main.go
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// design touchstones
// configured entirely via environment variables
// minimal configurable options
// a single global cluster
// easy cluster formation
// todo
// dns resolver for services
package main
import (
"log"
"os"
"time"
"github.com/hashicorp/memberlist"
"github.com/hashicorp/serf/serf"
)
func main() {
c := DefaultConfig()
if os.Getenv("CASCADE_BIND") != "" {
c.BindAddr = os.Getenv("CASCADE_BIND")
}
// agent does everything tbh
agent := setupAgent(c)
log.Println(agent)
// agent.Run()
}
func setupAgent(config *Config) *Agent {
bindIP, bindPort, err := config.AddrParts(config.BindAddr)
if err != nil {
log.Panic(err)
}
serfConfig := serf.DefaultConfig()
serfConfig.MemberlistConfig.BindAddr = bindIP
serfConfig.MemberlistConfig.BindPort = bindPort
serfConfig.MemberlistConfig.AdvertiseAddr = ""
serfConfig.MemberlistConfig.AdvertisePort = 0
serfConfig.ProtocolVersion = uint8(serf.ProtocolVersionMax)
serfConfig.CoalescePeriod = 3 * time.Second
serfConfig.QuiescentPeriod = time.Second
serfConfig.QueryResponseSizeLimit = 1024
serfConfig.QuerySizeLimit = 1024
serfConfig.UserEventSizeLimit = 512
serfConfig.UserCoalescePeriod = 3 * time.Second
serfConfig.UserQuiescentPeriod = time.Second
// TODO: look at reconnect/tombstone settings w more scrutiny
serfConfig.ReconnectInterval = 0
serfConfig.ReconnectTimeout = 0
serfConfig.TombstoneTimeout = 0
serfConfig.BroadcastTimeout = 0
// TODO: what are the implications of true here o_O
serfConfig.EnableNameConflictResolution = true
// hardcode DefaultWANConfig because cascade is designed to be
// used as a single global system.
serfConfig.MemberlistConfig = memberlist.DefaultWANConfig()
serfConfig.MemberlistConfig.BindAddr = bindIP
serfConfig.MemberlistConfig.BindPort = bindPort
agent := Create(config, serfConfig)
return agent
}