Why is Kubernetes getting so popular? • Hacker News Board

Re: Why is Kubernetes getting so popular?

#111

Post by base698 » Fri, May 29, 2020, 9:30 PM UTC

MuffinFlavored wrote: post #90

base698 wrote: post #30

Earlier quoted context omitted.

For the nginx ingress case: An ingress object creates an nginx/nginx.conf. That nginx server has an IP address which has a round robin IPVS rule. When it gets the request it proxy's to a service ip which then round robins to the 10.0.0.0/8 container IP. Ingress -> service -> pod It is all very confusing but once you look behind the curtain it's straight forward if you know Linux networking and web servers. The cloud…

> It is all very confusing Is there an easier + simpler alternative?

Use Heroku, AppEngine, or if in k8s, Knative/Rio.

It's confusing because a lot of people being exposed to K8s don't necessarily know how Linux networking and web servers work. So there is a mix of terminology (services, ingress, ipvs, iptables, etc) and context that may not be understood if you didn't come from running/deploying Linux servers.

Re: Why is Kubernetes getting so popular?

#112

Post by closeparen » Fri, May 29, 2020, 9:32 PM UTC

2kewl4skewl wrote: post #63

closeparen wrote: post #26

What does the Kubernetes configuration format offer over configuration management systems like Ansible, Salt, Puppet, Chef, etc?

Containers are the big difference. Kubernetes is one way to deploy containers. Configuration systems like Ansible/Salt/Puppet/Chef/etc are another way to deploy containers. Kubernetes also makes it possible to dynamically scale your workload. But so does Auto Scaling Groups (AWS terminology) and GCP/Azure equivalents. The reality is that 99% of users don't actually need Kubernetes. It introduces a huge amount of comp…

Hm. Systemd already runs all your services in cgroups, so the same resource limit handles are available. It doesn't do filesystem isolation by default, but when we're talking about Go / Java / Python / Ruby software does that even matter? You statically link or package all your dependencies anyway.

Re: Why is Kubernetes getting so popular?

#113

Post by mfer » Fri, May 29, 2020, 9:32 PM UTC

silviogutierrez wrote: post #20

mfer wrote: post #8

Earlier quoted context omitted.

Out of curiosity, are you using terraform to deploy k8s, your app stack on k8s, or both?

So terraform is a higher-order, meta-Kubernetes. It's very rarely used, but who provisions the cluster itself? That's terraform. So terraform creates the cluster, DNS and VPC. Then k8s runs pretty much everything.

How are you deploying the workloads into the cluster? Manual kubectl or Helm, GitOps with something like Flux, something else?

Re: Why is Kubernetes getting so popular?

#114

Post by tombert » Fri, May 29, 2020, 9:32 PM UTC

silviogutierrez wrote: post #4

For me, and many others: infrastructure as code. Kubernetes is very complex and took a long time to learn properly. And there have been fires among the way. I plan to write extensively on my blog about it. But at the end of the day: having my entire application stack as YAML files, fully reproducible [1] is invaluable. Even cron jobs. Note: I don't use micro services, service meshes, or any fancy stuff. Just a plain…

Swarm is still supported and works. I have it running on my home server and love it.

Kubernetes is fine, but setting it up kind of feels like I'm trying to earn a PhD thesis. Swarm is dog-simple to get working and I've really had no issues in the three years that I've been running it.

The configs aren't as elaborate or as modular as Kubernetes, and that's a blessing as well as a curse; it's easy to set up and administer, but you have less control. Still, for small-to-mid-sized systems, I would still recommend Swarm.

Re: Why is Kubernetes getting so popular?

#115

Post by Turbots » Fri, May 29, 2020, 9:33 PM UTC

kgraves wrote: post #102

As a manager i've heard in all my meetings about 'kubernetes', had a look at it and have always been questioning the cost to manage this. What is the cheapest way to setup a production kubernetes on a cloud provider?

Google kubernetes engine offers small, fully managed clusters for like 200-300 bucks a month

Re: Why is Kubernetes getting so popular?

#116

Post by JackRabbitSlim » Fri, May 29, 2020, 9:33 PM UTC

I get the feeling K8 is the modern PHP. Software that's easy to pick up and use without complete understanding and get something usable. Even if its not efficient and results in lots of technical debt.

And like PHP, it will be criticised with the power of hind sight but will continue to be used and power vast swaths of the internet.

Re: Why is Kubernetes getting so popular?

#117

Post by pyrophane » Fri, May 29, 2020, 9:34 PM UTC

Honestly, at least with GKE, hosting applications on managed k8s is not that complicated, to the point that I don't think it is a poor choice even for small teams who might not need all the bells and whistles of k8s. That is, so long as that small team is already on board with CI and containers.

Re: Why is Kubernetes getting so popular?

#118

Post by tristor » Fri, May 29, 2020, 9:35 PM UTC

The simple answer is that Kubernetes isn't really any of the things it's been described as. What it /is/, though, is an operating system for the Cloud. It's a set of universal abstraction layers that can sit on top of and work with any IaaS provider and allows you to build and deploy applications using infrastructure-as-code concepts through a standardized and approachable API.

Most companies who were late on the Cloud hype cycle (which is quite a lot of F100s) got to see second-hand how using all the nice SaaS/PaaS offerings from major cloud providers puts you over a barrel and don't have any interest in being the next victim, and it's coming at the same time that these very same companies are looking to eliminate expensive commercially licensed proprietary software and revamp their ancient monolithic applications into modern microservices. The culimination of these factors is a major facet of the growth of Kubernetes in the Enterprise.

It's not just hype, it has a very specific purpose which it serves in these organizations with easily demonstrated ROI, and it works. There /are/ a lot of organizations jumping on the bandwagon and cargo-culting because they don't know any better, but there are definitely use cases where Kubernetes shines.

Re: Why is Kubernetes getting so popular?

#119

Post by shakil » Fri, May 29, 2020, 9:36 PM UTC

spyspy wrote: post #101

shakil wrote: post #99

Call me biased [1] but K8s will take over the world! Yes you get containers and micro-services and all that good stuff, but now with Anthos [2] its also the best way to achieve multi-cloud and hybrid architectures. What's not to like! 1. I work for GCP 2. https://cloud.google.com/anthos/gke

Is there any benefit of Anthos over deploying straight to GKE if you're already bought into GCP? We've had this debate several times recently and can't come up with a good answer.

If you are bought in to GCP and plan to stay there, then maybe not much. OTOH, Anthos would allow you to do easier migrations from on-prem, support hybrid workloads, or consolidate multi-cloud clusters including those running on say, AWS [1] if you like.

1. https://cloud.google.com/blog/topics/anthos/multi-cloud-feat...

Re: Why is Kubernetes getting so popular?

#120

Post by verdverm » Fri, May 29, 2020, 9:37 PM UTC

tristor wrote: post #118

The simple answer is that Kubernetes isn't really any of the things it's been described as. What it /is/, though, is an operating system for the Cloud. It's a set of universal abstraction layers that can sit on top of and work with any IaaS provider and allows you to build and deploy applications using infrastructure-as-code concepts through a standardized and approachable API. Most companies who were late on the Clo…

Yes, people ought to do a side by side comparison of a new user learning to K8S v AWS v GCP before claiming Kubernetes adds more complexity than it returns in benefits.

Remember the first time you saw the AWS console? And the last time?