func TestManagerEvent(t *testing.T) {
const alpha = 2
runs := make(map[int64]*run)
st := store.New()
defer close(st.Ops)
st.Ops <- store.Op{
Seqn: 1,
Mut: store.MustEncodeSet(node+"/a/addr", "1.2.3.4:5", 0),
}
st.Ops <- store.Op{
Seqn: 2,
Mut: store.MustEncodeSet(cal+"/1", "a", 0),
}
ch, err := st.Wait(store.Any, 2)
if err != nil {
panic(err)
}
x, _ := net.ResolveUDPAddr("udp", "1.2.3.4:5")
pseqn := make(chan int64, 1)
m := &Manager{
Alpha: alpha,
Self: "a",
PSeqn: pseqn,
Ops: st.Ops,
Out: make(chan Packet),
run: runs,
}
m.event(<-ch)
exp := &run{
self: "a",
seqn: 2 + alpha,
cals: []string{"a"},
addr: []*net.UDPAddr{x},
ops: st.Ops,
out: m.Out,
bound: initialWaitBound,
}
exp.c = coordinator{
crnd: 1,
size: 1,
quor: exp.quorum(),
}
exp.l = learner{
round: 1,
size: 1,
quorum: int64(exp.quorum()),
votes: map[string]int64{},
voted: []bool{false},
}
assert.Equal(t, 1, len(runs))
assert.Equal(t, exp, runs[exp.seqn])
assert.Equal(t, exp.seqn, <-pseqn)
assert.Equal(t, exp.seqn+1, m.next)
}
func TestManagerFilterPropSeqn(t *testing.T) {
ps := make(chan int64, 100)
st := store.New()
defer close(st.Ops)
m := &Manager{
DefRev: 2,
Alpha: 1,
Self: "b",
PSeqn: ps,
Store: st,
}
go m.Run()
st.Ops <- store.Op{1, store.MustEncodeSet("/ctl/cal/0", "a", 0)}
st.Ops <- store.Op{2, store.MustEncodeSet("/ctl/cal/1", "b", 0)}
st.Ops <- store.Op{3, store.Nop}
st.Ops <- store.Op{4, store.Nop}
assert.Equal(t, int64(3), <-ps)
assert.Equal(t, int64(5), <-ps)
st.Ops <- store.Op{5, store.Nop}
st.Ops <- store.Op{6, store.Nop}
assert.Equal(t, int64(7), <-ps)
}
func TestGetCalsPartial(t *testing.T) {
st := store.New()
defer close(st.Ops)
st.Ops <- store.Op{Seqn: 1, Mut: store.MustEncodeSet(cal+"/1", "a", 0)}
st.Ops <- store.Op{Seqn: 2, Mut: store.MustEncodeSet(cal+"/2", "", 0)}
st.Ops <- store.Op{Seqn: 3, Mut: store.MustEncodeSet(cal+"/3", "", 0)}
<-st.Seqns
assert.Equal(t, []string{"a"}, getCals(st))
}
func TestGetAddrs(t *testing.T) {
st := store.New()
defer close(st.Ops)
st.Ops <- store.Op{1, store.MustEncodeSet(node+"/1/addr", "1.2.3.4:5", 0)}
st.Ops <- store.Op{2, store.MustEncodeSet(node+"/2/addr", "2.3.4.5:6", 0)}
st.Ops <- store.Op{3, store.MustEncodeSet(node+"/3/addr", "3.4.5.6:7", 0)}
<-st.Seqns
x, _ := net.ResolveUDPAddr("udp", "1.2.3.4:5")
y, _ := net.ResolveUDPAddr("udp", "2.3.4.5:6")
z, _ := net.ResolveUDPAddr("udp", "3.4.5.6:7")
addrs := getAddrs(st, []string{"1", "2", "3"})
assert.Equal(t, []*net.UDPAddr{x, y, z}, addrs)
}
func TestManagerPumpDropsOldPackets(t *testing.T) {
st := store.New()
defer close(st.Ops)
x := &net.UDPAddr{net.IP{1, 2, 3, 4}, 5}
st.Ops <- store.Op{1, store.MustEncodeSet(node+"/a/addr", "1.2.3.4:5", 0)}
st.Ops <- store.Op{2, store.MustEncodeSet("/ctl/cal/0", "a", 0)}
var m Manager
m.run = make(map[int64]*run)
m.event(<-mustWait(st, 2))
m.pump()
recvPacket(&m.packet, Packet{x, mustMarshal(&msg{Seqn: proto.Int64(1)})})
m.pump()
assert.Equal(t, 0, m.Stats.WaitPackets)
}
func TestMemberSimple(t *testing.T) {
st := store.New()
defer close(st.Ops)
fp := &test.FakeProposer{Store: st}
c := make(chan string)
go Clean(c, fp.Store, fp)
