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configs.go
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configs.go
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package cmdutils
import (
"fmt"
"os"
"path/filepath"
"github.com/pkg/errors"
ipfscluster "github.com/kebohan1/ipfs-cluster"
"github.com/kebohan1/ipfs-cluster/api/ipfsproxy"
"github.com/kebohan1/ipfs-cluster/api/rest"
"github.com/kebohan1/ipfs-cluster/config"
"github.com/kebohan1/ipfs-cluster/consensus/crdt"
"github.com/kebohan1/ipfs-cluster/consensus/raft"
"github.com/kebohan1/ipfs-cluster/datastore/badger"
"github.com/kebohan1/ipfs-cluster/informer/disk"
"github.com/kebohan1/ipfs-cluster/informer/numpin"
"github.com/kebohan1/ipfs-cluster/ipfsconn/ipfshttp"
"github.com/kebohan1/ipfs-cluster/monitor/pubsubmon"
"github.com/kebohan1/ipfs-cluster/observations"
"github.com/kebohan1/ipfs-cluster/pintracker/stateless"
)
// Configs carries config types used by a Cluster Peer.
type Configs struct {
Cluster *ipfscluster.Config
Restapi *rest.Config
Ipfsproxy *ipfsproxy.Config
Ipfshttp *ipfshttp.Config
Raft *raft.Config
Crdt *crdt.Config
Statelesstracker *stateless.Config
Pubsubmon *pubsubmon.Config
Diskinf *disk.Config
Numpininf *numpin.Config
Metrics *observations.MetricsConfig
Tracing *observations.TracingConfig
Badger *badger.Config
}
// ConfigHelper helps managing the configuration and identity files with the
// standard set of cluster components.
type ConfigHelper struct {
identity *config.Identity
manager *config.Manager
configs *Configs
configPath string
identityPath string
consensus string
}
// NewConfigHelper creates a config helper given the paths to the
// configuration and identity files.
// Remember to Shutdown() the ConfigHelper.Manager() after use.
func NewConfigHelper(configPath, identityPath, consensus string) *ConfigHelper {
ch := &ConfigHelper{
configPath: configPath,
identityPath: identityPath,
consensus: consensus,
}
ch.init()
return ch
}
// NewLoadedConfigHelper creates a config helper given the paths to the
// configuration and identity files and loads the configurations from disk.
// Remember to Shutdown() the ConfigHelper.Manager() after use.
func NewLoadedConfigHelper(configPath, identityPath string) (*ConfigHelper, error) {
cfgHelper := NewConfigHelper(configPath, identityPath, "")
err := cfgHelper.LoadFromDisk()
return cfgHelper, err
}
// LoadConfigFromDisk parses the configuration from disk.
func (ch *ConfigHelper) LoadConfigFromDisk() error {
return ch.manager.LoadJSONFileAndEnv(ch.configPath)
}
// LoadIdentityFromDisk parses the identity from disk.
func (ch *ConfigHelper) LoadIdentityFromDisk() error {
// load identity with hack for 0.11.0 - identity separation.
_, err := os.Stat(ch.identityPath)
ident := &config.Identity{}
// temporary hack to convert identity
if os.IsNotExist(err) {
clusterConfig, err := config.GetClusterConfig(ch.configPath)
if err != nil {
return err
}
err = ident.LoadJSON(clusterConfig)
if err != nil {
return errors.Wrap(err, "error loading identity")
}
err = ident.SaveJSON(ch.identityPath)
if err != nil {
return errors.Wrap(err, "error saving identity")
}
fmt.Fprintf(
os.Stderr,
"\nNOTICE: identity information extracted from %s and saved as %s.\n\n",
ch.configPath,
ch.identityPath,
)
} else { // leave this part when the hack is removed.
err = ident.LoadJSONFromFile(ch.identityPath)
if err != nil {
return fmt.Errorf("error loading identity from %s: %s", ch.identityPath, err)
}
}
err = ident.ApplyEnvVars()
if err != nil {
return errors.Wrap(err, "error applying environment variables to the identity")
}
ch.identity = ident
return nil
}
// LoadFromDisk loads both configuration and identity from disk.
func (ch *ConfigHelper) LoadFromDisk() error {
err := ch.LoadConfigFromDisk()
if err != nil {
return err
}
return ch.LoadIdentityFromDisk()
}
// Identity returns the Identity object. It returns an empty identity
// if not loaded yet.
func (ch *ConfigHelper) Identity() *config.Identity {
return ch.identity
}
// Manager returns the config manager with all the
// cluster configurations registered.
func (ch *ConfigHelper) Manager() *config.Manager {
return ch.manager
}
// Configs returns the Configs object which holds all the cluster
// configurations. Configurations are empty if they have not been loaded from
// disk.
func (ch *ConfigHelper) Configs() *Configs {
return ch.configs
}
// GetConsensus attempts to return the configured consensus.
