diff --git a/blackbox/blackbox.yml b/blackbox/blackbox.yml
index ad94a31..4f09e06 100644
--- a/blackbox/blackbox.yml
+++ b/blackbox/blackbox.yml
@@ -3,7 +3,7 @@ modules:
     prober: http
     timeout: 5s
     http:
-      valid_status_codes: []
+      valid_status_codes: [200]
       method: GET
       preferred_ip_protocol: "ip4"
       tls_config:
diff --git a/docker-compose.core.yml b/docker-compose.core.yml
index 2860ae0..330f802 100644
--- a/docker-compose.core.yml
+++ b/docker-compose.core.yml
@@ -20,7 +20,7 @@ services:
             - prometheus_network
 
     woodpecker_server:
-        image: woodpeckerci/woodpecker-server:v3.16-alpine
+        image: woodpeckerci/woodpecker-server:v3.17-alpine
         volumes:
             - woodpeckerdata:/var/lib/woodpecker/
         entrypoint: /bin/sh -c "export WOODPECKER_GITEA_CLIENT=$$(cat /run/secrets/woodpecker_gitea_client) && export WOODPECKER_GITEA_SECRET=$$(cat /run/secrets/woodpecker_gitea_secret) && export WOODPECKER_AGENT_SECRET=$$(cat /run/secrets/woodpecker_agent_secret) && /bin/woodpecker-server"
@@ -37,7 +37,7 @@ services:
             - woodpecker_gitea_secret
 
     woodpecker_agent:
-        image: woodpeckerci/woodpecker-agent:v3.16-alpine
+        image: woodpeckerci/woodpecker-agent:v3.17-alpine
         volumes:
             - /var/run/docker.sock:/var/run/docker.sock
         entrypoint: /bin/sh -c "export WOODPECKER_AGENT_SECRET=$$(cat /run/secrets/woodpecker_agent_secret) && /bin/woodpecker-agent"
@@ -51,7 +51,7 @@ services:
             - woodpecker_agent_secret
 
     gitea:
-        image: docker.gitea.com/gitea:1.27.0
+        image: docker.gitea.com/gitea:1.27.1
         environment:
             - USER_UID=1000
             - USER_GID=1000
diff --git a/docker-compose.observability.yml b/docker-compose.observability.yml
index 2028543..e586468 100644
--- a/docker-compose.observability.yml
+++ b/docker-compose.observability.yml
@@ -57,10 +57,16 @@ services:
         configs:
             - source: otel_collector_config
               target: /etc/otelcol-contrib/config.yaml
+        volumes:
+            - /:/hostfs:ro
+            - /proc:/hostfs/proc:ro
+            - /sys:/hostfs/sys:ro
+            - /dev:/hostfs/dev:ro
+            - /run:/hostfs/run:ro
         deploy:
             resources:
                 limits:
-                    memory: 256M
+                    memory: 512M
         networks:
             - prometheus_network
 
diff --git a/otel-collector/config.yaml b/otel-collector/config.yaml
index 84c3feb..2b76ef4 100644
--- a/otel-collector/config.yaml
+++ b/otel-collector/config.yaml
@@ -3,6 +3,17 @@ receivers:
     protocols:
       http:
         endpoint: 0.0.0.0:4318
+  hostmetrics:
+    root_path: /hostfs
+    collection_interval: 10s
+    scrapers:
+      cpu:
+      memory:
+      disk:
+      filesystem:
+      network:
+      load:
+      processes:
   prometheus:
     config:
       scrape_configs:
@@ -18,11 +29,32 @@ receivers:
           scrape_interval: 10s
           static_configs:
             - targets: ['herald:9100']
+        - job_name: alertmanager
+          scrape_interval: 10s
+          static_configs:
+            - targets: ['alertmanager:9093']
+        - job_name: blackbox_http
+          scrape_interval: 10s
+          metrics_path: /probe
+          params:
+            module: [http_2xx]
+          static_configs:
+            - targets:
+              - https://www.qpismont.fr
+              - https://gitea.qpismont.fr
+              - https://woodpecker.qpismont.fr
+          relabel_configs:
+            - source_labels: [__address__]
+              target_label: __param_target
+            - source_labels: [__param_target]
+              target_label: instance
+            - target_label: __address__
+              replacement: blackbox_exporter:9115
 
 processors:
   memory_limiter:
     check_interval: 5s
-    limit_mib: 200
+    limit_mib: 400
     spike_limit_mib: 50
   batch:
     timeout: 10s
@@ -35,12 +67,20 @@ exporters:
     endpoint: http://tempo:4318
 
