418 lines
11 KiB
Go
418 lines
11 KiB
Go
package consul
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import (
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"bytes"
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"os"
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"strings"
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"testing"
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"time"
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"github.com/hashicorp/consul/acl"
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"github.com/hashicorp/consul/agent/structs"
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"github.com/hashicorp/consul/api"
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"github.com/hashicorp/consul/sdk/testutil/retry"
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"github.com/hashicorp/consul/testrpc"
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msgpackrpc "github.com/hashicorp/net-rpc-msgpackrpc"
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)
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// verifySnapshot is a helper that does a snapshot and restore.
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func verifySnapshot(t *testing.T, s *Server, dc, token string) {
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codec := rpcClient(t, s)
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defer codec.Close()
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// Set a key to a before value.
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{
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args := structs.KVSRequest{
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Datacenter: dc,
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Op: api.KVSet,
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DirEnt: structs.DirEntry{
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Key: "test",
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Value: []byte("hello"),
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},
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WriteRequest: structs.WriteRequest{
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Token: token,
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},
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}
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var out bool
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if err := msgpackrpc.CallWithCodec(codec, "KVS.Apply", &args, &out); err != nil {
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t.Fatalf("err: %v", err)
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}
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}
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// Take a snapshot.
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args := structs.SnapshotRequest{
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Datacenter: dc,
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Token: token,
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Op: structs.SnapshotSave,
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}
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var reply structs.SnapshotResponse
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snap, err := SnapshotRPC(s.connPool, s.config.Datacenter, s.config.NodeName, s.config.RPCAddr, false,
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&args, bytes.NewReader([]byte("")), &reply)
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if err != nil {
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t.Fatalf("err: %v", err)
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}
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defer snap.Close()
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// Read back the before value.
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{
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getR := structs.KeyRequest{
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Datacenter: dc,
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Key: "test",
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QueryOptions: structs.QueryOptions{
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Token: token,
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},
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}
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var dirent structs.IndexedDirEntries
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if err := msgpackrpc.CallWithCodec(codec, "KVS.Get", &getR, &dirent); err != nil {
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t.Fatalf("err: %v", err)
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}
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if len(dirent.Entries) != 1 {
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t.Fatalf("Bad: %v", dirent)
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}
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d := dirent.Entries[0]
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if string(d.Value) != "hello" {
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t.Fatalf("bad: %v", d)
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}
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}
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// Set a key to an after value.
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{
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args := structs.KVSRequest{
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Datacenter: dc,
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Op: api.KVSet,
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DirEnt: structs.DirEntry{
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Key: "test",
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Value: []byte("goodbye"),
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},
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WriteRequest: structs.WriteRequest{
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Token: token,
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},
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}
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var out bool
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if err := msgpackrpc.CallWithCodec(codec, "KVS.Apply", &args, &out); err != nil {
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t.Fatalf("err: %v", err)
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}
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}
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// Read back the before value. We do this with a retry and stale mode so
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// we can query the server we are working with, which might not be the
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// leader.
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retry.Run(t, func(r *retry.R) {
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getR := structs.KeyRequest{
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Datacenter: dc,
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Key: "test",
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QueryOptions: structs.QueryOptions{
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Token: token,
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AllowStale: true,
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},
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}
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var dirent structs.IndexedDirEntries
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if err := msgpackrpc.CallWithCodec(codec, "KVS.Get", &getR, &dirent); err != nil {
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r.Fatalf("err: %v", err)
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}
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if len(dirent.Entries) != 1 {
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r.Fatalf("Bad: %v", dirent)
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}
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d := dirent.Entries[0]
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if string(d.Value) != "goodbye" {
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r.Fatalf("bad: %v", d)
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}
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})
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// Restore the snapshot.
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args.Op = structs.SnapshotRestore
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restore, err := SnapshotRPC(s.connPool, s.config.Datacenter, s.config.NodeName, s.config.RPCAddr, false,
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&args, snap, &reply)
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if err != nil {
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t.Fatalf("err: %v", err)
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}
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defer restore.Close()
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// Read back the before value post-snapshot. Similar rationale here; use
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// stale to query the server we are working with.
