open-consul/consul/config.go

99 lines
2.7 KiB
Go

package consul
import (
"github.com/hashicorp/memberlist"
"github.com/hashicorp/raft"
"github.com/hashicorp/serf/serf"
"io"
"net"
"os"
"time"
)
const (
DefaultDC = "dc1"
DefaultLANSerfPort = 8301
DefaultWANSerfPort = 8302
)
var (
DefaultRPCAddr = &net.TCPAddr{IP: net.ParseIP("0.0.0.0"), Port: 8300}
)
// Config is used to configure the server
type Config struct {
// Bootstrap mode is used to bring up the first Consul server.
// It is required so that it can elect a leader without any
// other nodes being present
Bootstrap bool
// Datacenter is the datacenter this Consul server represents
Datacenter string
// DataDir is the directory to store our state in
DataDir string
// Node name is the name we use to advertise. Defaults to hostname.
NodeName string
// RaftConfig is the configuration used for Raft in the local DC
RaftConfig *raft.Config
// RPCAddr is the RPC address used by Consul. This should be reachable
// by the WAN and LAN
RPCAddr *net.TCPAddr
// RPCAdvertise is the address that is advertised to other nodes for
// the RPC endpoint. This can differ from the RPC address, if for example
// the RPCAddr is unspecified "0.0.0.0:8300", but this address must be
// reachable
RPCAdvertise *net.TCPAddr
// SerfLANConfig is the configuration for the intra-dc serf
SerfLANConfig *serf.Config
// SerfWANConfig is the configuration for the cross-dc serf
SerfWANConfig *serf.Config
// ReconcileInterval controls how often we reconcile the strongly
// consistent store with the Serf info. This is used to handle nodes
// that are force removed, as well as intermittent unavailability during
// leader election.
ReconcileInterval time.Duration
// LogOutput is the location to write logs to. If this is not set,
// logs will go to stderr.
LogOutput io.Writer
}
// DefaultConfig is used to return a sane default configuration
func DefaultConfig() *Config {
hostname, err := os.Hostname()
if err != nil {
panic(err)
}
conf := &Config{
Datacenter: DefaultDC,
NodeName: hostname,
RPCAddr: DefaultRPCAddr,
RaftConfig: raft.DefaultConfig(),
SerfLANConfig: serf.DefaultConfig(),
SerfWANConfig: serf.DefaultConfig(),
ReconcileInterval: 60 * time.Second,
}
// WAN Serf should use the WAN timing, since we are using it
// to communicate between DC's
conf.SerfWANConfig.MemberlistConfig = memberlist.DefaultWANConfig()
// Ensure we don't have port conflicts
conf.SerfLANConfig.MemberlistConfig.BindPort = DefaultLANSerfPort
conf.SerfWANConfig.MemberlistConfig.BindPort = DefaultWANSerfPort
// Disable shutdown on removal
conf.RaftConfig.ShutdownOnRemove = false
return conf
}