Setting up a Rucio Kubernetes environment

Prerequisites

First, we have to clone this repo to our Local development environment.

git clone https://github.com/tbeerman/rucio-k8s-tutorial.git

• After cloning now we will install kubectl which is a command line toll for controlling Kubernetes clusters. kubectl looks for a file names config in the $HOME/... For details about each command, including all the sopported falgs and subcommands, see the kubectl reference documentation. To install kubectl visit on the following link:

https://kubernetes.io/docs/tasks/tools/install-kubectl/

• Now we need of helm package manager for Kubernetes. Helm is a tool that streamlines installing and managing Kubernetes applications. We can think of it like Apt/Yum/Homebrew for K8S. Helm uses a packaging format called charts which is a collection of files that describe a related set of Kubernetes resources. To install helm use the following link

https://helm.sh/docs/intro/install/

• Now, we will install minikube which is tool that will make us easy to run Kubernetes locally. Minikube will run a single-node cluster inside our provided Hypervisor on our laptop. There are different packages to install minikube. You can install according to your preference. To install minikube follow the given link:

https://kubernetes.io/docs/tasks/tools/install-minikube/

https://minikube.sigs.k8s.io/docs/start/

After installing minikube just confirm the installation. To confirm successful installation of both a hypervisorandminikube`, you can run the following command to start up a local cluster:

!!! Note For setting the --driver with minikube start, enter the name of hypervisor you instaled in lowercase letters where <driver_name> is mentioned below. A full list of --driver values is available in specifying the driver documentation.

minikube start --driver=<driver_name>

Once minikube start finishes, run the command below to check the status of the cluster:

minikube status

If your cluster is running, the output from minikube status should be similar to:

host: Running
kubelet: Running
apiserver: Running
kubeconfig: Configured

After you have confirmed whether whether Minikube is working with your chosen hypervisor , you can continue to use Minikube or you can stop your cluster. To stop your cluster, run:

minikube stop

• Start minikube with extra RAM to avoid insufficient memory issue:

minikube start --memory='4000mb'

• As in the previous steps we had installed Helm. Now we will add Helm chart repository that houses an index. yaml file and optionally some packaged charts. Follow the given command:

$ helm repo add stable https://kubernetes-charts.storage.googleapis.com/

$ helm repo add rucio https://rucio.github.io/helm-charts

Once this is installed, you will be able to list the charts you can install:

helm search repo stable
NAME                                    CHART VERSION   APP VERSION                     DESCRIPTION
stable/acs-engine-autoscaler            2.2.2           2.1.1                           DEPRECATED Scales worker nodes within agent pools
stable/aerospike                        0.2.8           v4.5.0.5                        A Helm chart for Aerospike in Kubernetes
stable/airflow                          4.1.0           1.10.4                          Airflow is a platform to programmatically autho...
stable/ambassador                       4.1.0           0.81.0                          A Helm chart for Datawire Ambassador
# ... and many more