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Balanceador Haproxy

Compose   |    Comandos

Balanceador

Compose

  • Criação de um docker-compose para subir um balanceador haproxy

    version: "3.6"
services:
    haproxy:
        image: haproxy
        env_file:
            - ./haproxy/haproxy.env
        volumes:
            - ./haproxy/haproxy.cfg:/usr/local/etc/haproxy/haproxy.cfg:ro
            - ./haproxy/abuse.lst:/usr/local/etc/haproxy/abuse.lst:ro
        ports:
            - "80:80"
            - "81:81"
            - "441:441"
            - "6443:6443"
            - "443:443"
            - "8081:8081"

  • Aruivo de variáveis utilizadas

    • haproxy.env
    #Global
LOGGER=10.0.2.206

#Listen Stats
LISTEN=*
STATS=enable
STATSLP=admin:admin
STATSURI=/stats
STATSSHOW=Praticando Haproxy
ABUSERS=/etc/haproxy/abuse.lst

#Defaults
TIMEOUT=50s

#Listen Kubernetes-apiserver-https
SERVER=192.168.50
PORT_K8S=6443
PORT_INGRESS_ISTIO=31987

  • Criar arquivo de configuração haproxy

  • Ativar dashboardo haproxy

  • Adicionar o Cluster Kubernetes no haproxy

  • Adicionar serviço nginx ao haproxy

    • haproxy.cfg
    global
# log "${LOGGER}:514" local0
    log /dev/log  local0
    log /dev/log  local1 notice
    user haproxy
    group haproxy
    daemon

defaults
    log    global
    mode http
    timeout client "${TIMEOUT}"
    timeout server "${TIMEOUT}"
    timeout connect 5s

listen stats
    bind "${LISTEN}:81"
    stats "${STATS}"
    # http-request rejeitar if { src -f "${ABUSERS}" }
    stats hide-version
    stats refresh 30s
    stats show-node
    stats auth "${STATSLP}"
    stats uri "${STATSURI}"
    stats show-desc "${STATSSHOW}"

listen kubernetes-apiserver-https
    bind "${LISTEN}:6443"
    mode tcp
    option log-health-checks
    timeout client 3h
    timeout server 3h
    balance roundrobin
    server K8S_M01 "${SERVER}.11:${PORT_K8S}" check check-ssl verify none inter 2000

frontend service-nginx
    mode http
    option log-health-checks
    bind "${LISTEN}:80"

    acl dns_nginx hdr(host) -i lab.k8s.io

    # config app teste weight
    acl path_nginx path_beg -i /
    use_backend nginx_weight if dns_nginx path_nginx

    # config app teste consistenthash
    acl path_nginx_hash path_beg -i /hash
    use_backend nginx_consistenthash if dns_nginx path_nginx_hash

    # config app teste loadbalancer
    acl path_nginx_lb path_beg -i /lb
    use_backend nginx_loadbalancer if dns_nginx path_nginx_lb

    # config app teste fault-injection
    acl path_nginx_injection path_beg -i /injection
    use_backend nginx_injection if dns_nginx path_nginx_injection

backend nginx_weight
    mode http
    option forwardfor
    balance leastconn
    server RR_K8S "${SERVER}.11:${PORT_INGRESS_ISTIO}" check 

backend nginx_consistenthash
    mode http
    option forwardfor
    balance leastconn
    server RR_K8S "${SERVER}.11:${PORT_INGRESS_ISTIO}" check 

backend nginx_loadbalancer
    mode http
    option forwardfor
    balance leastconn
    server RR_K8S "${SERVER}.11:${PORT_INGRESS_ISTIO}" check 

backend nginx_injection
    mode http
    option forwardfor
    balance leastconn
    server RR_K8S "${SERVER}.11:${PORT_INGRESS_ISTIO}" check

Comandos

  • Subindo o balanceador
docker-compose up -d
  • Derrubando o balanceador
docker-compose down
  • Restartando o balanceador
docker-compose restart
  • Haproxy Dashboard

Dashboard