func TestFSM_KVSCheckAndSet(t *testing.T) {
path, err := ioutil.TempDir("", "fsm")
if err != nil {
t.Fatalf("err: %v", err)
}
fsm, err := NewFSM(nil, path, os.Stderr)
if err != nil {
t.Fatalf("err: %v", err)
}
defer fsm.Close()
req := structs.KVSRequest{
Datacenter: "dc1",
Op: structs.KVSSet,
DirEnt: structs.DirEntry{
Key: "/test/path",
Flags: 0,
Value: []byte("test"),
},
}
buf, err := structs.Encode(structs.KVSRequestType, req)
if err != nil {
t.Fatalf("err: %v", err)
}
resp := fsm.Apply(makeLog(buf))
if resp != nil {
t.Fatalf("resp: %v", resp)
}
// Verify key is set
_, d, err := fsm.state.KVSGet("/test/path")
if err != nil {
t.Fatalf("err: %v", err)
}
if d == nil {
t.Fatalf("key missing")
}
// Run the check-and-set
req.Op = structs.KVSCAS
req.DirEnt.ModifyIndex = d.ModifyIndex
req.DirEnt.Value = []byte("zip")
buf, err = structs.Encode(structs.KVSRequestType, req)
if err != nil {
t.Fatalf("err: %v", err)
}
resp = fsm.Apply(makeLog(buf))
if resp.(bool) != true {
t.Fatalf("resp: %v", resp)
}
// Verify key is updated
_, d, err = fsm.state.KVSGet("/test/path")
if err != nil {
t.Fatalf("err: %v", err)
}
if string(d.Value) != "zip" {
t.Fatalf("bad: %v", d)
}
}
func TestKVS_Apply(t *testing.T) {
dir1, s1 := testServer(t)
defer os.RemoveAll(dir1)
defer s1.Shutdown()
client := rpcClient(t, s1)
defer client.Close()
testutil.WaitForLeader(t, client.Call, "dc1")
arg := structs.KVSRequest{
Datacenter: "dc1",
Op: structs.KVSSet,
DirEnt: structs.DirEntry{
Key: "test",
Flags: 42,
Value: []byte("test"),
},
}
var out bool
if err := client.Call("KVS.Apply", &arg, &out); err != nil {
t.Fatalf("err: %v", err)
}
// Verify
state := s1.fsm.State()
_, d, err := state.KVSGet("test")
if err != nil {
t.Fatalf("err: %v", err)
}
if d == nil {
t.Fatalf("should not be nil")
}
// Do a check and set
arg.Op = structs.KVSCAS
arg.DirEnt.ModifyIndex = d.ModifyIndex
arg.DirEnt.Flags = 43
if err := client.Call("KVS.Apply", &arg, &out); err != nil {
t.Fatalf("err: %v", err)
}
// Check this was applied
if out != true {
t.Fatalf("bad: %v", out)
}
// Verify
_, d, err = state.KVSGet("test")
if err != nil {
t.Fatalf("err: %v", err)
}
if d.Flags != 43 {
t.Fatalf("bad: %v", d)
}
}
// KVSPut handles a DELETE request
func (s *HTTPServer) KVSDelete(resp http.ResponseWriter, req *http.Request, args *structs.KeyRequest) (interface{}, error) {
applyReq := structs.KVSRequest{
Datacenter: args.Datacenter,
Op: structs.KVSDelete,
DirEnt: structs.DirEntry{
Key: args.Key,
},
}
applyReq.Token = args.Token
// Check for recurse
params := req.URL.Query()
if _, ok := params["recurse"]; ok {
applyReq.Op = structs.KVSDeleteTree
} else if missingKey(resp, args) {
return nil, nil
}
// Check for cas value
if _, ok := params["cas"]; ok {
casVal, err := strconv.ParseUint(params.Get("cas"), 10, 64)
if err != nil {
return nil, err
}
applyReq.DirEnt.ModifyIndex = casVal
applyReq.Op = structs.KVSDeleteCAS
}
// Make the RPC
var out bool
if err := s.agent.RPC("KVS.Apply", &applyReq, &out); err != nil {
return nil, err
}
// Only use the out value if this was a CAS
if applyReq.Op == structs.KVSDeleteCAS {
return out, nil
} else {
return true, nil
}
}
func TestFSM_KVSDeleteTree(t *testing.T) {
path, err := ioutil.TempDir("", "fsm")
if err != nil {
t.Fatalf("err: %v", err)
}
fsm, err := NewFSM(nil, path, os.Stderr)
