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plugin/loadbalance: More consistent shuffling (#4961)

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* fix shuffling

Signed-off-by: Chris O'Haver <cohaver@infoblox.com>

* shuffle each record once

Signed-off-by: Chris O'Haver <cohaver@infoblox.com>
This commit is contained in:
Chris O'Haver
2021-11-12 11:00:20 -05:00
committed by GitHub
parent f6ffafe229
commit 29cae57932
1 changed files with 5 additions and 6 deletions
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11
plugin/loadbalance/loadbalance.go
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@@ -61,13 +61,12 @@ func roundRobinShuffle(records []dns.RR) {
records[0], records[1] = records[1], records[0] records[0], records[1] = records[1], records[0]
} }
default: default:
for j := 0; j < l*(int(dns.Id())%4+1); j++ { for j := 0; j < l; j++ {
q := int(dns.Id()) % l p := j + (int(dns.Id()) % (l-j))
p := int(dns.Id()) % l if j == p {
if q == p { continue
p = (p + 1) % l
} }
records[q], records[p] = records[p], records[q] records[j], records[p] = records[p], records[j]
} }
} }
} }