forked from percona/percona-backup-mongodb
/
config.go
273 lines (236 loc) · 7.21 KB
/
config.go
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package pbm
import (
"reflect"
"strconv"
"strings"
"time"
"github.com/pkg/errors"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/bson/primitive"
"go.mongodb.org/mongo-driver/mongo"
"go.mongodb.org/mongo-driver/mongo/options"
"gopkg.in/yaml.v2"
"github.com/objectrocket/percona-backup-mongodb/pbm/log"
"github.com/objectrocket/percona-backup-mongodb/pbm/storage"
"github.com/objectrocket/percona-backup-mongodb/pbm/storage/blackhole"
"github.com/objectrocket/percona-backup-mongodb/pbm/storage/fs"
"github.com/objectrocket/percona-backup-mongodb/pbm/storage/s3"
)
// Config is a pbm config
type Config struct {
PITR PITRConf `bson:"pitr" json:"pitr" yaml:"pitr"`
Storage StorageConf `bson:"storage" json:"storage" yaml:"storage"`
Restore RestoreConf `bson:"restore" json:"restore,omitempty" yaml:"restore,omitempty"`
Epoch primitive.Timestamp `bson:"epoch" json:"-" yaml:"-"`
}
// PITRConf is a Point-In-Time Recovery options
type PITRConf struct {
Enabled bool `bson:"enabled" json:"enabled" yaml:"enabled"`
}
// StorageType represents a type of the destination storage for backups
type StorageType string
const (
StorageUndef StorageType = ""
StorageS3 StorageType = "s3"
StorageFilesystem StorageType = "filesystem"
StorageBlackHole StorageType = "blackhole"
)
// StorageConf is a configuration of the backup storage
type StorageConf struct {
Type StorageType `bson:"type" json:"type" yaml:"type"`
S3 s3.Conf `bson:"s3,omitempty" json:"s3,omitempty" yaml:"s3,omitempty"`
Filesystem fs.Conf `bson:"filesystem,omitempty" json:"filesystem,omitempty" yaml:"filesystem,omitempty"`
}
// RestoreConf is config options for the restore
type RestoreConf struct {
BatchSize int `bson:"batchSize" json:"batchSize,omitempty" yaml:"batchSize,omitempty"` // num of documents to buffer
NumInsertionWorkers int `bson:"numInsertionWorkers" json:"numInsertionWorkers,omitempty" yaml:"numInsertionWorkers,omitempty"`
}
type confMap map[string]reflect.Kind
// _confmap is a list of config's valid keys and its types
var _confmap confMap
func init() {
_confmap = keys(reflect.TypeOf(Config{}))
}
func keys(t reflect.Type) confMap {
v := make(confMap)
for i := 0; i < t.NumField(); i++ {
name := strings.TrimSpace(strings.Split(t.Field(i).Tag.Get("bson"), ",")[0])
typ := t.Field(i).Type
if typ.Kind() == reflect.Ptr {
typ = typ.Elem()
}
switch typ.Kind() {
case reflect.Struct:
for n, t := range keys(typ) {
v[name+"."+n] = t
}
default:
v[name] = typ.Kind()
}
}
return v
}
func (p *PBM) SetConfigByte(buf []byte) error {
var cfg Config
err := yaml.UnmarshalStrict(buf, &cfg)
if err != nil {
return errors.Wrap(err, "unmarshal yaml")
}
return errors.Wrap(p.SetConfig(cfg), "write to db")
}
func (p *PBM) SetConfig(cfg Config) error {
if cfg.Storage.Type == StorageS3 {
err := cfg.Storage.S3.Cast()
if err != nil {
return errors.Wrap(err, "cast storage")
}
}
ct, err := p.ClusterTime()
if err != nil {
return errors.Wrap(err, "get cluster time")
}
cfg.Epoch = ct
// TODO: if store or pitr changed - need to bump epoch
// TODO: struct tags to config opts `pbm:"resync,epoch"`?
