Self hosted server applications - Adam Horvath
- 1. Self hosted server applications Why and how to pack the kitchen sink into your server Presenter: Adam Horvath (adam@teamleadnet.com) 21 Mar 2013, DevOps Sydney Adam Horvath 1
- 2. Who had any problems with… • Differences in – Runtime/library environment in dev and prod – Configuration settings in dev and prod • Setting up A-B testing • Setting up load balancing • Rolling out a new version to a subset of users • Rolling back a malfunctioning version 21 Mar 2013, DevOps Sydney Adam Horvath 2
- 3. Data, Binary, Runtime, Config • Data is anything that the user creates – Files – Database entries • Binary is anything that works or supports work – Compiled binaries – Script files – Images, styles • Runtime is anything that Binary requires – Framework – Application server • Config is anything that advises binary how to behave – Config file – Command line parameter 21 Mar 2013, DevOps Sydney Adam Horvath 3
- 4. Binary (Code) HTTP Configuration files Database Server User data (Images, files) Runtime libraries 21 Mar 2013, DevOps Sydney Adam Horvath 4
- 5. Pack in everything you’d need • Storage is cheap – Store as many binary packages as you want • The binary package is a ‘throwaway’ container – Adding/removing does not affect the system • All Binary is internal • Most runtime is internal • Some configuration is external • All data is external 21 Mar 2013, DevOps Sydney Adam Horvath 5
- 6. Self hosting • Think in small services • Reduce external dependencies – Ship the application servers with the app – HTTP server – Static content server – Health monitor server • Run as a simple console application • Embed most of the configuration – Required config in command line - fail early • Make directory, port, environment irrelevant • Collect health information centrally 21 Mar 2013, DevOps Sydney Adam Horvath 6
- 7. Forwarding requests • Treat the external webserver as a forwarder • Use a lightweight HTTP server like nginx • What belongs here is – Rollout plan to internal users first – Rollout plan to small percentage of live users – A-B testing – Dynamic load balancing • Tip – set up your own DNS 21 Mar 2013, DevOps Sydney Adam Horvath 7
- 8. HTTP Server User data Binary (Code) (Images, files) HTTP Runtime libraries Server Database 21 Mar 2013, DevOps Sydney Adam Horvath 8
- 9. URLs • This presentation http://bit.ly/devops-selfhosted • nginx http://nginx.org/ • dnsmasq http://www.thekelleys.org.uk/dnsmasq 21 Mar 2013, DevOps Sydney Adam Horvath 9
- 10. Questions Adam Horvath (adam@teamleadnet.com) 21 Mar 2013, DevOps Sydney Adam Horvath 10