diff options
| -rw-r--r-- | frontends/scripts/dns-failover.ksh | 30 |
1 files changed, 17 insertions, 13 deletions
diff --git a/frontends/scripts/dns-failover.ksh b/frontends/scripts/dns-failover.ksh index f578e3c..5ab96bb 100644 --- a/frontends/scripts/dns-failover.ksh +++ b/frontends/scripts/dns-failover.ksh @@ -9,7 +9,7 @@ determine_master_and_standby () { local standby=$DEFAULT_STANDBY # Weekly auto-failover for Let's Encrypt automation - local -i week_of_the_year=$(date +%U) + local -i -r week_of_the_year=$(date +%U) if [ $(( week_of_the_year % 2 )) -ne 0 ]; then local tmp=$master master=$standby @@ -64,14 +64,14 @@ transform () { } zone_is_ok () { - local zone=$1 - local domain=${zone%.zone} + local -r zone=$1 + local -r domain=${zone%.zone} dig $domain @localhost | grep -q "$domain.*IN.*NS" } failover_zone () { - local zone_file=$1 - local zone=$(basename $zone_file) + local -r zone_file=$1 + local -r zone=$(basename $zone_file) # Race condition (e.g. script execution abored in the middle previous run) if [ -f $zone_file.bak ]; then @@ -93,12 +93,14 @@ failover_zone () { cp $zone_file $zone_file.bak mv $zone_file.new.tmp $zone_file rm $zone_file.*.tmp + echo "Reloading nsd" nsd-control reload if ! zone_is_ok $zone; then echo "Rolling back $zone_file changes" cp $zone_file $zone_file.invalid mv $zone_file.bak $zone_file + echo "Reloading nsd" nsd-control reload zone_is_ok $zone return 1 @@ -113,15 +115,17 @@ failover_zone () { } main () { - determine_master_and_standby + local -r mail_tmp=$(mktemp) + + determine_master_and_standby | tee $mail_tmp for zone_file in $ZONES_DIR/*.zone; do failover_zone $zone_file - done -} + done | tee -a $mail_tmp -main | tee /tmp/dns-failover-notification.tmp + if grep -q 'Failover.*completed' $mail_tmp; then + cat $mail_tmp | mail -s 'DNS failover performed' root + fi + rm $mail_tmp +} -if grep -q 'Failover.*completed' /tmp/dns-failover-notification.tmp; then - cat /tmp/dns-failover-notification.tmp | mail -s 'DNS failover performed' root - rm /tmp/dns-failover-notification.tmp -fi +main |