crdb-kubernetes

A very simple app that demonstrates the ease of scaling and upgrading a CockroachDB cluster in Kubernetes

Setup

NodePort

Initialise Kubernetes:

k3d cluster create demo \
    -p "26257:30080@agent:0" \
    -p "8080:30081@agent:0" \
    --agents 2

Apply CockroachDB stateful set:

kubectl apply -f manifests/statefulset.yaml
kubectl apply -f manifests/init.yaml

see -n 1 kubectl get pods

kubectl apply -f manifests/ingress.yaml

LoadBalancer

Initialise Kubernetes:

k3d cluster create demo \
    -p "26257:80@loadbalancer"

Apply CockroachDB stateful set:

kubectl apply -f manifests/statefulset.yaml
kubectl apply -f manifests/init.yaml

see -n 1 kubectl get pods

Demo basics

Connect to the Console

Connect to CockroachDB

cockroach sql --url "postgres://root@localhost:26257/defaultdb?sslmode=disable"

Demo various operations

Kick-off a Go app

go run apps/ping.go

• Upgrade the cluster to v22.2.8
• Scale up to 5 nodes

Kill everything

kubectl delete all --all -n default
kubectl delete pvc datadir-cockroachdb-0 datadir-cockroachdb-1 datadir-cockroachdb-2 datadir-cockroachdb-3 datadir-cockroachdb-4