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A practitioner's tale on clouds

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Thanassis Parathyras
Thanassis Parathyras

This talk is about an introduction to practical aspects of what a cloud platform should offer, while connecting with essential background information of cloud computing theory. We are going to review the basics of a cloud computing platform. After laying the field of the cloud as a means for automated infrastructure, we are going to extend in Ansible for cloud management. Ansible is one option for running orchestrated workflows over one or multiple IT environments, while also covers the network management. We shall describe by example the management of cloud resources and services residing on those resources based on Ansible playbooks. Then, a discussion on the abstractions available through variables,roles and inventories will follow.

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A practitioner's tale on clouds Oπen conf, Athens, Greece 29 March 2019, Cloud day
Page - 2 CEO and co-founder #OSATH organizer Thanassis Parathyras cloud expert, open-source enthusiast, OpenStack instructor, Ansible practitioner www.linkedin.com/in/parathyras/
Page - 3 the cloud expectations · meaning · practice
Page - 4 no downtime elastic resources
Page - 5 self-service application control source: https://governance.openstack.org/tc/reference/technical-vision.html PaaS SaaS IaaS
Page - 6 PaaS SaaS IaaS
Page - 7 PaaS SaaS IaaS as-a-service Business model Pay as you Go - OPEX Minimizes IT fixed assets - CAPEX Managed Services
Page - 8 Applications
Page - 9 Applications Data center
Page - 10 Applications Data centerAutomates
Page - 11 Applications Data center Increased Automation
Page - 12 Ansible plays · modules · inventory · variables
Page - 13 --- - hosts: web-farm tasks: - name: Be sure apache is installed package: name: "{{ httpd_packages }}" state: present - name: Be sure apache is configured template: src: httpd.conf.j2 dest: "{{ httpd_conf.MainConfPath }}" Task Automation Ansible play
Page - 14 --- - hosts: web-farm tasks: - name: Be sure apache is installed package: name: "{{ httpd_packages }}" state: present - name: Be sure apache is configured template: src: httpd.conf.j2 dest: "{{ httpd_conf.MainConfPath }}" Task Automation Ansible play Ansible modules
Page - 15 --- - hosts: web-farm tasks: - name: Be sure apache is installed package: name: "{{ httpd_packages }}" state: present - name: Be sure apache is configured template: src: httpd.conf.j2 dest: "{{ httpd_conf.MainConfPath }}" Task Automation Ansible play Ansible modules Define desired state with parameters ansible-doc
Page - 16 A B operation
Page - 17 A B B operation operation
Page - 18 A B B operation operation IDEMPOTENCE
Page - 19 Initial State Final State Ansible Ansible modules IDEMPOTENCE Ansible Final State
Page - 20 Variables Config settings System level Application Vars defined CLI several files priority # httpd version httpd_version: "2.4.6" httpd_packages: - "httpd" - "mod_ssl" # httpd.conf options httpd_conf: ServerRoot: "/etc/httpd" MainConfPath: "/etc/httpd/conf/httpd.conf" DocumentRoot: "/var/www" ListenPort: - "80" - "443"
Page - 21 --- - hosts: web-farm vars_files: - path/to/htppd.vars tasks: - name: Be sure apache is installed package: name: "{{ httpd_packages }}" state: present - name: Be sure apache is configured template: src: httpd.conf.j2 dest: "{{ httpd_conf.MainConfPath }}" Task Automation Ansible play Variables Ansible modules
Page - 22 --- - hosts: web-farm vars_files: - path/to/htppd.vars tasks: - name: Be sure apache is installed package: name: "{{ httpd_packages }}" state: present - name: Be sure apache is configured template: src: httpd.conf.j2 dest: "{{ httpd_conf.MainConfPath }}" Task Automation Ansible play Inventory Variables Ansible modules
Page - 23 # Production servers LIVE-web01 ansible_host=10.0.0.10 LIVE-web02 ansible_host=10.0.0.10 [web-farm] LIVE-web01 LIVE-web02 [backend:children] web-farm [all:vars] ansible_port=22 ansible_user=system ansible_private_key_file=~/.ssh/id_rsa Inventory Define hosts behavioral settings host vars Groups Groups of groups Group vars default groups
Page - 24 Infrastructure as Code Orchestrate cloud resources --- - name: "Allocate AWS resources" hosts: localhost connection: local tasks: - name: "Provision a new EC2 instance" ec2: instance_type: t2.micro region: us-east-1 key_name: lamp.key image: ami-123456 vpc_subnet_id: subnet-29e63245 assign_public_ip: yes
Page - 25 Application Stack Definition Ansible roles galaxy.ansible.com --- - name: "Allocate AWS resources" hosts: ... tasks: ... - name: "Setup LAMP stack on web farm hosts" hosts: web-farm roles: - role: centos - role: php - role: php-fpm - role: apache - role: mysql
Page - 26 CLOUD: - {Easy, Fast, Secure, Unlimited} - "Do not Repeat Yourself" CATCH: - abstracted("Infrastructure management") - simplified("Software delivery") - application(“Management and Operations")
Thank you for your attention! A practitioner’s tale on clouds THE END

