CKA / CKS discussions

Hi guys, I’m preparing to take the CKA cert and following this one I’ll be preparing for CKS

I would like to know if there is some sort of discord, group discussions of any kind, or even people interested in share some knowledge and brainstorming for the exam?

Thanks!

https://redd.it/1lrkb49
@r_devops

CKS 2025 out of killer.sh questions

Hey guys, I'm going to make my CKS exam in 3 days, I'm doing pretty fast the mock exams and i can complete the killer.sh mock exam, the thing is that i know that with that exam you cover 80% of the exam, does OPA enters? or do you remember any tricky question(like for example the /dev/mem falco rule one)

https://redd.it/1lrptpv
@r_devops

Devops as a college student

I have Devops as an ability enhancement course and next sem will start in mid August so I have approximately 1.5 months . Where should I learn devops?? So that I can implement these skills by the end of the semester

https://redd.it/1lrq9g7
@r_devops

Where do you use Go over python

I've been working as DevOps, whatever that means, for many years now and even though I do see the performance benefits of using Go, there was hardly any scenario where it seemed like a better option than a simpler language such as Python.

There is also the fact that I would like my less experienced team members to be able to read the code easily.

Despite all that, I'm seeing more and more job ads asking for Go skills.

Is there something I'm missing or is it just a trend that will fade?

https://redd.it/1lrs5mx
@r_devops

What is GitOps: A Full Example with Code

https://lukasniessen.medium.com/what-is-gitops-a-full-example-with-code-9efd4399c0ea

https://redd.it/1lrsn3k
@r_devops

How do you manage environments in Helm charts?

I always like to write my helm charts as if they might be released publicly, meaning no company/domain-specific logic in the chart. I usually have environment-specific values-<env>.yaml files living in a separate gitops repo. The issue with this is that it doesn't scale, because these values-env.yaml need to exist for every environment. They typically contain values that could be derived from the environment name, e.g. hostnames for ingresses which contain the environment name, references to secrets with the environment name etc. This means when something changes there's a lot of strings to update. Now I could just add a variable named 'env' or something to the chart, construct the strings I need from that, and call it a day, but this would couple the chart to our particular setup. I don't want to maintain a separate chart just for internal use. How do you handle this?

https://redd.it/1lrv9c2
@r_devops

4-month global builder challenge for DevOps engineers — teams, mentorship, grants, and prizes

Hey r/devops,

Wanted to share an opportunity that might resonate with those who enjoy building scalable, reliable infrastructure and automated pipelines.

The **World Computer Hacker League (WCHL)** is a 4-month global builder challenge focused on **open internet infrastructure, AI, and blockchain**. Many teams are working on projects involving deployment automation, infrastructure as code, CI/CD pipelines, monitoring, and decentralized ops tooling.

Here’s what’s on offer:

* 👥 Team-based projects only — no solo entries, but you can find teammates on Discord
* 🧠 Weekly workshops and mentorship from experienced engineers
* 💰 Grants, bounties, and milestone-based rewards
* 🌍 Open to students and independent engineers worldwide
* ⚙️ Tech and stack-agnostic — build with the tools and frameworks that fit your vision

If you’re interested in applying DevOps best practices to decentralized systems, automating cloud deployments, or managing secure infrastructure at scale, this could be a great place to experiment and build.

📌 If you’re in **Canada or the US**, register through **ICP HUB Canada & US** so we can support you directly during the challenge:
[https://wchl25.worldcomputer.com?utm\_source=ca\_ambassadors](https://wchl25.worldcomputer.com?utm_source=ca_ambassadors)

Feel free to reach out if you want to discuss project ideas or find collaborators. Would love to see some strong DevOps projects in the lineup!

https://redd.it/1lryojc
@r_devops

Ship tools as standalone static binaries

After Open AI decided to rewrite their CLI tool from TypeScript to Rust, I decided to post about why static binaries are a superior end-user experience.

I presumed it was obvious, but it seems it isn't, so I wrote in detail about why tools should be shipped as static binaries.

https://redd.it/1ls28s6
@r_devops

Looking for a small team to build and learn together this summer

Hey r/devops,

I’m hoping to find a few people interested in teaming up to work on a practical project this summer. Something hands-on around infrastructure, automation, or tooling, where we can learn from each other and get real experience.

