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dnsmigrator

PowerDNS Authoritative Vultr DNS

Migrate DNS from PowerDNS to Vultr.

9 record types move as they are. 3 things work differently at Vultr, and the preview shows exactly which of your records they affect.

Free preview. Read-only. Nothing changes until you apply.

What works differently

Generated from the same provider capability data the migration engine uses.

Moves as-is

  • A
  • AAAA
  • CNAME
  • MX
  • TXT
  • NS
  • SRV
  • CAA
  • SSHFP

Alias records are converted

PowerDNS alias records become CNAMEs below the apex. At the apex they need static addresses, and the preview shows which ones.

TTLs below 60s are raised

Vultr's minimum TTL is 60 seconds. Shorter TTLs are raised to 60s and shown as translated.

A typical PowerDNS zone at Vultr

Example records for example.com. Open any flagged row to read why it changed.

PowerDNS Vultr

  • ExactA@

    192.0.2.70

  • ExactAAAA@

    2001:db8::70

  • ExactMX@

    10 mx1.mail.example.net. +1

  • ExactTXT@

    "v=spf1 include:_spf.example.net -all"

  • ExactCAA@

    0 issue "letsencrypt.org"

  • ExactTXT_dmarc

    "v=DMARC1; p=reject; rua=mailto:dmarc@example.com"

  • ExactSRV_sip._tls

    100 1 443 sip.example.net.

  • ExactCNAMEwww

    example.com.

How the move works

  1. 1

    Connect PowerDNS

    Connect PowerDNS with read-only access (API URL + API key (X-API-Key) + server ID).

  2. 2

    Connect Vultr

    Connect Vultr (API key (personal access token)). Write access is only used when you apply.

  3. 3

    Review the preview

    Check every record marked Review or Unsupported. Each one explains what changes and why.

  4. 4

    Apply to Vultr

    We snapshot the Vultr zone, write in batches, and leave PowerDNS untouched.

  5. 5

    Verify

    We query Vultr's own nameservers for every record and compare the answers before you switch.

  6. 6

    Switch nameservers

    Lower TTLs a day or two ahead, remove any DS record if DNSSEC is on, then point the domain at the new nameservers at your registrar.

Good to know about PowerDNS

  • We only connect to public HTTPS addresses: expose the PowerDNS webserver through a reverse proxy with TLS and allow-list our egress IPs; private or internal addresses are refused.
  • ALIAS records only resolve if expand-alias and a resolver are configured on the server, and DNAME needs dname-processing.
  • Disabled records are not imported, and an RRset we update is replaced as a whole, so disabled entries inside it are dropped.

Access we need: The PowerDNS API key grants full read/write access to every zone on the server; there is no read-only key. Restrict it with webserver-allow-from.

Good to know about Vultr

  • Vultr API keys can't be limited to read-only, so use a dedicated user that only has the Manage DNS permission.
  • If API Access Control is enabled, requests from IP addresses that aren't on the allow-list are rejected.
  • TXT values can't contain double quotes.

Access we need: A user with the Manage DNS permission for both preview and apply. Vultr keys have no read-only mode.

Questions

Will there be downtime moving from PowerDNS to Vultr?

Not if both providers serve the same answers during the switch. The records are copied to Vultr and verified before you change nameservers, so resolvers get the same answer from either side while caches expire.

Do I have to delete anything at PowerDNS?

No. We never write to PowerDNS. Keep the old zone for a week after cutover so you can switch back instantly if anything looks wrong.

What about DNSSEC?

If DNSSEC is on, remove the DS record at your registrar and wait for it to expire before switching nameservers. Then enable DNSSEC at Vultr and publish its new DS record. The cutover plan walks you through each step.

Related migrations

Ready to see your own zone?

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