From 3b4bbebc98db8411b996291ae30c5d15800ea107 Mon Sep 17 00:00:00 2001
From: Grégoire Détrez <gregoire@mullvad.net>
Date: Tue, 23 Aug 2022 17:23:42 +0200
Subject: Add metrics for log time and tree size

---
 sigsum-witness.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/sigsum-witness.py b/sigsum-witness.py
index 87e073e..5de433a 100755
--- a/sigsum-witness.py
+++ b/sigsum-witness.py
@@ -51,6 +51,12 @@ SIGNING_ERROR = prometheus.Counter(
 LAST_SUCCESS = prometheus.Gauge(
     "sigsum_witness_last_success", "Time of last successful signature"
 )
+LOG_TIME = prometheus.Gauge(
+    "sigsum_witness_log_time_unixtime", "Latest tree-head timestamp from the log."
+)
+TREE_SIZE = prometheus.Gauge(
+    "sigsum_witness_tree_size", "Latest tree size from the log."
+)
 
 ERR_OK                         = 0
 ERR_USAGE                      = os.EX_USAGE
@@ -546,6 +552,8 @@ class Witness(threading.Thread):
                 ERR_TREEHEAD_SIGNATURE_INVALID,
                 "ERROR: signature of current tree head invalid",
             )
+        LOG_TIME.set(new_tree_head.timestamp)
+        TREE_SIZE.set(new_tree_head.tree_size)
         err = sign_send_store_tree_head(
             self.signing_key, self.log_verification_key, new_tree_head
         )
-- 
cgit v1.2.3