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feat: Bootstrap metastore for wal segments
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,82 @@ | ||
| package metastoreclient | ||
|
|
||
| import ( | ||
| "flag" | ||
| "fmt" | ||
|
|
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| "github.com/grafana/dskit/grpcclient" | ||
| "github.com/grafana/dskit/services" | ||
| "google.golang.org/grpc" | ||
|
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| metastorepb "github.com/grafana/loki/v3/pkg/ingester-rf1/metastore/metastorepb" | ||
| ) | ||
|
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| type Config struct { | ||
| MetastoreAddress string `yaml:"address"` | ||
| GRPCClientConfig grpcclient.Config `yaml:"grpc_client_config" doc:"description=Configures the gRPC client used to communicate with the metastore."` | ||
| } | ||
|
|
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| func (cfg *Config) RegisterFlags(f *flag.FlagSet) { | ||
| f.StringVar(&cfg.MetastoreAddress, "metastore.address", "localhost:9095", "") | ||
| cfg.GRPCClientConfig.RegisterFlagsWithPrefix("metastore.grpc-client-config", f) | ||
| } | ||
|
|
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| func (cfg *Config) Validate() error { | ||
| if cfg.MetastoreAddress == "" { | ||
| return fmt.Errorf("metastore.address is required") | ||
| } | ||
| return cfg.GRPCClientConfig.Validate() | ||
| } | ||
|
|
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| type Client struct { | ||
| metastorepb.MetastoreServiceClient | ||
| service services.Service | ||
| conn *grpc.ClientConn | ||
| config Config | ||
| } | ||
|
|
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| func New(config Config) (c *Client, err error) { | ||
| c = &Client{config: config} | ||
| c.conn, err = dial(c.config) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| c.MetastoreServiceClient = metastorepb.NewMetastoreServiceClient(c.conn) | ||
| c.service = services.NewIdleService(nil, c.stopping) | ||
| return c, nil | ||
| } | ||
|
|
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| func (c *Client) stopping(error) error { return c.conn.Close() } | ||
|
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| func (c *Client) Service() services.Service { return c.service } | ||
|
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| func dial(cfg Config) (*grpc.ClientConn, error) { | ||
| if err := cfg.Validate(); err != nil { | ||
| return nil, err | ||
| } | ||
| options, err := cfg.GRPCClientConfig.DialOption(nil, nil) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| // TODO: https://github.com/grpc/grpc-proto/blob/master/grpc/service_config/service_config.proto | ||
| options = append(options, grpc.WithDefaultServiceConfig(grpcServiceConfig)) | ||
| return grpc.Dial(cfg.MetastoreAddress, options...) | ||
| } | ||
|
|
||
| const grpcServiceConfig = `{ | ||
| "healthCheckConfig": { | ||
| "serviceName": "metastore.v1.MetastoreService.RaftLeader" | ||
| }, | ||
| "loadBalancingPolicy":"round_robin", | ||
| "methodConfig": [{ | ||
| "name": [{"service": "metastore.v1.MetastoreService"}], | ||
| "waitForReady": true, | ||
| "retryPolicy": { | ||
| "MaxAttempts": 4, | ||
| "InitialBackoff": ".01s", | ||
| "MaxBackoff": ".01s", | ||
| "BackoffMultiplier": 1.0, | ||
| "RetryableStatusCodes": [ "UNAVAILABLE" ] | ||
| } | ||
| }] | ||
| }` |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,33 @@ | ||
| package health | ||
|
|
||
| import ( | ||
| "github.com/grafana/dskit/services" | ||
| "google.golang.org/grpc/health" | ||
| "google.golang.org/grpc/health/grpc_health_v1" | ||
| ) | ||
|
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| type Service interface { | ||
| SetServingStatus(string, grpc_health_v1.HealthCheckResponse_ServingStatus) | ||
| } | ||
|
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| type noopService struct{} | ||
|
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| var NoOpService = noopService{} | ||
|
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| func (noopService) SetServingStatus(string, grpc_health_v1.HealthCheckResponse_ServingStatus) {} | ||
|
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| func NewGRPCHealthService() *GRPCHealthService { | ||
| s := health.NewServer() | ||
| return &GRPCHealthService{ | ||
| Server: s, | ||
| Service: services.NewIdleService(nil, func(error) error { | ||
| s.Shutdown() | ||
| return nil | ||
| }), | ||
| } | ||
| } | ||
|
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| type GRPCHealthService struct { | ||
| services.Service | ||
| *health.Server | ||
| } |
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