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Merge pull request #83069 from fcgravalos/remove_trailing_dots_from_searches

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remove trailing dots from the parsed searches from host resolv.conf
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Kubernetes Prow Robot 2019-10-07 11:27:11 -07:00 committed by GitHub
commit 39ba488be3
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2 changed files with 6 additions and 1 deletions
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6
pkg/kubelet/network/dns/dns.go
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@ -230,7 +230,11 @@ func parseResolvConf(reader io.Reader) (nameservers []string, searches []string,
} }
} }
if fields[0] == "search" { if fields[0] == "search" {
searches = fields[1:] // Normalise search fields so the same domain with and without trailing dot will only count once, to avoid hitting search validation limits.
searches = []string{}
for _, s := range fields[1:] {
searches = append(searches, strings.TrimSuffix(s, "."))
}
} }
if fields[0] == "options" { if fields[0] == "options" {
options = fields[1:] options = fields[1:]

1
pkg/kubelet/network/dns/dns_test.go
View File

@ -74,6 +74,7 @@ func TestParseResolvConf(t *testing.T) {
{"search ", []string{}, []string{}, []string{}, false}, // search empty {"search ", []string{}, []string{}, []string{}, false}, // search empty
{"search foo", []string{}, []string{"foo"}, []string{}, false}, {"search foo", []string{}, []string{"foo"}, []string{}, false},
{"search foo bar", []string{}, []string{"foo", "bar"}, []string{}, false}, {"search foo bar", []string{}, []string{"foo", "bar"}, []string{}, false},
{"search foo. bar", []string{}, []string{"foo", "bar"}, []string{}, false},
{"search foo bar bat\n", []string{}, []string{"foo", "bar", "bat"}, []string{}, false}, {"search foo bar bat\n", []string{}, []string{"foo", "bar", "bat"}, []string{}, false},
{"search foo\nsearch bar", []string{}, []string{"bar"}, []string{}, false}, {"search foo\nsearch bar", []string{}, []string{"bar"}, []string{}, false},
{"nameserver 1.2.3.4\nsearch foo bar", []string{"1.2.3.4"}, []string{"foo", "bar"}, []string{}, false}, {"nameserver 1.2.3.4\nsearch foo bar", []string{"1.2.3.4"}, []string{"foo", "bar"}, []string{}, false},