datastaxdevs/workshop-k8ssandra

Learn how to deploy and manage a data tier based on Apache Cassandra™ cluster in Kubernetes using K8ssandra.

K8ssandra Workshop

In this repository, you'll find everything for the Cassandra Kubernetes Workshop delivered by DataStax Developers!

How to do the workshop and learn the new skills? Very easy, just three steps!

1. Watch the workshop on youtube
2. Do the practice steps
3. Ask you questions (chat or forum)

Done! That's it, you are amazing!

Table of content

• Workshop on YouTube
• Presentation
• Discord chat
• Q&A: community.datastax.com

Workshop Practice

Instructions has been moved to the wiki to ease the progression.

Resources and next steps

• For further learning from our team, please checkout datastax.com/dev where we keep many resources and hands on labs to help you improve your skill set.
• If you are looking to get certified on Cassandra, please visit datastax.com/dev/certifications.
• To get involved in the discussion around this project and others, please check out community.datastax.com.
• To learn more about K8ssandra, please checkout our website at k8ssandra.io and our project github at github.com.
• Liked the workshop? Subscribe to the next one at datastax.com/workshops!

workshop-k8ssandra's Issues

Wiki: Local Setup fails when creating the cluster

Local Setup: https://github.com/datastaxdevs/workshop-k8ssandra/wiki/Local-Setup

With current versions of kind, helm and kubectl installed
kind create cluster --config ./kind.yaml --image kindest/node:v1.18.2
fails with

[kubelet-check] It seems like the kubelet isn't running or healthy.
[kubelet-check] The HTTP call equal to 'curl -sSL http://localhost:10248/healthz' failed with error: Get http://localhost:10248/healthz: dial tcp 127.0.0.1:10248: connect: connection refused.

Unfortunately, an error has occurred:
timed out waiting for the condition

This error is likely caused by:
- The kubelet is not running
- The kubelet is unhealthy due to a misconfiguration of the node in some way (required cgroups disabled)

If you are on a systemd-powered system, you can try to troubleshoot the error with the following commands:
- 'systemctl status kubelet'
- 'journalctl -xeu kubelet'

Additionally, a control plane component may have crashed or exited when started by the container runtime.
To troubleshoot, list all containers using your preferred container runtimes CLI.

Here is one example how you may list all Kubernetes containers running in cri-o/containerd using crictl:
- 'crictl --runtime-endpoint unix:///run/containerd/containerd.sock ps -a | grep kube | grep -v pause'
Once you have found the failing container, you can inspect its logs with:
- 'crictl --runtime-endpoint unix:///run/containerd/containerd.sock logs CONTAINERID'

couldn't initialize a Kubernetes cluster

Just running
kind create cluster --config ./kind.yaml
seems to fix the issue (at least for this step)

[HW] Michel de Ru

Name: Michel de Ru
[email protected]
Linkedin Profile: https://www.linkedin.com/in/mderu/

Attach the homework screenshots below:

[HW] Ankit Bhavsar

Name: Ankit Bhavsar
Linkedin Profile: https://www.linkedin.com/in/ankit-bhavsar/

Attach the homework screenshots below:

I created the set up on my local machine.

Step 1 Setting Up Cassandra

Step 2 Monitoring Cassandra

Prometheus

Grafana

Step 3 Working with Data

Petclinic

Add

Delete

Step 4 Scaling Up and Down

Step 5 Stargate

Step 6 Running Repairs

Thank you once again :)

[HW] slachiewicz

Name: Sylwester Lachiewicz
Linkedin Profile: https://www.linkedin.com/in/slachiewicz/

Attach the homework screenshots below:

Too fast - scale to 3 instead of 2 on local laptop ;-)

[HW] Balakumar Natarajan

Name: Balakumar Natarajan
Linkedin Profile: https://linkedin.com/in/balakumar-natarajan-51b24422

Attach the homework screenshots below:

Type Reason Age From Message

---

Normal CreatedResource 4m55s cass-operator Created service k8ssandra-dc1-service
Normal CreatedResource 4m55s cass-operator Created service k8ssandra-seed-service
Normal CreatedResource 4m55s cass-operator Created service k8ssandra-dc1-all-pods-service
Normal CreatedResource 4m49s cass-operator Created statefulset k8ssandra-dc1-default-sts
Normal ScalingUpRack 4m49s (x2 over 4m49s) cass-operator Scaling up rack default

upgraded to 1.3.0

[HW] dsfgfsdg

Name:
Linkedin Profile:

Attach the homework screenshots below:

[HW] Joel Reis

Name: Joel Reis
Linkedin Profile: http//linkedin.com/in/joelvreis

Attach the homework screenshots below:

---

[HW] Jasbir Singh

Name: Jasbir Singh
Linkedin Profile: www.linkedin.com/in/jasbir84

Attach the homework screenshots below:

Removing the work from this issue. created new one to upload my new work.

