diff --git a/mypy.ini b/mypy.ini
--- a/mypy.ini
+++ b/mypy.ini
@@ -14,5 +14,9 @@
 [mypy-requests_mock.*]
 ignore_missing_imports = True
 
+[mypy-prometheus_client.*]
+ignore_missing_imports = True
+
+
 # [mypy-add_your_lib_here.*]
 # ignore_missing_imports = True
diff --git a/requirements.txt b/requirements.txt
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,5 @@
 click
 psycopg2
 requests
+prometheus-client
+typing
diff --git a/swh/icinga_plugins/base_check.py b/swh/icinga_plugins/base_check.py
--- a/swh/icinga_plugins/base_check.py
+++ b/swh/icinga_plugins/base_check.py
@@ -1,17 +1,32 @@
-# Copyright (C) 2019  The Software Heritage developers
+# Copyright (C) 2019-2022  The Software Heritage developers
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
+import atexit
+from typing import Any, Dict, List
+
+from prometheus_client import CollectorRegistry, Gauge, Summary, write_to_textfile
 
 
 class BaseCheck:
-    def __init__(self, obj):
+    PROMETHEUS_METRICS_BASENAME = "swh_e2e_"
+
+    def __init__(self, obj: Dict[str, str], application: str):
         self.warning_threshold = obj.get(
             "warning_threshold", self.DEFAULT_WARNING_THRESHOLD
         )
         self.critical_threshold = obj.get(
             "critical_threshold", self.DEFAULT_CRITICAL_THRESHOLD
         )
+        self.prometheus_enabled = obj.get("prometheus_enabled")
+        self.prometheus_exporter_directory = obj.get("prometheus_exporter_directory")
+        self.environment = obj.get("environment")
+        self.application = application
+
+        self.registry = CollectorRegistry()
+        self.prometheus_metrics: Dict[str, Any] = {}
+
+        atexit.register(self.save_prometheus_metrics)
 
     def get_status(self, value):
         if self.critical_threshold and value >= self.critical_threshold:
@@ -25,3 +40,81 @@
         print(f"{self.TYPE} {status_type} - {status_string}")
         for (metric_name, metric_value) in sorted(metrics.items()):
             print(f"| '{metric_name}' = {metric_value:.2f}s")
+
+    def observe_prometheus_metric(
+        self, name: str, value: float, labels: List[str] = []
+    ):
+        metric = self.prometheus_metrics.get(self.PROMETHEUS_METRICS_BASENAME + name)
+
+        if metric is None:
+            raise ValueError(f"No metric {name} found")
+
+        metric.labels(*self._get_label_values(labels)).observe(value)
+
+    def collect_prometheus_metric(
+        self, name: str, value: float, labels: List[str] = []
+    ):
+        g = self.prometheus_metrics.get(self.PROMETHEUS_METRICS_BASENAME + name)
+
+        if g is None:
+            raise ValueError(f"No metric {name} found")
+
+        g.labels(*self._get_label_values(labels)).set(value)
+
+    def _get_label_values(self, labels: List[str]) -> List[str]:
+        label_list = []
+
+        if self.environment:
+            label_list.append(self.environment)
+
+        if self.application is None:
+            raise ValueError("Application name must be specified")
+        label_list.append(self.application)
+
+        return label_list + labels
+
+    def _get_label_names(self, values: List[str] = []) -> List[str]:
+        full_list = []
+
+        if self.environment:
+            full_list.append(self.environment)
+        full_list.append("application")
+
+        full_list += values
+
+        return full_list
+
+    def register_prometheus_summary(
+        self, name: str, unit: str, labels: List[str] = []
+    ) -> Summary:
+        full_name = self.PROMETHEUS_METRICS_BASENAME + name
+
+        self.prometheus_metrics[full_name] = Summary(
+            full_name,
+            "",
+            registry=self.registry,
+            unit=unit,
+            labelnames=self._get_label_names(labels),
+        )
+
+    def register_prometheus_gauge(
+        self, name: str, unit: str, labels: List[str] = []
+    ) -> Gauge:
+        full_name = self.PROMETHEUS_METRICS_BASENAME + name
+
+        self.prometheus_metrics[full_name] = Gauge(
+            full_name,
+            "",
+            registry=self.registry,
+            unit=unit,
+            labelnames=self._get_label_names(labels),
+        )
+
+    def save_prometheus_metrics(self) -> None:
+        if self.prometheus_enabled:
+            assert self.prometheus_exporter_directory is not None
+
+            filename = (
+                self.prometheus_exporter_directory + "/" + self.application + ".prom"
+            )
+            write_to_textfile(filename, self.registry)
diff --git a/swh/icinga_plugins/cli.py b/swh/icinga_plugins/cli.py
--- a/swh/icinga_plugins/cli.py
+++ b/swh/icinga_plugins/cli.py
@@ -1,4 +1,4 @@
-# Copyright (C) 2019-2020  The Software Heritage developers
+# Copyright (C) 2019-2022  The Software Heritage developers
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
@@ -16,8 +16,22 @@
 @swh_cli_group.group(name="icinga_plugins", context_settings=CONTEXT_SETTINGS)
 @click.option("-w", "--warning", type=int, help="Warning threshold.")
 @click.option("-c", "--critical", type=int, help="Critical threshold.")
+@click.option("--prometheus-exporter/--no-prometheus-exporter", default=False)
+@click.option(
+    "--prometheus-exporter-directory",
+    type=str,
+    default="/var/lib/prometheus/node-exporter",
+)
+@click.option("--environment", type=str, help="The tested environment")
 @click.pass_context
-def icinga_cli_group(ctx, warning, critical):
+def icinga_cli_group(
+    ctx,
+    warning,
+    critical,
+    prometheus_exporter: bool,
+    prometheus_exporter_directory: str,
+    environment: str,
+):
     """Main command for Icinga plugins
     """
     ctx.ensure_object(dict)
@@ -26,6 +40,10 @@
     if critical:
         ctx.obj["critical_threshold"] = int(critical)
 
