====== K8S Installation ======

===== - Docker Installation =====
  * https://docs.docker.com/engine/install/ubuntu/
  * 
<code>
sudo apt-get remove docker docker-engine docker.io containerd runc
ansible -m shell -a "apt-get update" jenkins
 9751  ansible -m shell -a "apt-get update" k8s-all
 9752  ansible -m shell -a "apt-get install apt-transport-https ca-certificates curl gnupg-agent software-properties-common" k8s-all
 9753  ls
 9754  ansible -m shell -a "apt-get install apt-transport-https ca-certificates curl gnupg-agent software-properties-common" master
apt-key fingerprint 0EBFCD88
  271  add-apt-repository    "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
  272     $(lsb_release -cs) \
  273     stable"

 9755  ls
 9756  less hosts
 9757  ansible -m shell -a "apt-get install -y apt-transport-https ca-certificates curl gnupg-agent software-properties-common" k8s-all
 9758  ansible -m shell -a "curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -" k8s-all
 9759  ansible -m shell -a 'add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu \'
 9760  ansible -m shell -a 'add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable' k8s-all
 9761  ssh root@130.149.98.118
 9762  ansible -m shell -a "apt-get install -y docker-ce docker-ce-cli containerd.io" k8s-all

</code>


===== - K8S installation with Ansible =====
  * Playbooks: https://www.digitalocean.com/community/tutorials/how-to-create-a-kubernetes-cluster-using-kubeadm-on-ubuntu-18-04
  * https://github.com/omerbsezer/Fast-Kubernetes#architecture
  * https://www.tauceti.blog/posts/kubernetes-the-not-so-hard-way-with-ansible-worker-2020/
  * https://blog.mosibi.nl/all/2020/12/27/mosibi-kubernetes.html
  * Compare with 
    * https://linuxconfig.org/how-to-install-kubernetes-on-ubuntu-20-04-focal-fossa-linux
    * https://buildvirtual.net/deploy-a-kubernetes-cluster-using-ansible/
  * Cilium:
    * http://virtualelephant.com/2020/04/30/kubernetes-with-cilium-ansible-playbook/

==== - Other sources ====

  * https://platform9.com/blog/the-ultimate-guide-to-using-calico-flannel-weave-and-cilium/

==== - Notes ====
  * kubectl commands with normal user.

===== - Additional Resources =====
  * https://m7i.org/projects/ansible-playbook-for-cilium-on-docker/

==== - Best practices ====

  * https://docs.ansible.com/ansible/2.8/user_guide/playbooks_best_practices.html#best-practices
  * https://polarsquad.com/blog/ansible-best-practices-part-2
==== - Security ====
  * https://github.com/topics/ddos-attacks
===== - K8S cheatsheet =====
  * https://kubernetes.io/docs/reference/kubectl/cheatsheet/