DevNinjas Dojo · Learn in your browser
Dojo is included at no extra charge in all DevNinjas workshops and corporate training. Depending on the topic, you generally use your own Kubernetes clusters, virtual machines or containers in the browser. No local installation.
Your complete Linux training environment, right in your browser.
DevNinjas Dojo is the browser-based learning and practice environment for hands-on workshops. It is included at no extra charge in all DevNinjas workshops and corporate training. You work in a full Linux terminal, with a code editor available directly in your browser. The tools you need are preinstalled, and you can install additional software as needed. A graphical desktop environment is also included when the topic requires it.
You get straight to the exercises, without having to set up your computer first.
Always included
Work in a complete Linux environment. The tools you need for the workshop are already installed, and you can install additional software yourself.
Ready for your first command, with no local installation.
Always included
Edit code, scripts, configuration files and YAML files right next to the terminal.
Varies by workshop
The setup depends on the workshop. You can install additional software within your environment.
When required
A suitable desktop interface is available for workshops that use graphical tools.
Examples: the exact setup varies.
Linux terminal with Docker and the tools used in the workshop.
Linux terminal with Podman and the required supporting tools.
Linux terminal with kubectl, cluster access and a browser-based editor for YAML files.
Included in your training
The setup and duration of access depend on the specific workshop.
There is currently no standalone subscription and no publicly accessible browser lab.
The DevNinjas Dojo is our browser-based learning and practice environment for technical workshops. Dojo is included at no extra charge in all live workshops and corporate training. Trainers teach the subject matter. Participants then work on a task in the prepared environment, can use hints and afterwards review the solution. The same process is being developed further for e-learning with videos and chapters. The start date and packages have not yet been set.
CURRENT
Workshop lab in the DevNinjas Dojo
Included in all workshops and corporate training.
IN DEVELOPMENT
Self-paced learning and e-learning
The start date and specific packages have not yet been set.
DevNinjas Dojo · Exercise preview
FUTURE PREVIEW
Select an example to switch the preview.
The previews are illustrations you cannot interact with yet; the interactive exercise is in development.
TASK 2 OF 4
SIMULATED
SIMULATED KUBERNETES TASK
Why does the payments-api container keep restarting?
Review the kubectl output and select the cause it clearly establishes.
dojo@k8s-lab:~$ kubectl get pods -n dojo
NAME READY STATUS RESTARTS AGE
payments-api-6f84d9c7b9-kp7xv 0/1 CrashLoopBackOff 4 (42s ago) 5m17s
dojo@k8s-lab:~$ kubectl describe pod payments-api-6f84d9c7b9-kp7xv -n dojo
Name: payments-api-6f84d9c7b9-kp7xv
Namespace: dojo
Node: worker-2/10.10.0.12
Start Time: Thu, 13 Aug 2026 09:42:11 +0200
Containers:
payments-api:
Image: ghcr.io/devninjas/payments-api:1.4.0
State: Waiting
Reason: CrashLoopBackOff
Last State: Terminated
Reason: Error
Exit Code: 137
Ready: False
Restart Count: 4
Liveness: http-get http://:8080/healthz delay=5s timeout=1s period=10s
#success=1 #failure=3
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Warning Unhealthy 42s (x15 over 5m12s) kubelet Liveness probe failed:
HTTP probe failed with statuscode: 500
Normal Killing 42s (x5 over 4m52s) kubelet Container payments-api failed
liveness probe, will be restartedTASK 1 OF 3
SIMULATED
SIMULATED KUSTOMIZE TASK
Where do you set the replica count for payments-api to three for production only?
Review the production overlay and select the appropriate change.
overlays/prod/deployment-patch.yaml apiVersion: apps/v1 kind: Deployment metadata: name: payments-api spec: replicas: 1 overlays/prod/kustomization.yaml apiVersion: kustomize.config.k8s.io/v1beta1 kind: Kustomization resources: - ../../base patches: - path: deployment-patch.yaml
TASK 1 OF 2
SIMULATED
SIMULATED LINUX TASK
Which Linux distribution is running on the lab system shown?
Review the entries in /etc/os-release and select the matching distribution.
dojo@linux-lab:~$ cat /etc/os-release PRETTY_NAME="Ubuntu 24.04.1 LTS" NAME="Ubuntu" VERSION_ID="24.04" VERSION="24.04.1 LTS (Noble Numbat)" VERSION_CODENAME=noble ID=ubuntu ID_LIKE=debian HOME_URL="https://www.ubuntu.com/" SUPPORT_URL="https://help.ubuntu.com/" BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/" PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy" UBUNTU_CODENAME=noble LOGO=ubuntu-logo
Dojo is included at no extra charge in all live workshops and corporate training. Trainers first teach the subject matter. You then work on a task in the Dojo training environment, use hints as needed and afterwards review the solution together. In the future, e-learning will use the same process with videos and chapters. This format is in development; the start date and packages have not yet been set.