I’ve been mostly working with cloud tools and some scripting lately, but want to try collaborating with others instead of working solo. No pressure or fancy plans, just a group of folks who want to build and improve together.

If this sounds like your vibe, please reply or DM. I’d love to hear what you’re working on or want to try.

https://redd.it/1ls2k8h
@r_devops

Suggestions Required How are you handling alerting for high-volume Lambda APIs without expensive tools like Datadog?

I run 8 AWS Lambda functions that collectively serve around 180 REST API endpoints. These Lambdas also make calls to various third-party services as part of their logic. Logs currently go to AWS CloudWatch, and on an average day, the system handles roughly 15 million API calls from frontends and makes about 10 million outbound calls to third-party services.

I want to set up alerting so that I’m notified when something meaningful goes wrong — for example:

Error rates spike on a specific endpoint
Latency increases beyond normal for certain APIs
A third-party service becomes unavailable
Traffic suddenly spikes or drops abnormally

I’m curious to know what you all are using for alerting in similar setups, or any suggestions/recommendations — especially those running on Lambdas and a tight budget (i.e., avoiding expensive tools like Datadog, New Relic, CW Metrics, etc.).

Here’s what I’m planning to implement:

Lambdas emit structured metric data to SQS
A small EC2 instance acts as a consumer, processes the metrics
That EC2 exposes metrics via `/metrics`, and Prometheus scrapes it
AlertManager will handle the actual alert rules and notifications

Has anyone done something similar? Any tools, patterns, or gotchas you’d recommend for high-throughput Lambda monitoring on a budget?

https://redd.it/1ls42jv
@r_devops

What are the type of things you do as a DevOps manager?

I'm assuming some of the people that work here are in Management Roles. And I get the general gist of it, but what have you been up to the past year, maybe something concrete, any stumbling blocks. Just looking to hear some stories.

https://redd.it/1ls69qd
@r_devops

I'm Trying to Learn AWS Cloud but Feel Lost — How Do I Learn It Practically, Not Just Theoretically?

Hi everyone,

I’ve started learning AWS cloud computing recently, and while I’m going through a lot of resources and reading about different services like EC2, S3, IAM, and so on — I still feel like I’m learning it only theoretically. I don’t feel confident or job-ready, and honestly, I’m not sure where to go from here.

I understand the concepts, but when it comes to doing something practical (like provisioning infrastructure, launching services, or setting up a simple project), I freeze. I’ve watched tutorials and gone through courses, but I still feel like I'm just memorizing terms.

I really want to gain hands-on experience, but I’m not sure how to do that the right way:

Should I follow specific labs?
Should I just start a small project and learn as I go?
What’s the best way to move from “understanding” to “doing”?
Are there platforms that give you guided exercises using the AWS Console or CLI?

Any advice, personal experience, or practical tips you have would really help me out. I’m committed to learning, I just don’t want to waste more time feeling lost.

Thanks in advance!

https://redd.it/1lsdd2k
@r_devops

Istio and a small architecture

I’m trying to build a small microservice to practice with the Istio Bookinfo sample app, and I’d appreciate some advice. My current plan is to have one master node (first VM) and two worker nodes (two additional VMs). The last VM might be used for Jenkins, but I’m not sure if that’s the best approach.

What would be a recommended architecture for this setup? I definitely want to use NGINX for load balancing and as an ingress controller, Prometheus for monitoring, and Jenkins for automation. Should I also include Helm and ArgoCD?

I don’t have much experience with architecture planning, so I’d like to know what other technologies or tools I should consider for a microservices environment besides the ones mentioned above.



https://redd.it/1lse090
@r_devops

Is Terraformer used out there?

So I have thought back of a project in my consulting carreer where we had the task make the existing system IaC with Terraform (and more tasks). So we did this:

For each service type, we listed the existing services (via aws cli or sometimes web console), and for each result we created an empty resource, like so:

resource "aws_s3_bucket" "mybucket" { }

Then we did terraform import aws_s3_bucket.mybucket real-bucket-name. Then we looked at the imported configs via terraform show and pasted the corresponding config into the created empty config.

And this for each listing, for each service. This took a long time and we had to still do a "clean up". So I just wondered:
1. How do you guys approach such a task?
2. Do you use tools such as Terraformer that supposedly make this much quicker? I've heard mixed things about them.

https://redd.it/1lsgr36
@r_devops

How often do you actually write scripts?

