diff --git a/2025/observability/assets/agent.png b/2025/observability/assets/agent.png
new file mode 100644
index 0000000..f10719f
--- /dev/null
+++ b/2025/observability/assets/agent.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e8183795e30f18b44e9197a91a42a842267a94cc1f9ea321d6386661cb3937af
+size 55179
diff --git a/2025/observability/assets/apm.png b/2025/observability/assets/apm.png
new file mode 100644
index 0000000..3c3e7e2
--- /dev/null
+++ b/2025/observability/assets/apm.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:a1e92b252c370db90c43f920434390286dcad7d62937432764c8dc672880da32
+size 83886
diff --git a/2025/observability/assets/apm2.png b/2025/observability/assets/apm2.png
new file mode 100644
index 0000000..4cd309d
--- /dev/null
+++ b/2025/observability/assets/apm2.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:3e96e06fee6afb3c87b56cf1491793cd9e8fa27a097471c62de8c0ba7ed33399
+size 326308
diff --git a/2025/observability/assets/apm3.png b/2025/observability/assets/apm3.png
new file mode 100644
index 0000000..f0dcfda
--- /dev/null
+++ b/2025/observability/assets/apm3.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:51b768d549cc5ae2ea4dd4295187233fb9601dbba1180c62e3f1ce6a31f60328
+size 557069
diff --git a/2025/observability/assets/grafana_trace.png b/2025/observability/assets/grafana_trace.png
new file mode 100644
index 0000000..fd7bdb9
--- /dev/null
+++ b/2025/observability/assets/grafana_trace.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:f273da3df93d02cf1d492235e699b0a62f63a7976e5ec7b43fa014f742ba0db3
+size 187813
diff --git a/2025/observability/assets/hist.png b/2025/observability/assets/hist.png
new file mode 100644
index 0000000..0bcb41c
--- /dev/null
+++ b/2025/observability/assets/hist.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:51303d97e81d7c5d48a22528033c2e2b7e227e5ab0485c1d09a636a90c33fc11
+size 181110
diff --git a/2025/observability/assets/hist2.png b/2025/observability/assets/hist2.png
new file mode 100644
index 0000000..9221421
--- /dev/null
+++ b/2025/observability/assets/hist2.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1900ae47a3f9f660a108c4f4f1de80d1aa46e767b5d81f867a6a062823d734a7
+size 150089
diff --git a/2025/observability/assets/hist3.png b/2025/observability/assets/hist3.png
new file mode 100644
index 0000000..e634c3e
--- /dev/null
+++ b/2025/observability/assets/hist3.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:a4cdd6fe094558fa5ca527c84462dd290033b6ef929a8ab5476d33cf83cd4654
+size 162930
diff --git a/2025/observability/assets/http.png b/2025/observability/assets/http.png
new file mode 100644
index 0000000..8d93d92
--- /dev/null
+++ b/2025/observability/assets/http.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:d9594ad28cb495082bd5bba089481a80aa06746bb461e21942146eccae2ff8d8
+size 463570
diff --git a/2025/observability/assets/http2.png b/2025/observability/assets/http2.png
new file mode 100644
index 0000000..41b64f2
--- /dev/null
+++ b/2025/observability/assets/http2.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c1f3d033442355e73ea7b98c8f543aaaa8906080b0d31a83070e9c214ce47d21
+size 196893
diff --git a/2025/observability/assets/http3.png b/2025/observability/assets/http3.png
new file mode 100644
index 0000000..1eeafac
--- /dev/null
+++ b/2025/observability/assets/http3.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6326729606f9b2542ce82b410fe4c172ff64b618d5b8880deb7a8e08c59f274
+size 202182
diff --git a/2025/observability/assets/metrics.png b/2025/observability/assets/metrics.png
new file mode 100644
index 0000000..975d7b3
--- /dev/null
+++ b/2025/observability/assets/metrics.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:113b94a635fd00b061f155ca46f9846177412df827d32c499ba8b297c6dd402a
+size 595905
diff --git a/2025/observability/assets/observability.png b/2025/observability/assets/observability.png
new file mode 100644
index 0000000..9f23f6a
--- /dev/null
+++ b/2025/observability/assets/observability.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:88e7a352e65d26cd9c58b0bab2085e4ff1788407f1c667a06a270d34712194ad
+size 50293
diff --git a/2025/observability/assets/opentelemetry-horizontal-color.svg b/2025/observability/assets/opentelemetry-horizontal-color.svg