A SHARED LEARNING APPROACH
Today, the trainer teaches the topic live. In e-learning, a video per chapter will provide the introduction.
Live: trainer · E-learning: video
You work through the relevant exercise in the prepared training environment and can view hints as needed.
Same task format in both models
In the workshop, the trainer discusses the approach to the solution and any questions. In e-learning, a guided solution walkthrough will follow.
Live: together · E-learning: guided
Dojo is included at no extra charge in all live workshops and corporate training. The environment is available during agreed training times for tasks in your booked course. Additional access windows, resource limits and reset rules apply only if stated in the proposal or booking confirmation. Dojo is a training environment, not a production environment.
ACCESS TERMS
The proposal and booking confirmation set the terms
The environment is available during the agreed training times. Additional access windows apply only if expressly agreed.
No general 24/7 availability
Access windows, resource limits and reset rules are recorded in the proposal or booking confirmation.
Clearly agreed before training
A modern browser and internet access are all you need for the Dojo exercises. No local installation is required.
Prepared for the agreed exercises
Use Dojo for the tasks and exercise data for your agreed training.
Unless expressly agreed otherwise, the following information stays outside the training environment:
DevNinjas Dojo is currently the browser-based learning environment for our live workshops. In parallel, we are developing it into a standalone e-learning platform: learning videos on DevOps and Kubernetes will take learners directly into matching Practice Labs in the browser. Hints provide support when needed; a guided walkthrough explains the steps to the solution. The platform is not yet publicly available. The launch date, specific courses and packages remain open.
DOJO E-LEARNING · PRODUCT VISION
IN DEVELOPMENT
CONCEPT VIEW
SAMPLE CHAPTER · DEVOPS & KUBERNETES
A clear introduction to the chapter
An instructor introduces the topic. Learners then move directly to the matching hands-on exercise.
02 · PRACTICE LAB
TASK · ANALYZE A POD ERROR
Find out why the API pod is not starting.
learner@dojo:~$ kubectl get pods NAME READY STATUS RESTARTS AGE web-5d8f7c6b9-m4tzn 1/1 Running 0 12m api-7c9d8b5f4-x2kq7 0/1 CrashLoopBackOff 4 (42s ago) 5m17s
ENVIRONMENTSTerminal · Code editor · Desktop when needed
EXAMPLE · CONCEPT VIEW
Check the Events section in the pod description. It provides clues about the repeated restarts.
kubectl describe pod api-7c9d8b5f4-x2kq7EXAMPLE · CONCEPT VIEW
kubectl describe pod api-7c9d8b5f4-x2kq7The events show failing liveness probes returning HTTP 500, followed by container restarts.kubectl logs api-7c9d8b5f4-x2kq7 --previousThe previous container instance's logs report the missing DATABASE_URL environment variable.kubectl get pods -wAdd DATABASE_URL to Deployment api and verify that the replacement pod reaches 1/1 Running.Dojo e-learning is currently in development. We will announce the launch and packages once they are confirmed.
View planned access modelsThe browser-based learning environment is already included when you book training with us. We are developing Dojo Learn, Dojo Practice and Dojo Business for independent learning. The launch date, prices and final scope have not yet been set.
ACCESS MODELS · WORKING DRAFT
INCLUDED IN TRAINING TODAY
Every DevNinjas training booking automatically includes the appropriate browser-based learning environment for the workshop. A terminal, code editor, required tools and, when needed, a desktop environment are ready to use.
No separate plan
Choose the right training course. We provide a learning environment set up for it.
View all workshopsAll models are in development. The cards show the currently recommended product structure; they do not yet represent an offer you can book.
PRICES & LAUNCH DATE NOT YET SET
IN DEVELOPMENT
Follow a structured path through a specific topic and apply what you learn directly in the browser.
AI Sensei
OPTIONAL ADD-ON
AI learning support for explanations and next steps. Pricing, scope and usage limits are being worked out.
Not available · Waitlist open
Non-binding · Price and launch date not yet set
IN DEVELOPMENT
RECOMMENDED
The complete learning journey for intensive practice and independent problem-solving.
AI Sensei
OPTIONAL ADD-ON
AI hints for tasks and ways to solve them. Pricing and usage allowances are being worked out.
Not available · Waitlist open
Non-binding · Price and launch date not yet set
IN DEVELOPMENT
Manage team learning access, goals and progress in one place.
AI Sensei
OPTIONAL ADD-ON
An add-on for teams, per person or with a usage allowance. The model and pricing are being worked out.
Business Insights
Keep track of learning goals, progress and access.
Not available · Waitlist open
Non-binding · Price and launch date not yet set
DOJO BUSINESS · IN DEVELOPMENT
Dojo Business is intended to build on Dojo Practice, enabling companies to manage access, assign learning content and goals, and keep track of their teams' development. The launch date and exact packages have not yet been set.
