====== Installation du controlleur haproxy en ingress ======

Ajout du dépôt helm:

<code>
helm repo add haproxytech https://haproxytech.github.io/helm-charts

</code>

Mise à jour des métadonnées des dépôts helm :

<code>
helm repo update

</code>

Déploiement :

<code>
helm install kubernetes-ingress haproxytech/kubernetes-ingress

</code>

Vérification des pods haproxy controller :

<code>
kubectl get pods -A

</code>

Récupération du port d'écoute :

<code>
kubectl get svc

</code>

Ce qui doit ressembler à :

<code>
kubernetes-ingress                   NodePort       10.108.250.33    <none>        80:32650/TCP,443:31943/TCP,1024:32649/TCP   63m

</code>

Le port d'écoute ici est 32650 pour le HTTP, et 31943 pour le HTTPS.

Pour validation :

<code>
$ curl localhost:32650
default backend - 404

</code>

Pour acceder depuis l'exterieur, mieux vaut avoir une paire de haproxy (ou autres) devant le cluster k8s. Voici un exemple de configuration :

<file>
#---------------------------------------------------------------------
# Example configuration for a possible web application.  See the
# full configuration options online.
#
#   http://haproxy.1wt.eu/download/1.4/doc/configuration.txt
#
#---------------------------------------------------------------------

#---------------------------------------------------------------------
# Global settings
#---------------------------------------------------------------------
global
    # to have these messages end up in /var/log/haproxy.log you will
    # need to:
    #
    # 1) configure syslog to accept network log events.  This is done
    #    by adding the '-r' option to the SYSLOGD_OPTIONS in
    #    /etc/sysconfig/syslog
    #
    # 2) configure local2 events to go to the /var/log/haproxy.log
    #   file. A line like the following can be added to
    #   /etc/sysconfig/syslog
    #
    #    local2.*                       /var/log/haproxy.log
    #
    log         127.0.0.1 local2

    chroot      /var/lib/haproxy
    pidfile     /var/run/haproxy.pid
    maxconn     4000
    user        haproxy
    group       haproxy
    daemon

    # turn on stats unix socket
    stats socket /var/lib/haproxy/stats

#---------------------------------------------------------------------
# common defaults that all the 'listen' and 'backend' sections will
# use if not designated in their block
#---------------------------------------------------------------------
defaults
    mode                    http
    log                     global
    option                  httplog
    option                  dontlognull
    option http-server-close
    option forwardfor       except 127.0.0.0/8
    option                  redispatch
    retries                 3
    timeout http-request    10s
    timeout queue           1m
    timeout connect         10s
    timeout client          1m
    timeout server          1m
    timeout http-keep-alive 10s
    timeout check           10s
    maxconn                 3000

#---------------------------------------------------------------------
# main frontend which proxys to the backends
#---------------------------------------------------------------------
frontend  main *:80
    default_backend            http-backend

frontend https-front
    bind *:443 transparent
    mode tcp
    default_backend            https-backend

#---------------------------------------------------------------------
# static backend for serving up images, stylesheets and such
#---------------------------------------------------------------------
backend static
    balance     roundrobin
    server      static 127.0.0.1:4331 check

#---------------------------------------------------------------------
# round robin balancing between the various backends
#---------------------------------------------------------------------
backend http-backend
    balance     roundrobin
    server  app1 mini01.lan:32650 check
    server  app2 mini02.lan:32650 check
    server  app3 mini03.lan:32650 check

backend https-backend
    mode tcp
    balance     roundrobin
    server  ssl-app1 mini01.lan:31943 check verify none
    server  ssl-app2 mini02.lan:31943 check verify none
    server  ssl-app3 mini03.lan:31943 check verify none

</file>