p.GetConfig()
_, err = p.Conn.Database(DB).Collection(ConfigCollection).UpdateOne(
p.ctx,
bson.D{},
bson.M{"$set": cfg},
options.Update().SetUpsert(true),
)
return errors.Wrap(err, "mongo ConfigCollection UpdateOne")
}
func (p *PBM) SetConfigVar(key, val string) error {
if !ValidateConfigKey(key) {
return errors.New("invalid config key")
}
// just check if config was set
_, err := p.GetConfig()
if err != nil {
if errors.Cause(err) == mongo.ErrNoDocuments {
return errors.New("config doesn't set")
}
return err
}
var v interface{}
switch _confmap[key] {
case reflect.String:
v = val
case reflect.Int, reflect.Int64:
v, err = strconv.ParseInt(val, 10, 64)
case reflect.Float32, reflect.Float64:
v, err = strconv.ParseFloat(val, 64)
case reflect.Bool:
v, err = strconv.ParseBool(val)
}
if err != nil {
return errors.Wrapf(err, "casting value of %s", key)
}
// TODO: how to be with special case options like pitr.enabled
if key == "pitr.enabled" {
return errors.Wrap(p.confSetPITR(key, v.(bool)), "write to db")
}
_, err = p.Conn.Database(DB).Collection(ConfigCollection).UpdateOne(
p.ctx,
bson.D{},
bson.M{"$set": bson.M{key: v}},
)
return errors.Wrap(err, "write to db")
}
func (p *PBM) confSetPITR(k string, v bool) error {
ct, err := p.ClusterTime()
if err != nil {
return errors.Wrap(err, "get cluster time")
}
_, err = p.Conn.Database(DB).Collection(ConfigCollection).UpdateOne(
p.ctx,
bson.D{},
bson.M{"$set": bson.M{k: v, "pitr.changed": time.Now().Unix(), "epoch": ct}},
)
return err
}
// GetConfigVar returns value of given config vaiable
func (p *PBM) GetConfigVar(key string) (interface{}, error) {
if !ValidateConfigKey(key) {
return nil, errors.New("invalid config key")
}
bts, err := p.Conn.Database(DB).Collection(ConfigCollection).FindOne(p.ctx, bson.D{}).DecodeBytes()
if err != nil {
return nil, errors.Wrap(err, "get from db")
}
v, err := bts.LookupErr(strings.Split(key, ".")...)
switch v.Type {
case bson.TypeBoolean:
return v.Boolean(), nil
case bson.TypeInt32:
return v.Int32(), nil
case bson.TypeInt64:
return v.Int64(), nil
case bson.TypeDouble:
return v.Double(), nil
case bson.TypeString:
return v.String(), nil
default:
return nil, errors.Errorf("unexpected type %v", v.Type)
}
}
// ValidateConfigKey checks if a config key valid
func ValidateConfigKey(k string) bool {
_, ok := _confmap[k]
return ok
}
func (p *PBM) GetConfigYaml(fieldRedaction bool) ([]byte, error) {
c, err := p.GetConfig()
if err != nil {
return nil, errors.Wrap(err, "get from db")
}
if fieldRedaction {
if c.Storage.S3.Credentials.AccessKeyID != "" {
c.Storage.S3.Credentials.AccessKeyID = "***"
}
if c.Storage.S3.Credentials.SecretAccessKey != "" {
c.Storage.S3.Credentials.SecretAccessKey = "***"
}
if c.Storage.S3.Credentials.Vault.Secret != "" {
c.Storage.S3.Credentials.Vault.Secret = "***"
}
if c.Storage.S3.Credentials.Vault.Token != "" {
c.Storage.S3.Credentials.Vault.Token = "***"
}
}
b, err := yaml.Marshal(c)
return b, errors.Wrap(err, "marshal yaml")
}
func (p *PBM) GetConfig() (Config, error) {
var c Config
res := p.Conn.Database(DB).Collection(ConfigCollection).FindOne(p.ctx, bson.D{})
if res.Err() != nil {
return Config{}, errors.Wrap(res.Err(), "get")
}
err := res.Decode(&c)
return c, errors.Wrap(err, "decode")
}
// ErrStorageUndefined is an error for undefined storage
var ErrStorageUndefined = errors.New("storage undefined")
// GetStorage reads current storage config and creates and
// returns respective storage.Storage object
func (p *PBM) GetStorage(l *log.Event) (storage.Storage, error) {
c, err := p.GetConfig()
if err != nil {
return nil, errors.Wrap(err, "get config")
}
switch c.Storage.Type {
case StorageS3:
return s3.New(c.Storage.S3, l)
case StorageFilesystem:
return fs.New(c.Storage.Filesystem), nil
case StorageBlackHole:
return blackhole.New(), nil
case StorageUndef:
return nil, ErrStorageUndefined
default:
return nil, errors.Errorf("unknown storage type %s", c.Storage.Type)
}
}