/
config.go
188 lines (158 loc) · 4.39 KB
/
config.go
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package admin
import (
"context"
"errors"
"time"
"go.uber.org/zap"
"github.com/kakao/varlog/internal/admin/mrmanager"
"github.com/kakao/varlog/internal/admin/snmanager"
"github.com/kakao/varlog/internal/admin/snwatcher"
"github.com/kakao/varlog/internal/admin/stats"
"github.com/kakao/varlog/internal/flags"
"github.com/kakao/varlog/pkg/types"
)
const (
defaultClusterID = flags.DefaultClusterID
DefaultListenAddress = "127.0.0.1:9090"
DefaultReplicationFactor = flags.DefaultReplicationFactor
DefaultLogStreamGCTimeout = 24 * time.Hour
)
type config struct {
cid types.ClusterID
listenAddress string
replicationFactor int
logStreamGCTimeout time.Duration
disableAutoLogStreamSync bool
enableAutoUnseal bool
mrmgr mrmanager.MetadataRepositoryManager
snmgr snmanager.StorageNodeManager
snSelector ReplicaSelector
statRepository stats.Repository
snwatcherOpts []snwatcher.Option
logger *zap.Logger
}
func newConfig(opts []Option) (config, error) {
cfg := config{
cid: defaultClusterID,
listenAddress: DefaultListenAddress,
replicationFactor: DefaultReplicationFactor,
logStreamGCTimeout: DefaultLogStreamGCTimeout,
logger: zap.NewNop(),
}
for _, opt := range opts {
opt.apply(&cfg)
}
if err := cfg.validate(); err != nil {
return cfg, err
}
if err := cfg.ensureDefault(); err != nil {
return cfg, err
}
return cfg, nil
}
func (cfg config) validate() error {
if len(cfg.listenAddress) == 0 {
return errors.New("no listen address")
}
if cfg.replicationFactor < 1 {
return errors.New("non-positive replication factor")
}
if cfg.mrmgr == nil {
return errors.New("mr manager is nil")
}
if cfg.snmgr == nil {
return errors.New("sn manager is nil")
}
if cfg.logger == nil {
return errors.New("logger is nil")
}
return nil
}
func (cfg *config) ensureDefault() error {
if cfg.snSelector == nil {
rs, err := NewReplicaSelector(ReplicaSelectorNameLFU, cfg.mrmgr.ClusterMetadataView(), int(cfg.replicationFactor))
if err != nil {
return err
}
cfg.snSelector = rs
}
if cfg.statRepository == nil {
cfg.statRepository = stats.NewRepository(context.TODO(), cfg.mrmgr.ClusterMetadataView())
}
return nil
}
type Option interface {
apply(*config)
}
type funcOption struct {
f func(*config)
}
func newFuncOption(f func(*config)) *funcOption {
return &funcOption{f: f}
}
func (fo *funcOption) apply(cfg *config) {
fo.f(cfg)
}
func WithClusterID(cid types.ClusterID) Option {
return newFuncOption(func(cfg *config) {
cfg.cid = cid
})
}
func WithListenAddress(listen string) Option {
return newFuncOption(func(cfg *config) {
cfg.listenAddress = listen
})
}
func WithReplicationFactor(replicationFactor int) Option {
return newFuncOption(func(cfg *config) {
cfg.replicationFactor = replicationFactor
})
}
// WithLogStreamGCTimeout sets expiration duration for garbage log streams.
// To turn off log stream GC, a very large value can be set.
func WithLogStreamGCTimeout(logStreamGCTimeout time.Duration) Option {
return newFuncOption(func(cfg *config) {
cfg.logStreamGCTimeout = logStreamGCTimeout
})
}
// WithoutAutoLogStreamSync disables automatic sync job between replicas in the log stream.
func WithoutAutoLogStreamSync() Option {
return newFuncOption(func(cfg *config) {
cfg.disableAutoLogStreamSync = true
})
}
func WithAutoUnseal() Option {
return newFuncOption(func(cfg *config) {
cfg.enableAutoUnseal = true
})
}
func WithLogger(logger *zap.Logger) Option {
return newFuncOption(func(cfg *config) {
cfg.logger = logger
})
}
func WithMetadataRepositoryManager(mrMgr mrmanager.MetadataRepositoryManager) Option {
return newFuncOption(func(cfg *config) {
cfg.mrmgr = mrMgr
})
}
func WithStorageNodeManager(snMgr snmanager.StorageNodeManager) Option {
return newFuncOption(func(cfg *config) {
cfg.snmgr = snMgr
})
}
func WithReplicaSelector(replicaSelector ReplicaSelector) Option {
return newFuncOption(func(cfg *config) {
cfg.snSelector = replicaSelector
})
}
func WithStatisticsRepository(statsRepos stats.Repository) Option {
return newFuncOption(func(cfg *config) {
cfg.statRepository = statsRepos
})
}
func WithStorageNodeWatcherOptions(opts ...snwatcher.Option) Option {
return newFuncOption(func(cfg *config) {
cfg.snwatcherOpts = opts
})
}