RVU’s Cloud Native Transformation with Paul Ingles

Some highlights of the show include:

• The company’s cloud native journey, which accelerated with the acquisition of Uswitch. 
• How the company assessed risk prior to their migration, and why they ultimately decided the task was worth the gamble.
• Uswitch’s transformation into a profitable company resulting from their cloud native migration.
• The role that multidisciplinary, collaborative teams played in solving problems and moving projects forward. Paul also offers commentary on some of the tensions that resulted between different teams.
• Key influencing factors that caused the company to adopt containerization and Kubernetes. Paul goes into detail about their migration to Kubernetes, and the problems that it addressed. 
• Paul’s thoughts on management and prioritization as CTO. He also explains his favorite engineering tool, which may come as a surprise. 

Links:

• RVU Website: https://www.rvu.co.uk/
• Uswitch Website: https://www.uswitch.com/
• Twitter: https://twitter.com/pingles
• GitHub: https://github.com/pingles

Transcript

Announcer: Welcome to The Business of Cloud Native podcast, where we explore how end users talk and think about the transition to Kubernetes and cloud-native architectures.

Emily: Welcome to The Business of Cloud Native. I'm your host, Emily Omier, and today I am chatting with Paul Ingles. Paul, thank you so much for joining me.

Paul: Thank you for having me.

Emily: Could you just introduce yourself: where do you work? What do you do? And include, sort of, some specifics. We all have a job title, but it doesn't always reflect what our actual day-to-day is.

Paul: I am the CTO at a company called RVU in London. We run a couple of reasonably big-ish price comparison, aggregator type sites. So, we help consumers figure out and compare prices on broadband products, mobile phones, energy—so in the UK, energy is something which is provided through a bunch of different private companies, so you've got a fair amount of choice on kind of that thing. So, we tried to make it easier and simpler for people to make better decisions on the household choices that they have. I've been there for about 10 years, so I've had a few different roles. So, as CTO now, I sit on the exec team and try to help inform the business and technology strategy. But I've come through a bunch of teams. So, I've worked on some of the early energy price comparison stuff, some data infrastructure work a while ago, and then some underlying DevOps type automation and Kubernetes work a couple of years ago.

Emily: So, when you get in to work in the morning, what types of things are usually on your plate?

Paul: So, I keep a journal. I use bullet journalling quite extensively. So, I try to track everything that I’ve got to keep on top of. Generally, what I would try to do each day is catch up with anybody that I specifically need to follow up with. So, at the start of the week, I make a list of every day, and then I also keep a separate column for just general priorities. 

So, things that are particularly important for the week, themes of work going on, like, technology changes, or things that we're trying to launch, et cetera. And then I will prioritize speaking to people based on those things. So, I'll try and make sure that I'm focusing on the most important thing. I do a weekly meeting with the team. So, we have a few directors that look after different aspects of the business, and so we do a weekly meeting to just run through everything that's going on and sharing the problems. We use the three P's model: so, sharing progress problems and plans. And we use that to try and steer on what we do. And we also look at some other team health metrics. 

Yeah, it's interesting actually. I think when I switched from working in one of the teams to being in the CTO role, things change quite substantially. That list of things that I had to care about increase hugely, to the point where it far exceeded how much time I had to spend on anything. So, nowadays, I find that I'm much more likely for some things to drop off. And so it's unfortunate, and you can't please everybody, so you just have to say, “I'm really sorry, but this thing is not high on the list of priorities, so I can't spend any time on it this week, but if it's still a problem in a couple of weeks time, then we'll come back to it.” But yeah, it can vary quite a lot.

Emily: Hmm, interesting. I might ask you more questions about that later. For now, let's sort of dive into the cloud-native journey. What made RVU decide that containerization was a good idea and that Kubernetes was a good idea? What were the motivations and who was pushing for it?

Paul: That's a really good question. So, I got involved about 10 years ago. So, I worked for a search marketing startup that was in London called Forward Internet Group, and they acquired USwitch in 2010. And prior to working at Forward, I'd worked as a consultant at ThoughtWorks in London, so I spent a lot of time working in banks on continuous delivery and things like that. And so when Uswitch came along, there were a few issues around the software release process. Although there was a ton of automation, it was still quite slow to actually get releases out. We were only doing a release every fortnight. And we also had a few issues with the scalability of data. 

So, it was a monolithic Windows Microsoft stack. So, there was SQL Server databases, and .NET app servers, and things like that. And our traffic can be quite spiky, so when companies are in the news, or there's policy changes and things like that, we would suddenly get an increase in traffic, and the Microsoft solution would just generally kind of fall apart as soon as we hit some kind of threshold. So, I got involved, partly to try and improve some of the automation and release practices because at the search start-up, we were releasing experiments every couple of hours, even. 

And so we wanted to try and take a bit of that ethos over to Uswitch, and also to try and solve some of the data scalability and system scalability problems. And when we got started doing that, a lot of it was—so that was in the early heyday of AWS, so this was about 2008, that I was at the search startup. And we were used to using EC2 to try and spin up Hadoop clusters and a few other bits and pieces that we were playing around with. And when we acquired Uswitch, we felt like it was quickest for us to just create a different environment, stick it under the load balancer so end users wouldn't realize that some requests was being served off of the AWS infrastructure instead, and then just gradually go from there. We found that that was just the fastest way to move. 

So, I think it was interesting, and it was both a deliberate move, but it was also I think the degree to which we followed through on it, I don't think we'd really anticipated quite how quickly we would shift everything. And so when Forward made the acquisition, I joined summer of 2010, and myself and a colleague wrote ...