Namespace Inventory

Every workload on the cluster lives in a namespace. This is the complete inventory of namespaces and what they contain.

System namespaces

kube-system

Core Kubernetes components installed by K3s.

Pod	Purpose
traefik	Ingress controller — routes HTTP traffic
coredns	Cluster-internal DNS
metrics-server	Collects CPU/memory usage data
local-path-provisioner	Creates PersistentVolumes on local disk
svclb-traefik (one per node)	LoadBalancer emulation for Traefik

kubectl -n kube-system get pods

cert-manager

TLS certificate automation. Used by Rancher.

Pod	Purpose
cert-manager	Core certificate controller
cert-manager-webhook	Validates certificate resources
cert-manager-cainjector	Injects CA bundles

cattle-system

Rancher server and supporting components.

Pod	Purpose
rancher	Cluster management UI and API
rancher-webhook	Validates Rancher resources
system-upgrade-controller	Manages K3s upgrades

cattle-fleet-system

Fleet GitOps engine (deployed by Rancher).

Pod	Purpose
fleet-controller	Watches Git repos and reconciles state
gitjob	Clones repositories
helmops	Processes Helm-based deployments

cattle-fleet-local-system

Fleet agent for the local cluster.

Pod	Purpose
fleet-agent	Applies Fleet-managed resources to this cluster

cattle-capi-system

Cluster API controller (deployed by Rancher for multi-cluster management).

cattle-turtles-system

Rancher Turtles — CAPI integration layer.

Application namespaces

apps

Shared namespace for student applications deployed via NST Init.

Current workloads:

Deployment	Host
nst-init	init.nstsdc.org
whoami (demo)	whoami.nstsdc.org
ava-voice-detection-api	ava-voice-detection-api.nstsdc.org

notebooks

JupyterHub and user notebook servers.

overleaf

Self-hosted Overleaf with MongoDB and Redis.

Pod	Type
overleaf	Deployment
mongo-0	StatefulSet
redis-0	StatefulSet

minecraft

Minecraft Java server.

Pod	Type
minecraft-0	StatefulSet

exekute

Private container registry.

Pod	Purpose
registry	Docker registry (NodePort 30500)

fleet-default

Default Fleet namespace. Contains GitRepo resources and cleanup CronJobs.

Per-student namespaces

Students who deploy through kubectl (rather than NST Init) may have their own namespaces:

Namespace	Contents
khushthecoder	Snake game
yashsingh045	Portfolio, FoodKart, voice assistant
yashtesting	Portfolio (testing)

Listing namespaces

# All namespaces
kubectl get ns

# Pods in a specific namespace
kubectl -n <namespace> get pods

# Everything in a namespace
kubectl -n <namespace> get all

Creating a namespace

kubectl create namespace my-namespace

Deleting a namespace

This deletes the namespace and everything inside it:

kubectl delete namespace my-namespace

Use with caution — there is no undo.