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config: simplify default config handling.

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This commit is contained in:
Fabian Reinartz 2015-06-04 17:03:12 +02:00
parent f344ecba59
commit 0af1cff8af
4 changed files with 110 additions and 143 deletions
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163
config/config.go
View file

@ -45,19 +45,19 @@ func LoadFromFile(filename string) (*Config, error) {
// The defaults applied before parsing the respective config sections.
var (
// The default top-level configuration.
DefaultConfig = DefaultedConfig{
GlobalConfig: &GlobalConfig{DefaultGlobalConfig},
DefaultConfig = Config{
GlobalConfig: &DefaultGlobalConfig,
}
// The default global configuration.
DefaultGlobalConfig = DefaultedGlobalConfig{
DefaultGlobalConfig = GlobalConfig{
ScrapeInterval: Duration(1 * time.Minute),
ScrapeTimeout: Duration(10 * time.Second),
EvaluationInterval: Duration(1 * time.Minute),
}
// Te default scrape configuration.
DefaultScrapeConfig = DefaultedScrapeConfig{
DefaultScrapeConfig = ScrapeConfig{
// ScrapeTimeout and ScrapeInterval default to the
// configured globals.
MetricsPath: "/metrics",
@ -65,23 +65,23 @@ var (
}
// The default Relabel configuration.
DefaultRelabelConfig = DefaultedRelabelConfig{
DefaultRelabelConfig = RelabelConfig{
Action: RelabelReplace,
Separator: ";",
}
// The default DNS SD configuration.
DefaultDNSSDConfig = DefaultedDNSSDConfig{
DefaultDNSSDConfig = DNSSDConfig{
RefreshInterval: Duration(30 * time.Second),
}
// The default file SD configuration.
DefaultFileSDConfig = DefaultedFileSDConfig{
DefaultFileSDConfig = FileSDConfig{
RefreshInterval: Duration(30 * time.Second),
}
// The default Consul SD configuration.
DefaultConsulSDConfig = DefaultedConsulSDConfig{
DefaultConsulSDConfig = ConsulSDConfig{
TagSeparator: ",",
Scheme: "http",
}
@ -89,8 +89,9 @@ var (
// Config is the top-level configuration for Prometheus's config files.
type Config struct {
// DefaultedConfig contains the actual fields of Config.
DefaultedConfig `yaml:",inline"`
GlobalConfig *GlobalConfig `yaml:"global"`
RuleFiles []string `yaml:"rule_files,omitempty"`
ScrapeConfigs []*ScrapeConfig `yaml:"scrape_configs,omitempty"`
// original is the input from which the config was parsed.
original string
@ -109,8 +110,12 @@ func (c Config) String() string {
// UnmarshalYAML implements the yaml.Unmarshaler interface.
func (c *Config) UnmarshalYAML(unmarshal func(interface{}) error) error {
c.DefaultedConfig = DefaultConfig
if err := unmarshal(&c.DefaultedConfig); err != nil {
*c = DefaultConfig
// We want to set c to the defaults and then overwrite it with the input.
// To make unmarshal fill the plain data struct rather than calling UnmarshalYAML
// again, we have to hide it using a type indirection.
type plain Config
if err := unmarshal((*plain)(c)); err != nil {
return err
}
for _, rf := range c.RuleFiles {
@ -136,31 +141,9 @@ func (c *Config) UnmarshalYAML(unmarshal func(interface{}) error) error {
return nil
}
// DefaultedConfig is a proxy type for Config.
type DefaultedConfig struct {
GlobalConfig *GlobalConfig `yaml:"global"`
RuleFiles []string `yaml:"rule_files,omitempty"`
ScrapeConfigs []*ScrapeConfig `yaml:"scrape_configs,omitempty"`
}
// GlobalConfig configures values that are used across other configuration
// objects.
type GlobalConfig struct {
// DefaultedGlobalConfig contains the actual fields for GlobalConfig.
DefaultedGlobalConfig `yaml:",inline"`
}
// UnmarshalYAML implements the yaml.Unmarshaler interface.
func (c *GlobalConfig) UnmarshalYAML(unmarshal func(interface{}) error) error {
c.DefaultedGlobalConfig = DefaultGlobalConfig
if err := unmarshal(&c.DefaultedGlobalConfig); err != nil {
return err
}
return nil
}
// DefaultedGlobalConfig is a proxy type for GlobalConfig.
type DefaultedGlobalConfig struct {
// How frequently to scrape targets by default.
