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local_demo.md

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Build/Test National-Parks App Locally:

  1. Clone this repo
  2. cd national-parks-demo
  3. Export environment variables to forward ports on the export HAB_DOCKER_OPTS='-p 8000:8000 -p 8080:8080 -p 8085:8085 -p 9631:9631'
  4. hab studio enter
  5. build
  6. source results/last_build.env
  7. Load core/mongodb package from the public depot:
    hab svc load core/mongodb/3.2.10/20171016003652
  8. Override the default configuration of mongodb: hab config apply mongodb.default $(date +%s) habitat/mongo.toml
  9. Load the most recent build of national-parks: hab svc load $pkg_ident --bind database:mongodb.default
  10. Load core/haproxy from the public depot: hab svc load core/haproxy --bind backend:national-parks.default
  11. Override the default configuration of HAProxy: hab config apply haproxy.default $(date +%s) habitat/haproxy.toml
  12. Run sup-log to see the output of the supervisor

You should now be able to hit the front end of the national-parks site as follows:

  • Directly - http://localhost:8080/national-parks
  • HAProxy - http://localhost:8085/national-parks

You can also view the admin console for HAProxy to see how the webserver was added dynamically to the load balancer:

http://localhost:8000/haproxy-stats

username: admin
password: password

Build a new version of the application

There is also an index.html file in the root of the repo that updates the map of the National-Parks app to use red pins and colored map. This can be used to demonstrate the package promotion capabilities of Habitat.

  1. create a new feature branch - git checkout -b update_homepage
  2. Bump the pkg_version in habitat/plan.sh
  3. Overwrite src/main/webapp/index.html with the contents of the red-index.html in the root directory _NOTE: the index.html has a version number hard coded on line 38. Update that to your version number if you want it to match.
  4. hab studio enter
  5. build

What's next?

We would recommend proceeding with any of the following demos to learn more about running habitat in production.