+    ctx.obj["prometheus_enabled"] = prometheus_exporter
+    ctx.obj["prometheus_exporter_directory"] = prometheus_exporter_directory
+    ctx.obj["environment"] = environment
+
 
 @icinga_cli_group.group(name="check-vault")
 @click.option(
diff --git a/swh/icinga_plugins/deposit.py b/swh/icinga_plugins/deposit.py
--- a/swh/icinga_plugins/deposit.py
+++ b/swh/icinga_plugins/deposit.py
@@ -1,4 +1,4 @@
-# Copyright (C) 2019-2020  The Software Heritage developers
+# Copyright (C) 2019-2022  The Software Heritage developers
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
@@ -19,7 +19,7 @@
     DEFAULT_CRITICAL_THRESHOLD = 3600
 
     def __init__(self, obj):
-        super().__init__(obj)
+        super().__init__(obj, application="deposit")
         self._poll_interval = obj["poll_interval"]
         self._archive_path = obj["archive"]
         self._metadata_path = obj["metadata"]
@@ -33,6 +33,9 @@
             }
         )
 
+        self.register_prometheus_gauge("duration", "seconds", ["step", "status"])
+        self.register_prometheus_gauge("status", "")
+
     def upload_deposit(self):
         slug = "check-deposit-%s" % datetime.datetime.now().isoformat()
         result = self._client.deposit_create(
@@ -80,6 +83,17 @@
                     f"started)",
                     **metrics,
                 )
+
+                self.collect_prometheus_metric(
+                    "duration",
+                    metrics["total_time"],
+                    [result["deposit_status"], "timeout"],
+                )
+                self.collect_prometheus_metric(
+                    "duration", metrics["total_time"], ["", "timeout"]
+                )
+                self.collect_prometheus_metric("status", 2)
+
                 sys.exit(2)
 
             time.sleep(self._poll_interval)
@@ -108,7 +122,17 @@
                 f'Deposit was rejected: {result["deposit_status_detail"]}',
                 **metrics,
             )
+            self.collect_prometheus_metric(
+                "duration", metrics["validation_time"], ["validation", "rejected"]
+            )
+            self.collect_prometheus_metric(
+                "duration", metrics["total_time"], ["validation", "rejected"]
+            )
+            self.collect_prometheus_metric("status", 2)
             return 2
+        self.collect_prometheus_metric(
+            "duration", metrics["validation_time"], ["validation", "ok"]
+        )
 
