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config.go
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config.go
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package config
import (
"errors"
"fmt"
"io/ioutil"
"runtime"
"strings"
"sync"
"time"
yaml "gopkg.in/yaml.v2"
"github.com/prometheus/common/config"
)
type Config struct {
Modules map[string]Module `yaml:"modules"`
// Catches all undefined fields and must be empty after parsing.
XXX map[string]interface{} `yaml:",inline"`
}
type SafeConfig struct {
sync.RWMutex
C *Config
}
func (sc *SafeConfig) ReloadConfig(confFile string) (err error) {
var c = &Config{}
yamlFile, err := ioutil.ReadFile(confFile)
if err != nil {
return fmt.Errorf("Error reading config file: %s", err)
}
if err := yaml.Unmarshal(yamlFile, c); err != nil {
return fmt.Errorf("Error parsing config file: %s", err)
}
sc.Lock()
sc.C = c
sc.Unlock()
return nil
}
type Module struct {
Prober string `yaml:"prober,omitempty"`
Timeout time.Duration `yaml:"timeout,omitempty"`
HTTP HTTPProbe `yaml:"http,omitempty"`
TCP TCPProbe `yaml:"tcp,omitempty"`
ICMP ICMPProbe `yaml:"icmp,omitempty"`
DNS DNSProbe `yaml:"dns,omitempty"`
// Catches all undefined fields and must be empty after parsing.
XXX map[string]interface{} `yaml:",inline"`
}
type HTTPProbe struct {
// Defaults to 2xx.
ValidStatusCodes []int `yaml:"valid_status_codes,omitempty"`
ValidHTTPVersions []string `yaml:"valid_http_versions,omitempty"`
PreferredIPProtocol string `yaml:"preferred_ip_protocol,omitempty"`
NoFollowRedirects bool `yaml:"no_follow_redirects,omitempty"`
FailIfSSL bool `yaml:"fail_if_ssl,omitempty"`
FailIfNotSSL bool `yaml:"fail_if_not_ssl,omitempty"`
Method string `yaml:"method,omitempty"`
Headers map[string]string `yaml:"headers,omitempty"`
FailIfMatchesRegexp []string `yaml:"fail_if_matches_regexp,omitempty"`
FailIfNotMatchesRegexp []string `yaml:"fail_if_not_matches_regexp,omitempty"`
Body string `yaml:"body,omitempty"`
HTTPClientConfig config.HTTPClientConfig `yaml:"http_client_config,inline"`
// Catches all undefined fields and must be empty after parsing.
XXX map[string]interface{} `yaml:",inline"`
}
type QueryResponse struct {
Expect string `yaml:"expect,omitempty"`
Send string `yaml:"send,omitempty"`
StartTLS bool `yaml:"starttls,omitempty"`
// Catches all undefined fields and must be empty after parsing.
XXX map[string]interface{} `yaml:",inline"`
}
type TCPProbe struct {
PreferredIPProtocol string `yaml:"preferred_ip_protocol,omitempty"`
SourceIPAddress string `yaml:"source_ip_address,omitempty"`
QueryResponse []QueryResponse `yaml:"query_response,omitempty"`
TLS bool `yaml:"tls,omitempty"`
TLSConfig config.TLSConfig `yaml:"tls_config,omitempty"`
// Catches all undefined fields and must be empty after parsing.
XXX map[string]interface{} `yaml:",inline"`
}
type ICMPProbe struct {
PreferredIPProtocol string `yaml:"preferred_ip_protocol,omitempty"` // Defaults to "ip6".
SourceIPAddress string `yaml:"source_ip_address,omitempty"`
PayloadSize int `yaml:"payload_size,omitempty"`
DontFragment bool `yaml:"dont_fragment,omitempty"`
// Catches all undefined fields and must be empty after parsing.
XXX map[string]interface{} `yaml:",inline"`
}
type DNSProbe struct {
PreferredIPProtocol string `yaml:"preferred_ip_protocol,omitempty"`
SourceIPAddress string `yaml:"source_ip_address,omitempty"`
TransportProtocol string `yaml:"transport_protocol,omitempty"`
QueryName string `yaml:"query_name,omitempty"`
QueryType string `yaml:"query_type,omitempty"` // Defaults to ANY.
