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Return NS records randomly

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Previously when the NS records were returned, ns-aws was always returned
first. Coincidentally, 64% of the queries were directed to ns-aws. And
once I exceeded AWS's 10 TB bandwidth limit, AWS began gouging me for
bandwidth charges, and $12.66/month rapidly climbed to $62.30

I'm hoping that by randomly rotating the order of nameservers, the
traffic will balance across the nameservers.

Current snapshot (already ns-ovh is helping):

ns-aws.sslip.io
"Queries: 237744377 (1800.6/s)"
"Answered Queries: 63040894 (477.5/s)"

ns-azure.sslip.io
"Queries: 42610823 (323.4/s)"
"Answered Queries: 14660603 (111.3/s)"

ns-gce.sslip.io
"Queries: 59734371 (454.1/s)"
"Answered Queries: 17636444 (134.1/s)"

ns-ovh.sslip.io
"Queries: 135897332 (1034.4/s)"
"Answered Queries: 36010164 (274.1/s)"
This commit is contained in:
Brian Cunnie
2024-09-16 17:39:35 -07:00
parent c4310ebb86
commit 63a2be439e
3 changed files with 16 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
integration_test.go
View File

@@ -268,10 +268,6 @@ var _ = Describe("sslip.io-dns-server", func() {
Expect(err).ToNot(HaveOccurred())
Eventually(digSession).Should(Say(`flags: qr aa rd; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 7`))
Eventually(digSession).Should(Say(`;; ANSWER SECTION:`))
Eventually(digSession).Should(Say(`ns-aws.sslip.io.\n`))
Eventually(digSession).Should(Say(`ns-azure.sslip.io.\n`))
Eventually(digSession).Should(Say(`ns-gce.sslip.io.\n`))
Eventually(digSession).Should(Say(`ns-ovh.sslip.io.\n`))
Eventually(digSession).Should(Say(`;; ADDITIONAL SECTION:`))
Eventually(digSession).Should(Say(`ns-aws.sslip.io..*52.0.56.137\n`))
Eventually(digSession).Should(Say(`ns-aws.sslip.io..*2600:1f18:aaf:6900::a\n`))
@@ -281,6 +277,11 @@ var _ = Describe("sslip.io-dns-server", func() {
Eventually(digSession).Should(Say(`ns-ovh.sslip.io..*51.75.53.19\n`))
Eventually(digSession).Should(Say(`ns-ovh.sslip.io..*2001:41d0:602:2313::1\n`))
Eventually(digSession, 1).Should(Exit(0))
// the server names may appear out-of-order
Eventually(string(digSession.Out.Contents())).Should(MatchRegexp(`NS\tns-aws.sslip.io.\n`))
Eventually(string(digSession.Out.Contents())).Should(MatchRegexp(`NS\tns-azure.sslip.io.\n`))
Eventually(string(digSession.Out.Contents())).Should(MatchRegexp(`NS\tns-gce.sslip.io.\n`))
Eventually(string(digSession.Out.Contents())).Should(MatchRegexp(`NS\tns-ovh.sslip.io.\n`))
Eventually(string(serverSession.Err.Contents())).Should(MatchRegexp(`TypeNS example.com. \? ns-aws.sslip.io., ns-azure.sslip.io., ns-gce.sslip.io., ns-ovh.sslip.io.\n`))
})
})
@@ -400,9 +401,10 @@ var _ = Describe("sslip.io-dns-server", func() {
"@localhost international-raiffeisen-bank.fc00--.sslip.io aaaa +short",
`\Afc00::\n\z`,
`TypeAAAA international-raiffeisen-bank.fc00--.sslip.io. \? fc00::\n$`),
// use regex to account for rotated nameserver order
Entry("an NS record with acme_challenge with a forbidden string is not delegated",
"@localhost _acme-challenge.raiffeisen.fe80--.sslip.io ns +short",
`\Ans-aws.sslip.io.\nns-azure.sslip.io.\nns-gce.sslip.io.\nns-ovh.sslip.io.\n\z`,
`\Ans-[a-z]+.sslip.io.\nns-[a-z]+.sslip.io.\nns-[a-z]+.sslip.io.\nns-[a-z]+.sslip.io.\n\z`,
`TypeNS _acme-challenge.raiffeisen.fe80--.sslip.io. \? ns-aws.sslip.io., ns-azure.sslip.io., ns-gce.sslip.io., ns-ovh.sslip.io.\n$`),
Entry("an A record with a forbidden CIDR is redirected",
"@localhost nf.43.134.66.67.sslip.io +short",