Install Kubernetes Cluster with Ansible

Requirements

• Ansible (≥ 2.8.5)
• CentOS/RHEL 7
• *CoreOS (In future release)
• ISO Repo

We made kubernetes cluster installation automation with ansible. Purpose: Provide end-to-end installation with all components

Addons that can be installed with automation are as follows:

Note: Addons can be upgraded with the appopriate links or file under vars/main.yaml

Network

• Calico (layer 3)
• Flannel (layer 2)

Serverless

• Knative
• Kubeless

Storage

• Ceph

Other

• Autocompletion
• Kubens
• Metric Server
• Istio
• Helm
• Cluster Dashboard
• Cluster Logging(fluentd)
• Cluster Monitoring
• Weave
• Ingress Controller

Hardware Requirements

• Cluster Logging(fluentd) addon needs ≥32GB of Ram.
• To enable Ceph, three worker nodes should be present and worker nodes should have ≥10GB disk space. (Extra disk should be added to use Ceph. However do not mount that disk. Otherwise Ceph will not work)

Before Run Ansible

yum install -y python-pip
pip install jmespath

#create keygen and copy rsa key for all server

ssh-keygen
for host in 10.10.10.10 \
            10.10.10.11 \
		          10.10.10.12 \
		          10.10.10.13;\
do ssh-copy-id -i ~/.ssh/id_rsa.pub $host; \
done

Run Playbook

ansible-playbook playbook.yaml -i inventory.yaml

kubens helps you switch between Kubernetes namespaces smoothly

you need to define ingress for all components we install

kiali-ingress.yaml example:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: kiali-ingress
  namespace: istio-system
spec:
  rules:
  - host: kiali-10-10-10-11(worker_ip_addres).nip.io
    http:
      paths:
      - path: /
        backend:
          serviceName: kiali
          servicePort: 20001