 service:
+  telemetry:
+    metrics:
+      readers:
+        - pull:
+            exporter:
+              prometheus:
+                host: 0.0.0.0
+                port: 8888
   pipelines:
     metrics:
-      receivers: [otlp, prometheus]
+      receivers: [otlp, prometheus, hostmetrics]
       processors: [memory_limiter, batch]
       exporters: [prometheusremotewrite]
     traces:
       receivers: [otlp]
       processors: [memory_limiter, batch]
-      exporters: [otlphttp/tempo]
\ No newline at end of file
+      exporters: [otlphttp/tempo]
diff --git a/portfolio/index.html b/portfolio/index.html
index f72d7d6..47f7091 100644
--- a/portfolio/index.html
+++ b/portfolio/index.html
@@ -3,11 +3,11 @@
 <head>
 <meta charset="UTF-8">
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
-<meta name="description" content="Portfolio of a platform / infrastructure engineer: distributed systems, observability, security and self-hosted CI/CD, tested in production.">
-<title>Portfolio — Platform Engineer</title>
+<meta name="description" content="Portfolio of Quentin Pismont, senior/lead platform engineer: distributed systems, observability, security and self-hosted CI/CD, tested in production.">
+<title>Quentin Pismont — Senior/Lead Platform Engineer</title>
 <!-- Open Graph -->
 <meta property="og:type" content="website">
-<meta property="og:title" content="Portfolio — Platform Engineer">
+<meta property="og:title" content="Quentin Pismont — Senior/Lead Platform Engineer">
 <meta property="og:description" content="Self-hosted infrastructure running in production, a security-first AI agent in Rust, and a distributed media pipeline. Source code available.">
 <style>
   :root {
@@ -371,8 +371,7 @@
     <div class="about-grid reveal">
       <div>
         <p>
-          Developer for <strong>over 20 years</strong> (first lines of C at age 10),
-          working as an engineer for <strong>10 years</strong>. My specialty: designing coherent
+          Working as an engineer for <strong>10 years</strong>. My specialty: designing coherent
           distributed systems and keeping them operable over time.
         </p>
         <p>
diff --git a/prometheus/alert.rules.yml b/prometheus/alert.rules.yml
index 6deb4d9..a63698d 100644
--- a/prometheus/alert.rules.yml
+++ b/prometheus/alert.rules.yml
@@ -9,3 +9,19 @@ groups:
         annotations:
           summary: "{{ $labels.instance }} est down"
           description: "Le service {{ $labels.instance }} ne répond plus depuis plus d'1 minute."
+      - alert: OtelCollectorDown
+        expr: up{job="otel-collector"} == 0
+        for: 1m
+        labels:
+          severity: critical
+        annotations:
+          summary: "OTel Collector est down"
+          description: "L'OTel Collector ne répond plus depuis plus d'1 minute."
+      - alert: CaddyDown
+        expr: up{job="reverse_caddy"} == 0
+        for: 1m
+        labels:
+          severity: critical
+        annotations:
+          summary: "Caddy est down"
+          description: "Le reverse proxy Caddy ne répond plus depuis plus d'1 minute."
diff --git a/prometheus/alertmanager/alertmanager.yml b/prometheus/alertmanager/alertmanager.yml
index f1d36e4..26bfd21 100644
--- a/prometheus/alertmanager/alertmanager.yml
+++ b/prometheus/alertmanager/alertmanager.yml
@@ -4,6 +4,12 @@ route:
   repeat_interval: 8760h
   group_wait: 10s
 
+inhibit_rules:
+  - source_matchers:
+      - alertname = "CaddyDown"
+    target_matchers:
+      - alertname = "ServiceDown"
+
 receivers:
   - name: ntfy
     webhook_configs:
diff --git a/prometheus/prometheus.yml b/prometheus/prometheus.yml
index 3a92b01..ad7863b 100644
--- a/prometheus/prometheus.yml
+++ b/prometheus/prometheus.yml
@@ -11,23 +11,7 @@ alerting:
           - alertmanager:9093
 
 scrape_configs:
- - job_name: alertmanager
+ - job_name: otel-collector
    static_configs:
     - targets:
-      - alertmanager:9093
- - job_name: blackbox_http
-   metrics_path: /probe
-   params:
-     module: [http_2xx]
-   static_configs:
-    - targets:
-      - https://www.qpismont.fr
-      - https://gitea.qpismont.fr
-      - https://woodpecker.qpismont.fr
-   relabel_configs:
-    - source_labels: [__address__]
-      target_label: __param_target
-    - source_labels: [__param_target]
-      target_label: instance
-    - target_label: __address__
-      replacement: blackbox_exporter:9115
\ No newline at end of file
+      - otel-collector:8888
\ No newline at end of file