Business Insights
The planned view is intended to show which learning goals have been assigned and how teams are developing. Reporting detail, visibility and data protection are currently being worked out.
The overview shows the recommended package structure. Feature allocations that are still open remain explicitly marked as work in progress.
NOT A BINDING OFFER
| Feature | Dojo Learn | Dojo Practice | Dojo Business |
|---|---|---|---|
| Recommended use | Achieve a specific learning goal | Keep practicing and deepen knowledge | Develop teams through structured learning |
| Learning path access | One active learning path | All published learning paths | Dojo Practice plus team access |
| Learning videos and course chapters | Intended for the active learning path | Intended: all videos and chapters | Per assigned team seat |
| Hands-on labs in the browser | For the active learning path | For all learning paths | Per assigned team seat |
| Practice projects and challenges | Intended: basic practice tasks | Intended: in-depth practice projects | Planned: team assignments |
| Free-form practice in Playground | Not intended | Intended: free-form practice | Use under organization rules |
| Saveable learning environments | Storage capacity being worked out | Intended: multiple environments | Storage rules being worked out |
| Learning progress tracking | Intended: personal tracking | Intended: tracking with Skill Checks | Planned: tracking with team overview |
| Team management and learning reports | Not intended | Not intended | Team features being worked out |
| AI Sensei: AI learning assistant | Optional paid add-on | Optional paid add-on | Optional paid add-on |
Recommended use
Learning path access
Learning videos and course chapters
Hands-on labs in the browser
Practice projects and challenges
Free-form practice in Playground
Saveable learning environments
Learning progress tracking
Team management and learning reports
AI Sensei: AI learning assistant
Verifiable skills credentials, exams and Open Badges are being worked out separately from the access models. No binding decision has yet been made on their inclusion in any package.
PLANNED FOR LATER
Find answers about costs and standalone access, installation and corporate networks, your own exercise resources, access periods, exercises, data, NDAs and DPAs. We also cover Dojo for teams, planned e-learning and AI Sensei.
DevNinjas Dojo is included at no separate charge in every public DevNinjas workshop and corporate training course, but cannot be booked separately. There is currently no standalone subscription or public browser lab. Standalone e-learning is in development.
Find courses in the workshop catalogue. You can register your interest via the waitlist without commitment.
Yes: DevNinjas Dojo runs in your browser without local installation; restricted corporate networks may need VPN, proxy or firewall approvals. You need a modern browser and internet access. Access uses SSH, HTTPS and web terminals, without a proprietary client.
For corporate training, we check access 1-2 weeks beforehand. If access fails, we find a solution with your IT: approvals, another network or device. For public workshops, ask your IT to approve Zoom and Dojo beforehand.
In Dojo, you use your own exercise resources; the OpenShift course is an exception, with a shared cluster. Depending on the topic, you work with Kubernetes clusters, VMs or containers, a full Linux terminal, a browser code editor and a desktop when needed. Tools are preinstalled; you can install more.
For IaC courses, we provide cloud resources at no extra cost; you do not need your own AWS account. The OpenShift course requires no Red Hat account.
Dojo is available during the agreed training times of your booked course. Without a separate agreement, access ends with the course and does not continue between separate workshops; there is no general 24/7 availability.
Additional access windows, resource limits and reset rules apply only if stated in the proposal or booking confirmation.
In Dojo, you work on a task in the prepared environment after the trainer explains the topic live. You can reveal hints when needed. Afterwards, you review the solution together and ask the trainer questions live. These exercises are part of the live workshop.
Dojo exercises use prepared or anonymised sample data; access to production systems is unnecessary. Unless expressly agreed, do not use confidential production data, production credentials or secrets, or special categories of personal data in the training environment.
For corporate training, we can prepare or anonymise your examples. Your materials stay internal and are not reused. DevNinjas provides a non-disclosure agreement (NDA) and a data processing agreement (DPA) on request.
Your team can use Dojo today through corporate training, with an environment planned around your topic and learning goals. We agree tools, access period, exercise flow and group size with you, and check technical requirements beforehand.
Dojo Business is not yet available; planned features cover licences, roles, assigned learning goals and team progress rather than employee rankings. Companies can register their interest via the waitlist without commitment.
Standalone e-learning for DevNinjas Dojo is in development, not publicly available. Planned models are Dojo Learn, Dojo Practice and Dojo Business; videos lead to browser Practice Labs with hints and guided walkthroughs.
AI Sensei is a planned optional paid add-on for explanations and hints; pricing, scope and usage limits are being worked out. Workshops already include an Open Badge; e-learning exams, verifiable credentials and Open Badges are planned separately for later. Names, scope, prices and launch date may change. You can register your interest via the waitlist without commitment.
Available today with your training
E-learning in development
The start date and packages are still undecided.