Packetbeat: DNS processor configuration parsing error

[dddpaul]

Hi.

• Version: master, 7.x, after Adds a default for failure_cache.min_ttl #21085
• Operating System: Linux, Macos
• Discuss Forum URL: https://discuss.elastic.co/t/fail-to-unpack-the-dns-configuration-requires-duration-1-accessing-processors-0-dns-min-ttl/248453/
• Steps to Reproduce:

For example, given configuration:

processors:
  - dns:
      type: reverse
      success_cache:
        min_ttl: 2000m

Results with default SuccessCache MinTTL (1m):

DEBUG	[processor.dns]	dns/dns.go:67	DNS processor config: {CacheConfig:{SuccessCache:{TTL:0s MinTTL:1m0s InitialCapacity:1000 MaxCapacity:10000} FailureCache:{TTL:1m0s MinTTL:1m0s InitialCapacity:1000 MaxCapacity:10000}} Nameservers:[] Timeout:500ms Type:reverse Action:append TagOnFailure:[] Fields:null Transport:udp reverseFlat:map[]}	{"instance_id": 1}

The point is that this piece of code (see

beats/libbeat/processors/dns/config.go

Line 31 in bf3eace

type Config struct {

):

// Config defines the configuration options for the DNS processor.
type Config struct {
	CacheConfig
	Nameservers  []string      `config:"nameservers"`
	...
}

// CacheConfig defines the success and failure caching parameters.
type CacheConfig struct {
	SuccessCache CacheSettings `config:"success_cache"`
	FailureCache CacheSettings `config:"failure_cache"`
}

should work like:

// Config defines the configuration options for the DNS processor.
type Config struct {
	SuccessCache CacheSettings `config:"success_cache"`
	FailureCache CacheSettings `config:"failure_cache"`
	Nameservers  []string      `config:"nameservers"`
	...
}

But it doesn't.

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