[HW] Włodzimierz Kozłowski

Name: Włodzimierz Kozłowski
Linkedin Profile: https://www.linkedin.com/in/wlodzimierz-kozlowski/

Attach the homework screenshots below:

I try to create and run on AWS EKS cluster

But I have some issues with storage…

Then I copy default „gp2” StorageClass to „standard”

And then pods status is ready

I try to run on docker-desktop local „cluster”

change NodePort to LoadBalancer

And „standard” to „hostpath” = my StorageClass in Docker environment

WSL2 time issue when hibernate laptop

And eventually restart Docker for accurate data 😉

[HW] Steven Matison

Name: Steven Matison
Linkedin Profile: https://www.linkedin.com/in/steven-matison/
** Email:** [email protected]

Attach the homework screenshots below:

[HW] Aleks

Name: Aleks
Linkedin Profile: Aleks

Attach the homework screenshots below:

[HW] Probu

Name: Paul Robu
Linkedin Profile: http://linkedin.com/in/paulrobu

Attach the homework screenshots below:

Scaling Up & Monitoring:

Stargate:

Reaper:
For some reason http://repair.YOURADDRESS:8080/webui/ always redirects me to http://repair.YOURADDRESS:8080/petclinic/webui/ which is invalid URL.

The deployment looks good to me

and also in Traefik


so I'm not sure where from comes the redirect.

[HW] Lokkeshwaran Jayabalan

Name: Lokkeshwaran J
Linkedin Profile: https://www.linkedin.com/in/lokkeshwaran/

Attach the homework screenshots below:

[HW] Sumeet Dhingra

Name: Sumeet Dhingra
Linkedin Profile: https://www.linkedin.com/in/sumeetdhingra/

Attach the homework screenshots below:

[HW] Jasbir Singh

Name: Jasbir Singh
Linkedin Profile: https://linkedin.com/in/jasbir84

Attach the homework screenshots below:

Homework using local kind cluster on mac:

[HW] Francesco Abbate

Name: Francesco Abbate
Linkedin Profile: https://www.linkedin.com/in/frabbate/

Attach the homework screenshots below:

installed k8ssandra

Petclinic running

Added owner

[HW] Carlos Carrillo Agoyo

Name: Carlos Carrillo Agoyo
Linkedin Profile: https://www.linkedin.com/in/carlos-carrillo-agoyo-a3b7a0129/

Attach the homework screenshots below:

Really good workshop. Thank you!

Error - Validation error

I tried to run helm chart for k8ssandra - issues already exist with k8ssandra version upgrade to 1.3.0

root@devops:/home/bala_stronger/workshop-k8ssandra# helm install -f k8ssandra.yaml k8ssandra k8ssandra/k8ssandra

Error:

unable to build kubernetes objects from release manifest: error validating "": error validating data: ValidationError(IngressRouteTCP.spec.routes[0].services[0]): unknown field "kind" in us.containo.traefik.v1alpha1.IngressRouteTCP.spec.routes.services

[HW] Sharath Koushik

Name: Sharath Koushik
Linkedin Profile: www.linkedin.com/in/sharathkoushik

Attach the homework screenshots below:

k8ssandra_homework.docx

[HW] Avinash Upadhyaya

Name: Avinash Upadhyaya K R
Linkedin Profile: https://www.linkedin.com/in/avinash-upadhyaya/

Attach the homework screenshots below:

[HW] Vladislav Boldyrev

Name: Vladislav Boldyrev
Linkedin Profile: www.linkedin.com/in/-vb

Hello,
It is simply impossible to do a task with Reaper locally under Windows, something is broken (all other tasks are done).

Attach the homework screenshots below:

[HW] K8ssandra By Joshua B. Turner

Name: Joshua B. Turner
Email: [email protected]
LinkedIn: https://www.linkedin.com/in/taztech/

I did the labs twice and encountered many challenges using many workarounds like Postman instead of Curl, the "kubectl pods -w" command instead of the "watch kubectl get pods" command, and using the site "https://www.base64decode.org/" instead of doing this decoding inline, etc. This workshop is very difficult to complete locally from a Windows workstation where I performed the work. Had I known and if I were to attempt a third time, I'd probably do so and suggest for others to try from a Linux virtual machine. I have included various screens and configuration encountered throughout the workshop. Please provide direction on how to get Stargate and Repair running on a Windows workstation or approve the badge for the effort put in thus far. I did learn a lot from this workshop and am taking incremental steps in gaining expertise in the topics covered. It'll sink in after the inevitable repeat exposure.

Attach the homework screenshots below:

[HW] Tom Rota

Name: Tom Rota
Linkedin Profile: https://www.linkedin.com/in/trota

Attach the homework screenshots below:

Installation...
I installed the workshop on my laptop.

Monitoring...

Data...

Scaling...

Stargate...

Reaper...
The reaper ui redireced to http://repair.localhost:8080/petclinic/webui, so I logged in to the container k8ssandra-reaper-867fcd557d-9vrhh and used the executable to schedule and then manually run a repair. Hope that is ok.

Thanks for running the workshop and creating all this content. It was fun and educational :)