open-consul/consul/leader_test.go

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package consul
import (
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"errors"
"fmt"
"os"
"testing"
"time"
"github.com/hashicorp/consul/consul/structs"
"github.com/hashicorp/consul/testutil"
"github.com/hashicorp/net-rpc-msgpackrpc"
"github.com/hashicorp/serf/serf"
)
func TestLeader_RegisterMember(t *testing.T) {
dir1, s1 := testServer(t)
defer os.RemoveAll(dir1)
defer s1.Shutdown()
dir2, c1 := testClient(t)
defer os.RemoveAll(dir2)
defer c1.Shutdown()
// Try to join
addr := fmt.Sprintf("127.0.0.1:%d",
s1.config.SerfLANConfig.MemberlistConfig.BindPort)
if _, err := c1.JoinLAN([]string{addr}); err != nil {
t.Fatalf("err: %v", err)
}
testutil.WaitForLeader(t, s1.RPC, "dc1")
// Client should be registered
state := s1.fsm.State()
testutil.WaitForResult(func() (bool, error) {
_, node, err := state.GetNode(c1.config.NodeName)
if err != nil {
t.Fatalf("err: %v", err)
}
return node != nil, nil
}, func(err error) {
t.Fatalf("client not registered")
})
// Should have a check
_, checks, err := state.NodeChecks(nil, c1.config.NodeName)
if err != nil {
t.Fatalf("err: %v", err)
}
if len(checks) != 1 {
t.Fatalf("client missing check")
}
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if checks[0].CheckID != SerfCheckID {
t.Fatalf("bad check: %v", checks[0])
}
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if checks[0].Name != SerfCheckName {
t.Fatalf("bad check: %v", checks[0])
}
if checks[0].Status != structs.HealthPassing {
t.Fatalf("bad check: %v", checks[0])
}
// Server should be registered
_, node, err := state.GetNode(s1.config.NodeName)
if err != nil {
t.Fatalf("err: %v", err)
}
if node == nil {
t.Fatalf("server not registered")
}
// Service should be registered
_, services, err := state.NodeServices(nil, s1.config.NodeName)
if err != nil {
t.Fatalf("err: %v", err)
}
if _, ok := services.Services["consul"]; !ok {
t.Fatalf("consul service not registered: %v", services)
}
}
func TestLeader_FailedMember(t *testing.T) {
dir1, s1 := testServer(t)
defer os.RemoveAll(dir1)
defer s1.Shutdown()
dir2, c1 := testClient(t)
defer os.RemoveAll(dir2)
defer c1.Shutdown()
testutil.WaitForLeader(t, s1.RPC, "dc1")
// Try to join
addr := fmt.Sprintf("127.0.0.1:%d",
s1.config.SerfLANConfig.MemberlistConfig.BindPort)
if _, err := c1.JoinLAN([]string{addr}); err != nil {
t.Fatalf("err: %v", err)
}
// Fail the member
c1.Shutdown()
// Should be registered
state := s1.fsm.State()
testutil.WaitForResult(func() (bool, error) {
_, node, err := state.GetNode(c1.config.NodeName)
if err != nil {
t.Fatalf("err: %v", err)
}
return node != nil, nil
}, func(err error) {
t.Fatalf("client not registered")
})
// Should have a check
_, checks, err := state.NodeChecks(nil, c1.config.NodeName)
if err != nil {
t.Fatalf("err: %v", err)
}
if len(checks) != 1 {
t.Fatalf("client missing check")
}
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if checks[0].CheckID != SerfCheckID {
t.Fatalf("bad check: %v", checks[0])
}
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if checks[0].Name != SerfCheckName {
t.Fatalf("bad check: %v", checks[0])
}
testutil.WaitForResult(func() (bool, error) {
_, checks, err = state.NodeChecks(nil, c1.config.NodeName)
if err != nil {
t.Fatalf("err: %v", err)
}
return checks[0].Status == structs.HealthCritical, errors.New(checks[0].Status)
}, func(err error) {
t.Fatalf("check status is %v, should be critical", err)
})
