    $ curl http://192.168.32.12:$(kubectl get svc mynginx -o json | jq -j '.spec.ports[0].nodePort')

Output: This is a GLUSTERFS test

• Destroy environment

make glusterv_down

• Official documentation
  • https://docs.gluster.org/en/v3/CLI-Reference/cli-main/
  • https://docs.openshift.com/container-platform/3.9/install_config/storage_examples/gluster_example.html

Dependencies

• Exposing services: Expose an application outside a Kubernetes cluster using a Service

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3. Deploy Nginx with a Google Compute Engine (GCE) Persistent Disk volume !!EXPERIMENTAL!!

(TODO)

Architecture

Steps

• Commands

make gcev_apply

• Official documentation
  • https://cloud.google.com/kubernetes-engine/docs/tutorials/persistent-disk
  • https://github.com/GoogleCloudPlatform/kubernetes-engine-samples
  • https://kubernetes.io/docs/concepts/storage/volumes/#gcepersistentdisk
  • https://kubernetes.io/docs/concepts/storage/storage-classes/
  • https://cloud.google.com/compute/docs/disks/#performance
  • https://cloud.google.com/compute/docs/disks/add-persistent-disk#formatting

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