         # Wait for loading
         result = self.wait_while_status(
@@ -118,6 +142,9 @@
         metrics["load_time"] = (
             metrics["total_time"] - metrics["upload_time"] - metrics["validation_time"]
         )
+        self.collect_prometheus_metric(
+            "duration", metrics["load_time"], ["loading", result["deposit_status"]]
+        )
 
         # Check loading succeeded
         if result["deposit_status"] == "failed":
@@ -126,6 +153,10 @@
                 f'Deposit loading failed: {result["deposit_status_detail"]}',
                 **metrics,
             )
+            self.collect_prometheus_metric(
+                "duration", metrics["total_time"], ["total", "failed"]
+            )
+            self.collect_prometheus_metric("status", 2)
             return 2
 
         # Check for unexpected status
@@ -136,6 +167,10 @@
                 f'({result["deposit_status_detail"]})',
                 **metrics,
             )
+            self.collect_prometheus_metric(
+                "duration", metrics["total_time"], ["total", result["deposit_status"]]
+            )
+            self.collect_prometheus_metric("status", 2)
             return 2
 
         # Everything went fine, check total time wasn't too large and
@@ -148,6 +183,7 @@
         )
 
         if status_code != 0:  # Stop if any problem in the initial scenario
+            self.collect_prometheus_metric("status", 2)
             return status_code
 
         # Initial deposit is now completed, now we can update the deposit with metadata
@@ -169,6 +205,10 @@
                 f'Deposit Metadata update failed: {result["error"]} ',
                 **metrics_update,
             )
+            self.collect_prometheus_metric(
+                "duration", metrics["total_time"], ["total", "metadata_error"]
+            )
+            self.collect_prometheus_metric("status", 2)
             return 2
 
         (status_code, status) = self.get_status(metrics_update["total_time"])
@@ -178,4 +218,9 @@
             "and succeeded.",
             **metrics_update,
         )
+
+        self.collect_prometheus_metric(
+            "duration", metrics["total_time"], ["total", "done"]
+        )
+        self.collect_prometheus_metric("status", status_code)
         return status_code
diff --git a/swh/icinga_plugins/save_code_now.py b/swh/icinga_plugins/save_code_now.py
--- a/swh/icinga_plugins/save_code_now.py
+++ b/swh/icinga_plugins/save_code_now.py
@@ -21,12 +21,15 @@
     DEFAULT_CRITICAL_THRESHOLD = 120
 
     def __init__(self, obj: Dict, origin: str, visit_type: str) -> None:
-        super().__init__(obj)
+        super().__init__(obj, application="scn")
         self.api_url = obj["swh_web_url"].rstrip("/")
         self.poll_interval = obj["poll_interval"]
         self.origin = origin
         self.visit_type = visit_type
 
+        self.register_prometheus_gauge("duration", "seconds", ["status"])
+        self.register_prometheus_gauge("status", "")
+
     @staticmethod
     def api_url_scn(root_api_url: str, origin: str, visit_type: str) -> str:
         """Compute the save code now api url for a given origin"""
@@ -85,6 +88,8 @@
                     f'and has status: {result["save_task_status"]}.',
                     total_time=total_time,
                 )
+                self.collect_prometheus_metric("duration", total_time, ["timeout"])
+                self.collect_prometheus_metric("status", 2)
                 return 2
 