ValidRcodes []string `yaml:"valid_rcodes,omitempty"` // Defaults to NOERROR.
ValidateAnswer DNSRRValidator `yaml:"validate_answer_rrs,omitempty"`
ValidateAuthority DNSRRValidator `yaml:"validate_authority_rrs,omitempty"`
ValidateAdditional DNSRRValidator `yaml:"validate_additional_rrs,omitempty"`
// Catches all undefined fields and must be empty after parsing.
XXX map[string]interface{} `yaml:",inline"`
}
type DNSRRValidator struct {
FailIfMatchesRegexp []string `yaml:"fail_if_matches_regexp,omitempty"`
FailIfNotMatchesRegexp []string `yaml:"fail_if_not_matches_regexp,omitempty"`
// Catches all undefined fields and must be empty after parsing.
XXX map[string]interface{} `yaml:",inline"`
}
func checkOverflow(m map[string]interface{}, ctx string) error {
if len(m) > 0 {
var keys []string
for k := range m {
keys = append(keys, k)
}
return fmt.Errorf("unknown fields in %s: %s", ctx, strings.Join(keys, ", "))
}
return nil
}
// UnmarshalYAML implements the yaml.Unmarshaler interface.
func (s *Config) UnmarshalYAML(unmarshal func(interface{}) error) error {
type plain Config
if err := unmarshal((*plain)(s)); err != nil {
return err
}
if err := checkOverflow(s.XXX, "config"); err != nil {
return err
}
return nil
}
// UnmarshalYAML implements the yaml.Unmarshaler interface.
func (s *Module) UnmarshalYAML(unmarshal func(interface{}) error) error {
type plain Module
if err := unmarshal((*plain)(s)); err != nil {
return err
}
if err := checkOverflow(s.XXX, "module"); err != nil {
return err
}
return nil
}
// UnmarshalYAML implements the yaml.Unmarshaler interface.
func (s *HTTPProbe) UnmarshalYAML(unmarshal func(interface{}) error) error {
type plain HTTPProbe
if err := unmarshal((*plain)(s)); err != nil {
return err
}
if err := s.HTTPClientConfig.Validate(); err != nil {
return err
}
if err := checkOverflow(s.XXX, "http probe"); err != nil {
return err
}
return nil
}
// UnmarshalYAML implements the yaml.Unmarshaler interface.
func (s *DNSProbe) UnmarshalYAML(unmarshal func(interface{}) error) error {
type plain DNSProbe
if err := unmarshal((*plain)(s)); err != nil {
return err
}
if err := checkOverflow(s.XXX, "dns probe"); err != nil {
return err
}
if s.QueryName == "" {
return errors.New("Query name must be set for DNS module")
}
return nil
}
// UnmarshalYAML implements the yaml.Unmarshaler interface.
func (s *TCPProbe) UnmarshalYAML(unmarshal func(interface{}) error) error {
type plain TCPProbe
if err := unmarshal((*plain)(s)); err != nil {
return err
}
if err := checkOverflow(s.XXX, "tcp probe"); err != nil {
return err
}
return nil
}
// UnmarshalYAML implements the yaml.Unmarshaler interface.
func (s *DNSRRValidator) UnmarshalYAML(unmarshal func(interface{}) error) error {
type plain DNSRRValidator
if err := unmarshal((*plain)(s)); err != nil {
return err
}
if err := checkOverflow(s.XXX, "dns rr validator"); err != nil {
return err
}
return nil
}
// UnmarshalYAML implements the yaml.Unmarshaler interface.
func (s *ICMPProbe) UnmarshalYAML(unmarshal func(interface{}) error) error {
type plain ICMPProbe
if err := unmarshal((*plain)(s)); err != nil {
return err
}
if runtime.GOOS == "windows" && s.DontFragment {
return errors.New("\"dont_fragment\" is not supported on windows platforms")
}
if err := checkOverflow(s.XXX, "icmp probe"); err != nil {
return err
}
return nil
}
// UnmarshalYAML implements the yaml.Unmarshaler interface.
func (s *QueryResponse) UnmarshalYAML(unmarshal func(interface{}) error) error {
type plain QueryResponse
if err := unmarshal((*plain)(s)); err != nil {
return err
}
if err := checkOverflow(s.XXX, "query response"); err != nil {
return err
}
return nil
}