fp.Propose([]byte(store.MustEncodeSet("/ctl/node/a/x", "a", store.Missing)))
fp.Propose([]byte(store.MustEncodeSet("/ctl/node/a/y", "b", store.Missing)))
fp.Propose([]byte(store.MustEncodeSet("/ctl/node/a/addr", "1.2.3.4", store.Missing)))
fp.Propose([]byte(store.MustEncodeSet("/ctl/cal/0", "a", store.Missing)))
calCh, err := fp.Wait(store.MustCompileGlob("/ctl/cal/0"), 1+<-fp.Seqns)
if err != nil {
panic(err)
}
nodeCh, err := fp.Wait(store.MustCompileGlob("/ctl/node/a/?"), 1+<-fp.Seqns)
if err != nil {
panic(err)
}
// indicate that this peer is inactive
go func() { c <- "1.2.3.4" }()
ev := <-calCh
assert.T(t, ev.IsSet())
assert.Equal(t, "", ev.Body)
cs := []int{}
ev = <-nodeCh
assert.T(t, ev.IsDel())
cs = append(cs, int(ev.Path[len(ev.Path)-1]))
nodeCh, err = fp.Wait(store.MustCompileGlob("/ctl/node/a/?"), ev.Seqn+1)
if err != nil {
panic(err)
}
ev = <-nodeCh
assert.T(t, ev.IsDel())
cs = append(cs, int(ev.Path[len(ev.Path)-1]))
sort.Ints(cs)
assert.Equal(t, []int{'x', 'y'}, cs)
}
func TestDelRun(t *testing.T) {
const alpha = 2
runs := make(map[int64]*run)
st := store.New()
defer close(st.Ops)
st.Ops <- store.Op{1, store.MustEncodeSet(node+"/a/addr", "x", 0)}
st.Ops <- store.Op{2, store.MustEncodeSet(cal+"/1", "a", 0)}
st.Ops <- store.Op{3, store.Nop}
st.Ops <- store.Op{4, store.Nop}
c2, err := st.Wait(store.Any, 2)
if err != nil {
panic(err)
}
c3, err := st.Wait(store.Any, 3)
if err != nil {
panic(err)
}
c4, err := st.Wait(store.Any, 4)
if err != nil {
panic(err)
}
pseqn := make(chan int64, 100)
m := &Manager{
Alpha: alpha,
Self: "a",
PSeqn: pseqn,
Ops: st.Ops,
Out: make(chan Packet),
run: runs,
}
m.event(<-c2)
assert.Equal(t, 1, len(m.run))
m.event(<-c3)
assert.Equal(t, 2, len(m.run))
m.event(<-c4)
assert.Equal(t, 2, len(m.run))
}
func TestManagerTickQueue(t *testing.T) {
st := store.New()
defer close(st.Ops)
st.Ops <- store.Op{1, store.MustEncodeSet(node+"/a/addr", "1.2.3.4:5", 0)}
st.Ops <- store.Op{2, store.MustEncodeSet("/ctl/cal/0", "a", 0)}
var m Manager
m.run = make(map[int64]*run)
m.Alpha = 1
m.Store = st
m.Out = make(chan Packet, 100)
m.event(<-mustWait(st, 2))
// get it to tick for seqn 3
recvPacket(&m.packet, Packet{Data: mustMarshal(&msg{Seqn: proto.Int64(3), Cmd: propose})})
m.pump()
assert.Equal(t, 1, m.tick.Len())
m.doTick(time.Now().UnixNano() + initialWaitBound*2)
assert.Equal(t, int64(1), m.Stats.TotalTicks)
}
func TestManagerPacketProcessing(t *testing.T) {
st := store.New()
defer close(st.Ops)
in := make(chan Packet)
out := make(chan Packet, 100)
var m Manager
m.run = make(map[int64]*run)
m.Alpha = 1
m.Store = st
m.In = in
m.Out = out
m.Ops = st.Ops
st.Ops <- store.Op{1, store.MustEncodeSet(node+"/a/addr", "1.2.3.4:5", 0)}
st.Ops <- store.Op{2, store.MustEncodeSet("/ctl/cal/0", "a", 0)}
m.event(<-mustWait(st, 2))
recvPacket(&m.packet, Packet{
Data: mustMarshal(&msg{Seqn: proto.Int64(2), Cmd: learn, Value: []byte("foo")}),
Addr: &net.UDPAddr{net.IP{127, 0, 0, 1}, 9999},
})
m.pump()
assert.Equal(t, 0, m.packet.Len())
}
func Main(clusterName, self, buri, rwsk, rosk string, cl *doozer.Conn, udpConn *net.UDPConn, listener, webListener net.Listener, pulseInterval, fillDelay, kickTimeout int64, hi int64) {
