Your SlideShare is downloading. ×
  • Like
Website building exercise
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×

Now you can save presentations on your phone or tablet

Available for both IPhone and Android

Text the download link to your phone

Standard text messaging rates apply

Website building exercise

  • 116 views
Published

use 5 servers to build a company web site …

use 5 servers to build a company web site
website build exercise

Published in Technology
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
    Be the first to like this
No Downloads

Views

Total Views
116
On SlideShare
0
From Embeds
0
Number of Embeds
4

Actions

Shares
Downloads
2
Comments
0
Likes
0

Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
    No notes for slide

Transcript

  • 1. 5 servers to build website A website building exercise chuenlye leo nova.leo@gmail.com
  • 2. assignment use 5 servers to build one company website: ● automation repetitive admin tasks ● make it fully operational as "production" ● complete for operation side and documentation as well
  • 3. My works some assumptions on this website: ● site purpose: a typical company website for company introduction, market brochure, information dissemination , etc. ● scale: not very big like popular social community site, but should be flexible to
  • 4. from the technical point of view ● read-intensive, not write-intensive ● redundancy/availability: it is a must ● scalability: better to let it be high scalable ● performance: not very strict, but no single point of contention is good. ● automation: it is a must in the cloud times
  • 5. Idea Design ● shared nothing architecture ● no single point of failure ● automate everything
  • 6. implementation
  • 7. 5 servers at the beginning one LB server two application server two db server(mysql replication, master/slave)
  • 8. issues one LB server: single point of failure. multiple LB servers + shared IP can fix this problem.
  • 9. issues Application servers: No single point of file system is used? session problem? store sessions in a memcached cluster, but seems not easy?
  • 10. issues DB servers: this site is considered as read-intensive, so mysql replication can be considered to be OK. one write db server and multiple read-only db servers to distribute read loads. No need partitioning/sharding and no-sql.
  • 11. details Load Balancer with apache soft lb alternatives: ● HAProxy ● Varnish ● Squid ● nginx ● …...
  • 12. details website template morph use wordpress, this exercise use drupal.
  • 13. scale: phased, incremental approach personally, scale vertically (CPU/MEM/IO/NW) is not prefered. scale horizontally for application servers scale horizontally(to some extent) for mysql servers
  • 14. automation ❖ automation of installation/configuration ❖ auto-scaling: ● half-auto by hand with chef/puppet/ansible, etc ● full-auto with auto-scaling system, like AWS auto-scaling/Scalr/RightScale/DIY
  • 15. automation details $ knife role list lb-apache # for LB sever deploy-drupal # for app server mysql-master # for master mysql-slave # for slave
  • 16. automation details we can : ● compose multiple roles for one server e.g: all-in-one 1 server system for dev/test ● create multiple servers with the same role in production environment for scalability.
  • 17. automation details LB server: use chef search to get all balancer members(app servers) automatically. members = search(:node, "role:deploy-drupal*") <% @members.sort_by{|i| i['ipaddress'] }.each do |member| %> BalancerMember http://<%= member['ipaddress'] %>:80 <% end %> chef-client can be used as a daemon to update automatically.
  • 18. Run chef from web UI ● for people who don't use chef ● simple web demo can be extended to one-click deploy system. Demo site: http://lb-server/runchef
  • 19. how to use this demo site please see operations guide. Thanks!