Update content for md

1 files changed, 0 insertions, 133 deletions

diff --git a/gemfeed/examples/conf/frontends/scripts/dns-failover.ksh b/gemfeed/examples/conf/frontends/scripts/dns-failover.ksh
deleted file mode 100644
index dfc24ee3..00000000
--- a/gemfeed/examples/conf/frontends/scripts/dns-failover.ksh
+++ /dev/null
@@ -1,133 +0,0 @@
-#!/bin/ksh
-
-ZONES_DIR=/var/nsd/zones/master/
-DEFAULT_MASTER=fishfinger.buetow.org
-DEFAULT_STANDBY=blowfish.buetow.org
-
-determine_master_and_standby () {
-    local master=$DEFAULT_MASTER
-    local standby=$DEFAULT_STANDBY
-
-    # Weekly auto-failover for Let's Encrypt automation
-    local -i -r week_of_the_year=$(date +%U)
-    if [ $(( week_of_the_year % 2 )) -ne 0 ]; then
-        local tmp=$master
-        master=$standby
-        standby=$tmp
-    fi
-
-    local -i health_ok=1
-    if ! ftp -4 -o - https://$master/index.txt | grep -q "Welcome to $master"; then
-        echo "https://$master/index.txt IPv4 health check failed"
-        health_ok=0
-    elif ! ftp -6 -o - https://$master/index.txt | grep -q "Welcome to $master"; then
-        echo "https://$master/index.txt IPv6 health check failed"
-        health_ok=0
-    fi
-
-    if [ $health_ok -eq 0 ]; then
-        local tmp=$master
-        master=$standby
-        standby=$tmp
-    fi
-
-    echo "Master is $master, standby is $standby"
-
-    host $master | awk '/has address/ { print $(NF) }' >/var/nsd/run/master_a
-    host $master | awk '/has IPv6 address/ { print $(NF) }' >/var/nsd/run/master_aaaa
-    host $standby | awk '/has address/ { print $(NF) }' >/var/nsd/run/standby_a
-    host $standby | awk '/has IPv6 address/ { print $(NF) }' >/var/nsd/run/standby_aaaa
-}
-
-transform () {
-    sed -E '
-        /IN A .*; Enable failover/ {
-            /^standby/! {
-                s/^(.*) 300 IN A (.*) ; (.*)/\1 300 IN A '$(cat /var/nsd/run/master_a)' ; \3/;
-            }
-            /^standby/ {
-                s/^(.*) 300 IN A (.*) ; (.*)/\1 300 IN A '$(cat /var/nsd/run/standby_a)' ; \3/;
-            }
-        }
-        /IN AAAA .*; Enable failover/ {
-            /^standby/! {
-                s/^(.*) 300 IN AAAA (.*) ; (.*)/\1 300 IN AAAA '$(cat /var/nsd/run/master_aaaa)' ; \3/;
-            }
-            /^standby/ {
-                s/^(.*) 300 IN AAAA (.*) ; (.*)/\1 300 IN AAAA '$(cat /var/nsd/run/standby_aaaa)' ; \3/;
-            }
-        }
-        / ; serial/ {
-            s/^( +) ([0-9]+) .*; (.*)/\1 '$(date +%s)' ; \3/;
-        }
-    '
-}
-
-zone_is_ok () {
-    local -r zone=$1
-    local -r domain=${zone%.zone}
-    dig $domain @localhost | grep -q "$domain.*IN.*NS"
-}
-
-failover_zone () {
-    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
-        mv $zone_file.bak $zone_file
-    fi
-
-    cat $zone_file | transform > $zone_file.new.tmp 
-
-    grep -v ' ; serial' $zone_file.new.tmp > $zone_file.new.noserial.tmp
-    grep -v ' ; serial' $zone_file > $zone_file.old.noserial.tmp
-
-    echo "Has zone $zone_file changed?"
-    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 0
-    fi
-
-    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 3
-    fi
-
-    for cleanup in invalid bak; do
-        if [ -f $zone_file.$cleanup ]; then
-            rm $zone_file.$cleanup
-        fi
-    done
-
-    echo "Failover of zone $zone to $MASTER completed"
-    return 1
-}
-
-main () {
-    determine_master_and_standby
-
-    local -i ec=0
-    for zone_file in $ZONES_DIR/*.zone; do
-        if ! failover_zone $zone_file; then
-            ec=1
-        fi
-    done
-
-    # ec other than 0: CRON will send out an E-Mail.
-    exit $ec
-}
-
-main