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[client] Flush macOS DNS cache after changes (#3185)

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Viktor Liu 2025-01-15 23:26:31 +01:00 committed by GitHub
parent 78795a4a73
commit 992a6c79b4
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1 changed files with 24 additions and 0 deletions
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24
client/internal/dns/host_darwin.go
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@ -28,6 +28,7 @@ const (
arraySymbol = "* "
digitSymbol = "# "
scutilPath = "/usr/sbin/scutil"
dscacheutilPath = "/usr/bin/dscacheutil"
searchSuffix = "Search"
matchSuffix = "Match"
localSuffix = "Local"
@ -106,6 +107,10 @@ func (s *systemConfigurator) applyDNSConfig(config HostDNSConfig, stateManager *
return fmt.Errorf("add search domains: %w", err)
}
if err := s.flushDNSCache(); err != nil {
log.Errorf("failed to flush DNS cache: %v", err)
}
return nil
}
@ -123,6 +128,10 @@ func (s *systemConfigurator) restoreHostDNS() error {
}
}
if err := s.flushDNSCache(); err != nil {
log.Errorf("failed to flush DNS cache: %v", err)
}
return nil
}
@ -316,6 +325,21 @@ func (s *systemConfigurator) getPrimaryService() (string, string, error) {
return primaryService, router, nil
}
func (s *systemConfigurator) flushDNSCache() error {
cmd := exec.Command(dscacheutilPath, "-flushcache")
if out, err := cmd.CombinedOutput(); err != nil {
return fmt.Errorf("flush DNS cache: %w, output: %s", err, out)
}
cmd = exec.Command("killall", "-HUP", "mDNSResponder")
if out, err := cmd.CombinedOutput(); err != nil {
return fmt.Errorf("restart mDNSResponder: %w, output: %s", err, out)
}
log.Info("flushed DNS cache")
return nil
}
func (s *systemConfigurator) restoreUncleanShutdownDNS() error {
if err := s.restoreHostDNS(); err != nil {
return fmt.Errorf("restoring dns via scutil: %w", err)