D("example.com", REG_MY_PROVIDER, DnsProvider(DSP_MY_PROVIDER),
A("@", "1.2.3.4"), // The naked or "apex" domain.
A("server1", "2.3.4.5"),
AAAA("wide", "2001:0db8:85a3:0000:0000:8a2e:0370:7334"),
CNAME("www", "server1"),
CNAME("another", "service.mycloud.com."),
MX("mail", 10, "mailserver"),
MX("mail", 20, "mailqueue"),
TXT("the", "message"),
NS("department2", "ns1.dnsexample.com."), // use different nameservers
NS("department2", "ns2.dnsexample.com."), // for department2.example.com
);
Set TTLs
dnsconfig.js
var mailTTL = TTL("1h");
D("example.com", REG_MY_PROVIDER,
NAMESERVER_TTL("10m"), // On domain apex NS RRs
DefaultTTL("5m"), // Default for a domain
MX("@", 5, "1.2.3.4", mailTTL), // use variable to
MX("@", 10, "4.3.2.1", mailTTL), // set TTL
A("@", "1.2.3.4", TTL("10m")), // individual record
CNAME("mail", "mx01"), // TTL of 5m, as defined per DefaultTTL()
);
NOTE: The IP() function doesn't currently support IPv6 (PRs welcome!). IPv6 addresses are strings.
dnsconfig.js
var addrAAAA = "0:0:0:0:0:0:0:0";
Variables to swap active Data Center
dnsconfig.js
var DSP_R53 = NewDnsProvider("route53_user1");
var dcA = IP("5.5.5.5");
var dcB = IP("6.6.6.6");
// switch to dcB to failover
var activeDC = dcA;
D("example.com", REG_MY_PROVIDER, DnsProvider(DSP_R53),
A("@", activeDC + 5), // fixed address based on activeDC
);
var DSP_R53 = NewDnsProvider("route53_user1");
var DSP_GCLOUD = NewDnsProvider("gcloud_admin");
D("example.com", REG_MY_PROVIDER, DnsProvider(DSP_R53), DnsProvider(DSP_GCLOUD),
A("@", "1.2.3.4"),
);
// above zone uses 8 NS records total (4 from each provider dynamically gathered)
// below zone will only take 2 from each for a total of 4. May be better for performance reasons.
D("example2.com", REG_MY_PROVIDER, DnsProvider(DSP_R53, 2), DnsProvider(DSP_GCLOUD ,2),
A("@", "1.2.3.4"),
);
// or set a Provider as a non-authoritative backup (don"t register its nameservers)
D("example3.com", REG_MY_PROVIDER, DnsProvider(DSP_R53), DnsProvider(DSP_GCLOUD, 0),
A("@", "1.2.3.4"),
);
Automate Fastmail DKIM records
In this example we need a macro that can dynamically change for each domain.
Suppose you have many domains that use Fastmail as an MX. Here's a macro that sets the MX records.
Fastmail also supplied CNAMES to implement DKIM, and they all match a pattern that includes the domain name. We can't use a simple macro. Instead, we use a function that takes the domain name as a parameter to generate the right records dynamically.