More Related Content

A practitioner's tale on clouds

  • 1. A practitioner's tale on clouds Oπen conf, Athens, Greece 29 March 2019, Cloud day
  • 2. Page - 2 CEO and co-founder #OSATH organizer Thanassis Parathyras cloud expert, open-source enthusiast, OpenStack instructor, Ansible practitioner www.linkedin.com/in/parathyras/
  • 3. Page - 3 the cloud expectations · meaning · practice
  • 4. Page - 4 no downtime elastic resources
  • 5. Page - 5 self-service application control source: https://governance.openstack.org/tc/reference/technical-vision.html PaaS SaaS IaaS
  • 7. Page - 7 PaaS SaaS IaaS as-a-service Business model Pay as you Go - OPEX Minimizes IT fixed assets - CAPEX Managed Services
  • 10. Page - 10 Applications Data centerAutomates
  • 11. Page - 11 Applications Data center Increased Automation
  • 12. Page - 12 Ansible plays · modules · inventory · variables
  • 13. Page - 13 --- - hosts: web-farm tasks: - name: Be sure apache is installed package: name: "{{ httpd_packages }}" state: present - name: Be sure apache is configured template: src: httpd.conf.j2 dest: "{{ httpd_conf.MainConfPath }}" Task Automation Ansible play
  • 14. Page - 14 --- - hosts: web-farm tasks: - name: Be sure apache is installed package: name: "{{ httpd_packages }}" state: present - name: Be sure apache is configured template: src: httpd.conf.j2 dest: "{{ httpd_conf.MainConfPath }}" Task Automation Ansible play Ansible modules
  • 15. Page - 15 --- - hosts: web-farm tasks: - name: Be sure apache is installed package: name: "{{ httpd_packages }}" state: present - name: Be sure apache is configured template: src: httpd.conf.j2 dest: "{{ httpd_conf.MainConfPath }}" Task Automation Ansible play Ansible modules Define desired state with parameters ansible-doc
  • 16. Page - 16 A B operation
  • 17. Page - 17 A B B operation operation
  • 18. Page - 18 A B B operation operation IDEMPOTENCE
  • 19. Page - 19 Initial State Final State Ansible Ansible modules IDEMPOTENCE Ansible Final State
  • 20. Page - 20 Variables Config settings System level Application Vars defined CLI several files priority # httpd version httpd_version: "2.4.6" httpd_packages: - "httpd" - "mod_ssl" # httpd.conf options httpd_conf: ServerRoot: "/etc/httpd" MainConfPath: "/etc/httpd/conf/httpd.conf" DocumentRoot: "/var/www" ListenPort: - "80" - "443"
  • 21. Page - 21 --- - hosts: web-farm vars_files: - path/to/htppd.vars tasks: - name: Be sure apache is installed package: name: "{{ httpd_packages }}" state: present - name: Be sure apache is configured template: src: httpd.conf.j2 dest: "{{ httpd_conf.MainConfPath }}" Task Automation Ansible play Variables Ansible modules
  • 22. Page - 22 --- - hosts: web-farm vars_files: - path/to/htppd.vars tasks: - name: Be sure apache is installed package: name: "{{ httpd_packages }}" state: present - name: Be sure apache is configured template: src: httpd.conf.j2 dest: "{{ httpd_conf.MainConfPath }}" Task Automation Ansible play Inventory Variables Ansible modules
  • 23. Page - 23 # Production servers LIVE-web01 ansible_host=10.0.0.10 LIVE-web02 ansible_host=10.0.0.10 [web-farm] LIVE-web01 LIVE-web02 [backend:children] web-farm [all:vars] ansible_port=22 ansible_user=system ansible_private_key_file=~/.ssh/id_rsa Inventory Define hosts behavioral settings host vars Groups Groups of groups Group vars default groups
  • 24. Page - 24 Infrastructure as Code Orchestrate cloud resources --- - name: "Allocate AWS resources" hosts: localhost connection: local tasks: - name: "Provision a new EC2 instance" ec2: instance_type: t2.micro region: us-east-1 key_name: lamp.key image: ami-123456 vpc_subnet_id: subnet-29e63245 assign_public_ip: yes
  • 25. Page - 25 Application Stack Definition Ansible roles galaxy.ansible.com --- - name: "Allocate AWS resources" hosts: ... tasks: ... - name: "Setup LAMP stack on web farm hosts" hosts: web-farm roles: - role: centos - role: php - role: php-fpm - role: apache - role: mysql
  • 26. Page - 26 CLOUD: - {Easy, Fast, Secure, Unlimited} - "Do not Repeat Yourself" CATCH: - abstracted("Infrastructure management") - simplified("Software delivery") - application(“Management and Operations")
  • 27. Thank you for your attention! A practitioner’s tale on clouds THE END