This document summarizes Seungkyu Ahn's experience working with various technologies over time including transitioning from JSP/Servlet to Spring and Hibernate, CVS to Git, Ant to Maven, and Waterfall to Agile methodologies. It also lists technologies he has worked with like OpenStack, Linux, Docker, Kubernetes, and is currently learning like Deep Learning, Spring Boot, and mobile development. It provides configuration details for installing a Kubernetes cluster using Kubespray including specifying host files, roles, and cluster configuration with options like Calico networking, Kubernetes version, and enabling/disabling addons.

1. 안승규 (Seungkyu Ahn)
ahnsk@sk.com
Building Infra

2. 저는 소개하자면
• JSP&Servlet -> EJB -> Spring, Hibernate
• CVS -> Subversion -> Git
• Ant -> Maven
• Transactional Script -> OR Mapping, Domain Modeling
• Heavy Class -> Design pattern, Refactoring
• Waterfall, UML -> XP
Developer : ~2010년
Engineer : 2011년~
• OpenStack
• Linux
• Docker, Kubernetes
• Ansible
학습중
• Deep Learning
• Spring boot, Frontend, IOS, Android
https://www.ahnseungkyu.com
seungkyua@gmail.com

3. 3
Kubernetes Architecture
3
Kube-API
Master
Kube-Scheduler
Kube-Controller
Node
Kube-Proxy
Kubelet
Kube-Proxy
Kubelet
Nginx
Calico
Calico
Etcd

4. 4
Kubespray
4
• Kubernetes incubator
• https://github.com/kubernetes-incubator/kubespray
• Ansible

5. 5
Prerequisite
5
• Connect using ssh without password for all node
• sudo no password
• Install Python - all node
• swapoff
• Install pip
• pip install -r requirements.txt
• Install ansible

6. 6
Host file
6

7. 7
Host file
7
k0-master01 ansible_port=22 ansible_host=k0-master01 ip=10.0.0.177
k0-node01 ansible_port=22 ansible_host=k0-node01 ip=10.0.0.178
[etcd]
k0-master01
[kube-master]
k0-master01
[kube-node]
k0-node01
[k8s-cluster:children]
kube-node
kube-master

8. 8
roles
8

9. 9
k8s-cluster.yml
9

10. 10
k8s-cluster.yml
10
kube_version: v1.10.4
kube_network_plugin: calico
kube_service_addresses: 10.233.0.0/18
kube_pods_subnet: 10.233.64.0/18
dashboard_enabled: true
helm_enabled: false
istio_enabled: false
local_volume_provisioner_enabled: false
ingress_nginx_enabled: false

11. 11
Install kubernetes
11
ansible-playbook -u seungkyua -b -i
inventory/k0-seungkyua/hosts.ini cluster.yml

12. 12
kubernetes cluster
12

13. Kubernetes Korea User Group
https://www.facebook.com/groups/k8skr/

14. Q&A