// NewServer is used to construct a new Consul server from the
// configuration, potentially returning an error
func NewServer(config *Config) (*Server, error) {
// Check the protocol version
if err := config.CheckVersion(); err != nil {
return nil, err
}
// Check for a data directory!
if config.DataDir == "" {
return nil, fmt.Errorf("Config must provide a DataDir")
}
// Sanity check the ACLs
if err := config.CheckACL(); err != nil {
return nil, err
}
// Ensure we have a log output
if config.LogOutput == nil {
config.LogOutput = os.Stderr
}
// Create the tls wrapper for outgoing connections
tlsConf := config.tlsConfig()
tlsWrap, err := tlsConf.OutgoingTLSWrapper()
if err != nil {
return nil, err
}
// Get the incoming tls config
incomingTLS, err := tlsConf.IncomingTLSConfig()
if err != nil {
return nil, err
}
// Create a logger
logger := log.New(config.LogOutput, "", log.LstdFlags)
// Create the tombstone GC
gc, err := state.NewTombstoneGC(config.TombstoneTTL, config.TombstoneTTLGranularity)
if err != nil {
return nil, err
}
// Create server
s := &Server{
config: config,
connPool: NewPool(config.LogOutput, serverRPCCache, serverMaxStreams, tlsWrap),
eventChLAN: make(chan serf.Event, 256),
eventChWAN: make(chan serf.Event, 256),
localConsuls: make(map[string]*serverParts),
logger: logger,
reconcileCh: make(chan serf.Member, 32),
remoteConsuls: make(map[string][]*serverParts),
rpcServer: rpc.NewServer(),
rpcTLS: incomingTLS,
tombstoneGC: gc,
shutdownCh: make(chan struct{}),
}
// Initialize the authoritative ACL cache
s.aclAuthCache, err = acl.NewCache(aclCacheSize, s.aclFault)
if err != nil {
s.Shutdown()
return nil, fmt.Errorf("Failed to create ACL cache: %v", err)
}
// Set up the non-authoritative ACL cache
if s.aclCache, err = newAclCache(config, logger, s.RPC); err != nil {
s.Shutdown()
return nil, err
}
// Initialize the RPC layer
if err := s.setupRPC(tlsWrap); err != nil {
s.Shutdown()
return nil, fmt.Errorf("Failed to start RPC layer: %v", err)
}
// Initialize the Raft server
if err := s.setupRaft(); err != nil {
s.Shutdown()
return nil, fmt.Errorf("Failed to start Raft: %v", err)
}
// Initialize the lan Serf
s.serfLAN, err = s.setupSerf(config.SerfLANConfig,
s.eventChLAN, serfLANSnapshot, false)
if err != nil {
s.Shutdown()
return nil, fmt.Errorf("Failed to start lan serf: %v", err)
}
go s.lanEventHandler()
// Initialize the wan Serf
s.serfWAN, err = s.setupSerf(config.SerfWANConfig,
s.eventChWAN, serfWANSnapshot, true)
if err != nil {
s.Shutdown()
return nil, fmt.Errorf("Failed to start wan serf: %v", err)
}
go s.wanEventHandler()
// Start listening for RPC requests
go s.listen()
// Start the metrics handlers
go s.sessionStats()
return s, nil
}
// NewServer is used to construct a new Consul server from the
// configuration, potentially returning an error
func NewServer(config *Config) (*Server, error) {
// Check the protocol version.
if err := config.CheckVersion(); err != nil {
return nil, err
}
// Check for a data directory.
if config.DataDir == "" && !config.DevMode {
return nil, fmt.Errorf("Config must provide a DataDir")
}
// Sanity check the ACLs.
if err := config.CheckACL(); err != nil {
return nil, err
}
// Ensure we have a log output and create a logger.
if config.LogOutput == nil {
config.LogOutput = os.Stderr
}
logger := log.New(config.LogOutput, "", log.LstdFlags)
// Create the TLS wrapper for outgoing connections.
tlsConf := config.tlsConfig()
tlsWrap, err := tlsConf.OutgoingTLSWrapper()
if err != nil {
return nil, err
}
// Get the incoming TLS config.
incomingTLS, err := tlsConf.IncomingTLSConfig()
if err != nil {
return nil, err
}
// Create the tombstone GC.
gc, err := state.NewTombstoneGC(config.TombstoneTTL, config.TombstoneTTLGranularity)
if err != nil {
return nil, err
}
// Create server.
s := &Server{
config: config,
connPool: NewPool(config.LogOutput, serverRPCCache, serverMaxStreams, tlsWrap),
eventChLAN: make(chan serf.Event, 256),
eventChWAN: make(chan serf.Event, 256),
localConsuls: make(map[raft.ServerAddress]*agent.Server),
logger: logger,
reconcileCh: make(chan serf.Member, 32),
remoteConsuls: make(map[string][]*agent.Server, 4),
rpcServer: rpc.NewServer(),
rpcTLS: incomingTLS,
tombstoneGC: gc,
shutdownCh: make(chan struct{}),
}
// Initialize the authoritative ACL cache.
s.aclAuthCache, err = acl.NewCache(aclCacheSize, s.aclLocalFault)
if err != nil {
s.Shutdown()
return nil, fmt.Errorf("Failed to create authoritative ACL cache: %v", err)
}
// Set up the non-authoritative ACL cache. A nil local function is given
// if ACL replication isn't enabled.
var local acl.FaultFunc
if s.IsACLReplicationEnabled() {
local = s.aclLocalFault
}
if s.aclCache, err = newAclCache(config, logger, s.RPC, local); err != nil {
s.Shutdown()
return nil, fmt.Errorf("Failed to create non-authoritative ACL cache: %v", err)
}
// Initialize the RPC layer.
if err := s.setupRPC(tlsWrap); err != nil {
s.Shutdown()
return nil, fmt.Errorf("Failed to start RPC layer: %v", err)
}
// Initialize the Raft server.
if err := s.setupRaft(); err != nil {
s.Shutdown()
return nil, fmt.Errorf("Failed to start Raft: %v", err)
}
// Initialize the LAN Serf.
s.serfLAN, err = s.setupSerf(config.SerfLANConfig,
s.eventChLAN, serfLANSnapshot, false)
if err != nil {
s.Shutdown()
return nil, fmt.Errorf("Failed to start lan serf: %v", err)
}
go s.lanEventHandler()
// Initialize the WAN Serf.
s.serfWAN, err = s.setupSerf(config.SerfWANConfig,
s.eventChWAN, serfWANSnapshot, true)
if err != nil {
s.Shutdown()
return nil, fmt.Errorf("Failed to start wan serf: %v", err)
}
go s.wanEventHandler()
// Start ACL replication.
if s.IsACLReplicationEnabled() {
go s.runACLReplication()
}
// Start listening for RPC requests.
go s.listen()
// Start the metrics handlers.
go s.sessionStats()
return s, nil
}