Docker Kubernetes course: test your workload before Kubernetes

If you are choosing a Docker Kubernetes course, learn Docker first and treat Kubernetes as a decision your workload makes, not a trend you follow. The official guides from AWS and Google both tie the choice to what you run and who will look after it, and Google's guide says to consider serverless first ⁵⁶. The survey figures that make Kubernetes look universal each count a different group of people. Before a number decides your study plan, check who was asked.

This is the first real fork on the DevOps roadmap for 2026. Below is how I check the evidence on it, with the actual sources.

Three numbers, three different groups

You will see all three of these quoted, often in the same week:

Figure	Who it counts	Who published it
82% run Kubernetes in production 1	"Container users" among CNCF survey respondents	CNCF, the foundation that hosts Kubernetes
92% use containers 2	IT professionals in Docker's survey	Docker, which sells container tools
30% use containers anywhere in their workflow 2	Developers across all industries, same survey	Docker
71.1% use Docker, 28.5% use Kubernetes 3	People who answered Stack Overflow's cloud tools question	Stack Overflow

None of these contradicts the others. The CNCF's 82% is a share of people who already use containers ¹. Stack Overflow's 28.5% is a share of a much wider group of developers ³. Docker's own report gives you both ends: 92% among IT professionals and 30% across industries ².

The lesson is simple. A percentage without its denominator is not evidence. When a post says "82% of companies use Kubernetes", it has dropped the most important words.

Read the method before the headline

Every survey has a method section, and it is usually short. Here is what three of them tell you.

Stack Overflow 2025. Fieldwork ran from late May to late June 2025, with 49,009 usable responses from 177 countries ⁴. Most respondents came through Stack Overflow's own site, emails and social posts, and the methodology itself says highly engaged users were more likely to see the prompts ⁴. So it describes active developers on one platform, not all developers. The cloud tools question was answered by about half the respondents ³.

Docker 2025. Docker's User Research Team ran a 25-minute online survey in autumn 2024, with "over 4,500" developers, engineers and tech leaders ². Docker says this year's sample was wider and less IT-focused than earlier years ². That means the jump from 80% to 92% among IT professionals compares two differently built samples. Read it as a direction, not a measured rise.

CNCF 2025. The press release gives the 82% and the comparison with 66% in 2023, but no sample size or fieldwork dates ¹. Those sit in the full report it links to. If you plan to quote the figure at work, open the full report and copy the sample size with it.

Two habits help here. First, note who sells what: Docker sells container tooling, and the CNCF hosts Kubernetes. That doesn't make their numbers wrong. It means you say so when you quote them. Second, prefer the publisher's own page over a blog that summarises it. Summaries are where denominators go missing.

What the primary docs say about when you need an orchestrator

Surveys tell you what others do. The vendor docs tell you what the tool is for, and they are more candid than marketing.

The Kubernetes documentation lists what it gives you: service discovery and load balancing, automated rollouts and rollbacks, self-healing, bin packing across nodes, handling of passwords and keys, and horizontal scaling ⁸. It also lists what it is not. It does not build your application, and it does not dictate logging, monitoring or alerting ⁸. You still need CI/CD and observability around it.

AWS's container decision guide puts orchestration services (ECS, EKS) at the level where you "need the capacity to deploy and manage up to thousands of containers" ⁵. For teams that "don't have a lot of experience with containers or infrastructure", it points to simpler services such as App Runner and Lightsail ⁵. It also says that teams running Kubernetes invest in SRE staff to handle frequent cluster upgrades, because Kubernetes has three major releases a year ⁵.

The Kubernetes project's own release page shows what that means in practice. It maintains only the three most recent minor versions, each with about a year of patch support ⁷. Version 1.34 reached end of life this month ⁷. Someone on the team has to plan each upgrade.

Google's architecture guide goes further. It recommends considering serverless (Cloud Run) first, and moving to GKE Autopilot only when the workload rules serverless out: persistent storage, long-running jobs, or a tool that depends on Kubernetes ⁶. It also notes that Kubernetes skills can take time to build ⁶. This page was last reviewed in August 2024, so it is older than the others; check it for changes before quoting it.

Docker's own docs say the easiest way to deploy a Compose app is on a single server, with production settings kept in a separate override file and a restart policy set ⁹. For a lot of internal tools, that is enough.

Docker Kubernetes course order: the signs that say not yet

Put the docs together and you get a test you can apply to your own work.

Your situation	What the sources point to
One or two services on one server	Docker and Compose on a single host 9
Small team, no one on call for clusters	A managed or serverless service 56
Stateless web app or API, spiky traffic	Serverless first, such as Cloud Run or App Runner 56
Many services across several machines, needing rollouts and self-healing	An orchestrator such as Kubernetes 58
A vendor product or tool that requires Kubernetes	Kubernetes, managed if possible 6
A team that can plan upgrades every few months	Kubernetes is workable 57

If most of your rows sit at the top, Kubernetes is not yet the problem to solve. Learn Docker well: images, networking, volumes and Compose. Those carry straight into Kubernetes later, because a pod still runs a container image.

What employers check, and why you still learn both

The workload test is about what to run. Hiring is a different question. LinkedIn's 2026 India list of fast-growing jobs names Kubernetes among the most common skills for Software Engineer, the third role on the list. The list is built from jobs LinkedIn members took up between January 2023 and July 2025 ¹⁰. So Kubernetes is worth learning. The order is the point: Docker first, then Kubernetes, then Helm and GitOps on top.

The DevOps Engineer course at TTFA follows that order, with Docker and Compose before Kubernetes workloads, Gateway API and Helm. In interviews, expect to explain why you would or would not use Kubernetes for a given app. The tables above are a fair way to answer.

What to do with this

1. List what you run, or the project you plan to build: services, servers, traffic pattern, who is on call.
2. Run it through the table above. Write down which row you are in, and why.
3. When you quote a survey, copy the denominator, the sample size and the publisher with the figure.
4. Open the vendor's own page before you trust a summary of it.

The next note in this series covers learning by breaking things: labs you can run without a job, writing runbooks as you go, and a small home cluster that teaches more than it takes in time.

Frequently asked questions

Do I need Kubernetes yet?

Probably not, if you run a few services on one or two servers with a small team. AWS and Google both point such teams to simpler managed or serverless services, and Docker's docs describe single-server Compose deployments ⁵⁶⁹. Learn it for your career, but adopt it when the workload asks for it.

Should a Docker Kubernetes course start with Kubernetes?

No. Kubernetes runs container images, so Docker images, networking and volumes come first. Starting with Kubernetes means debugging two layers at once.

Is the 82% Kubernetes figure wrong?

It is accurate for its group: container users in the CNCF survey ¹. Among all developers who answered Stack Overflow's cloud tools question, Kubernetes use was 28.5% ³. Quote either one only with its denominator.

How often does Kubernetes need upgrading?

The project releases about three minor versions a year and supports each for roughly a year ⁵⁷. Managed services ease the work, but someone still plans and tests each upgrade.