ScrapeInterval Duration `yaml:"scrape_interval,omitempty"`
// The default timeout when scraping targets.
@ -172,27 +155,18 @@ type DefaultedGlobalConfig struct {
Labels clientmodel.LabelSet `yaml:"labels,omitempty"`
}
// ScrapeConfig configures a scraping unit for Prometheus.
type ScrapeConfig struct {
// DefaultedScrapeConfig contains the actual fields for ScrapeConfig.
DefaultedScrapeConfig `yaml:",inline"`
}
// UnmarshalYAML implements the yaml.Unmarshaler interface.
func (c *ScrapeConfig) UnmarshalYAML(unmarshal func(interface{}) error) error {
c.DefaultedScrapeConfig = DefaultScrapeConfig
err := unmarshal(&c.DefaultedScrapeConfig)
if err != nil {
func (c *GlobalConfig) UnmarshalYAML(unmarshal func(interface{}) error) error {
*c = DefaultGlobalConfig
type plain GlobalConfig
if err := unmarshal((*plain)(c)); err != nil {
return err
}
if !patJobName.MatchString(c.JobName) {
return fmt.Errorf("%q is not a valid job name", c.JobName)
}
return nil
}
// DefaultedScrapeConfig is a proxy type for ScrapeConfig.
type DefaultedScrapeConfig struct {
// ScrapeConfig configures a scraping unit for Prometheus.
type ScrapeConfig struct {
// The job name to which the job label is set by default.
JobName string `yaml:"job_name"`
// How frequently to scrape the targets of this scrape config.
@ -218,6 +192,20 @@ type DefaultedScrapeConfig struct {
RelabelConfigs []*RelabelConfig `yaml:"relabel_configs,omitempty"`
}
// UnmarshalYAML implements the yaml.Unmarshaler interface.
func (c *ScrapeConfig) UnmarshalYAML(unmarshal func(interface{}) error) error {
*c = DefaultScrapeConfig
type plain ScrapeConfig
err := unmarshal((*plain)(c))
if err != nil {
return err
}
if !patJobName.MatchString(c.JobName) {
return fmt.Errorf("%q is not a valid job name", c.JobName)
}
return nil
}
// BasicAuth contains basic HTTP authentication credentials.
type BasicAuth struct {
Username string `yaml:"username"`
@ -301,14 +289,15 @@ func (tg *TargetGroup) UnmarshalJSON(b []byte) error {
// DNSSDConfig is the configuration for DNS based service discovery.
type DNSSDConfig struct {
// DefaultedDNSSDConfig contains the actual fields for DNSSDConfig.
DefaultedDNSSDConfig `yaml:",inline"`
Names []string `yaml:"names"`
RefreshInterval Duration `yaml:"refresh_interval,omitempty"`
}
// UnmarshalYAML implements the yaml.Unmarshaler interface.
func (c *DNSSDConfig) UnmarshalYAML(unmarshal func(interface{}) error) error {
c.DefaultedDNSSDConfig = DefaultDNSSDConfig
err := unmarshal(&c.DefaultedDNSSDConfig)
*c = DefaultDNSSDConfig
type plain DNSSDConfig
err := unmarshal((*plain)(c))
if err != nil {
return err
}
@ -318,22 +307,17 @@ func (c *DNSSDConfig) UnmarshalYAML(unmarshal func(interface{}) error) error {
return nil
}
// DefaultedDNSSDConfig is a proxy type for DNSSDConfig.
type DefaultedDNSSDConfig struct {
// FileSDConfig is the configuration for file based discovery.
type FileSDConfig struct {
Names []string `yaml:"names"`
RefreshInterval Duration `yaml:"refresh_interval,omitempty"`
}
// FileSDConfig is the configuration for file based discovery.
type FileSDConfig struct {
// DefaultedFileSDConfig contains the actual fields for FileSDConfig.
DefaultedFileSDConfig `yaml:",inline"`
}
// UnmarshalYAML implements the yaml.Unmarshaler interface.
func (c *FileSDConfig) UnmarshalYAML(unmarshal func(interface{}) error) error {
c.DefaultedFileSDConfig = DefaultFileSDConfig
err := unmarshal(&c.DefaultedFileSDConfig)
*c = DefaultFileSDConfig
type plain FileSDConfig
err := unmarshal((*plain)(c))
if err != nil {
return err
}
@ -348,22 +332,24 @@ func (c *FileSDConfig) UnmarshalYAML(unmarshal func(interface{}) error) error {
return nil
}
// DefaultedFileSDConfig is a proxy type for FileSDConfig.
type DefaultedFileSDConfig struct {
Names []string `yaml:"names"`
RefreshInterval Duration `yaml:"refresh_interval,omitempty"`
}
// ConsulSDConfig is the configuration for Consul service discovery.
type ConsulSDConfig struct {
// DefaultedConsulSDConfig contains the actual fields for ConsulSDConfig.
