k8ssandra-docker

Install k8ssandra per k8ssandra.io

helm install -f k8ssandra.yaml k8ssandra k8ssandra/k8ssandra
watch kubectl get pods

User and pass needed for local testing

kubectl get secret k8ssandra-superuser -o jsonpath="{.data.username}" | base64 --decode ; echo
kubectl get secret k8ssandra-superuser -o jsonpath="{.data.password}" | base64 --decode ; echo

Port forwarding for local access

kubectl port-forward svc/k8ssandra-dc1-stargate-service 8080 8081 8082 9042

Use cqlsh to load demo.cql statements

kubectl exec -it k8ssandra-dc1-default-sts-0 -- bash -c "wget https://raw.githubusercontent.com/ds-steven-matison/k8ssandra-docker/master/demo.cql -P /tmp && /opt/cassandra/bin/cqlsh localhost 9042 -u k8ssandra-superuser -p [pass above] -f /tmp/demo.cql"

Role out app

kubectl apply -f deployment.k8s.yaml

Access app locally

kubectl port-forward deployments/k8ssandra-docker  1337:80

After port fwd access app @ http://localhost:1337.

Connect to app container

kubectl exec -it deployments/k8ssandra-docker /bin/bash

💡 Use the command tail -f /var/log/php5-fpm.log to check PHP Errors. You can also find the app source at /usr/share/nginx/html.

Create your own dockerhub image

Current Docker image.

1. Git clone [this repo]
2. Next build and push image

docker build . -t dsstevenmatison/k8ssandra-docker
docker push dsstevenmatison/k8ssandra-docker

⚠️ This sample above is mine, you would change to your dockerhubrepo/appname. Then in the deployment.k8s.yaml file you reference the full docker.io string to image. For example: docker.io/dsstevenmatison/k8ssandra-docker:latest.

3. Edit deployment.k8s.yaml accordingly then

kubectl apply -f deployment.k8s.yaml

4. If you are just updating the image, murder the pod and it will recreate w/ new image

kubectl delete pod k8ssandra-docker-6fd6b955f6-6ldk5

💡 Monitor your watch kubectl get pods terminal and watch this pod terminate and recreate!!!

Cluster should look like

NAME                                                READY   STATUS    RESTARTS   AGE
k8ssandra-kube-prometheus-operator-85695ffb-f42fv   1/1     Running   0          25m
k8ssandra-reaper-operator-b67dc8cdf-j5hnw           1/1     Running   0          25m
prometheus-k8ssandra-kube-prometheus-prometheus-0   2/2     Running   1          24m
k8ssandra-cass-operator-7c876d6d96-4pdjr            1/1     Running   0          25m
k8ssandra-grafana-5c6d5b8f5f-fj9r4                  2/2     Running   0          25m
k8ssandra-dc1-default-sts-0                         2/2     Running   0          24m
k8ssandra-reaper-655fc7dfc6-dct2n                   1/1     Running   0          20m
k8ssandra-dc1-stargate-77d4985d67-gfjwq             1/1     Running   0          25m
k8ssandra-docker-576fbdbd97-4kl2x                   1/1     Running   0          3m43s