direction: down

internet: "Internet"
eip: "EIP flottante 5.x.x.x\nhors Terraform, pilotée par l'agent OCF" { class: accent }
cluster: "Cluster Corosync/Pacemaker : quorum 3, élection" {
  a: "AZ-A : haproxy-a\n+ EIP egress permanente"
  b: "AZ-B : haproxy-b\n+ EIP egress permanente"
  c: "AZ-C : haproxy-c\n+ EIP egress permanente"
  note: "Corosync UDP 5404/5405 cross-Net, pcsd TCP 2224\nagent OCF custom, stratégie IMDS-first" { class: muted }
}
nginx: "3 frontends Nginx (chap. 4)\nsubnets privés, TLS de bout en bout"

internet -> eip { class: principal }
eip -> cluster: "LinkPublicIp dynamique" { class: principal }
cluster -> nginx: "HAProxy mode tcp passthrough" { class: principal }