PureLB
PureLB is a Service Load Balancer Controller for Kubernetes.
Instal PureLB using helm charts:
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| helm repo add purelb https://gitlab.com/api/v4/projects/20400619/packages/helm/stable
helm repo update
helm fetch purelb/purelb --untar
helm install --create-namespace --namespace=purelb purelb purelb/purelb -f values.yaml
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Create IPv4 Service Group:
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| cat <<EOF | kubectl apply -f -
apiVersion: purelb.io/v1
kind: ServiceGroup
metadata:
name: ipv4-routed
namespace: purelb
spec:
local:
aggregation: /32
pool: 192.168.121.85-192.168.121.95
subnet: 192.168.121.1/24
EOF
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Calico IPv4 Pool:
Layer 2 mode is the simplest to configure: in many cases, you don’t need any protocol-specific configuration, only IP addresses.
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| cat <<EOF | kubectl create -f -
apiVersion: crd.projectcalico.org/v1
kind: IPPool
metadata:
name: purelb-ipv4
spec:
cidr: 192.168.121.1/24
disabled: true
EOF
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Check if all the resources are deployed in purelb namespace:
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| kubectl get all -n purelb
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PureLB Annotations:
PureLB uses annotations to configure functionality not native in the k8s API.
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| apiVersion: v1
items:
- apiVersion: v1
kind: Service
metadata:
annotations:
purelb.io/service-group: ipv4-routed #service group name
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OpenELB
OpenELB is an open-source load balancer implementation designed for bare-metal Kubernetes clusters.
Instal OpenELB using helm charts:
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| helm repo add kubesphere-stable https://charts.kubesphere.io/stable
helm repo update
helm fetch kubesphere-stable/openelb --untar
helm install openelb kubesphere-stable/openelb -n openelb-system --create-namespace -f values.yaml
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| cat <<EOF | kubectl create -f -
apiVersion: network.kubesphere.io/v1alpha2
kind: Eip
metadata:
name: eip-dev-pool
annotations:
eip.openelb.kubesphere.io/is-default-eip: "true"
spec:
address: 192.168.121.85-192.168.121.95
protocol: layer2
interface: eth0
disable: false
status:
occupied: false
usage: 1
poolSize: 10
used:
"192.168.121.91": "default/test-svc"
firstIP: 192.168.121.85
lastIP: 192.168.121.95
ready: true
v4: true
EOF
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Test if OpenELB is assiging the ips:
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| kubectl run webapp --image=nginx
kubectl expose pod webapp --port=80 --type=LoadBalancer
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Reference Links:
