Use a dedicated zone for health checking

Signed-off-by: Knut Ahlers <knut@ahlers.me>

Dockerfile

@@ -9,7 +9,9 @@ RUN set -ex \
       curl \
       git \
       make \
- && go get -v github.com/Luzifer/rootzone \
+ && go get -v \
+      github.com/Luzifer/korvike\
+      github.com/Luzifer/rootzone \
  && rootzone >named.stubs \
  && make blacklist
 
@@ -36,6 +38,6 @@ COPY                docker-entrypoint.sh  /usr/local/bin/
 EXPOSE 53/udp 53
 
 HEALTHCHECK --interval=30s --timeout=5s \
-  CMD dig +short @localhost health.server.test A || exit 1
+  CMD dig +short @localhost health.pdns.luzifer.io A || exit 1
 
 ENTRYPOINT ["/usr/local/bin/docker-entrypoint.sh"]

blacklist.tpl

@@ -4,7 +4,8 @@ $TTL 1H
                           NS    LOCALHOST.
 
 ; Healthcheck record - don't remove
-health.server.test  A 127.0.1.1
+health.pdns.luzifer.io    A     127.0.1.1
+version.pdns.luzifer.io   TXT   "{{ .version }} @ {{ now `2006-01-02 15:04:05 -07:00` }}"
 
 ; vim: set ft=bindzone:
 ; Blacklist entries

build_blacklist.sh

@@ -23,7 +23,11 @@ done
 cat blacklist.local >>${target}
 
 # Convert into named response-policy file
-cp blacklist.tpl named.${target}
+korvike \
+	-i blacklist.tpl \
+	-o named.${target} \
+	-v version=$(git describe --tags --always)
+
 awk '/^0.0.0.0/{ printf "%s  CNAME .\n", $2 }' blacklist |
 	grep -v '^0.0.0.0  ' |
 	sort >>named.${target}