Published at February 5, 2019 · 1 min read
Nobody likes boring and routine tasks at all. It’s a good idea to do something interesting and challenging each day. I’m sure that you can find such a task on any kind of job you have. You just need to find 5-10 minutes for it and you’ll find something interesting to do.
I failed today. Only boring ad routine tasks during the day. I’ll do my best to fix this tomorrow and post something interesting for you.
...OpenStack Horizon: integration tests for plugins (part 2, CI)
Published at February 4, 2019 · 2 min read
It’s a small addition to my previous post. I don’t like to edit my previous posts. The only exception is when I have to fix some typos, spelling error, links, etc.
During the previous post, I described how to implement integration tests for the Horizon plugins, but I didn’t have enough time to implement and verify CI for it. It’s time to fix this.
We’ve got really awesome CI in the OpenStack. Zuul works great for OpenStack needs and allows to configure cross-project jobs. A big thank you to our Infra team for the help during CI setup.
...Using JSX outside React application
Published at February 3, 2019 · 1 min read
I’m not a fan of the React at all. I prefer to use VueJS wherever it’s possible. But React is really one of the most popular JavaScript libraries now. There are a lot of people who use it and like it.
One of the most important parts of React is JSX - “a syntax extension to JavaScript. It is similar to a template language, but it has full power of JavaScript”. Honestly, it’s the one reasons why I don’t like React. But if you’re using React, it’s really painful to not use JSX too.
...Dependencies management: versioning
Published at February 2, 2019 · 2 min read
It’s a really complicated topic. Almost everyone has own opinion on it. I’ll try to describe you several patterns with pros and cons for each.
It doesn’t matter if it’s a python dependency in requirements.txt or a javascript one in package-lock.json file.
What could go wrong? First of all, there are several approaches how dependency could be described:
It’s a great approach for development on early stages. You always use the latest version and you’ll be notified soon if your application stopped to work. On the other hand, it’s a nightmare for production deployment. Everything could stop work at any moment after any operating system update.
...OpenStack Horizon: integration tests for plugins
Published at February 1, 2019 · 3 min read
Ideally, I need to push this post into the Horizon documentation, but I would like to publish it here as HOTO for me before everything will be approved and I move this into the official documentation.
About one week ago we, finally, included integration tests job to our gates in non-voting mode. A big thanks to everyone who helped to get this done. We’ve got about 80 integrations tests in the horizon repository. Also, it could be used as a base framework to implement tests for plugins. Unfortunately, these tests work only with python2 now, but we’re going to fix it soon.
...Published at January 31, 2019 · 1 min read
It was some kind on New Year challenge for me to write a post every day. Something went good, something not but I feel pretty good on this initiative and want to continue. It’s really hard to post something every day. I started to post some notes that don’t feet into Twitter’s limit. There are a lot of drafts in progress so I’ll try post more technical things next month.
...Published at January 30, 2019 · 2 min read
Continuing the topic from the previos post about project configuration, I would like to metion one more important thing. It’s a config inheritance or config overriding. I don’t want to argue if my approach is good or not. I just like it and I try to follow it wherever it’s possible.
I will write about possible configuration location in the order where the next level will override the previous one:
Default values in the code. It’s a common location for defaults if it’s possible. Sometimes you can’t have any default value due to the different reasons.
...The Price of Open Source Software
Published at January 29, 2019 · 1 min read
Open source software is not free. Sometimes it’s not cheap at all. It even could be more expensive than some proprietary software with any high price.
I like Open Source. I use it. I contribute to some open source project even on my personal time. But you must know, that price for the open source software could be very high.
You always need to think about how many time do you spend during troubleshooting/deploying/fixing or improving some open source software. It could take a lot of time for it. Sometimes it’s better and cheaper than open source.
...Published at January 28, 2019 · 2 min read
Once your project becomes a bit bigger than ‘Hello, World’, you need to add an ability to configure it. It could be config in the code like in Django or Flask, pass environment variables, CLI arguments or a special config file located somewhere in the filesystem.
At this point, everyone should ask themselves this question: What should I consider as a default option? Should it be production-like or developers friendly options?
...Code review: why do we need it?
Published at January 27, 2019 · 1 min read
I don’t want to argue about necessary of code review now. It’s to each team to specify rules on how to do it. I just want to share with you my opinion why do we need it on each project.