6 ms·

Bullet Train: Open-source feature flagging

• hbcondo714 6y ago
  Not to be confused with the Ruby on Rails SaaS template Bullet Train: https://bullettrain.co/ https://bullettrain.co/
  • nullsense 6y ago
    When I read the headline this is the product I was thinking of. Almost exact same domain name even. Yikes.
  • ta1234567890 6y ago
    Thank you, thought it was about that one and was going to say it's really good, has a great community and amazing support, would definitely recommend for anyone who has experience with rails and wants to start a new project but not completely from scratch - definitely worth the money ($1.5k IIRC).
  • davidtranjs 6y ago
    Thanks, I found this template yesterday and almost getting a wow because I see it on HN today.
  • michaelbuckbee 6y ago
    Yeah, I feel like the name doesn't really fit for feature flags as a service either.
  • 1kevgriff 6y ago
    Brand confusion... yay.
• branding123 6y ago
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• rwmj 6y ago
  I couldn't work out what this does. A library for mapping booleans to and from strings?
  • dabeeeenster 6y ago
    Hi - we're a feature flagging platform. You can put new features that you are working on behind boolean flags and then manage those features from our dashboard.
    • rwmj 6y ago
      Still unclear! "Feature" means a software feature? For example "I've implemented the feature of sorting customer records by date of birth"? I don't really understand why anyone would need a service to manage software features, so maybe feature means something else.
      • dabeeeenster 6y ago
        We have an overview of why you might like to use a feature flagging platform here: https://docs.bullet-train.io/overview https://docs.bullet-train.io/overview Hopefully that helps!
        • kristopolous 6y ago
          This sounds like it could easily and quickly lead to really poor bug reproducibility, documentation, and discovery especially if the issue is in action-at-a-distance anti-patterns. Am I just being a curmudgeon or is this a reality? I'll happily accept a "no you're crazy".
          • tashoecraft 6y ago
            This is used extensively. X customer wants to test y feature, but z customer is the middle of a large test and refuses to see c feature. Roll out feature to test client, slowly roll out feature to each client. Something to wrong? It’s incredibly fast to update the flags.
• johnsonk1989 6y ago
  Had to upvote, been using it for around 6 months, I couldn't imagine starting a project without it now.
• wdb 6y ago
  I wish there were more examples how to use feature flags. How would you test a feature flag e.g. Halloween discount. As this probably involves both front-end and back-end code. The only way I can think off how this can be tested is by making a special new user with this feature flag. But do you now need to test all possible permutations of the flags combinations? If so, how to determine these permutations? Can imagine you test all possibilities every time??
  • mynegation 6y ago
    I have an example from a different area. We are developing a batch process that runs multiple stages over multiple hours on a huge cluster producing some kind of numerical results. We also can not deploy to production on a whim, due to regulation. It is impossible to test all developer changes on a full process. So we put highest risk changes under feature flags/configuration values. If certain things do not work as expected in testing - we disable them with configuration without creating a new build artifact. It is also a common occurrence that another team has to validate numerical results Coming from a certain feature for a while before it is enabled in production.
• _hao 6y ago
  Why would I use this instead of the feature flagging capabilities provided by Azure for example?
  • dabeeeenster 6y ago
    Hi - thanks for the question! I'm one of the founders. There are a few options for people when it comes to feature flags. Some options, like Azure, are features of larger platforms, others come at feature flagging from more of an A/B testing angle. In terms of Bullet Train: - We focus on feature flags. We're not going to build out features that are not core to that offering. We're not going to build an analytics platform for running AB tests as we think using a dedicated analytics solution makes a lot more sense. - Our flags can be booleans, strings, ints or floats and can be overridden on a per environment basis. - We offer flags based on dynamic user segments, percentage splits/rollouts and are about to release multivariate flags with ABN testing capability. - We have lightweight, low dependency SDKs for the majority of languages and frameworks that don't get in your way. - You can run our platform yourself, with us, or we can help you run it on-premise. Our architecture is straightforward and can be up and running in a couple of minutes via docker-compose. - All our dashboard and API code, as well as our SDKs, is open source and BSD-3 licensed. At the end of the day it depends on what you are looking for, and what tooling you are currently using.
• amelius 6y ago
  The example showing "high_spenders" and conditions like "money_spent >= 100", feels unsettling, and reeks of user-tracking and discrimination. Can we please stop these patterns?
  • bengale 6y ago
    This seems like a really odd take. Why would any business not want to identify high value customers?
    • amelius 6y ago
      Ah, but you're looking from the perspective of the business, not the customer.
• Game_Ender 6y ago
  If you are interested in this space and don't want to purchase a commercial product, check out Flagr [0] which you can deploy and run yourself. It has clients for Go, Python, Ruby and JavaScript. I have only used the basic flagging, but it also supports A/B testing as well. No affiliation, just a happy customer. 0 - https://checkr.github.io/flagr https://checkr.github.io/flagr
  • mohon 6y ago
    I'm curious, how do you setup your deployment and the scale of Flagr? The only thing I could found is this [0] [0] - https://github.com/checkr/flagr/issues/139#issuecomment-402867369 https://github.com/checkr/flagr/issues/139#issuecomment-4028...
• funkaster 6y ago
  I’m curious, what everyone wants to see in a feature flagging service? privacy? (gdpr, caap) %rollout? flexibility on rules? from my perspective the most important thing would be privacy and ideally no sdk, but I acknowledge that I might be bias...