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https://github.com/open-policy-agent/opa.git
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Sebastian Spaink
40dd2b90d2
Follow-up to #8900. Moves the gzip encoding and decoding config validation off the Go `validateAndInjectDefaults` methods and onto embedded Rego policies, injecting defaults and reporting value errors. Each config registers its recognized options via `config.RegisterConfigSpec` so unknown-option warnings live with the owning struct. Field type validation stays in the Go decode step. --------- Signed-off-by: Sebastian Spaink <sebastianspaink@gmail.com>
82 lines
2.1 KiB
Go
82 lines
2.1 KiB
Go
package metrics
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import (
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"context"
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_ "embed"
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"github.com/open-policy-agent/opa/internal/configpolicy"
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"github.com/open-policy-agent/opa/v1/config"
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)
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var defaultHTTPRequestBuckets = []float64{
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1e-6, // 1 microsecond
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5e-6,
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1e-5,
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5e-5,
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1e-4,
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5e-4,
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1e-3, // 1 millisecond
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0.01,
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0.1,
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1, // 1 second
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}
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//go:embed validate.rego
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var validationModule string
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var validationPolicy = configpolicy.New(
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"opa/config/server/metrics/validate.rego",
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validationModule,
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"data.opa.config.server.metrics = x",
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)
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func init() {
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config.RegisterConfigSpec(config.SpecsFromStruct[Config]("server", "metrics")...)
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}
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// Config represents the configuration for the Server.Metrics settings
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type Config struct {
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Prom *Prom `json:"prom,omitempty"`
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}
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// Prom represents the configuration for the Server.Metrics.Prom settings
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type Prom struct {
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HTTPRequestDurationSeconds *HTTPRequestDurationSeconds `json:"http_request_duration_seconds,omitempty"`
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}
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// HTTPRequestDurationSeconds represents the configuration for the Server.Metrics.Prom.HTTPRequestDurationSeconds settings
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type HTTPRequestDurationSeconds struct {
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Buckets []float64 `json:"buckets,omitempty"` // the float64 array of buckets representing seconds or division of a second
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}
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// ConfigBuilder assists in the construction of the plugin configuration.
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type ConfigBuilder struct {
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raw []byte
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}
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// NewConfigBuilder returns a new ConfigBuilder to build and parse the server config
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func NewConfigBuilder() *ConfigBuilder {
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return &ConfigBuilder{}
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}
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// WithBytes sets the raw server config
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func (b *ConfigBuilder) WithBytes(config []byte) *ConfigBuilder {
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b.raw = config
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return b
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}
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// Parse returns a valid Config object with defaults injected.
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func (b *ConfigBuilder) Parse() (*Config, error) {
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return b.ParseWithContext(context.Background())
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}
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// ParseWithContext returns a valid Config object with defaults injected, using
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// ctx to evaluate the validation policy.
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func (b *ConfigBuilder) ParseWithContext(ctx context.Context) (*Config, error) {
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var result Config
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if _, err := configpolicy.EvalConfigInto(ctx, validationPolicy, b.raw, &result); err != nil {
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return nil, err
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}
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return &result, nil
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}
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