if err != nil {
t.Fatalf("err: %v", err)
}
defer fsm.Close()
req := structs.KVSRequest{
Datacenter: "dc1",
Op: structs.KVSSet,
DirEnt: structs.DirEntry{
Key: "/test/path",
Flags: 0,
Value: []byte("test"),
},
}
buf, err := structs.Encode(structs.KVSRequestType, req)
if err != nil {
t.Fatalf("err: %v", err)
}
resp := fsm.Apply(makeLog(buf))
if resp != nil {
t.Fatalf("resp: %v", resp)
}
// Run the delete tree
req.Op = structs.KVSDeleteTree
req.DirEnt.Key = "/test"
buf, err = structs.Encode(structs.KVSRequestType, req)
if err != nil {
t.Fatalf("err: %v", err)
}
resp = fsm.Apply(makeLog(buf))
if resp != nil {
t.Fatalf("resp: %v", resp)
}
// Verify key is not set
_, d, err := fsm.state.KVSGet("/test/path")
if err != nil {
t.Fatalf("err: %v", err)
}
if d != nil {
t.Fatalf("key present")
}
}
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()
client := rpcClient(t, s1)
testutil.WaitForLeader(t, client.Call, "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 := client.Call("KVS.Apply", &arg, &out); err != nil {
t.Fatalf("err: %v", err)
}
// Delete the KV entry (tombstoned)
arg.Op = structs.KVSDelete
if err := client.Call("KVS.Apply", &arg, &out); err != nil {
t.Fatalf("err: %v", err)
}
// Ensure we have a tombstone
_, res, err := s1.fsm.State().tombstoneTable.Get("id")
if err != nil {
t.Fatalf("err: %v", err)
}
if len(res) == 0 {
t.Fatalf("missing tombstones")
}
// Check that the new leader has a pending GC expiration
testutil.WaitForResult(func() (bool, error) {
_, res, err := s1.fsm.State().tombstoneTable.Get("id")
return len(res) == 0, err
}, func(err error) {
t.Fatalf("err: %v", err)
})
}
// KVSPut handles a PUT request
func (s *HTTPServer) KVSPut(resp http.ResponseWriter, req *http.Request, args *structs.KeyRequest) (interface{}, error) {
if missingKey(resp, args) {
return nil, nil
}
applyReq := structs.KVSRequest{
Datacenter: args.Datacenter,
Op: structs.KVSSet,
DirEnt: structs.DirEntry{
Key: args.Key,
Flags: 0,
Value: nil,
},
}
applyReq.Token = args.Token
// Check for flags
params := req.URL.Query()
if _, ok := params["flags"]; ok {
flagVal, err := strconv.ParseUint(params.Get("flags"), 10, 64)
if err != nil {
return nil, err
}
applyReq.DirEnt.Flags = flagVal
}
// Check for cas value
if _, ok := params["cas"]; ok {
casVal, err := strconv.ParseUint(params.Get("cas"), 10, 64)
if err != nil {
return nil, err
}
applyReq.DirEnt.ModifyIndex = casVal
applyReq.Op = structs.KVSCAS
}
// Check for lock acquisition
if _, ok := params["acquire"]; ok {
applyReq.DirEnt.Session = params.Get("acquire")
applyReq.Op = structs.KVSLock
}
// Check for lock release
if _, ok := params["release"]; ok {
applyReq.DirEnt.Session = params.Get("release")
applyReq.Op = structs.KVSUnlock
}
// Check the content-length
if req.ContentLength > maxKVSize {
resp.WriteHeader(413)
resp.Write([]byte(fmt.Sprintf("Value exceeds %d byte limit", maxKVSize)))
return nil, nil
}
// Copy the value
buf := bytes.NewBuffer(nil)
if _, err := io.Copy(buf, req.Body); err != nil {
return nil, err
}
applyReq.DirEnt.Value = buf.Bytes()
// Make the RPC
var out bool
if err := s.agent.RPC("KVS.Apply", &applyReq, &out); err != nil {
return nil, err
}
// Only use the out value if this was a CAS
if applyReq.Op == structs.KVSSet {
return true, nil
} else {
return out, nil
}
}