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package config |
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|
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import ( |
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"fmt" |
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"os" |
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"time" |
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|
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"gopkg.in/yaml.v3" |
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) |
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|
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// Config represents the coordinator configuration |
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type Config struct { |
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Database DatabaseConfig `yaml:"database"` |
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GRPC GRPCConfig `yaml:"grpc"` |
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HTTP HTTPConfig `yaml:"http"` |
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Coordinator CoordinatorConfig `yaml:"coordinator"` |
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Health HealthConfig `yaml:"health"` |
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} |
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|
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// DatabaseConfig contains database settings |
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type DatabaseConfig struct { |
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Type string `yaml:"type"` // "bbolt" or "postgres" |
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Path string `yaml:"path"` // For bbolt |
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URL string `yaml:"url"` // For postgres |
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} |
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|
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// GRPCConfig contains gRPC server settings |
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type GRPCConfig struct { |
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Port int `yaml:"port"` |
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MaxMessageSize int `yaml:"max_message_size"` |
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EnableReflection bool `yaml:"enable_reflection"` |
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} |
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|
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// HTTPConfig contains HTTP server settings |
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type HTTPConfig struct { |
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Enabled bool `yaml:"enabled"` |
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Port int `yaml:"port"` |
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} |
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|
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// CoordinatorConfig contains coordinator-specific settings |
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type CoordinatorConfig struct { |
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NodeTimeout time.Duration `yaml:"node_timeout"` |
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HeartbeatInterval time.Duration `yaml:"heartbeat_interval"` |
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ReplicationFactor int `yaml:"replication_factor"` |
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MaxNodesPerChunk int `yaml:"max_nodes_per_chunk"` |
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CleanupInterval time.Duration `yaml:"cleanup_interval"` |
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NodeInactiveAfter time.Duration `yaml:"node_inactive_after"` |
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GeographicSpread bool `yaml:"geographic_spread"` |
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} |
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|
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// HealthConfig contains health monitoring settings |
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type HealthConfig struct { |
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CheckInterval time.Duration `yaml:"check_interval"` |
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MetricsEnabled bool `yaml:"metrics_enabled"` |
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MetricsPort int `yaml:"metrics_port"` |
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} |
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|
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// DefaultConfig returns a configuration with sensible defaults |
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func DefaultConfig() *Config { |
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return &Config{ |
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Database: DatabaseConfig{ |
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Type: "bbolt", |
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Path: "coordinator.db", |
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}, |
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GRPC: GRPCConfig{ |
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Port: 8080, |
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MaxMessageSize: 4 * 1024 * 1024, // 4MB |
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EnableReflection: false, |
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}, |
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HTTP: HTTPConfig{ |
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Enabled: true, |
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Port: 8090, |
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}, |
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Coordinator: CoordinatorConfig{ |
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NodeTimeout: 30 * time.Second, |
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HeartbeatInterval: 10 * time.Second, |
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ReplicationFactor: 3, |
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MaxNodesPerChunk: 10, |
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CleanupInterval: 5 * time.Minute, |
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NodeInactiveAfter: 60 * time.Second, |
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GeographicSpread: true, |
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}, |
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Health: HealthConfig{ |
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CheckInterval: 30 * time.Second, |
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MetricsEnabled: true, |
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MetricsPort: 8091, |
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}, |
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} |
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} |
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|
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// Load reads configuration from a YAML file, merging with defaults |
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func Load(path string) (*Config, error) { |
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cfg := DefaultConfig() |
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|
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if _, err := os.Stat(path); os.IsNotExist(err) { |
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// Config file doesn't exist, use defaults |
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return cfg, nil |
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} |
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|
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data, err := os.ReadFile(path) |
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if err != nil { |
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return nil, fmt.Errorf("failed to read config file %s: %w", path, err) |
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} |
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|
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if err := yaml.Unmarshal(data, cfg); err != nil { |
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return nil, fmt.Errorf("failed to parse config file %s: %w", path, err) |
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} |
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|
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// Validate configuration |
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if err := cfg.Validate(); err != nil { |
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return nil, fmt.Errorf("invalid configuration: %w", err) |
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} |
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|
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return cfg, nil |
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} |
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|
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// Validate checks if the configuration is valid |
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func (c *Config) Validate() error { |
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if c.Database.Type == "" { |
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return fmt.Errorf("database type is required") |
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} |
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|
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if c.Database.Type == "bbolt" && c.Database.Path == "" { |
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return fmt.Errorf("database path is required for bbolt") |
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} |
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|
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if c.Database.Type == "postgres" && c.Database.URL == "" { |
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return fmt.Errorf("database URL is required for postgres") |
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} |
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|
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if c.GRPC.Port <= 0 || c.GRPC.Port > 65535 { |
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return fmt.Errorf("invalid gRPC port: %d", c.GRPC.Port) |
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} |
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|
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if c.HTTP.Enabled && (c.HTTP.Port <= 0 || c.HTTP.Port > 65535) { |
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return fmt.Errorf("invalid HTTP port: %d", c.HTTP.Port) |
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} |
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|
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if c.Coordinator.ReplicationFactor <= 0 { |
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return fmt.Errorf("replication factor must be positive") |
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} |
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|
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if c.Coordinator.MaxNodesPerChunk <= 0 { |
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return fmt.Errorf("max nodes per chunk must be positive") |
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} |
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|
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return nil |
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} |
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|
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// Save writes the configuration to a YAML file |
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func (c *Config) Save(path string) error { |
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data, err := yaml.Marshal(c) |
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if err != nil { |
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return fmt.Errorf("failed to marshal config: %w", err) |
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} |
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|
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if err := os.WriteFile(path, data, 0644); err != nil { |
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return fmt.Errorf("failed to write config file %s: %w", path, err) |
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} |
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|
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return nil |
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} |