// If the ConfigHelper was initialized with a consensus string
// then it returns that.
//
// Otherwise it checks whether one of the consensus configurations
// has been loaded. If both or non have been loaded, it returns
// an empty string.
func (ch *ConfigHelper) GetConsensus() string {
if ch.consensus != "" {
return ch.consensus
}
crdtLoaded := ch.manager.IsLoadedFromJSON(config.Consensus, ch.configs.Crdt.ConfigKey())
raftLoaded := ch.manager.IsLoadedFromJSON(config.Consensus, ch.configs.Raft.ConfigKey())
if crdtLoaded == raftLoaded { //both loaded or none
return ""
}
if crdtLoaded {
return ch.configs.Crdt.ConfigKey()
}
return ch.configs.Raft.ConfigKey()
}
// register all current cluster components
func (ch *ConfigHelper) init() {
man := config.NewManager()
cfgs := &Configs{
Cluster: &ipfscluster.Config{},
Restapi: &rest.Config{},
Ipfsproxy: &ipfsproxy.Config{},
Ipfshttp: &ipfshttp.Config{},
Raft: &raft.Config{},
Crdt: &crdt.Config{},
Statelesstracker: &stateless.Config{},
Pubsubmon: &pubsubmon.Config{},
Diskinf: &disk.Config{},
Metrics: &observations.MetricsConfig{},
Tracing: &observations.TracingConfig{},
Badger: &badger.Config{},
}
man.RegisterComponent(config.Cluster, cfgs.Cluster)
man.RegisterComponent(config.API, cfgs.Restapi)
man.RegisterComponent(config.API, cfgs.Ipfsproxy)
man.RegisterComponent(config.IPFSConn, cfgs.Ipfshttp)
man.RegisterComponent(config.PinTracker, cfgs.Statelesstracker)
man.RegisterComponent(config.Monitor, cfgs.Pubsubmon)
man.RegisterComponent(config.Informer, cfgs.Diskinf)
man.RegisterComponent(config.Observations, cfgs.Metrics)
man.RegisterComponent(config.Observations, cfgs.Tracing)
switch ch.consensus {
case cfgs.Raft.ConfigKey():
man.RegisterComponent(config.Consensus, cfgs.Raft)
case cfgs.Crdt.ConfigKey():
man.RegisterComponent(config.Consensus, cfgs.Crdt)
man.RegisterComponent(config.Datastore, cfgs.Badger)
default:
man.RegisterComponent(config.Consensus, cfgs.Raft)
man.RegisterComponent(config.Consensus, cfgs.Crdt)
man.RegisterComponent(config.Datastore, cfgs.Badger)
}
ch.identity = &config.Identity{}
ch.manager = man
ch.configs = cfgs
}
// MakeConfigFolder creates the folder to hold
// configuration and identity files.
func (ch *ConfigHelper) MakeConfigFolder() error {
f := filepath.Dir(ch.configPath)
if _, err := os.Stat(f); os.IsNotExist(err) {
err := os.MkdirAll(f, 0700)
if err != nil {
return err
}
}
return nil
}
// SaveConfigToDisk saves the configuration file to disk.
func (ch *ConfigHelper) SaveConfigToDisk() error {
err := ch.MakeConfigFolder()
if err != nil {
return err
}
return ch.manager.SaveJSON(ch.configPath)
}
// SaveIdentityToDisk saves the identity file to disk.
func (ch *ConfigHelper) SaveIdentityToDisk() error {
err := ch.MakeConfigFolder()
if err != nil {
return err
}
return ch.Identity().SaveJSON(ch.identityPath)
}
// SetupTracing propagates tracingCfg.EnableTracing to all other
// configurations. Use only when identity has been loaded or generated. The
// forceEnabled parameter allows to override the EnableTracing value.
func (ch *ConfigHelper) SetupTracing(forceEnabled bool) {
enabled := forceEnabled || ch.configs.Tracing.EnableTracing
ch.configs.Tracing.ClusterID = ch.Identity().ID.Pretty()
ch.configs.Tracing.ClusterPeername = ch.configs.Cluster.Peername
ch.configs.Tracing.EnableTracing = enabled
ch.configs.Cluster.Tracing = enabled
ch.configs.Raft.Tracing = enabled
ch.configs.Crdt.Tracing = enabled
ch.configs.Restapi.Tracing = enabled
ch.configs.Ipfshttp.Tracing = enabled
ch.configs.Ipfsproxy.Tracing = enabled
}