361 lines
7.0 KiB
Go
361 lines
7.0 KiB
Go
package server
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import (
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"io/ioutil"
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"os"
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"os/signal"
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"os/user"
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"path/filepath"
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"strconv"
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"syscall"
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"time"
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"mbase/app/config"
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"mbase/app/maindb"
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"mbase/pkg/descr"
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"mbase/app/operator"
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"mbase/pkg/aux509"
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"mbase/pkg/logger"
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"mbase/pkg/netacl"
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handler "mbase/app/handler"
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service "mbase/app/service"
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"sigs.k8s.io/yaml"
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)
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type Server struct {
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conf *config.Config
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lg *operator.Logic
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svc *service.Service
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hand *handler.Handler
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log *logger.Logger
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nacl *netacl.NetACL
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db *maindb.Database
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x509cert []byte
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x509key []byte
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state descr.Server
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sfile string
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}
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func NewServer() (*Server, error) {
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var err error
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srv := &Server{}
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srv.log = logger.NewLogger("server")
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return srv, err
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}
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func (srv *Server) Configure() error {
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var err error
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srv.conf = config.NewConfig()
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err = srv.conf.ReadFile()
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if err != nil {
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return err
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}
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err = srv.conf.ReadEnv()
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if err != nil {
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return err
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}
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err = srv.conf.ReadOpts()
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if err != nil {
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return err
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}
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srv.sfile = filepath.Join(srv.conf.DataDir, "certmanager.yaml")
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return err
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}
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func (srv *Server) LoadState() error {
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var err error
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_, err = os.Stat(srv.sfile)
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if os.IsNotExist(err) {
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err = nil
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return err
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}
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file, err := os.Open(srv.sfile)
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if err != nil {
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return err
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}
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defer file.Close()
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stateBytes, err := ioutil.ReadAll(file)
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if err != nil {
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return err
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}
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err = yaml.Unmarshal(stateBytes, &srv.state)
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if err != nil {
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return err
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}
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return err
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}
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func (srv *Server) SaveState() error {
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var err error
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file, err := os.OpenFile(srv.sfile, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0640)
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if err != nil {
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return err
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}
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defer file.Close()
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srv.state.UpdatedAt = time.Now().Format(time.RFC3339)
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if srv.state.CreatedAt == "" {
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srv.state.CreatedAt = srv.state.UpdatedAt
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}
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stateBytes, err := yaml.Marshal(srv.state)
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if err != nil {
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return err
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}
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_, err = file.Write(stateBytes)
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if err != nil {
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return err
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}
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return err
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}
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func (srv *Server) Build() error {
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var err error
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srv.log.Infof("Build server")
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// Mkdir log and data dir
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srv.log.Infof("Create %s dir", srv.conf.DataDir)
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err = os.MkdirAll(srv.conf.DataDir, 0750)
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if err != nil {
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return err
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}
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if srv.conf.Daemon {
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logDir := filepath.Dir(srv.conf.LogPath)
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srv.log.Infof("Create %s dir", logDir)
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err = os.MkdirAll(logDir, 0750)
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if err != nil {
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return err
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}
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runDir := filepath.Dir(srv.conf.RunPath)
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srv.log.Infof("Create %s dir", runDir)
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err = os.MkdirAll(runDir, 0750)
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if err != nil {
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return err
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}
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}
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// Create X509 certs
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srv.x509cert, srv.x509key, err = aux509.CreateX509SelfSignedCert(srv.conf.Hostname)
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if err != nil {
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return err
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}
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// Load state
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err = srv.LoadState()
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if err != nil {
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return err
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}
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// Create netACL
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err = srv.nacl.AddDisabledAddresses(srv.conf.Networks.Disabled...)
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if err != nil {
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return err
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}
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srv.nacl = netacl.NewNetACL()
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err = srv.nacl.AddEnabledAddresses(srv.conf.Networks.Enabled...)