DefaultedConsulSDConfig `yaml:",inline"`
Server string `yaml:"server"`
Token string `yaml:"token"`
Datacenter string `yaml:"datacenter"`
TagSeparator string `yaml:"tag_separator"`
Scheme string `yaml:"scheme"`
Username string `yaml:"username"`
Password string `yaml:"password"`
// The list of services for which targets are discovered.
Services []string `yaml:"services"`
}
// UnmarshalYAML implements the yaml.Unmarshaler interface.
func (c *ConsulSDConfig) UnmarshalYAML(unmarshal func(interface{}) error) error {
c.DefaultedConsulSDConfig = DefaultConsulSDConfig
err := unmarshal(&c.DefaultedConsulSDConfig)
*c = DefaultConsulSDConfig
type plain ConsulSDConfig
err := unmarshal((*plain)(c))
if err != nil {
return err
}
@ -376,18 +362,6 @@ func (c *ConsulSDConfig) UnmarshalYAML(unmarshal func(interface{}) error) error
return nil
}
// DefaultedConsulSDConfig is a proxy type for ConsulSDConfig.
type DefaultedConsulSDConfig struct {
Server string `yaml:"server"`
Token string `yaml:"token"`
Datacenter string `yaml:"datacenter"`
TagSeparator string `yaml:"tag_separator"`
Scheme string `yaml:"scheme"`
Username string `yaml:"username"`
Password string `yaml:"password"`
Services []string `yaml:"services"`
}
// RelabelAction is the action to be performed on relabeling.
type RelabelAction string
@ -416,18 +390,6 @@ func (a *RelabelAction) UnmarshalYAML(unmarshal func(interface{}) error) error {
// RelabelConfig is the configuration for relabeling of target label sets.
type RelabelConfig struct {
// DefaultedRelabelConfig contains the actual fields for RelabelConfig.
DefaultedRelabelConfig `yaml:",inline"`
}
// UnmarshalYAML implements the yaml.Unmarshaler interface.
func (c *RelabelConfig) UnmarshalYAML(unmarshal func(interface{}) error) error {
c.DefaultedRelabelConfig = DefaultRelabelConfig
return unmarshal(&c.DefaultedRelabelConfig)
}
// DefaultedRelabelConfig is a proxy type for RelabelConfig.
type DefaultedRelabelConfig struct {
// A list of labels from which values are taken and concatenated
// with the configured separator in order.
SourceLabels clientmodel.LabelNames `yaml:"source_labels,flow"`
@ -443,6 +405,13 @@ type DefaultedRelabelConfig struct {
Action RelabelAction `yaml:"action,omitempty"`
}
// UnmarshalYAML implements the yaml.Unmarshaler interface.
func (c *RelabelConfig) UnmarshalYAML(unmarshal func(interface{}) error) error {
*c = DefaultRelabelConfig
type plain RelabelConfig
return unmarshal((*plain)(c))
}
// Regexp encapsulates a regexp.Regexp and makes it YAML marshallable.
