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Improve missing dns servers module error

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Daniel 2020-11-04 14:49:57 +01:00
parent a0268ee91d
commit 30f84e8009
1 changed files with 8 additions and 4 deletions
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12
resolver/resolvers.go
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@ -204,28 +204,32 @@ func getSystemResolvers() (resolvers []*Resolver) {
return resolvers
}
const missingResolversErrorID = "missing-resolvers"
func loadResolvers() {
// TODO: what happens when a lot of processes want to reload at once? we do not need to run this multiple times in a short time frame.
resolversLock.Lock()
defer resolversLock.Unlock()
// Resolve module error about missing resolvers.
module.Resolve(missingResolversErrorID)
newResolvers := append(
getConfiguredResolvers(configuredNameServers()),
getSystemResolvers()...,
)
if len(newResolvers) == 0 {
msg := "no (valid) dns servers found in (user) configuration or system, falling back to defaults"
msg := "no (valid) dns servers found in configuration or system, falling back to defaults"
log.Warningf("resolver: %s", msg)
module.Warning("no-valid-user-resolvers", msg)
module.Warning(missingResolversErrorID, msg)
// load defaults directly, overriding config system
newResolvers = getConfiguredResolvers(defaultNameServers)
if len(newResolvers) == 0 {
msg = "no (valid) dns servers found in configuration or system"
log.Criticalf("resolver: %s", msg)
module.Error("no-valid-default-resolvers", msg)
return
module.Error(missingResolversErrorID, msg)
}
}