}
func TestLeader_LeftMember(t *testing.T) {
dir1, s1 := testServer(t)
defer os.RemoveAll(dir1)
defer s1.Shutdown()
dir2, c1 := testClient(t)
defer os.RemoveAll(dir2)
defer c1.Shutdown()
// Try to join
addr := fmt.Sprintf("127.0.0.1:%d",
s1.config.SerfLANConfig.MemberlistConfig.BindPort)
if _, err := c1.JoinLAN([]string{addr}); err != nil {
t.Fatalf("err: %v", err)
}
state := s1.fsm.State()
// Should be registered
testutil.WaitForResult(func() (bool, error) {
_, node, err := state.GetNode(c1.config.NodeName)
if err != nil {
t.Fatalf("err: %v", err)
}
return node != nil, nil
}, func(err error) {
t.Fatalf("client should be registered")
})
// Node should leave
c1.Leave()
c1.Shutdown()
// Should be deregistered
testutil.WaitForResult(func() (bool, error) {
_, node, err := state.GetNode(c1.config.NodeName)
if err != nil {
t.Fatalf("err: %v", err)
}
return node == nil, nil
}, func(err error) {
t.Fatalf("client should not be registered")
})
}
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func TestLeader_ReapMember(t *testing.T) {
dir1, s1 := testServer(t)
defer os.RemoveAll(dir1)
defer s1.Shutdown()
dir2, c1 := testClient(t)
defer os.RemoveAll(dir2)
defer c1.Shutdown()
// Try to join
addr := fmt.Sprintf("127.0.0.1:%d",
s1.config.SerfLANConfig.MemberlistConfig.BindPort)
if _, err := c1.JoinLAN([]string{addr}); err != nil {
t.Fatalf("err: %v", err)
}
state := s1.fsm.State()
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// Should be registered
testutil.WaitForResult(func() (bool, error) {
_, node, err := state.GetNode(c1.config.NodeName)
if err != nil {
t.Fatalf("err: %v", err)
}
return node != nil, nil
}, func(err error) {
t.Fatalf("client should be registered")
})
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// Simulate a node reaping
mems := s1.LANMembers()
var c1mem serf.Member
for _, m := range mems {
if m.Name == c1.config.NodeName {
c1mem = m
c1mem.Status = StatusReap
break
}
}
s1.reconcileCh <- c1mem
// Should be deregistered; we have to poll quickly here because
// anti-entropy will put it back.
reaped := false
for start := time.Now(); time.Since(start) < 5*time.Second; {
_, node, err := state.GetNode(c1.config.NodeName)
if err != nil {
t.Fatalf("err: %v", err)
}
if node == nil {
reaped = true
break
}
}
if !reaped {
t.Fatalf("client should not be registered")
}
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}
func TestLeader_Reconcile_ReapMember(t *testing.T) {
dir1, s1 := testServer(t)
defer os.RemoveAll(dir1)
defer s1.Shutdown()
testutil.WaitForLeader(t, s1.RPC, "dc1")
// Register a non-existing member
dead := structs.RegisterRequest{
Datacenter: s1.config.Datacenter,
Node: "no-longer-around",
Address: "127.1.1.1",
Check: &structs.HealthCheck{
Node: "no-longer-around",
CheckID: SerfCheckID,
Name: SerfCheckName,
Status: structs.HealthCritical,
},
}
var out struct{}
if err := s1.RPC("Catalog.Register", &dead, &out); err != nil {
t.Fatalf("err: %v", err)
}
// Force a reconciliation
if err := s1.reconcile(); err != nil {
t.Fatalf("err: %v", err)
}
// Node should be gone
state := s1.fsm.State()
_, node, err := state.GetNode("no-longer-around")
if err != nil {
t.Fatalf("err: %v", err)
}
if node != nil {
t.Fatalf("client registered")
}
}
func TestLeader_Reconcile(t *testing.T) {
dir1, s1 := testServer(t)
defer os.RemoveAll(dir1)
defer s1.Shutdown()
dir2, c1 := testClient(t)
defer os.RemoveAll(dir2)
defer c1.Shutdown()
// Join before we have a leader, this should cause a reconcile!