type Regexp struct {
regexp.Regexp

41
config/config_test.go
View file

@ -12,8 +12,8 @@ import (
clientmodel "github.com/prometheus/client_golang/model"
)
var expectedConf = &Config{DefaultedConfig{
GlobalConfig: &GlobalConfig{DefaultedGlobalConfig{
var expectedConf = &Config{
GlobalConfig: &GlobalConfig{
ScrapeInterval: Duration(15 * time.Second),
ScrapeTimeout: DefaultGlobalConfig.ScrapeTimeout,
EvaluationInterval: Duration(30 * time.Second),
@ -22,7 +22,7 @@ var expectedConf = &Config{DefaultedConfig{
"monitor": "codelab",
"foo": "bar",
},
}},
},
RuleFiles: []string{
"first.rules",
@ -31,7 +31,7 @@ var expectedConf = &Config{DefaultedConfig{
},
ScrapeConfigs: []*ScrapeConfig{
{DefaultedScrapeConfig{
{
JobName: "prometheus",
ScrapeInterval: Duration(15 * time.Second),
@ -54,28 +54,28 @@ var expectedConf = &Config{DefaultedConfig{
},
FileSDConfigs: []*FileSDConfig{
{DefaultedFileSDConfig{
{
Names: []string{"foo/*.slow.json", "foo/*.slow.yml", "single/file.yml"},
RefreshInterval: Duration(10 * time.Minute),
}},
{DefaultedFileSDConfig{
},
{
Names: []string{"bar/*.yaml"},
RefreshInterval: Duration(30 * time.Second),
}},
},
},
RelabelConfigs: []*RelabelConfig{
{DefaultedRelabelConfig{
{
SourceLabels: clientmodel.LabelNames{"job", "__meta_dns_srv_name"},
TargetLabel: "job",
Separator: ";",
Regex: &Regexp{*regexp.MustCompile("(.*)some-[regex]$")},
Replacement: "foo-${1}",
Action: RelabelReplace,
}},
},
}},
{DefaultedScrapeConfig{
},
},
{
JobName: "service-x",
ScrapeInterval: Duration(50 * time.Second),
@ -89,32 +89,33 @@ var expectedConf = &Config{DefaultedConfig{
Scheme: "https",
DNSSDConfigs: []*DNSSDConfig{
{DefaultedDNSSDConfig{
{
Names: []string{
"first.dns.address.domain.com",
"second.dns.address.domain.com",
},
RefreshInterval: Duration(15 * time.Second),
}},
{DefaultedDNSSDConfig{
},
{
Names: []string{
"first.dns.address.domain.com",
},
RefreshInterval: Duration(30 * time.Second),
}},
},
},
RelabelConfigs: []*RelabelConfig{
{DefaultedRelabelConfig{
{
SourceLabels: clientmodel.LabelNames{"job"},
Regex: &Regexp{*regexp.MustCompile("(.*)some-[regex]$")},
Separator: ";",
Action: RelabelDrop,
}},
},
}},
},
}, ""}
},
},
original: "",
}
func TestLoadConfig(t *testing.T) {
c, err := LoadFromFile("testdata/conf.good.yml")

22
retrieval/relabel_test.go
View file

@ -13,7 +13,7 @@ import (
func TestRelabel(t *testing.T) {
tests := []struct {
input clientmodel.LabelSet
relabel []config.DefaultedRelabelConfig
relabel []*config.RelabelConfig
output clientmodel.LabelSet
}{
{
@ -22,7 +22,7 @@ func TestRelabel(t *testing.T) {
"b": "bar",
"c": "baz",
},
relabel: []config.DefaultedRelabelConfig{
relabel: []*config.RelabelConfig{
{
SourceLabels: clientmodel.LabelNames{"a"},
Regex: &config.Regexp{*regexp.MustCompile("f(.*)")},
@ -45,7 +45,7 @@ func TestRelabel(t *testing.T) {
"b": "bar",
"c": "baz",
},
relabel: []config.DefaultedRelabelConfig{
relabel: []*config.RelabelConfig{
{
SourceLabels: clientmodel.LabelNames{"a", "b"},
Regex: &config.Regexp{*regexp.MustCompile("^f(.*);(.*)r$")},
@ -74,7 +74,7 @@ func TestRelabel(t *testing.T) {
input: clientmodel.LabelSet{
"a": "foo",
},
relabel: []config.DefaultedRelabelConfig{
relabel: []*config.RelabelConfig{
{
SourceLabels: clientmodel.LabelNames{"a"},
Regex: &config.Regexp{*regexp.MustCompile("o$")},
@ -94,7 +94,7 @@ func TestRelabel(t *testing.T) {
input: clientmodel.LabelSet{
"a": "foo",
},
relabel: []config.DefaultedRelabelConfig{
relabel: []*config.RelabelConfig{
{
SourceLabels: clientmodel.LabelNames{"a"},
Regex: &config.Regexp{*regexp.MustCompile("no-match")},
@ -109,7 +109,7 @@ func TestRelabel(t *testing.T) {
input: clientmodel.LabelSet{
"a": "foo",
},
relabel: []config.DefaultedRelabelConfig{
relabel: []*config.RelabelConfig{
{
SourceLabels: clientmodel.LabelNames{"a"},
Regex: &config.Regexp{*regexp.MustCompile("no-match")},
@ -122,7 +122,7 @@ func TestRelabel(t *testing.T) {
input: clientmodel.LabelSet{
"a": "foo",
},
relabel: []config.DefaultedRelabelConfig{
relabel: []*config.RelabelConfig{
{
SourceLabels: clientmodel.LabelNames{"a"},
Regex: &config.Regexp{*regexp.MustCompile("^f")},
@ -138,7 +138,7 @@ func TestRelabel(t *testing.T) {
input: clientmodel.LabelSet{
"a": "boo",
},
relabel: []config.DefaultedRelabelConfig{
relabel: []*config.RelabelConfig{
{
SourceLabels: clientmodel.LabelNames{"a"},
Regex: &config.Regexp{*regexp.MustCompile("^f")},
@ -154,11 +154,7 @@ func TestRelabel(t *testing.T) {
}
for i, test := range tests {
var relabel []*config.RelabelConfig
for _, rl := range test.relabel {
relabel = append(relabel, &config.RelabelConfig{rl})
}
res, err := Relabel(test.input, relabel...)
