seafile-containerized/seafile-caddy/scripts/swarm-dns.sh

#!/bin/bash

cp /etc/caddy/Caddyfile /etc/caddy/Caddyfile.default

while true; do 

    SEAHUB_IPS=$(dig +short $SEAHUB_HOSTNAME | sed -e 's/$/:8000/' | tr ' ' '\n' | sort | tr '\n' ' ')
    SEAHUB_MEDIA_IPS=$(dig +short $SEAHUB_MEDIA_HOSTNAME | sed -e 's/$/:80/' | tr ' ' '\n' | sort | tr '\n' ' ')

    cp /etc/caddy/Caddyfile.default /etc/caddy/Caddyfile.tmp

    sed -i "s/$SEAHUB_HOSTNAME:8000/$(echo $SEAHUB_IPS)/g" /etc/caddy/Caddyfile.tmp
    sed -i "s/$SEAHUB_MEDIA_HOSTNAME:80/$(echo $SEAHUB_MEDIA_IPS)/g" /etc/caddy/Caddyfile.tmp

    if ! diff -q "/etc/caddy/Caddyfile" "/etc/caddy/Caddyfile.tmp"; then
        rm -f /etc/caddy/Caddyfile
        mv /etc/caddy/Caddyfile.tmp /etc/caddy/Caddyfile
        echo "Applying new Caddyfile:"
        cat /etc/caddy/Caddyfile
        caddy reload --config /etc/caddy/Caddyfile
    fi

    sleep 10

done