Context on me - work in tech consulting/professional services. I’m places out to clients by my employer on short-long range contracts/projects.

Primarily as a Senior Platform Engineer and DevOps Engineer.

95% of the time the past 4 years I’ve only wrote Terraform or YAML.

I think I maybe wrote 4 Python Scripts and 3 Bash Scripts.

Every job ad requires Python/Bash and more so Golang nowadays.

I try to do things outside or work for personal projects to keep up to date. But it’s difficult now as a parent. Every time it comes to write a script, I need to refresh myself on Python.

Am I the only one? My peers feel the same and the clients I’m at, some of their staff don’t even know how to code.

https://redd.it/1lsi7zi
@r_devops

here are some handy and free ebooks for troubleshooting Kubernetes and prepping for the CKA exam

If you’re gearing up for the CKA or just want some solid hands-on experience with real cluster issues, I stumbled upon a couple of ebooks that are filled with practical scenarios; think OOMKilled errors, readiness failures, DNS misconfigurations, and more.

If you’ve come across any other resources like this, I’d love to hear about them.

(Links in comments)

https://redd.it/1lsj3mh
@r_devops

Devops consulting

Hey buddies
I have been in the field for roughly 3+ years, and I hold 3 AWS certifications and the CKA, and have a solid experience with most of main devops tools.
I plan to start a consulting business, where I provide devops consulting and maybe some type of retainer support later.
Anyone who have some ideas in mind and can help me kick off this journey?

PS: We are two persons, my friend have a similar experience more or less

https://redd.it/1lsmz0b
@r_devops

What are your go-to tools/methods for reproducible, shareable, disposable dev/ops environments? (Nix, Docker, Devcontainer, etc.)

Hey all,

I’m curious—what tools or approaches do you use to create, share, and easily switch between different development or DevOps environments?
I’m looking for solutions that allow for reusable, disposable, and easily shareable environments (for onboarding, reproducibility, or just avoiding the dreaded “works on my machine” issues).

Some examples I’m considering:
• Nix / Nix Shell / Nix Flakes
• Dockerfiles for fully isolated, portable environments
• Devcontainers (VSCode, Codespaces)
• asdf, pyenv, venv, pipx
• Vagrant, Homebrew Bundle, NixOS
• Custom bootstrap scripts, dotfiles, etc.

What actually works for you?
• For what use cases? (dev, ops, CI/CD, data, etc.)
• Onboarding and ease of use (solo vs team)
• Limitations, gotchas, or workflow-specific experiences?
• Favorite combos, clever tricks, “must-have” automation?

I’d love to hear your real-world experiences, best practices, and recommended tools or setups for reproducible, isolated, and shareable environments.

Thanks in advance for any advice, horror stories, or setup ideas 🚀

https://redd.it/1lswzls
@r_devops

Is Judge0 the right way to run user code for a hobby site?

I’m making a website where i need to let untrusted user code hit public APIs during execution while blocking everything else (internal IPs, metadata endpoints, crypto mining pools, blah blah blah….). Looking for proven patterns / tools.

Best thing I've found online that’s open-source is Judge0, so i was wondering. Have any if you have used it, or anything similar?

I’d really appreciate pointers to blog posts, GitHub examples, or your own configs. Trying to ship publicly soonish without waking up to a surprise AWS bill or a CVE headline, because someone has tried to mine crypto on my servers.

https://redd.it/1lsxdkf
@r_devops

is learning devops a good ideal for data science and llm engineering?

i was first thinking of learning mlops, but if we gonna learn ops, why not learn it all, I think a lot of llm and data science project would need some type of deployment and maintaining it, that's why I am thinking about it

https://redd.it/1lt0jjq
@r_devops

Maybe humans don't need to write documentation for humans anymore?

With tools like Devin wiki starting to generate human-readable documentation from code, shouldn't we shift our focus? Instead of humans writing docs for other humans, we could have AI generate those on-demand when needed.

What humans should focus on is creating documentation for AI - the stuff that can't be extracted from GitHub repos alone. Things like design rationale, decision-making processes, considerations that were explored, task contexts, etc. We should be building environments where humans can effectively pass this kind of contextual knowledge to AI systems.

Thoughts?

https://redd.it/1lt2g73
@r_devops