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retry.Run(t, func(r *retry.R) {
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getR := structs.KeyRequest{
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Datacenter: dc,
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Key: "test",
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QueryOptions: structs.QueryOptions{
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Token: token,
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AllowStale: true,
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},
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}
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var dirent structs.IndexedDirEntries
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if err := msgpackrpc.CallWithCodec(codec, "KVS.Get", &getR, &dirent); err != nil {
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r.Fatalf("err: %v", err)
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}
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if len(dirent.Entries) != 1 {
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r.Fatalf("Bad: %v", dirent)
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}
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d := dirent.Entries[0]
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if string(d.Value) != "hello" {
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r.Fatalf("bad: %v", d)
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}
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})
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}
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func TestSnapshot(t *testing.T) {
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t.Parallel()
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dir1, s1 := testServer(t)
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defer os.RemoveAll(dir1)
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defer s1.Shutdown()
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testrpc.WaitForLeader(t, s1.RPC, "dc1")
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verifySnapshot(t, s1, "dc1", "")
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}
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func TestSnapshot_LeaderState(t *testing.T) {
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t.Parallel()
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dir1, s1 := testServer(t)
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defer os.RemoveAll(dir1)
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defer s1.Shutdown()
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testrpc.WaitForTestAgent(t, s1.RPC, "dc1")
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codec := rpcClient(t, s1)
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defer codec.Close()
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// Make a before session.
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var before string
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{
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args := structs.SessionRequest{
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Datacenter: s1.config.Datacenter,
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Op: structs.SessionCreate,
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Session: structs.Session{
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Node: s1.config.NodeName,
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TTL: "60s",
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},
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}
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if err := msgpackrpc.CallWithCodec(codec, "Session.Apply", &args, &before); err != nil {
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t.Fatalf("err: %v", err)
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}
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}
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// Take a snapshot.
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args := structs.SnapshotRequest{
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Datacenter: s1.config.Datacenter,
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Op: structs.SnapshotSave,
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}
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var reply structs.SnapshotResponse
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snap, err := SnapshotRPC(s1.connPool, s1.config.Datacenter, s1.config.NodeName, s1.config.RPCAddr, false,
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&args, bytes.NewReader([]byte("")), &reply)
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if err != nil {
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t.Fatalf("err: %v", err)
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}
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defer snap.Close()
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// Make an after session.
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var after string
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{
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args := structs.SessionRequest{
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Datacenter: s1.config.Datacenter,
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Op: structs.SessionCreate,
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Session: structs.Session{
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Node: s1.config.NodeName,
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TTL: "60s",
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},
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}
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if err := msgpackrpc.CallWithCodec(codec, "Session.Apply", &args, &after); err != nil {
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t.Fatalf("err: %v", err)
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}
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}
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// Make sure the leader has timers setup.
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if s1.sessionTimers.Get(before) == nil {
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t.Fatalf("missing session timer")
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}
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if s1.sessionTimers.Get(after) == nil {
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t.Fatalf("missing session timer")
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}
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// Restore the snapshot.
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args.Op = structs.SnapshotRestore
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restore, err := SnapshotRPC(s1.connPool, s1.config.Datacenter, s1.config.NodeName, s1.config.RPCAddr, false,
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&args, snap, &reply)
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if err != nil {
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t.Fatalf("err: %v", err)
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}
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defer restore.Close()
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// Make sure the before time is still there, and that the after timer
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// got reverted. This proves we fully cycled the leader state.
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if s1.sessionTimers.Get(before) == nil {
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t.Fatalf("missing session timer")
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}
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if s1.sessionTimers.Get(after) != nil {
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t.Fatalf("unexpected session timer")
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}
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}
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func TestSnapshot_ACLDeny(t *testing.T) {
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t.Parallel()
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dir1, s1 := testServerWithConfig(t, func(c *Config) {
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c.ACLDatacenter = "dc1"
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c.ACLsEnabled = true
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c.ACLMasterToken = "root"
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c.ACLDefaultPolicy = "deny"
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})
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defer os.RemoveAll(dir1)
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defer s1.Shutdown()
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codec := rpcClient(t, s1)
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defer codec.Close()
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testrpc.WaitForLeader(t, s1.RPC, "dc1")
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// Take a snapshot.
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func() {
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args := structs.SnapshotRequest{
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Datacenter: "dc1",
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Op: structs.SnapshotSave,
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}
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var reply structs.SnapshotResponse
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_, err := SnapshotRPC(s1.connPool, s1.config.Datacenter, s1.config.NodeName, s1.config.RPCAddr, false,
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&args, bytes.NewReader([]byte("")), &reply)
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if !acl.IsErrPermissionDenied(err) {
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t.Fatalf("err: %v", err)
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}
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}()
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// Restore a snapshot.
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func() {
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args := structs.SnapshotRequest{
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Datacenter: "dc1",
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Op: structs.SnapshotRestore,
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}
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var reply structs.SnapshotResponse
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_, err := SnapshotRPC(s1.connPool, s1.config.Datacenter, s1.config.NodeName, s1.config.RPCAddr, false,
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&args, bytes.NewReader([]byte("")), &reply)
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if !acl.IsErrPermissionDenied(err) {
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t.Fatalf("err: %v", err)
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}
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}()
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// With the token in place everything should go through.