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if err != nil {
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return err
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}
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naclYAML, err := yaml.Marshal(srv.nacl)
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if err != nil {
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return err
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}
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srv.log.Infof("Network ACL is:\n%s\n", string(naclYAML))
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// Create database
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srv.db, err = maindb.NewDatabase(srv.conf.DataDir)
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err = srv.db.OpenDatabase()
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if err != nil {
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return err
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}
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// Load state
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err = srv.LoadState()
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if err != nil {
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return err
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}
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// Create logic
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logicConfig := &operator.LogicConfig{
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Database: srv.db,
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}
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srv.lg, err = operator.NewLogic(logicConfig)
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if err != nil {
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return err
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}
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if !srv.state.DatabaseInitialized {
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// Create schema
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srv.log.Infof("Init database")
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err = srv.db.InitDatabase()
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if err != nil {
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return err
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}
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srv.state.DatabaseInitialized = true
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err = srv.SaveState()
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if err != nil {
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return err
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}
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}
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// Create handler
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handlerConfig := &handler.HandlerConfig{
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Logic: srv.lg,
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}
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srv.hand = handler.NewHandler(handlerConfig)
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if err != nil {
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return err
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}
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// Create service
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serviceConfig := &service.ServiceConfig{
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Portnum: srv.conf.Service.Portnum,
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Address: srv.conf.Service.Address,
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Protocol: srv.conf.Service.Protocol,
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Hostname: srv.conf.Hostname,
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Handler: srv.hand,
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Logic: srv.lg,
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X509Cert: srv.x509cert,
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X509Key: srv.x509key,
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NetACL: srv.nacl,
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}
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srv.svc = service.NewService(serviceConfig)
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if err != nil {
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return err
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}
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return err
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}
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func (srv *Server) Run() error {
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var err error
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// Log configuration
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yamlConfig, err := srv.conf.String()
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if err != nil {
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return err
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}
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srv.log.Debugf("Server configuration:\n%s\n", yamlConfig)
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// Show current user
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currUser, err := user.Current()
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if err != nil {
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return err
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}
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srv.log.Infof("Running server as user %s", currUser.Username)
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sigs := make(chan os.Signal, 1)
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done := make(chan error, 1)
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// Run service
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startService := func(svc *service.Service, done chan error) {
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err = svc.Run()
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if err != nil {
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srv.log.Errorf("Service error: %v", err)
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done <- err
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}
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}
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go startService(srv.svc, done)
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signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
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var signal os.Signal
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select {
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case signal = <-sigs:
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srv.log.Infof("Services stopped by signal: %v", signal)
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srv.svc.Stop()
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}
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return err
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}
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func (srv *Server) PseudoFork() error {
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const successExit int = 0
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var keyEnv string = "IMX0LTSELMRF8KASWER"
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var err error
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_, isChild := os.LookupEnv(keyEnv)
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switch {
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case !isChild:
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os.Setenv(keyEnv, "TRUE")
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procAttr := syscall.ProcAttr{}
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cwd, err := os.Getwd()
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if err != nil {
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return err
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}
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var sysFiles = make([]uintptr, 3)
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sysFiles[0] = uintptr(syscall.Stdin)
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sysFiles[1] = uintptr(syscall.Stdout)
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sysFiles[2] = uintptr(syscall.Stderr)
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procAttr.Files = sysFiles
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procAttr.Env = os.Environ()
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procAttr.Dir = cwd
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_, err = syscall.ForkExec(os.Args[0], os.Args, &procAttr)
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if err != nil {
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return err
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}
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os.Exit(successExit)
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case isChild:
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_, err = syscall.Setsid()
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if err != nil {
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return err
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}
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}
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os.Unsetenv(keyEnv)
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return err
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}
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func (srv *Server) Daemonize() error {
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var err error
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if srv.conf.Daemon {
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// Restart process process
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err = srv.PseudoFork()
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if err != nil {
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return err
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}
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// Redirect stdin
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nullFile, err := os.OpenFile("/dev/null", os.O_RDWR, 0)
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if err != nil {
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return err
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}
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err = syscall.Dup2(int(nullFile.Fd()), int(os.Stdin.Fd()))
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if err != nil {
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return err
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}
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// Redirect stderr and stout
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logdir := filepath.Dir(srv.conf.LogPath)
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err = os.MkdirAll(logdir, 0750)
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if err != nil {
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return err
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}
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logFile, err := os.OpenFile(srv.conf.LogPath, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0640)
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if err != nil {
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return err
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}
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err = syscall.Dup2(int(logFile.Fd()), int(os.Stdout.Fd()))
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if err != nil {
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return err
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}
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err = syscall.Dup2(int(logFile.Fd()), int(os.Stderr.Fd()))
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if err != nil {
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return err
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}
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// Write process ID
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rundir := filepath.Dir(srv.conf.RunPath)
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err = os.MkdirAll(rundir, 0750)
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if err != nil {
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return err
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}
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pidFile, err := os.OpenFile(srv.conf.RunPath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0640)
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if err != nil {
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return err
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}
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defer pidFile.Close()
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currPid := os.Getpid()
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_, err = pidFile.WriteString(strconv.Itoa(currPid))
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if err != nil {
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return err
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}
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}
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return err
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}
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