add pdnsd

pdnsd/Dockerfile

@@ -0,0 +1,13 @@
+#
+# Dockerfile for pdnsd
+#
+
+FROM alpine
+MAINTAINER kev <noreply@datageek.info>
+
+RUN apk add -U pdnsd \
+    && rm -rf /var/cache/apk/*
+
+EXPOSE 53/tcp 53/udp
+
+CMD ["pdnsd"]

pdnsd/README.md

@@ -0,0 +1,23 @@
+pdnsd
+=====
+
+`pdnsd` is a proxy DNS server with permanent caching (the cache contents are
+written to hard disk on exit) that is designed to cope with unreachable or down
+DNS servers (for example in dial-in networking).
+
+Since version 1.1.0, pdnsd supports negative caching.
+
+## docker-compose.yml
+
+```
+pdnsd:
+  image: vimagick/pdnsd
+# volumes:
+#   - pdnsd.conf:/etc/pdnsd.conf
+  ports:
+    - "53:53/tcp"
+    - "53:53/udp"
+  restart: always
+```
+
+> Uncomment `volumes` to use customized config file.

pdnsd/docker-compose.yml

@@ -0,0 +1,6 @@
+pdnsd:
+  image: vimagick/pdnsd
+  ports:
+    - "53:53/tcp"
+    - "53:53/udp"
+  restart: always

pdnsd/pdnsd.conf

@@ -0,0 +1,51 @@
+#
+# Default Alpine Linux pdnsd config
+#
+# See /usr/share/pdnsd/pdnsd.conf.sample and the pdnsd.conf(5) manpage,
+# both available in the pdnsd-doc package.
+#
+# Comments can begin with either '#' or '//', and entire blocks may be
+# commented out with '/*' and '*/'.
+#
+global {
+        perm_cache=2048;
+        cache_dir="/var/cache/pdnsd";
+        run_as="pdnsd";
+        server_ip = any;
+        status_ctl = on;
+#       paranoid=on;       # This option reduces the chance of cache poisoning
+                           # but may make pdnsd less efficient, unfortunately.
+        min_ttl=15m;       # Retain cached entries at least 15 minutes.
+        max_ttl=1w;        # One week.
+        timeout=10;        # Global timeout option (10 seconds).
+        neg_domain_pol=on;
+}
+
+server {
+        label= "googledns";
+        ip = 8.8.8.8, 8.8.4.4;
+        proxy_only=on;
+        lean_query=on;
+        timeout=4;         # Server timeout; this may be much shorter
+                           # that the global timeout option.
+        uptest=none;
+        interval=10m;      # Check every 10 minutes.
+        purge_cache=off;
+}
+
+/*
+source {
+        owner=localhost;
+#       serve_aliases=on;
+        file="/etc/hosts";
+}
+*/
+
+rr {
+        name=localhost;
+        reverse=on;
+        a=127.0.0.1;
+#       a=::1;
+        owner=localhost;
+        soa=localhost,root.localhost,42,86400,900,86400,86400;
+}