         if result[status_key] == "succeeded":
@@ -94,6 +99,8 @@
                 f"{REPORT_MSG} {origin_info} took {total_time:.2f}s and succeeded.",
                 total_time=total_time,
             )
+            self.collect_prometheus_metric("duration", total_time, ["succeeded"])
+            self.collect_prometheus_metric("status", status_code)
             return status_code
         elif result[status_key] == "failed":
             self.print_result(
@@ -101,6 +108,8 @@
                 f"{REPORT_MSG} {origin_info} took {total_time:.2f}s and failed.",
                 total_time=total_time,
             )
+            self.collect_prometheus_metric("duration", total_time, ["failed"])
+            self.collect_prometheus_metric("status", 2)
             return 2
         else:
             self.print_result(
@@ -110,4 +119,6 @@
                 f"{result['save_request_status']} ; {result[status_key]}.",
                 total_time=total_time,
             )
+            self.collect_prometheus_metric("duration", total_time, ["failed"])
+            self.collect_prometheus_metric("status", 2)
             return 2
diff --git a/swh/icinga_plugins/tests/test_deposit.py b/swh/icinga_plugins/tests/test_deposit.py
--- a/swh/icinga_plugins/tests/test_deposit.py
+++ b/swh/icinga_plugins/tests/test_deposit.py
@@ -1,4 +1,4 @@
-# Copyright (C) 2019-2021  The Software Heritage developers
+# Copyright (C) 2019-2022  The Software Heritage developers
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
@@ -204,6 +204,9 @@
 
     result = invoke(
         [
+            "--prometheus-exporter",
+            "--prometheus-exporter-directory",
+            "/tmp",
             "check-deposit",
             *COMMON_OPTIONS,
             "single",
@@ -270,6 +273,9 @@
 
     result = invoke(
         [
+            "--prometheus-exporter",
+            "--prometheus-exporter-directory",
+            "/tmp",
             "check-deposit",
             *COMMON_OPTIONS,
             "single",
@@ -326,6 +332,9 @@
 
     result = invoke(
         [
+            "--prometheus-exporter",
+            "--prometheus-exporter-directory",
+            "/tmp",
             "check-deposit",
             *COMMON_OPTIONS,
             "single",
@@ -373,6 +382,9 @@
 
     result = invoke(
         [
+            "--prometheus-exporter",
+            "--prometheus-exporter-directory",
+            "/tmp",
             "--warning",
             "15",
             "check-deposit",
@@ -420,6 +432,9 @@
         [
             "--critical",
             "50",
+            "--prometheus-exporter",
+            "--prometheus-exporter-directory",
+            "/tmp",
             "check-deposit",
             *COMMON_OPTIONS,
             "single",
@@ -469,6 +484,9 @@
 
     result = invoke(
         [
+            "--prometheus-exporter",
+            "--prometheus-exporter-directory",
+            "/tmp",
             "check-deposit",
             *COMMON_OPTIONS,
             "single",
@@ -508,6 +526,9 @@
 
     result = invoke(
         [
+            "--prometheus-exporter",
+            "--prometheus-exporter-directory",
+            "/tmp",
             "check-deposit",
             *COMMON_OPTIONS,
             "single",
@@ -552,6 +573,9 @@
 
     result = invoke(
         [
+            "--prometheus-exporter",
+            "--prometheus-exporter-directory",
+            "/tmp",
             "check-deposit",
             *COMMON_OPTIONS,
             "single",
diff --git a/swh/icinga_plugins/tests/test_save_code_now.py b/swh/icinga_plugins/tests/test_save_code_now.py
--- a/swh/icinga_plugins/tests/test_save_code_now.py
+++ b/swh/icinga_plugins/tests/test_save_code_now.py
@@ -1,4 +1,4 @@
-# Copyright (C) 2021  The Software Heritage developers
+# Copyright (C) 2021-2022  The Software Heritage developers
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
@@ -76,6 +76,8 @@
     # fmt: off
     result = invoke(
         [
+            "--prometheus-exporter",
+            "--prometheus-exporter-directory", "/tmp",
             "check-savecodenow", "--swh-web-url", root_api_url,
             "origin", origin,
             "--visit-type", visit_type,
@@ -206,7 +208,8 @@
     # fmt: off
     result = invoke(
         [
-            "check-savecodenow", "--swh-web-url", root_api_url,
+            "check-savecodenow",
+            "--swh-web-url", root_api_url,
             "origin", origin,
             "--visit-type", visit_type,
         ],
diff --git a/swh/icinga_plugins/tests/test_vault.py b/swh/icinga_plugins/tests/test_vault.py
--- a/swh/icinga_plugins/tests/test_vault.py
+++ b/swh/icinga_plugins/tests/test_vault.py
@@ -132,6 +132,9 @@
 
