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diff --git a/2025-04-03-stack/talk.tex b/2025-04-03-stack/talk.tex
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--- a/2025-04-03-stack/talk.tex
+++ b/2025-04-03-stack/talk.tex
@@ -148,101 +148,90 @@ Approche greenfield : on choisit et conçoit les services que l'on fournit
 
 \end{frame}
 
+\begin{frame}
+\frametitle{Infrastructure et logiciels actuels}
+
+{\Large Choix radicaux $\Longrightarrow$ infrastructure spécifique}
+
+\vfill
+
+{\large Qu'est-ce qui fonctionne actuellement ?}
+
+\end{frame}
+
+\begin{frame}
+\frametitle{Infrastructure et logiciels actuels}
+\begin{itemize}
+\item Des machines en nombre limité et peu puissantes
+\item Plusieurs zones géographiques
+\item Un orchestrateur distribué ``off the shelf'' (Nomad + Consul)
+\item Un logiciel de stockage objet distribué ``maison'' (Garage)
+\item Des boucles de rétroaction
+\item Des services majoritairement distribués
+\end{itemize}
+\end{frame}
+
+\begin{frame}[plain]
+\begin{center}
+\includegraphics[height=\textheight]{assets/deuxfleurs-nomad-20241022.png}
+\end{center}
+\end{frame}
+
+\begin{frame}
+\frametitle{Nomad}
+\begin{itemize}
+\item Orchestrateur développé par Hashicorp / IBM
+\item Définition déclarative des ``jobs'' avec contraintes
+\item Fonctions : ordonnancement et maintien en condition
+\item Control plane hautement disponible (clustering Raft)
+\end{itemize}
+\end{frame}
+
+\begin{frame}[fragile]
+\frametitle{Exemple de job Nomad (simplifié)}
+\begin{footnotesize}
+\begin{verbatim}
+job "jitsi" {
+  datacenters = ["neptune", "scorpio", "corrin"]
+  type = "service"
+  task "front" {
+    driver = "docker"
+    config { image = "superboum/amd64_jitsi_meet:v7"
+             volumes = ["secrets/certs/jitsi.key:/etc/nginx/jitsi.key"] }
+    template { data = "{{ key \"secrets/jitsi/jitsi.key\" }}"
+               destination = "secrets/certs/jitsi.key" }
+    resources { cpu = 300, memory = 200 }
+    service {
+      port = "https_port"
+      name = "https-jitsi"
+      check { type = "tcp"
+              port = "https_port"
+              interval = "60s"
+              timeout = "5s" }
+    }
+  }
+}
+\end{verbatim}
+\end{footnotesize}
+\end{frame}
+
+\begin{frame}
+\frametitle{Consul}
+\begin{itemize}
+\item \textbf{Outil de coordination distribuée} développé par Hashicorp
+\item Base de données clé-valeur distribuée (similaire à etcd)
+\item Stocke la configuration utile à Nomad + contenu arbitraire
+\item Service discovery (via intégration Nomad + API dédiée + DNS)
+\item Hautement disponible (clustering Raft)
+\end{itemize}
+\end{frame}
+
 \begin{frame}[plain]
 \begin{center}
 \includegraphics[height=\textheight]{infra_services_control_loop.png}
 \end{center}
 \end{frame}
 
-
-\begin{frame}
-	\frametitle{Who I am}
-	\begin{columns}[t]
-		\begin{column}{.2\textwidth}
-			\centering
-			\adjincludegraphics[width=.4\linewidth, valign=t]{assets/alex.jpg}
-		\end{column}
-		\begin{column}{.6\textwidth}
-			\textbf{Alex Auvolat}\\
-			PhD; co-founder of Deuxfleurs
-		\end{column}
-		\begin{column}{.2\textwidth}
-			~
-		\end{column}
-	\end{columns}
-	\vspace{2em}
-
-	\begin{columns}[t]
-		\begin{column}{.2\textwidth}
-			\centering
-			\adjincludegraphics[width=.5\linewidth, valign=t]{assets/logos/deuxfleurs.pdf}
-		\end{column}
-		\begin{column}{.6\textwidth}
-			\textbf{Deuxfleurs}\\
-			A non-profit self-hosting collective,\\
-			member of the CHATONS network
-		\end{column}
-		\begin{column}{.2\textwidth}
-			\centering
-			\adjincludegraphics[width=.7\linewidth, valign=t]{assets/logos/logo_chatons.png}
-		\end{column}
-	\end{columns}
-
-\end{frame}
-
-\begin{frame}
-	\frametitle{Our objective at Deuxfleurs}
-	
-	\begin{center}
-		\textbf{Promote self-hosting and small-scale hosting\\
-			as an alternative to large cloud providers}
-	\end{center}
-	\vspace{2em}
-	\visible<2->{
-		Why is it hard?
-	}
-	\visible<3->{
-		\vspace{2em}
-		\begin{center}
-			\textbf{\underline{Resilience}}\\
-			{\footnotesize we want good uptime/availability with low supervision}
-		\end{center}
-	}
-\end{frame}
-
-\begin{frame}
-	\frametitle{Building a resilient system with cheap stuff}
-
-	\only<1,4-7>{
-		\begin{itemize}
-			\item \textcolor<5->{gray}{Commodity hardware (e.g. old desktop PCs)\\
-				\vspace{.5em}
-				\visible<4->{{\footnotesize (can die at any time)}}}
-				\vspace{1.5em}
-			\item<5-> \textcolor<7->{gray}{Regular Internet (e.g. FTTB, FTTH) and power grid connections\\
-				\vspace{.5em}
-				\visible<6->{{\footnotesize (can be unavailable randomly)}}}
-				\vspace{1.5em}
-			\item<7-> \textbf{Geographical redundancy} (multi-site replication)
-		\end{itemize}
-	}
-	\only<2>{
-		\begin{center}
-			\includegraphics[width=.8\linewidth]{assets/neptune.jpg}
-		\end{center}
-	}
-	\only<3>{
-		\begin{center}
-			\includegraphics[width=.8\linewidth]{assets/atuin.jpg}
-		\end{center}
-	}
-	\only<8>{
-		\begin{center}
-			\includegraphics[width=.8\linewidth]{assets/inframap_jdll2023.pdf}
-		\end{center}
-	}
-\end{frame}
-
 \begin{frame}
 	\frametitle{Object storage: a crucial component}
 		\begin{center}