listenAddr := listener.Addr().String()
canWrite := make(chan bool, 1)
in := make(chan consensus.Packet, 50)
out := make(chan consensus.Packet, 50)
st := store.New()
pr := &proposer{
seqns: make(chan int64, alpha),
props: make(chan *consensus.Prop),
st: st,
}
calSrv := func(start int64) {
go gc.Pulse(self, st.Seqns, pr, pulseInterval)
go gc.Clean(st, hi, time.Tick(1e9))
var m consensus.Manager
m.Self = self
m.DefRev = start
m.Alpha = alpha
m.In = in
m.Out = out
m.Ops = st.Ops
m.PSeqn = pr.seqns
m.Props = pr.props
m.TFill = fillDelay
m.Store = st
m.Ticker = time.Tick(10e6)
go m.Run()
}
hostname, err := os.Hostname()
if err != nil {
hostname = "unknown"
}
if cl == nil { // we are the only node in a new cluster
set(st, "/ctl/name", clusterName, store.Missing)
set(st, "/ctl/node/"+self+"/addr", listenAddr, store.Missing)
set(st, "/ctl/node/"+self+"/hostname", hostname, store.Missing)
set(st, "/ctl/node/"+self+"/version", Version, store.Missing)
set(st, "/ctl/cal/0", self, store.Missing)
if buri == "" {
set(st, "/ctl/ns/"+clusterName+"/"+self, listenAddr, store.Missing)
}
calSrv(<-st.Seqns)
// Skip ahead alpha steps so that the registrar can provide a
// meaningful cluster.
for i := 0; i < alpha; i++ {
st.Ops <- store.Op{1 + <-st.Seqns, store.Nop}
}
canWrite <- true
go setReady(pr, self)
} else {
setC(cl, "/ctl/node/"+self+"/addr", listenAddr, store.Clobber)
setC(cl, "/ctl/node/"+self+"/hostname", hostname, store.Clobber)
setC(cl, "/ctl/node/"+self+"/version", Version, store.Clobber)
rev, err := cl.Rev()
if err != nil {
panic(err)
}
stop := make(chan bool, 1)
go follow(st, cl, rev+1, stop)
errs := make(chan error)
go func() {
e, ok := <-errs
if ok {
panic(e)
}
}()
doozer.Walk(cl, rev, "/", cloner{st.Ops, cl, rev}, errs)
close(errs)
st.Flush()
ch, err := st.Wait(store.Any, rev+1)
if err == nil {
<-ch
}
go func() {
n := activate(st, self, cl)
calSrv(n)
advanceUntil(cl, st.Seqns, n+alpha)
stop <- true
canWrite <- true
go setReady(pr, self)
if buri != "" {
b, err := doozer.DialUri(buri, "")
if err != nil {
panic(err)
}
setC(
b,
"/ctl/ns/"+clusterName+"/"+self,
listenAddr,
store.Missing,
)
}
}()
}
shun := make(chan string, 3) // sufficient for a cluster of 7
go member.Clean(shun, st, pr)
go server.ListenAndServe(listener, canWrite, st, pr, rwsk, rosk)
if rwsk == "" && rosk == "" && webListener != nil {
web.Store = st
web.ClusterName = clusterName
go web.Serve(webListener)
}
go func() {
for p := range out {
n, err := udpConn.WriteTo(p.Data, p.Addr)
if err != nil {
log.Println(err)
continue
}
if n != len(p.Data) {
log.Println("packet len too long:", len(p.Data))
continue
}
}
}()
selfAddr, ok := udpConn.LocalAddr().(*net.UDPAddr)
if !ok {
panic("no UDP addr")
}
lv := liveness{
timeout: kickTimeout,
ival: kickTimeout / 2,
self: selfAddr,
shun: shun,
}
for {
t := time.Now().UnixNano()
buf := make([]byte, maxUDPLen)
n, addr, err := udpConn.ReadFromUDP(buf)
if err == syscall.EINVAL {
return
}
if err != nil {
log.Println(err)
continue
}
buf = buf[:n]
lv.mark(addr, t)
lv.check(t)
in <- consensus.Packet{addr, buf}
}
}