Melissa Kaulfuss MelissaKaulfuss

Conversation between Melissa Kaulfuss and George Sheppard.

mel [11:36 AM] 
joined #aws

mel 
[11:37 AM] 
sup

The issue

Yesterday when attempting to initialize /.init a Docker Container (for the first time) I got a strange error that I just assumed was down to my set up. Hadn't yet spun this up on my new machine.

The failure occurred when hitting exec bundle exec rake db:create.

The error output:

Gem::Exception: can't find executable rake for gem rake. rake is not currently included in the bundle, 
perhaps you meant to add it to your Gemfile?

Today I had to add a parameter to a request we were sending to an external API.

My unit test passed ✅ The acceptance specs did not - I had 20 failures. ❌

The failures were super cryptic, something about not being able to merge Nil:NilClass into a hash or something weirdly unrelated. One of my colleagues suspected it was to do with the VCR gem we used to simulate HTTP requests/responses from APIs.

Turns out VCR uses query strings as the key for the cassette (I did not know this). Because I'd added a param to the query string, the existing string (in the cassettes) was broken.

Go into the app folder and run: tail -f log/*

Mounting apps locally use the branch that you have checked out locally.
When you want to execute a rails type of command inside a container:
- docker-compose exec app_name <bundle update --source gem_name> where the command is the thing in the <>
try turning Docker daemon off and on again
To log in to a container to tail the logs docker-compose exec <container-name> bash then tail -f log/*logs

Nice git workflows

Keep commits small/atomic
Make use of fixup commits (for related changes) git commit --fixup sha
If responding to a request/comment in PR reply with a comment like "Done in <commit-sha>", then:

git push origin head
git rebase -i origin/master --autosquash
Once there's a nice history: git push origin head -f
git checkout master && git merge br-name --ff-only

Remember to run your specs again!
git push origin master

You can use mitmproxy which is an interactive HTTPS proxy.

Install it: brew install mitmproxy
In ted:
- go to common-services.yml
- find the relevant app_name-base ie. bookings-base, reservations-base
- add HOOROO_PROXY: "http://middleman:8080"
Middleman is best viewed in Chrome.
The URL to view it in the browser is http://middleman.ted:8081
Run the Ted start script to restart the containers ./start
Spin up Postman, use the Epic in there to create your availability, make a booking etc.

awsm tips

Logging into a particular AWS environment: AWS_PROFILE=nonprod awsm ssh

Working with blocked bookings

in Shari find the blocked action, there's a resolutions block that suggests which resolution to do, in the "Bookings Resolutions" collection in postman use correct Resolution (you may need to edit an old one if it doesn't exist yet)

	irb(main):001:0> class A
	irb(main):002:1> def self.cow
	irb(main):003:2> "hello I am a cow"
	irb(main):004:2> end
	irb(main):005:1> def moo
	irb(main):006:2> "Mooooo!"
	irb(main):007:2> end
	irb(main):008:1> end
	=> :moo
	irb(main):009:0> A.cow