// DecodeCheckDefinition is used to decode a check definition
func DecodeCheckDefinition(raw interface{}) (*CheckDefinition, error) {
if err := FixupCheckType(raw); err != nil {
return nil, err
}
var md mapstructure.Metadata
var result CheckDefinition
msdec, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
Metadata: &md,
Result: &result,
})
if err != nil {
return nil, err
}
if err := msdec.Decode(raw); err != nil {
return nil, err
}
return &result, nil
}
// DecodeServiceDefinition is used to decode a service definition
func DecodeServiceDefinition(raw interface{}) (*ServiceDefinition, error) {
var sub interface{}
rawMap, ok := raw.(map[string]interface{})
if !ok {
goto AFTER_FIX
}
// If no 'tags', handle the deprecated 'tag' value.
if _, ok := rawMap["tags"]; !ok {
if tag, ok := rawMap["tag"]; ok {
rawMap["tags"] = []interface{}{tag}
}
}
for k, v := range rawMap {
if strings.ToLower(k) == "check" {
sub = v
break
}
}
if sub == nil {
goto AFTER_FIX
}
if err := FixupCheckType(sub); err != nil {
return nil, err
}
AFTER_FIX:
var md mapstructure.Metadata
var result ServiceDefinition
msdec, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
Metadata: &md,
Result: &result,
})
if err != nil {
return nil, err
}
if err := msdec.Decode(raw); err != nil {
return nil, err
}
return &result, nil
}
// DecodeConfig reads the configuration from the given reader in JSON
// format and decodes it into a proper Config structure.
func DecodeConfig(r io.Reader) (*Config, error) {
var raw interface{}
var result Config
dec := json.NewDecoder(r)
if err := dec.Decode(&raw); err != nil {
return nil, err
}
// Check the result type
if obj, ok := raw.(map[string]interface{}); ok {
// Check for a "services", "service" or "check" key, meaning
// this is actually a definition entry
if sub, ok := obj["services"]; ok {
if list, ok := sub.([]interface{}); ok {
for _, srv := range list {
service, err := DecodeServiceDefinition(srv)
if err != nil {
return nil, err
}
result.Services = append(result.Services, service)
}
}
}
if sub, ok := obj["service"]; ok {
service, err := DecodeServiceDefinition(sub)
if err != nil {
return nil, err
}
result.Services = append(result.Services, service)
}
if sub, ok := obj["checks"]; ok {
if list, ok := sub.([]interface{}); ok {
for _, chk := range list {
check, err := DecodeCheckDefinition(chk)
if err != nil {
return nil, err
}
result.Checks = append(result.Checks, check)
}
}
}
if sub, ok := obj["check"]; ok {
check, err := DecodeCheckDefinition(sub)
if err != nil {
return nil, err
}
result.Checks = append(result.Checks, check)
}
}
// Decode
var md mapstructure.Metadata
msdec, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
Metadata: &md,
Result: &result,
})
if err != nil {
return nil, err
}
if err := msdec.Decode(raw); err != nil {
return nil, err
}
// Check unused fields and verify that no bad configuration options were
// passed to Consul. There are a few additional fields which don't directly
// use mapstructure decoding, so we need to account for those as well.
allowedKeys := []string{"service", "services", "check", "checks"}
var unused []string
for _, field := range md.Unused {
if !strContains(allowedKeys, field) {
unused = append(unused, field)
}
}
if len(unused) > 0 {
return nil, fmt.Errorf("Config has invalid keys: %s", strings.Join(unused, ","))
}
// Handle time conversions
if raw := result.DNSConfig.NodeTTLRaw; raw != "" {
dur, err := time.ParseDuration(raw)
if err != nil {
return nil, fmt.Errorf("NodeTTL invalid: %v", err)
}
result.DNSConfig.NodeTTL = dur
}
if raw := result.DNSConfig.MaxStaleRaw; raw != "" {
dur, err := time.ParseDuration(raw)
if err != nil {
return nil, fmt.Errorf("MaxStale invalid: %v", err)
}
result.DNSConfig.MaxStale = dur
}
if len(result.DNSConfig.ServiceTTLRaw) != 0 {
if result.DNSConfig.ServiceTTL == nil {
result.DNSConfig.ServiceTTL = make(map[string]time.Duration)
}
for service, raw := range result.DNSConfig.ServiceTTLRaw {
dur, err := time.ParseDuration(raw)
if err != nil {
return nil, fmt.Errorf("ServiceTTL %s invalid: %v", service, err)
}
result.DNSConfig.ServiceTTL[service] = dur
}
}
if raw := result.CheckUpdateIntervalRaw; raw != "" {
dur, err := time.ParseDuration(raw)
if err != nil {
return nil, fmt.Errorf("CheckUpdateInterval invalid: %v", err)
}
result.CheckUpdateInterval = dur
}
if raw := result.ACLTTLRaw; raw != "" {
dur, err := time.ParseDuration(raw)
if err != nil {
return nil, fmt.Errorf("ACL TTL invalid: %v", err)
}
result.ACLTTL = dur
}
if raw := result.RetryIntervalRaw; raw != "" {
dur, err := time.ParseDuration(raw)
if err != nil {
return nil, fmt.Errorf("RetryInterval invalid: %v", err)
}
result.RetryInterval = dur
}
if raw := result.RetryIntervalWanRaw; raw != "" {
dur, err := time.ParseDuration(raw)
if err != nil {
return nil, fmt.Errorf("RetryIntervalWan invalid: %v", err)
}
result.RetryIntervalWan = dur
}
// Merge the single recursor
if result.DNSRecursor != "" {
result.DNSRecursors = append(result.DNSRecursors, result.DNSRecursor)
}
return &result, nil
}