From aecc42cd300e186ccab85c4bf8deed1b0dd602d9 Mon Sep 17 00:00:00 2001
From: Paul Buetow <paul@buetow.org>
Date: Thu, 21 Mar 2024 20:33:39 +0200
Subject: make CRON send out an email on DNS failover change

---
 frontends/scripts/dns-failover.ksh | 25 +++++++++++++------------
 1 file changed, 13 insertions(+), 12 deletions(-)

(limited to 'frontends/scripts')

diff --git a/frontends/scripts/dns-failover.ksh b/frontends/scripts/dns-failover.ksh
index 6fced80..c2879f3 100644
--- a/frontends/scripts/dns-failover.ksh
+++ b/frontends/scripts/dns-failover.ksh
@@ -87,7 +87,7 @@ failover_zone () {
     if diff -u $zone_file.old.noserial.tmp $zone_file.new.noserial.tmp; then
         echo "The zone $zone_file hasn't changed"
         rm $zone_file.*.tmp
-        return
+        return 0
     fi
 
     cp $zone_file $zone_file.bak
@@ -103,7 +103,7 @@ failover_zone () {
         echo "Reloading nsd"
         nsd-control reload
         zone_is_ok $zone
-        exit 1
+        return 2
     fi
 
     for cleanup in invalid bak; do
@@ -113,21 +113,22 @@ failover_zone () {
     done
 
     echo "Failover of zone $zone to $MASTER completed"
-    return 0
+    return 1
 }
 
 main () {
-    local -r mail_tmp=$(mktemp)
-
-    determine_master_and_standby | tee $mail_tmp
+    local -i ec=0
+    if ! determine_master_and_standby; then
+        ec=1
+    fi
     for zone_file in $ZONES_DIR/*.zone; do
-        failover_zone $zone_file
-    done | tee -a $mail_tmp
+        if ! failover_zone $zone_file; then
+            ec=1
+        fi
+    done
 
-    if grep -q 'Failover.*completed' $mail_tmp; then
-        cat $mail_tmp | mail -s 'DNS failover performed' root
-    fi
-    rm $mail_tmp
+    # ec other than 0 will tell CRON to send out an email!
+    exit $ec
 }
 
 main
-- 
cgit v1.2.3