open-consul/agent/consul/autopilot_test.go

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package consul
import (
"os"
"testing"
"time"
"github.com/hashicorp/consul/sdk/testutil/retry"
"github.com/hashicorp/consul/testrpc"
"github.com/hashicorp/raft"
"github.com/hashicorp/serf/serf"
"github.com/stretchr/testify/require"
)
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func TestAutopilot_IdempotentShutdown(t *testing.T) {
dir1, s1 := testServerWithConfig(t, nil)
defer os.RemoveAll(dir1)
defer s1.Shutdown()
retry.Run(t, func(r *retry.R) { r.Check(waitForLeader(s1)) })
s1.autopilot.Start()
s1.autopilot.Start()
s1.autopilot.Start()
s1.autopilot.Stop()
s1.autopilot.Stop()
s1.autopilot.Stop()
}
func TestAutopilot_CleanupDeadServer(t *testing.T) {
t.Parallel()
for i := 1; i <= 3; i++ {
testCleanupDeadServer(t, i)
}
}
func testCleanupDeadServer(t *testing.T, raftVersion int) {
dc := "dc1"
conf := func(c *Config) {
c.Datacenter = dc
c.Bootstrap = false
c.BootstrapExpect = 5
c.RaftConfig.ProtocolVersion = raft.ProtocolVersion(raftVersion)
}
dir1, s1 := testServerWithConfig(t, conf)
defer os.RemoveAll(dir1)
defer s1.Shutdown()
dir2, s2 := testServerWithConfig(t, conf)
defer os.RemoveAll(dir2)
defer s2.Shutdown()
dir3, s3 := testServerWithConfig(t, conf)
defer os.RemoveAll(dir3)
defer s3.Shutdown()
dir4, s4 := testServerWithConfig(t, conf)
defer os.RemoveAll(dir4)
defer s4.Shutdown()
dir5, s5 := testServerWithConfig(t, conf)
defer os.RemoveAll(dir5)
defer s5.Shutdown()
servers := []*Server{s1, s2, s3, s4, s5}
// Try to join
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joinLAN(t, s2, s1)
joinLAN(t, s3, s1)
joinLAN(t, s4, s1)
joinLAN(t, s5, s1)
for _, s := range servers {
testrpc.WaitForLeader(t, s.RPC, dc)
retry.Run(t, func(r *retry.R) { r.Check(wantPeers(s, 5)) })
}
require := require.New(t)
testrpc.WaitForLeader(t, s1.RPC, "dc1")
leaderIndex := -1
for i, s := range servers {
if s.IsLeader() {
leaderIndex = i
break
}
}
require.NotEqual(leaderIndex, -1)
// Shutdown two non-leader servers
killed := make(map[string]struct{})
for i, s := range servers {
if i != leaderIndex {
s.Shutdown()
killed[string(s.config.NodeID)] = struct{}{}
}
if len(killed) == 2 {
break
}
}
retry.Run(t, func(r *retry.R) {
alive := 0
for _, m := range servers[leaderIndex].LANMembers() {
if m.Status == serf.StatusAlive {
alive++
}
}
if alive != 3 {
r.Fatalf("Expected three alive servers instead of %d", alive)
}
})
// Make sure the dead servers are removed and we're back to 3 total peers
for _, s := range servers {
_, killed := killed[string(s.config.NodeID)]
if !killed {
retry.Run(t, func(r *retry.R) { r.Check(wantPeers(s, 3)) })
}
}
}
func TestAutopilot_CleanupDeadNonvoter(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()
testrpc.WaitForLeader(t, s1.RPC, "dc1")
// Have s2 join and then shut it down immediately before it gets a chance to
// be promoted to a voter.
joinLAN(t, s2, s1)
retry.Run(t, func(r *retry.R) {
r.Check(wantRaft([]*Server{s1, s2}))
})
s2.Shutdown()
retry.Run(t, func(r *retry.R) {
r.Check(wantRaft([]*Server{s1}))
})
}
func TestAutopilot_CleanupDeadServerPeriodic(t *testing.T) {
t.Parallel()
dir1, s1 := testServerWithConfig(t, func(c *Config) {
c.Datacenter = "dc1"
c.Bootstrap = true
})
defer os.RemoveAll(dir1)
defer s1.Shutdown()
conf := func(c *Config) {
c.Datacenter = "dc1"
c.Bootstrap = false
}
dir2, s2 := testServerWithConfig(t, conf)
defer os.RemoveAll(dir2)
defer s2.Shutdown()
dir3, s3 := testServerWithConfig(t, conf)
defer os.RemoveAll(dir3)
defer s3.Shutdown()
dir4, s4 := testServerWithConfig(t, conf)
defer os.RemoveAll(dir4)
defer s4.Shutdown()
dir5, s5 := testServerWithConfig(t, conf)
defer os.RemoveAll(dir5)
defer s5.Shutdown()
servers := []*Server{s1, s2, s3, s4, s5}
// Join the servers to s1, and wait until they are all promoted to
// voters.