     result = invoke(
         [
+            "--prometheus-exporter",
+            "--prometheus-exporter-directory",
+            "/tmp",
             "check-vault",
             "--swh-web-url",
             "mock://swh-web.example.org",
@@ -166,6 +169,9 @@
 
     result = invoke(
         [
+            "--prometheus-exporter",
+            "--prometheus-exporter-directory",
+            "/tmp",
             "check-vault",
             "--swh-web-url",
             "mock://swh-web.example.org",
@@ -201,6 +207,9 @@
 
     result = invoke(
         [
+            "--prometheus-exporter",
+            "--prometheus-exporter-directory",
+            "/tmp",
             "check-vault",
             "--swh-web-url",
             "mock://swh-web.example.org",
@@ -238,6 +247,9 @@
 
     result = invoke(
         [
+            "--prometheus-exporter",
+            "--prometheus-exporter-directory",
+            "/tmp",
             "check-vault",
             "--swh-web-url",
             "mock://swh-web.example.org",
@@ -266,6 +278,9 @@
 
     result = invoke(
         [
+            "--prometheus-exporter",
+            "--prometheus-exporter-directory",
+            "/tmp",
             "check-vault",
             "--swh-web-url",
             "mock://swh-web.example.org",
diff --git a/swh/icinga_plugins/vault.py b/swh/icinga_plugins/vault.py
--- a/swh/icinga_plugins/vault.py
+++ b/swh/icinga_plugins/vault.py
@@ -1,4 +1,4 @@
-# Copyright (C) 2019  The Software Heritage developers
+# Copyright (C) 2019-2022  The Software Heritage developers
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
@@ -22,11 +22,14 @@
     DEFAULT_CRITICAL_THRESHOLD = 3600
 
     def __init__(self, obj):
-        super().__init__(obj)
+        super().__init__(obj, application="vault")
         self._swh_storage = get_storage("remote", url=obj["swh_storage_url"])
         self._swh_web_url = obj["swh_web_url"]
         self._poll_interval = obj["poll_interval"]
 
+        self.register_prometheus_gauge("status", "")
+        self.register_prometheus_gauge("duration", "seconds", ["step", "status"])
+
     def _url_for_dir(self, dir_id):
         return self._swh_web_url + f"/api/1/vault/directory/{dir_id.hex()}/"
 
@@ -71,30 +74,50 @@
                     f'{result["progress_message"]}',
                     total_time=total_time,
                 )
+
+                self.collect_prometheus_metric("status", 2)
+                self.collect_prometheus_metric(
+                    "duration", total_time, ["cooking", "timeout"],
+                )
+
                 return 2
 
-        if result["status"] == "done":
-            (status_code, status) = self.get_status(total_time)
+        exit_code = 0
+        status = result["status"]
+        prometheus_status = status
+
+        if status == "done":
+            (exit_code, state) = self.get_status(total_time)
             self.print_result(
-                status,
+                state,
                 f"cooking directory {dir_id.hex()} took {total_time:.2f}s "
                 f"and succeeded.",
                 total_time=total_time,
             )
-            return status_code
-        elif result["status"] == "failed":
+
+        elif status == "failed":
             self.print_result(
                 "CRITICAL",
                 f"cooking directory {dir_id.hex()} took {total_time:.2f}s "
                 f'and failed with: {result["progress_message"]}',
                 total_time=total_time,
             )
-            return 2
+
+            exit_code = 2
+
         else:
             self.print_result(
                 "CRITICAL",
                 f"cooking directory {dir_id.hex()} took {total_time:.2f}s "
-                f'and resulted in unknown status: {result["status"]}',
+                f"and resulted in unknown status: {status}",
                 total_time=total_time,
             )
-            return 2
+
+            prometheus_status = "unknown"
+            exit_code = 2
+
+        self.collect_prometheus_metric("status", exit_code)
+        self.collect_prometheus_metric(
+            "duration", total_time, ["end", prometheus_status],
+        )
+        return exit_code