frostfs-node/pkg/services/control/server/server.go

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package control
import (
"crypto/ecdsa"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/container"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/netmap"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/engine"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/control"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/replicator"
)
// Server is an entity that serves
// Control service on storage node.
type Server struct {
*cfg
}
// HealthChecker is component interface for calculating
// the current health status of a node.
type HealthChecker interface {
// Must calculate and return current status of the node in FrostFS network map.
//
// If status can not be calculated for any reason,
// control.netmapStatus_STATUS_UNDEFINED should be returned.
NetmapStatus() control.NetmapStatus
// Must calculate and return current health status of the node application.
//
// If status can not be calculated for any reason,
// control.HealthStatus_HEALTH_STATUS_UNDEFINED should be returned.
HealthStatus() control.HealthStatus
}
// NodeState is an interface of storage node network state.
type NodeState interface {
// SetNetmapStatus switches the storage node to the given network status.
//
// If status is control.NetmapStatus_MAINTENANCE and maintenance is allowed
// in the network settings, the node additionally starts local maintenance.
SetNetmapStatus(st control.NetmapStatus) error
// ForceMaintenance works like SetNetmapStatus(control.NetmapStatus_MAINTENANCE)
// but starts local maintenance regardless of the network settings.
ForceMaintenance() error
}
// Option of the Server's constructor.
type Option func(*cfg)
type cfg struct {
key *ecdsa.PrivateKey
allowedKeys [][]byte
healthChecker HealthChecker
netMapSrc netmap.Source
cnrSrc container.Source
replicator *replicator.Replicator
nodeState NodeState
treeService TreeService
s *engine.StorageEngine
}
func defaultCfg() *cfg {
return &cfg{}
}
// New creates, initializes and returns new Server instance.
func New(opts ...Option) *Server {
c := defaultCfg()
for _, opt := range opts {
opt(c)
}
return &Server{
cfg: c,
}
}
// WithKey returns option to set private key
// used for signing responses.
func WithKey(key *ecdsa.PrivateKey) Option {
return func(c *cfg) {
c.key = key
}
}
// WithAuthorizedKeys returns option to add list of public
// keys that have rights to use Control service.
func WithAuthorizedKeys(keys [][]byte) Option {
return func(c *cfg) {
c.allowedKeys = append(c.allowedKeys, keys...)
}
}
// WithHealthChecker returns option to set component
// to calculate node health status.
func WithHealthChecker(hc HealthChecker) Option {
return func(c *cfg) {
c.healthChecker = hc
}
}
// WithNetMapSource returns option to set network map storage.
func WithNetMapSource(netMapSrc netmap.Source) Option {
return func(c *cfg) {
c.netMapSrc = netMapSrc
}
}
// WithContainerSource returns option to set container storage.
func WithContainerSource(cnrSrc container.Source) Option {
return func(c *cfg) {
c.cnrSrc = cnrSrc
}
}
// WithReplicator returns option to set network map storage.
func WithReplicator(r *replicator.Replicator) Option {
return func(c *cfg) {
c.replicator = r
}
}
// WithNodeState returns option to set node network state component.
func WithNodeState(state NodeState) Option {
return func(c *cfg) {
c.nodeState = state
}
}
// WithLocalStorage returns option to set local storage engine that
// contains information about shards.
func WithLocalStorage(engine *engine.StorageEngine) Option {
return func(c *cfg) {
c.s = engine
}
}
// WithTreeService returns an option to set tree service.
func WithTreeService(s TreeService) Option {
return func(c *cfg) {
c.treeService = s
}
}