Custom Resources with HAProxy Kubernetes Ingress Controller

blog20220610-01.sh

$ kubectl api-resources
NAME                     SHORTNAMES   APIVERSION   NAMESPACED   KIND
bindings                              v1           true         Binding
componentstatuses        cs           v1           false        ComponentStatus
configmaps               cm           v1           true         ConfigMap
endpoints                ep           v1           true         Endpoints
events                   ev           v1           true         Event
limitranges              limits       v1           true         LimitRange
namespaces               ns           v1           false        Namespace
nodes                    no           v1           false        Node
persistentvolumeclaims   pvc          v1           true         PersistentVolumeClaim

blog20220610-02.sh

$ kubectl apply -f https://cdn.haproxy.com/documentation/kubernetes/1.8/crd/backend.yaml
$ kubectl apply -f https://cdn.haproxy.com/documentation/kubernetes/1.8/crd/defaults.yaml
$ kubectl apply -f https://cdn.haproxy.com/documentation/kubernetes/1.8/crd/global.yaml

blog20220610-03.sh

$ kubectl api-resources
NAME       SHORTNAMES   APIVERSION                  NAMESPACED   KIND
...
backends                core.haproxy.org/v1alpha1   true         Backend
defaults                core.haproxy.org/v1alpha1   true         Defaults
globals                 core.haproxy.org/v1alpha1   true         Global

blog20220610-04.sh

$ kubectl get crd
NAME                        CREATED AT
backends.core.haproxy.org   2022-06-01T16:09:57Z
defaults.core.haproxy.org   2022-06-01T16:56:57Z
globals.core.haproxy.org    2022-06-01T16:56:57Z

blog20220610-05.yaml

apiVersion: "core.haproxy.org/v1alpha1"
kind: Global
metadata:
  name: example-global
  namespace: default
spec:
  config:
    maxconn: 60000

blog20220610-06.sh

$ kubectl apply -f example-global.yaml

blog20220610-07.sh

$ kubectl get globals
NAME             AGE
example-global   6d17h

$ kubectl describe global example-global
Name:         example-global
Namespace:    default
Labels:       <none>
Annotations:  <none>
API Version:  core.haproxy.org/v1alpha1
Kind:         Global
...

blog20220610-08.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: kubernetes-ingress
  namespace: haproxy-controller
data:
  cr-global: default/example-global

blog20220610-09.sh

$ kubectl apply -f  myconfigmap.yaml