new file mode 100644
index 0000000..7294c15
--- /dev/null
+++ b/2025/observability/assets/opentelemetry-horizontal-color.svg
@@ -0,0 +1 @@
+
\ No newline at end of file
diff --git a/2025/observability/assets/questi.png b/2025/observability/assets/questi.png
new file mode 100644
index 0000000..7ad6176
--- /dev/null
+++ b/2025/observability/assets/questi.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:989083bb9dcd53d9825c3f2f54e7516c068762ac6a3b5932dd69af04bac61afd
+size 67913
diff --git a/2025/observability/assets/top.png b/2025/observability/assets/top.png
new file mode 100644
index 0000000..2e893f2
--- /dev/null
+++ b/2025/observability/assets/top.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:d9eff627ed381eca6e8fc4a965ef30d4c4b44b946c6e9d12faef8d819e61bd1d
+size 330668
diff --git a/2025/observability/assets/toto.png b/2025/observability/assets/toto.png
new file mode 100644
index 0000000..5303293
--- /dev/null
+++ b/2025/observability/assets/toto.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:784c02b53f8a6b35abd7bbc7034f7c1e0421a9890af3d402a6a57a88cce16d85
+size 242780
diff --git a/2025/observability/assets/waterfall-trace.svg b/2025/observability/assets/waterfall-trace.svg
new file mode 100644
index 0000000..e2cb919
--- /dev/null
+++ b/2025/observability/assets/waterfall-trace.svg
@@ -0,0 +1,49 @@
+
\ No newline at end of file
diff --git a/2025/observability/slides.md b/2025/observability/slides.md
new file mode 100644
index 0000000..2ad648b
--- /dev/null
+++ b/2025/observability/slides.md
@@ -0,0 +1,225 @@
+# Surveillance des applications
+
+---
+
+# Sommaire
+
+- Pourquoi ?
+ - Histoire de l'application
+- Quoi ?
+ - Métriques, logs et traces
+- Comment ?
+ -
+- Conclusion
+
+---
+
+
+
+---
+
+
+
+
+---
+
+
+
+---
+
+### Pistes d'amélioration
+
+- Détecter
+- Alerter
+- Prévenir
+
+---
+
+### Observabilité
+
+
+
+---
+
+### Observabilité
+
+> Source : opentelemetry : Introduction à l'observabilité
+
+---
+
+### Observabilité
+
+Différents types de données
+
+- Métriques
+- Logs
+- Traces
+
+---
+
+### Observabilité
+Métriques
+
+
+---
+
+### Métriques
+
+**Indicateur** d'un état à un instant T
+
+- utilisation du processeur
+- nombre de processus sur la machine
+- nombre de connections concurrentes à l'application
+- nombre de tâches celery en cours
+
+---
+
+### Observabilité
+Logs
+```
+66.249.70.99 - - [25/Jun/2025:11:23:07 +0200] "GET /item/AFST_1996_6_5_2_191_0/ HTTP/1.1" 200 9488 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
+```
+
+Message horodaté
+Flux d'évènement ordonné
+
+---
+
+### Observabilité
+Traces...
+
+
+---
+
+### Trace (Transaction)
+Chemin d'exécution de la requête à travers l'application
+
+--
+
+### Span (Intervalle)
+Unité de travail
+
+---
+
+### Traces
+
+
+----
+
+### Traces
+
+
+---
+
+### Application Performance Monitoring
+
+
+
+---
+
+### Application Performance Monitoring
+
+
+
+
+---
+
+### Application Performance Monitoring
+
+
+
+---
+
+### Application Performance Monitoring
+
+
+
+---
+
+### Un protocole pour tous les gérer
+
+
+
+---
+
+### Choix des logiciels
+
+- Agent
+- Base de données
+- Dashboard de visualisation
+
+---
+
+### Agent
+
+Récupérer les données et les envoyer dans une base de données.
+
+Classifier, filtrer, transformer.
+
+- OpenTelemetry exporter
+- Fluentd
+- Fluent bit
+- Grafana Alloy
+- Promtail
+- Logstash
+
+---
+
+### Base de données
+
+| Métriques | Logs | Traces |
+| ---------- | -------------- | ------ |
+| Prometheus | Elastic Search | Jaeger |
+| Graphite | Loki | Tempo |
+| InfluxDB | | |
+
+---
+
+### Dashboard de visualisation
+
+Le dashboard va se connecter à la base de données et executer des requêtes afin d'extraire les informations utiles.
+
+- Kibana
+- Grafana
+
+---
+
+### Solutions cloud
+
+- Datadog
+- Uptrace
+- Honeycomb
+
+
+---
+
+### Démo
+
+
+
+---
+
+### Démo : requête HTTP
+
+
+----
+
+### Démo : requête HTTP
+
+
+----
+
+### Démo : requête HTTP
+
+
+---
+
+### Démo: Métriques
+
+
+
+---
+
+### Ressources
+
+[Logs vs Metrics vs Traces](https://microsoft.github.io/code-with-engineering-playbook/observability/log-vs-metric-vs-trace/) : https://microsoft.github.io/code-with-engineering-playbook/observability/log-vs-metric-vs-trace/