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registry.go
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registry.go
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// Copyright 2016 IBM Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package registry
import (
"fmt"
"os"
"github.com/Sirupsen/logrus"
"github.com/urfave/cli"
"github.com/amalgam8/amalgam8/pkg/adapters/discovery/filesystem"
kubediscovery "github.com/amalgam8/amalgam8/pkg/adapters/discovery/kubernetes"
"github.com/amalgam8/amalgam8/pkg/api"
"github.com/amalgam8/amalgam8/pkg/auth"
kubepkg "github.com/amalgam8/amalgam8/pkg/kubernetes"
"github.com/amalgam8/amalgam8/pkg/network"
"github.com/amalgam8/amalgam8/pkg/version"
"github.com/amalgam8/amalgam8/registry/cluster"
"github.com/amalgam8/amalgam8/registry/config"
"github.com/amalgam8/amalgam8/registry/replication"
"github.com/amalgam8/amalgam8/registry/server"
"github.com/amalgam8/amalgam8/registry/store"
"github.com/amalgam8/amalgam8/registry/store/eureka"
"github.com/amalgam8/amalgam8/registry/utils/i18n"
"github.com/amalgam8/amalgam8/registry/utils/logging"
"github.com/amalgam8/amalgam8/registry/utils/metrics"
)
// Main is the entrypoint for the registry when running as an executable
func Main() {
app := cli.NewApp()
app.Name = "registry"
app.Usage = "Service Registry Server"
app.Version = version.Build.Version
app.Flags = config.Flags
app.Action = func(context *cli.Context) error {
return Run(config.NewValuesFromContext(context))
}
err := app.Run(os.Args)
if err != nil {
fmt.Printf("failure running main: %s", err.Error())
}
}
// Run the registry with the given configuration
func Run(conf *config.Values) error {
// Configure logging
parsedLogLevel, err := logrus.ParseLevel(conf.LogLevel)
if err != nil {
return err
}
logrus.SetLevel(parsedLogLevel)
formatter, err := logging.GetLogFormatter(conf.LogFormat)
if err != nil {
return err
}
logrus.SetFormatter(formatter)
// Configure locales and translations
err = i18n.LoadLocales("./locales")
if err != nil {
return err
}
// Redis store requires an address and password
if conf.Store == "redis" {
if conf.StoreAddr == "" {
return fmt.Errorf("Address required for Redis store")
}
}
var rep replication.Replication
// Don't need replication if using a store that's not in memory
if conf.Store == "inmem" {
if conf.Replication {
// Wait for private network to become available
// In some cloud environments, that may take several seconds
networkAvailable := network.WaitForPrivateNetwork()
if !networkAvailable {
return fmt.Errorf("No private network is available within defined timeout")
}
// Configure and create the cluster module
clConfig := &cluster.Config{
BackendType: cluster.FilesystemBackend,
Directory: conf.ClusterDirectory,
Size: conf.ClusterSize,
}
cl, err := cluster.New(clConfig)
if err != nil {
return fmt.Errorf("Failed to create the cluster module: %s", err)
}
// Configure and create the replication module
self := cluster.NewMember(network.GetPrivateIP(), conf.ReplicationPort)
repConfig := &replication.Config{
Membership: cl.Membership(),
Registrator: cl.Registrator(self),
}
rep, err = replication.New(repConfig)
if err != nil {
return fmt.Errorf("Failed to create the replication module: %s", err)
}
}
}
var authenticator auth.Authenticator
if len(conf.AuthModes) > 0 {
auths := make([]auth.Authenticator, len(conf.AuthModes))
for i, mode := range conf.AuthModes {
switch mode {
case "trusted":
auths[i] = auth.NewTrustedAuthenticator()
case "jwt":
jwtAuth, err := auth.NewJWTAuthenticator([]byte(conf.JWTSecret))
if err != nil {
return fmt.Errorf("Failed to create the authentication module: %s", err)
}
auths[i] = jwtAuth
default:
return fmt.Errorf("Failed to create the authentication module: unrecognized authentication mode '%s'", err)
}
}
authenticator, err = auth.NewChainAuthenticator(auths)
if err != nil {
return err
}
} else {
authenticator = auth.DefaultAuthenticator()
}
catalogsExt := []store.CatalogFactory{}
// See whether kubernetes adapter is enabled
if conf.K8sURL != "" {
k8sClient, err := kubepkg.NewClient(kubepkg.Config{
URL: conf.K8sURL,
Token: conf.K8sToken,
})
if err != nil {
return err
}
k8sFactory := store.NewDiscoveryAdapter(func(namespace auth.Namespace) (api.ServiceDiscovery, error) {
return kubediscovery.New(kubediscovery.Config{
Namespace: namespace,
Client: k8sClient,
})
})
catalogsExt = append(catalogsExt, k8sFactory)
}
// See whether eureka adapter is enabled
if len(conf.EurekaURLs) > 0 {
eurekaFactory, err := eureka.New(&eureka.Config{EurekaURLs: conf.EurekaURLs})
if err != nil {
return err
}
catalogsExt = append(catalogsExt, eurekaFactory)
}
// See whether Filesystem adapter is enabled
if conf.FSCatalog != "" {
fsFactory := store.NewDiscoveryAdapter(func(namespace auth.Namespace) (api.ServiceDiscovery, error) {
return filesystem.New(filesystem.Config{
Dir: conf.FSCatalog,
Namespace: namespace,
})
})
catalogsExt = append(catalogsExt, fsFactory)
}
cmConfig := &store.Config{
DefaultTTL: conf.DefaultTTL,
MinimumTTL: conf.MinTTL,
MaximumTTL: conf.MaxTTL,
SyncWaitTime: conf.SyncTimeout,
NamespaceCapacity: conf.NamespaceCapacity,
Replication: rep,
Extensions: catalogsExt,
Store: conf.Store,
StoreAddr: conf.StoreAddr,
StorePassword: conf.StorePassword,
}
cm := store.New(cmConfig)
serverConfig := &server.Config{
HTTPAddressSpec: fmt.Sprintf(":%d", conf.APIPort),
CatalogMap: cm,
Authenticator: authenticator,
RequireHTTPS: conf.RequireHTTPS,
}
server, err := server.New(serverConfig)
if err != nil {
return err
}
go metrics.DumpPeriodically()
return server.Start()
}