open-consul/consul/config.go

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package consul
import (
"github.com/hashicorp/memberlist"
"github.com/hashicorp/raft"
"github.com/hashicorp/serf/serf"
"io"
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"net"
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"os"
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"time"
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)
const (
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DefaultDC = "dc1"
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DefaultLANSerfPort = 8301
DefaultWANSerfPort = 8302
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)
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var (
DefaultRPCAddr = &net.TCPAddr{IP: net.ParseIP("0.0.0.0"), Port: 8300}
)
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// 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
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// 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
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// RPCAddr is the RPC address used by Consul. This should be reachable
// by the WAN and LAN
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RPCAddr *net.TCPAddr
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// 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
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RPCAdvertise *net.TCPAddr
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// SerfLANConfig is the configuration for the intra-dc serf
SerfLANConfig *serf.Config
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// SerfWANConfig is the configuration for the cross-dc serf
SerfWANConfig *serf.Config
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// 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
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// LogOutput is the location to write logs to. If this is not set,
// logs will go to stderr.
LogOutput io.Writer
// ServerUp callback can be used to trigger a notification that
// a Consul server is now up and known about.
ServerUp func()
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}
// DefaultConfig is used to return a sane default configuration
func DefaultConfig() *Config {
hostname, err := os.Hostname()
if err != nil {
panic(err)
}
conf := &Config{
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Datacenter: DefaultDC,
NodeName: hostname,
RPCAddr: DefaultRPCAddr,
RaftConfig: raft.DefaultConfig(),
SerfLANConfig: serf.DefaultConfig(),
SerfWANConfig: serf.DefaultConfig(),
ReconcileInterval: 60 * time.Second,
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}
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// WAN Serf should use the WAN timing, since we are using it
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// to communicate between DC's
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conf.SerfWANConfig.MemberlistConfig = memberlist.DefaultWANConfig()
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// Ensure we don't have port conflicts
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conf.SerfLANConfig.MemberlistConfig.BindPort = DefaultLANSerfPort
conf.SerfWANConfig.MemberlistConfig.BindPort = DefaultWANSerfPort
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// Disable shutdown on removal
conf.RaftConfig.ShutdownOnRemove = false
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return conf
}