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verifySnapshot(t, s1, "dc1", "root")
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}
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func TestSnapshot_Forward_Leader(t *testing.T) {
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dir1, s1 := testServerWithConfig(t, func(c *Config) {
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c.Bootstrap = true
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c.SerfWANConfig = nil
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// Effectively disable autopilot
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// Changes in server config leads flakiness because snapshotting
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// fails if there are config changes outstanding
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c.AutopilotInterval = 50 * time.Second
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// Since we are doing multiple restores to the same leader,
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// the default short time for a reconcile can cause the
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// reconcile to get aborted by our snapshot restore. By
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// setting it much longer than the test, we avoid this case.
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c.ReconcileInterval = 60 * time.Second
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})
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defer os.RemoveAll(dir1)
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defer s1.Shutdown()
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testrpc.WaitForTestAgent(t, s1.RPC, "dc1")
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dir2, s2 := testServerWithConfig(t, func(c *Config) {
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c.Bootstrap = false
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c.SerfWANConfig = nil
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c.AutopilotInterval = 50 * time.Second
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})
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defer os.RemoveAll(dir2)
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defer s2.Shutdown()
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// Try to join.
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joinLAN(t, s2, s1)
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testrpc.WaitForLeader(t, s2.RPC, "dc1")
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// Run against the leader and the follower to ensure we forward. When
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// we changed to Raft protocol version 3, since we only have two servers,
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// the second one isn't a voter, so the snapshot API doesn't wait for
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// that to replicate before returning success. We added some logic to
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// verifySnapshot() to poll the server we are working with in stale mode
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// in order to verify that the snapshot contents are there. Previously,
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// with Raft protocol version 2, the snapshot API would wait until the
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// follower got the information as well since it was required to meet
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// the quorum (2/2 servers), so things were synchronized properly with
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// no special logic.
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verifySnapshot(t, s1, "dc1", "")
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verifySnapshot(t, s2, "dc1", "")
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}
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func TestSnapshot_Forward_Datacenter(t *testing.T) {
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t.Parallel()
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dir1, s1 := testServerDC(t, "dc1")
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defer os.RemoveAll(dir1)
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defer s1.Shutdown()
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dir2, s2 := testServerDC(t, "dc2")
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defer os.RemoveAll(dir2)
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defer s2.Shutdown()
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testrpc.WaitForTestAgent(t, s1.RPC, "dc1")
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testrpc.WaitForTestAgent(t, s2.RPC, "dc2")
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// Try to WAN join.
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joinWAN(t, s2, s1)
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retry.Run(t, func(r *retry.R) {
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if got, want := len(s1.WANMembers()), 2; got < want {
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r.Fatalf("got %d WAN members want at least %d", got, want)
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}
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})
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// Run a snapshot from each server locally and remotely to ensure we
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// forward.
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for _, s := range []*Server{s1, s2} {
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verifySnapshot(t, s, "dc1", "")
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verifySnapshot(t, s, "dc2", "")
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}
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}
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func TestSnapshot_AllowStale(t *testing.T) {
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t.Parallel()
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dir1, s1 := testServerWithConfig(t, func(c *Config) {
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c.Bootstrap = false
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})
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defer os.RemoveAll(dir1)
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defer s1.Shutdown()
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dir2, s2 := testServerWithConfig(t, func(c *Config) {
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c.Bootstrap = false
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})
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defer os.RemoveAll(dir2)
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defer s2.Shutdown()
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// Run against the servers which aren't haven't been set up to establish
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// a leader and make sure we get a no leader error.
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for _, s := range []*Server{s1, s2} {
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// Take a snapshot.
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args := structs.SnapshotRequest{
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Datacenter: s.config.Datacenter,
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Op: structs.SnapshotSave,
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}
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var reply structs.SnapshotResponse
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_, err := SnapshotRPC(s.connPool, s.config.Datacenter, s.config.NodeName, s.config.RPCAddr, false,
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&args, bytes.NewReader([]byte("")), &reply)
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if err == nil || !strings.Contains(err.Error(), structs.ErrNoLeader.Error()) {
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t.Fatalf("err: %v", err)
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}
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}
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// Run in stale mode and make sure we get an error from Raft (snapshot
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// was attempted), and not a no leader error.
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for _, s := range []*Server{s1, s2} {
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// Take a snapshot.
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args := structs.SnapshotRequest{
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Datacenter: s.config.Datacenter,
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AllowStale: true,
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Op: structs.SnapshotSave,
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}
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var reply structs.SnapshotResponse
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_, err := SnapshotRPC(s.connPool, s.config.Datacenter, s.config.NodeName, s.config.RPCAddr, false,
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&args, bytes.NewReader([]byte("")), &reply)
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if err == nil || !strings.Contains(err.Error(), "Raft error when taking snapshot") {
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t.Fatalf("err: %v", err)
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}
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}
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}
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