for _, s := range servers[1:] {
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joinLAN(t, s, s1)
}
retry.Run(t, func(r *retry.R) {
r.Check(wantRaft(servers))
for _, s := range servers {
r.Check(wantPeers(s, 5))
}
})
// Kill a non-leader server
s4.Shutdown()
// Should be removed from the peers automatically
servers = []*Server{s1, s2, s3, s5}
retry.Run(t, func(r *retry.R) {
r.Check(wantRaft(servers))
for _, s := range servers {
r.Check(wantPeers(s, 4))
}
})
}
func TestAutopilot_RollingUpdate(t *testing.T) {
t.Parallel()
dir1, s1 := testServerWithConfig(t, func(c *Config) {
c.Datacenter = "dc1"
c.Bootstrap = true
})
defer os.RemoveAll(dir1)
defer s1.Shutdown()
conf := func(c *Config) {
c.Datacenter = "dc1"
c.Bootstrap = false
}
dir2, s2 := testServerWithConfig(t, conf)
defer os.RemoveAll(dir2)
defer s2.Shutdown()
dir3, s3 := testServerWithConfig(t, conf)
defer os.RemoveAll(dir3)
defer s3.Shutdown()
// Join the servers to s1, and wait until they are all promoted to
// voters.
servers := []*Server{s1, s2, s3}
for _, s := range servers[1:] {
joinLAN(t, s, s1)
}
retry.Run(t, func(r *retry.R) {
r.Check(wantRaft(servers))
for _, s := range servers {
r.Check(wantPeers(s, 3))
}
})
// Add one more server like we are doing a rolling update.
dir4, s4 := testServerWithConfig(t, conf)
defer os.RemoveAll(dir4)
defer s4.Shutdown()
joinLAN(t, s1, s4)
servers = append(servers, s4)
retry.Run(t, func(r *retry.R) {
r.Check(wantRaft(servers))
for _, s := range servers {
r.Check(wantPeers(s, 3))
}
})
// Now kill one of the "old" nodes like we are doing a rolling update.
s3.Shutdown()
isVoter := func() bool {
future := s1.raft.GetConfiguration()
if err := future.Error(); err != nil {
t.Fatalf("err: %v", err)
}
for _, s := range future.Configuration().Servers {
if string(s.ID) == string(s4.config.NodeID) {
return s.Suffrage == raft.Voter
}
}
t.Fatalf("didn't find s4")
return false
}
// Wait for s4 to stabilize, get promoted to a voter, and for s3 to be
// removed.
servers = []*Server{s1, s2, s4}
retry.Run(t, func(r *retry.R) {
r.Check(wantRaft(servers))
for _, s := range servers {
r.Check(wantPeers(s, 3))
}
if !isVoter() {
r.Fatalf("should be a voter")
}
})
}
func TestAutopilot_CleanupStaleRaftServer(t *testing.T) {
t.Parallel()
dir1, s1 := testServerDCBootstrap(t, "dc1", true)
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()
dir4, s4 := testServerDCBootstrap(t, "dc1", false)
defer os.RemoveAll(dir4)
defer s4.Shutdown()
servers := []*Server{s1, s2, s3}
// Join the servers to s1
for _, s := range servers[1:] {
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joinLAN(t, s, s1)
}
for _, s := range servers {
retry.Run(t, func(r *retry.R) { r.Check(wantPeers(s, 3)) })
}
testrpc.WaitForLeader(t, s1.RPC, "dc1")
// Add s4 to peers directly
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addVoterFuture := s1.raft.AddVoter(raft.ServerID(s4.config.NodeID), raft.ServerAddress(joinAddrLAN(s4)), 0, 0)
if err := addVoterFuture.Error(); err != nil {
t.Fatal(err)
}
// Verify we have 4 peers
peers, err := s1.numPeers()
if err != nil {
t.Fatal(err)
}
if peers != 4 {
t.Fatalf("bad: %v", peers)
}
// Wait for s4 to be removed
for _, s := range []*Server{s1, s2, s3} {
retry.Run(t, func(r *retry.R) { r.Check(wantPeers(s, 3)) })
}
}
func TestAutopilot_PromoteNonVoter(t *testing.T) {
t.Parallel()
dir1, s1 := testServerWithConfig(t, func(c *Config) {
c.Datacenter = "dc1"
c.Bootstrap = true
c.RaftConfig.ProtocolVersion = 3
c.AutopilotConfig.ServerStabilizationTime = 200 * time.Millisecond
c.ServerHealthInterval = 100 * time.Millisecond
c.AutopilotInterval = 100 * time.Millisecond
})
defer os.RemoveAll(dir1)
defer s1.Shutdown()
codec := rpcClient(t, s1)
defer codec.Close()
testrpc.WaitForLeader(t, s1.RPC, "dc1")
dir2, s2 := testServerWithConfig(t, func(c *Config) {
c.Datacenter = "dc1"
c.Bootstrap = false
c.RaftConfig.ProtocolVersion = 3
})
defer os.RemoveAll(dir2)
defer s2.Shutdown()
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joinLAN(t, s2, s1)
// Make sure we see it as a nonvoter initially. We wait until half
// the stabilization period has passed.
