104 lines
2.1 KiB
Go
104 lines
2.1 KiB
Go
package balanced
|
|
|
|
import (
|
|
"encoding/json"
|
|
"errors"
|
|
|
|
"github.com/ipfs-cluster/ipfs-cluster/config"
|
|
"github.com/kelseyhightower/envconfig"
|
|
)
|
|
|
|
const configKey = "balanced"
|
|
const envConfigKey = "cluster_balanced"
|
|
|
|
// These are the default values for a Config.
|
|
var (
|
|
DefaultAllocateBy = []string{"tag:group", "freespace"}
|
|
)
|
|
|
|
// Config allows to initialize the Allocator.
|
|
type Config struct {
|
|
config.Saver
|
|
|
|
AllocateBy []string
|
|
}
|
|
|
|
type jsonConfig struct {
|
|
AllocateBy []string `json:"allocate_by"`
|
|
}
|
|
|
|
// ConfigKey returns a human-friendly identifier for this
|
|
// Config's type.
|
|
func (cfg *Config) ConfigKey() string {
|
|
return configKey
|
|
}
|
|
|
|
// Default initializes this Config with sensible values.
|
|
func (cfg *Config) Default() error {
|
|
cfg.AllocateBy = DefaultAllocateBy
|
|
return nil
|
|
}
|
|
|
|
// ApplyEnvVars fills in any Config fields found
|
|
// as environment variables.
|
|
func (cfg *Config) ApplyEnvVars() error {
|
|
jcfg := cfg.toJSONConfig()
|
|
|
|
err := envconfig.Process(envConfigKey, jcfg)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return cfg.applyJSONConfig(jcfg)
|
|
}
|
|
|
|
// Validate checks that the fields of this configuration have
|
|
// sensible values.
|
|
func (cfg *Config) Validate() error {
|
|
if len(cfg.AllocateBy) <= 0 {
|
|
return errors.New("metricalloc.allocate_by is invalid")
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// LoadJSON parses a raw JSON byte-slice as generated by ToJSON().
|
|
func (cfg *Config) LoadJSON(raw []byte) error {
|
|
jcfg := &jsonConfig{}
|
|
err := json.Unmarshal(raw, jcfg)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
cfg.Default()
|
|
|
|
return cfg.applyJSONConfig(jcfg)
|
|
}
|
|
|
|
func (cfg *Config) applyJSONConfig(jcfg *jsonConfig) error {
|
|
// When unset, leave default
|
|
if len(jcfg.AllocateBy) > 0 {
|
|
cfg.AllocateBy = jcfg.AllocateBy
|
|
}
|
|
|
|
return cfg.Validate()
|
|
}
|
|
|
|
// ToJSON generates a human-friendly JSON representation of this Config.
|
|
func (cfg *Config) ToJSON() ([]byte, error) {
|
|
jcfg := cfg.toJSONConfig()
|
|
|
|
return config.DefaultJSONMarshal(jcfg)
|
|
}
|
|
|
|
func (cfg *Config) toJSONConfig() *jsonConfig {
|
|
return &jsonConfig{
|
|
AllocateBy: cfg.AllocateBy,
|
|
}
|
|
}
|
|
|
|
// ToDisplayJSON returns JSON config as a string.
|
|
func (cfg *Config) ToDisplayJSON() ([]byte, error) {
|
|
return config.DisplayJSON(cfg.toJSONConfig())
|
|
}
|