Building Kubernetes Kudu Cluster Using Helm Chart

Note	All of this work is experimental and subject to change or removal.

Getting Started

Helm — The package manager for Kubernetes. Helps to define, install, and upgrade Kubernetes applications

Note	Read more about Helm here https://helm.sh/docs/using_helm/#quickstart

System Requirements

kubectl
minikube or kubeadm
docker
helm

Build Kudu Docker Image

../../docker/docker-build.sh

Creating Namespace

kubectl create -f ../namespace.yaml

Creating ServiceAccount And Role Binding (RBAC)

kubectl create -f kudu-rbac.yaml

Initializing Helm Tiller

helm init --service-account kudu-helm --tiller-namespace apache-kudu --upgrade --wait

Check if tiller is initialized and you should not see any authorization errors.

helm ls --namespace apache-kudu --tiller-namespace apache-kudu

Helm Launch Kudu cluster

helm install kudu --namespace apache-kudu --name apache-kudu --tiller-namespace apache-kudu --wait

helm install kudu -f kudu-expose-all.yaml --namespace apache-kudu --name apache-kudu --tiller-namespace apache-kudu --wait

You should see below output on stdout

NAME:   apache-kudu
LAST DEPLOYED: Fri Jun  7 12:03:47 2019
NAMESPACE: apache-kudu
STATUS: DEPLOYED

RESOURCES:
==> v1/Pod(related)
NAME            READY  STATUS   RESTARTS  AGE
kudu-master-0   1/1    Running  0         12s
kudu-master-1   1/1    Running  0         12s
kudu-master-2   1/1    Running  0         12s
kudu-tserver-0  1/1    Running  0         12s
kudu-tserver-1  1/1    Running  0         12s

==> v1/Service
NAME                  TYPE       CLUSTER-IP     EXTERNAL-IP  PORT(S)                        AGE
kudu-master-service   NodePort   10.100.28.117  <none>       8051:31198/TCP,8050:31182/TCP  12s
kudu-masters          ClusterIP  None           <none>       8051/TCP,8050/TCP              12s
kudu-tserver-service  NodePort   10.103.171.31  <none>       7051:30967/TCP,7050:32543/TCP  12s
kudu-tservers         ClusterIP  None           <none>       7051/TCP,7050/TCP              12s

==> v1/StatefulSet
NAME          READY  AGE
kudu-master   3/3    12s
kudu-tserver  2/2    12s

==> v1beta1/PodDisruptionBudget
NAME              MIN AVAILABLE  MAX UNAVAILABLE  ALLOWED DISRUPTIONS  AGE
kudu-tserver-pdb  N/A            1                1                    12s

Port Forward The Kudu Master UI

kubectl port-forward kudu-master-0 8051 -n apache-kudu
OR
minikube service kudu-master-service --url -n apache-kudu

Destroy The Kudu Cluster

helm del --purge apache-kudu --tiller-namespace apache-kudu

Display Kudu Master Logs:

kubectl logs kudu-master-0 --namespace apache-kudu

Testing Helm Charts

# helm-template : it will render chart templates locally and display the output.
helm template kudu

# To render just one template in a chart
helm template kudu -x templates/kudu-service.yaml

# helm lint: examines a chart for possible issues, useful to validate chart dependencies.
helm lint kudu --namespace apache-kudu --tiller-namespace apache-kudu

# The argument this command takes is the name of a deployed release.
# The tests to be run are defined in the chart that was installed.
helm test apache-kudu --tiller-namespace apache-kudu