metalLB

https://metallb.universe.tf/

Install MetalLB using manifest

kubectl apply -f https://raw.githubusercontent.com/metallb/metallb/v0.13.10/config/manifests/metallb-native.yaml

Create a custom manifest with the IP pool

#Filename metalLB-IPAddressPool.yaml

apiVersion: metallb.io/v1beta1
kind: IPAddressPool
metadata:
  name: ip-pool
  namespace: metallb-system
spec:
  addresses:
  - 192.168.1.170-192.168.1.179

Apply manifest to cluster

kubectl apply -f metalLB-IPAdressPool.yaml

Testing the MetalLB loadbalancer

kubectl create deployment nginx1 --image=nginx
kubectl expose deployment/nginx1 --type="LoadBalancer" --port 80

Check the nginx service to see what IP was assigned kubectl get service

Should output something like:

kubernetes   ClusterIP      10.233.0.1      <none>          443/TCP        38m
nginx1       LoadBalancer   10.233.36.193   192.168.1.170   80:30490/TCP   40s

IP assigned to that service is 192.168.1.170 and port 80 is exposed externally for that IP. Test with browser with http://192.168.1.170/

---

Manually assign a static IP

The following manifest is will create a deployment and use a static IP

apiVersion: apps/v1
kind: Deployment
metadata:
  annotations:
    deployment.kubernetes.io/revision: "1"
  labels:
    app: nginx
  name: nginx
  namespace: default
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - image: nginx
        imagePullPolicy: Always
        name: nginx
---

apiVersion: v1
kind: Service
metadata:
  annotations:
    metallb.universe.tf/loadBalancerIPs: 192.168.1.170
  labels:
    app: nginx
  name: nginx
  namespace: default
spec:
  ports:
  - nodePort: 32551
    port: 80
    protocol: TCP
    targetPort: 80
  selector:
    app: nginx
  sessionAffinity: None
  type: LoadBalancer