addr := fmt.Sprintf("127.0.0.1:%d",
s1.config.SerfLANConfig.MemberlistConfig.BindPort)
if _, err := c1.JoinLAN([]string{addr}); err != nil {
t.Fatalf("err: %v", err)
}
// Should not be registered
state := s1.fsm.State()
_, node, err := state.GetNode(c1.config.NodeName)
if err != nil {
t.Fatalf("err: %v", err)
}
if node != nil {
t.Fatalf("client registered")
}
// Should be registered
testutil.WaitForResult(func() (bool, error) {
_, node, err = state.GetNode(c1.config.NodeName)
if err != nil {
t.Fatalf("err: %v", err)
}
return node != nil, nil
}, func(err error) {
t.Fatalf("client should be registered")
})
}
func TestLeader_LeftServer(t *testing.T) {
dir1, s1 := testServer(t)
defer os.RemoveAll(dir1)
defer s1.Shutdown()
dir2, s2 := testServerDCBootstrap(t, "dc1", false)
defer os.RemoveAll(dir2)
defer s2.Shutdown()
dir3, s3 := testServerDCBootstrap(t, "dc1", false)
defer os.RemoveAll(dir3)
defer s3.Shutdown()
servers := []*Server{s1, s2, s3}
// Try to join
addr := fmt.Sprintf("127.0.0.1:%d",
s1.config.SerfLANConfig.MemberlistConfig.BindPort)
if _, err := s2.JoinLAN([]string{addr}); err != nil {
t.Fatalf("err: %v", err)
}
if _, err := s3.JoinLAN([]string{addr}); err != nil {
t.Fatalf("err: %v", err)
}
for _, s := range servers {
testutil.WaitForResult(func() (bool, error) {
peers, _ := s.numPeers()
return peers == 3, nil
}, func(err error) {
t.Fatalf("should have 3 peers")
})
}
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testutil.WaitForResult(func() (bool, error) {
// Kill any server
servers[0].Shutdown()
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// Force remove the non-leader (transition to left state)
if err := servers[1].RemoveFailedNode(servers[0].config.NodeName); err != nil {
t.Fatalf("err: %v", err)
}
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for _, s := range servers[1:] {
peers, _ := s.numPeers()
return peers == 2, errors.New(fmt.Sprintf("%d", peers))
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}
return true, nil
}, func(err error) {
t.Fatalf("err: %s", err)
})
}
func TestLeader_LeftLeader(t *testing.T) {
dir1, s1 := testServer(t)
defer os.RemoveAll(dir1)
defer s1.Shutdown()
dir2, s2 := testServerDCBootstrap(t, "dc1", false)
defer os.RemoveAll(dir2)
defer s2.Shutdown()
dir3, s3 := testServerDCBootstrap(t, "dc1", false)
defer os.RemoveAll(dir3)
defer s3.Shutdown()
servers := []*Server{s1, s2, s3}
// Try to join
addr := fmt.Sprintf("127.0.0.1:%d",
s1.config.SerfLANConfig.MemberlistConfig.BindPort)
if _, err := s2.JoinLAN([]string{addr}); err != nil {
t.Fatalf("err: %v", err)
}
if _, err := s3.JoinLAN([]string{addr}); err != nil {
t.Fatalf("err: %v", err)
}
for _, s := range servers {
testutil.WaitForResult(func() (bool, error) {
peers, _ := s.numPeers()
return peers == 3, nil
}, func(err error) {
t.Fatalf("should have 3 peers")
})
}
// Kill the leader!
var leader *Server
for _, s := range servers {
if s.IsLeader() {
leader = s
break
}
}
if leader == nil {
t.Fatalf("Should have a leader")
}
leader.Leave()
leader.Shutdown()
time.Sleep(100 * time.Millisecond)
var remain *Server
for _, s := range servers {
if s == leader {
continue
}
remain = s
testutil.WaitForResult(func() (bool, error) {
peers, _ := s.numPeers()
return peers == 2, errors.New(fmt.Sprintf("%d", peers))
}, func(err error) {
t.Fatalf("should have 2 peers: %v", err)
})
}
// Verify the old leader is deregistered
state := remain.fsm.State()
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testutil.WaitForResult(func() (bool, error) {
_, node, err := state.GetNode(leader.config.NodeName)
if err != nil {
t.Fatalf("err: %v", err)
}
return node == nil, nil
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}, func(err error) {
t.Fatalf("leader should be deregistered")
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})
}
func TestLeader_MultiBootstrap(t *testing.T) {
dir1, s1 := testServer(t)
defer os.RemoveAll(dir1)
defer s1.Shutdown()
dir2, s2 := testServer(t)
defer os.RemoveAll(dir2)
defer s2.Shutdown()
servers := []*Server{s1, s2}
// Try to join
addr := fmt.Sprintf("127.0.0.1:%d",
s1.config.SerfLANConfig.MemberlistConfig.BindPort)
if _, err := s2.JoinLAN([]string{addr}); err != nil {
t.Fatalf("err: %v", err)
}
for _, s := range servers {
testutil.WaitForResult(func() (bool, error) {
peers := s.serfLAN.Members()
return len(peers) == 2, nil
}, func(err error) {
t.Fatalf("should have 2 peers")
})
}
// Ensure we don't have multiple raft peers
for _, s := range servers {
peers, _ := s.numPeers()
if peers != 1 {
t.Fatalf("should only have 1 raft peer!")
