In this branch I'm adding support for AWS Route53 Hosted Zones and also a rewrite of the dockerddns file. Other important change is that the files has been renamed from docker-ddns to dockerddns

dockerddns.json has changed the format, I removed the extra dockerddns key on it just to make it simple to parse it on the code.

This will be listening to docker events, and when an event is received it will gather the information of that container and update the dns based on that information. also will store the container in an in-memory cache , so if the container exits and docker is taking too long to update the event or take too long to reply to the information request, it still can use the cached information to remove the records from the dns, everytime a event is received a thread is started to gather the information and process the request, this way the program will not block waiting for a response. also no stale records should be left, unless the dockerddns process is killed.

docker run -it --rm
-v /var/run/docker.sock:/var/run/docker.sock
-v /myconfiglocation/secrets.json:/ddns/secrets.json
-v /myconfiglocation/dockerddns.json:/ddns/dockerddns.json
mbartsch/ddns:0

{
    "apiversion" : "auto",
    "dnsserver"  : "my.dns.server",
    "dnsport"    : 53,
    "keyname"    : "my.dns.key",
    "zonename"   : "dynamic.mydomain.ntld",
    "intprefix"  : "",
    "extprefix"  : "",
    "ipv6replace": false,
    "ttl"        : 60,
    "engine"     : "bind",
    "hostedzone" : "ROUTE53HOSTEDZONEID"
}

dnsserver   = hostname of bind
dnsport     = port used by bind , you can change it if 53 is blocked
keyname     = the keyname
zonename    = ddns zone
intprefix   = IPv6 prefix on the internal network
extprefix   = IPv6 on the external network
apiversion  = specify the api version to use when talking to the docker server, auto by default
engine      = dns engine, currently bind and aws route53
hostedzone  = Route53 Hosted Zone Id
ipv6replace = replace the intprefix with the extprefix, it just use a string replace. useful when
              you have dhcp-pd an docker is in a non routeable network and using nat with it.

for how to use intprefix, extprefix and ipv6replace please check this gists: https://gist.github.com/mbartsch/5f0b0ab414d3e901f38388792a88321c

{"my.key.file":"base64_encrypted_key"}

left side = key name as in named.conf right side = mykeyfilesecret in base64 , same as in named.conf

in your named.conf you must have:

key "my.key.file" {
  algorithm hmac-md5;
  secret "mykeyfilesecret";
};

zone "myddnszone.mydomain.xtld" IN {
        type master;
        file "dynamic/myddnszone.mydomain.xtld.zone";
        allow-update { key "my.key.file"; };
};

This guide explain in details the needed steps:

https://www.kirya.net/articles/running-a-secure-ddns-service-with-bind/

This is the list of features I'm planning to implement at some point, in no particular order

• SRV Records
• Cleanup Stale Records
• Dump Cache to file , so can recover and cleanup stale records