Kubernetes Setup Using Ansible and Vagrant

TOC

• Kubernetes Setup Using Ansible and Vagrant
  • TOC
  • Vagrantfile compatibility versions
  • Useful links
  • Useful commands
  • Kubernetes commands
  • Helm commands

Vagrantfile compatibility versions

Vagrant version	Virtualbox version
v2.2.4	Version 6.0.10 r132072 (Qt5.6.2)
v2.2.5	Version 6.0.10 r132072 (Qt5.6.2)
	Version 6.0.10 r132072 (Qt5.9.5)

Useful links

• Kubernetes Setup Using Ansible and Vagrant
• Using Vagrant/Ansible to spin up a multi-node kubernetes cluster fails detecting kubelet file
• Intelligent Vagrant and Ansible files
• Kubernetes dashboard
• Install shell completion
• Calico Project
• Helm Charts
• Kubernetes-demo
• wardviaene/kubernetes-course: Kubernetes Course Files
• ricardoandre97/k8s-resources

Useful commands

# Get kubernetes cluster up and ready
$> cd /path/to/Vagrantfile
$> vagrant up

## Accessing master
$> vagrant ssh k8s-master
vagrant@k8s-master:~$ kubectl get nodes
NAME         STATUS   ROLES    AGE     VERSION
k8s-master   Ready    master   18m     v1.16.3
node-1       Ready    <none>   10m     v1.16.3
node-2       Ready    <none>   2m37s   v1.16.3

## Accessing nodes
$> vagrant ssh node-1
$> vagrant ssh node-2

# Remove kubernetes cluster
$> cd /path/to/Vagrantfile
$> vagrant destroy -f

Kubernetes commands

# Get available versions
$> kubectl api-versions
# Get available resources
$> kubectl api-resources
# Get Kubernetes version
$> kubectl version
# Get Kubernetes Namespaces
$> kubectl get namespaces
# Get Kubernetes nodes
$> kubectl get nodes
# Running a single pod 
$> kubectl run my-apache --image httpd
# List pods
$> kubectl get pods
# List all objects
$> kubectl get all
# Scaling pods
$> kubectl scale deployment my-apache --replicas 2
# Geting logs 
$> kubectl logs deployment/my-apache
# Describing pod
$> kubectl describe pod my-apache-<hash>-<hash>
# See deployment history
$> kubectl roolout history deployment <deployment-name>

Helm commands

# Build and name a new chart
$> helm create <chart-name>
# Test template 
$> helm install <chart-name> --debug --dry-run --generate-name
# Deploy template
$> helm install <chart-name> --generate-name
$> helm install <name> <chart-name>
# Delete all charts
$> helm del $(helm ls --all --short)
# Downloading a new chart
$> helm fetch stable/kibana
$> helm fetch stable/kibana --untar
# Listing repositories
$> helm repo list
# Listing available charts in repository
$> helm repo update
$> helm search repo <repo-name>
# Adding new repository
$> helm repo add <helm_repository_name> http://<host>:<port>/repository/<nexus_repository_name>/ --username <username> --password <password>
# Uploading a chart to Nexus3 (https://github.com/sonatype-nexus-community/helm-nexus-push)
$> helm package <chart-name>
$> helm plugin install --version master https://github.com/sonatype-nexus-community/helm-nexus-push.git
$> helm nexus-push <repo> <chart>.tgz --username <username> --password <password>