retry.Run(t, func(r *retry.R) {
future := s1.raft.GetConfiguration()
if err := future.Error(); err != nil {
r.Fatal(err)
}
servers := future.Configuration().Servers
if len(servers) != 2 {
r.Fatalf("bad: %v", servers)
}
if servers[1].Suffrage != raft.Nonvoter {
r.Fatalf("bad: %v", servers)
}
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health := s1.autopilot.GetServerHealth(string(servers[1].ID))
if health == nil {
r.Fatal("nil health")
}
if !health.Healthy {
r.Fatalf("bad: %v", health)
}
if time.Since(health.StableSince) < s1.config.AutopilotConfig.ServerStabilizationTime/2 {
r.Fatal("stable period not elapsed")
}
})
// Make sure it ends up as a voter.
retry.Run(t, func(r *retry.R) {
future := s1.raft.GetConfiguration()
if err := future.Error(); err != nil {
r.Fatal(err)
}
servers := future.Configuration().Servers
if len(servers) != 2 {
r.Fatalf("bad: %v", servers)
}
if servers[1].Suffrage != raft.Voter {
r.Fatalf("bad: %v", servers)
}
})
}
func TestAutopilot_MinQuorum(t *testing.T) {
dc := "dc1"
closeMap := make(map[string]chan struct{})
conf := func(c *Config) {
c.Datacenter = dc
c.Bootstrap = false
c.BootstrapExpect = 4
c.AutopilotConfig.MinQuorum = 3
c.RaftConfig.ProtocolVersion = raft.ProtocolVersion(2)
c.AutopilotInterval = 100 * time.Millisecond
//Let us know when a server is actually gone
ch := make(chan struct{})
c.NotifyShutdown = func() {
t.Logf("%v is shutdown", c.NodeName)
close(ch)
}
closeMap[c.NodeName] = ch
}
dir1, s1 := testServerWithConfig(t, conf)
defer os.RemoveAll(dir1)
defer s1.Shutdown()
dir2, s2 := testServerWithConfig(t, conf)
defer os.RemoveAll(dir2)
defer s2.Shutdown()
dir3, s3 := testServerWithConfig(t, conf)
defer os.RemoveAll(dir3)
defer s3.Shutdown()
dir4, s4 := testServerWithConfig(t, conf)
defer os.RemoveAll(dir4)
defer s4.Shutdown()
servers := map[string]*Server{s1.config.NodeName: s1,
s2.config.NodeName: s2,
s3.config.NodeName: s3,
s4.config.NodeName: s4}
// Try to join
joinLAN(t, s2, s1)
joinLAN(t, s3, s1)
joinLAN(t, s4, s1)
//Differentiate between leader and server
findStatus := func(leader bool) *Server {
for _, mem := range servers {
if mem.IsLeader() == leader {
return mem
}
if !mem.IsLeader() == !leader {
return mem
}
}
return nil
}
testrpc.WaitForLeader(t, s1.RPC, dc)
// Have autopilot take one into left
dead := findStatus(false)
if dead == nil {
t.Fatalf("no members set")
}
dead.Shutdown()
<-closeMap[dead.config.NodeName]
retry.Run(t, func(r *retry.R) {
leader := findStatus(true)
if leader == nil {
r.Fatalf("no members set")
}
for _, m := range leader.LANMembers() {
if m.Name == dead.config.NodeName && m.Status != serf.StatusLeft {
r.Fatalf("%v should be left, got %v", m.Name, m.Status.String())
}
}
})
delete(servers, dead.config.NodeName)
//Autopilot should not take this one into left
dead = findStatus(false)
if err := dead.Shutdown(); err != nil {
t.Fatalf("could not shut down %s, error %v", dead.config.NodeName, err)
}
<-closeMap[dead.config.NodeName]
retry.Run(t, func(r *retry.R) {
leader := findStatus(true)
if leader == nil {
r.Fatalf("no members set")
}
for _, m := range leader.LANMembers() {
if m.Name == dead.config.NodeName && m.Status != serf.StatusFailed {
r.Fatalf("%v should be failed, got %v", m.Name, m.Status.String())
}
}
})
}