}
}
}
func TestLeader_TombstoneGC_Reset(t *testing.T) {
dir1, s1 := testServer(t)
defer os.RemoveAll(dir1)
defer s1.Shutdown()
dir2, s2 := testServerDCBootstrap(t, "dc1", false)
defer os.RemoveAll(dir2)
defer s2.Shutdown()
dir3, s3 := testServerDCBootstrap(t, "dc1", false)
defer os.RemoveAll(dir3)
defer s3.Shutdown()
servers := []*Server{s1, s2, s3}
// Try to join
addr := fmt.Sprintf("127.0.0.1:%d",
s1.config.SerfLANConfig.MemberlistConfig.BindPort)
if _, err := s2.JoinLAN([]string{addr}); err != nil {
t.Fatalf("err: %v", err)
}
if _, err := s3.JoinLAN([]string{addr}); err != nil {
t.Fatalf("err: %v", err)
}
for _, s := range servers {
testutil.WaitForResult(func() (bool, error) {
peers, _ := s.numPeers()
return peers == 3, nil
}, func(err error) {
t.Fatalf("should have 3 peers")
})
}
var leader *Server
for _, s := range servers {
if s.IsLeader() {
leader = s
break
}
}
if leader == nil {
t.Fatalf("Should have a leader")
}
// Check that the leader has a pending GC expiration
if !leader.tombstoneGC.PendingExpiration() {
t.Fatalf("should have pending expiration")
}
// Kill the leader
leader.Shutdown()
time.Sleep(100 * time.Millisecond)
// Wait for a new leader
leader = nil
testutil.WaitForResult(func() (bool, error) {
for _, s := range servers {
if s.IsLeader() {
leader = s
return true, nil
}
}
return false, nil
}, func(err error) {
t.Fatalf("should have leader")
})
// Check that the new leader has a pending GC expiration
testutil.WaitForResult(func() (bool, error) {
return leader.tombstoneGC.PendingExpiration(), nil
}, func(err error) {
t.Fatalf("should have pending expiration")
})
}
func TestLeader_ReapTombstones(t *testing.T) {
dir1, s1 := testServerWithConfig(t, func(c *Config) {
c.TombstoneTTL = 50 * time.Millisecond
c.TombstoneTTLGranularity = 10 * time.Millisecond
})
defer os.RemoveAll(dir1)
defer s1.Shutdown()
codec := rpcClient(t, s1)
testutil.WaitForLeader(t, s1.RPC, "dc1")
// Create a KV entry
arg := structs.KVSRequest{
Datacenter: "dc1",
Op: structs.KVSSet,
DirEnt: structs.DirEntry{
Key: "test",
Value: []byte("test"),
},
}
var out bool
if err := msgpackrpc.CallWithCodec(codec, "KVS.Apply", &arg, &out); err != nil {
t.Fatalf("err: %v", err)
}
// Delete the KV entry (tombstoned).
arg.Op = structs.KVSDelete
if err := msgpackrpc.CallWithCodec(codec, "KVS.Apply", &arg, &out); err != nil {
t.Fatalf("err: %v", err)
}
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// Make sure there's a tombstone.
state := s1.fsm.State()
func() {
snap := state.Snapshot()
defer snap.Close()
stones, err := snap.Tombstones()
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if err != nil {
t.Fatalf("err: %s", err)
}
if stones.Next() == nil {
t.Fatalf("missing tombstones")
}
if stones.Next() != nil {
t.Fatalf("unexpected extra tombstones")
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}
}()
// Check that the new leader has a pending GC expiration by
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// watching for the tombstone to get removed.
testutil.WaitForResult(func() (bool, error) {
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snap := state.Snapshot()
defer snap.Close()
stones, err := snap.Tombstones()
if err != nil {
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return false, err
}
return stones.Next() == nil, nil
}, func(err error) {
t.Fatalf("err: %v", err)
})
}