res, err := Relabel(test.input, test.relabel...)
if err != nil {
t.Errorf("Test %d: error relabeling: %s", i+1, err)
}

27
retrieval/targetmanager_test.go
View file

@ -25,7 +25,7 @@ import (
)
func TestTargetManagerChan(t *testing.T) {
testJob1 := &config.ScrapeConfig{config.DefaultedScrapeConfig{
testJob1 := &config.ScrapeConfig{
JobName: "test_job1",
ScrapeInterval: config.Duration(1 * time.Minute),
TargetGroups: []*config.TargetGroup{{
@ -34,7 +34,7 @@ func TestTargetManagerChan(t *testing.T) {
{clientmodel.AddressLabel: "example.com:80"},
},
}},
}}
}
prov1 := &fakeTargetProvider{
sources: []string{"src1", "src2"},
update: make(chan *config.TargetGroup),
@ -154,7 +154,7 @@ func TestTargetManagerChan(t *testing.T) {
}
func TestTargetManagerConfigUpdate(t *testing.T) {
testJob1 := &config.ScrapeConfig{config.DefaultedScrapeConfig{
testJob1 := &config.ScrapeConfig{
JobName: "test_job1",
ScrapeInterval: config.Duration(1 * time.Minute),
TargetGroups: []*config.TargetGroup{{
@ -163,8 +163,8 @@ func TestTargetManagerConfigUpdate(t *testing.T) {
{clientmodel.AddressLabel: "example.com:80"},
},
}},
}}
testJob2 := &config.ScrapeConfig{config.DefaultedScrapeConfig{
}
testJob2 := &config.ScrapeConfig{
JobName: "test_job2",
ScrapeInterval: config.Duration(1 * time.Minute),
TargetGroups: []*config.TargetGroup{
@ -191,14 +191,14 @@ func TestTargetManagerConfigUpdate(t *testing.T) {
},
},
RelabelConfigs: []*config.RelabelConfig{
{config.DefaultedRelabelConfig{
{
SourceLabels: clientmodel.LabelNames{clientmodel.AddressLabel},
Regex: &config.Regexp{*regexp.MustCompile(`^test\.(.*?):(.*)`)},
Replacement: "foo.${1}:${2}",
TargetLabel: clientmodel.AddressLabel,
Action: config.RelabelReplace,
}},
{config.DefaultedRelabelConfig{
},
{
// Add a new label for example.* targets.
SourceLabels: clientmodel.LabelNames{clientmodel.AddressLabel, "boom", "foo"},
Regex: &config.Regexp{*regexp.MustCompile("^example.*?-b([a-z-]+)r$")},
@ -206,17 +206,17 @@ func TestTargetManagerConfigUpdate(t *testing.T) {
Replacement: "$1",
Separator: "-",
Action: config.RelabelReplace,
}},
{config.DefaultedRelabelConfig{
},
{
// Drop an existing label.
SourceLabels: clientmodel.LabelNames{"boom"},
Regex: &config.Regexp{*regexp.MustCompile(".*")},
TargetLabel: "boom",
Replacement: "",
Action: config.RelabelReplace,
}},
},
}}
},
}
sequence := []struct {
scrapeConfigs []*config.ScrapeConfig
@ -275,7 +275,8 @@ func TestTargetManagerConfigUpdate(t *testing.T) {
},
},
}
conf := &config.Config{DefaultedConfig: config.DefaultConfig}
conf := &config.Config{}
*conf = config.DefaultConfig
targetManager := NewTargetManager(nopAppender{})
targetManager.ApplyConfig(conf)