*: fix spelling issues (codespell).

Signed-off-by: Dmitry Smirnov <onlyjob@member.fsf.org>

Documentation/api.md

@@ -359,7 +359,7 @@ curl 'http://127.0.0.1:2379/v2/keys/foo?wait=true&waitIndex=2008'
 #### Connection being closed prematurely
 
 The server may close a long polling connection before emitting any events.
-This can happend due to a timeout or the server being shutdown.
+This can happen due to a timeout or the server being shutdown.
 Since the HTTP header is sent immediately upon accepting the connection, the response will be seen as empty: `200 OK` and empty body.
 The clients should be prepared to deal with this scenario and retry the watch.
 

Documentation/auth_api.md

@@ -19,7 +19,7 @@ Each role has exact one associated Permission List. An permission list exists fo
 
 The special static ROOT (named `root`) role has a full permissions on all key-value resources, the permission to manage user resources and settings resources. Only the ROOT role has the permission to manage user resources and modify settings resources. The ROOT role is built-in and does not need to be created.
 
-There is also a special GUEST role, named 'guest'. These are the permissions given to unauthenticated requests to etcd. This role will be created automatically, and by default allows access to the full keyspace due to backward compatability. (etcd did not previously authenticate any actions.). This role can be modified by a ROOT role holder at any time, to reduce the capabilities of unauthenticated users.
+There is also a special GUEST role, named 'guest'. These are the permissions given to unauthenticated requests to etcd. This role will be created automatically, and by default allows access to the full keyspace due to backward compatibility. (etcd did not previously authenticate any actions.). This role can be modified by a ROOT role holder at any time, to reduce the capabilities of unauthenticated users.
 
 #### Permissions
 

Documentation/metrics.md

@@ -60,7 +60,7 @@ Example Prometheus queries that may be useful from these metrics (across all etc
     
     Rate of reads and writes by action, across all servers across a time window of `1m`. The reason why `max` is used
      for writes as opposed to `sum` for reads is because all of etcd nodes in the cluster apply all writes to their stores.
-    Shows the rate of successfull readonly/write queries across all servers, across a time window of `1m`.
+    Shows the rate of successful readonly/write queries across all servers, across a time window of `1m`.
  * `sum(rate(etcd_store_watch_requests_total{job="etcd"}[1m]))`
     
     Shows rate of new watch requests per second. Likely driven by how often watched keys change. 

client/discover.go

@@ -16,6 +16,6 @@ package client
 
 // Discoverer is an interface that wraps the Discover method.
 type Discoverer interface {
-	// Dicover looks up the etcd servers for the domain.
+	// Discover looks up the etcd servers for the domain.
 	Discover(domain string) ([]string, error)
 }

client/srv_test.go

@@ -84,7 +84,7 @@ func TestSRVDiscover(t *testing.T) {
 			if service == "etcd-server" {
 				return "", tt.withoutSSL, nil
 			}
-			return "", nil, errors.New("Unkown service in mock")
+			return "", nil, errors.New("Unknown service in mock")
 		}
 
 		d := NewSRVDiscover()

discovery/srv_test.go

@@ -106,7 +106,7 @@ func TestSRVGetCluster(t *testing.T) {
 			if service == "etcd-server" {
 				return "", tt.withoutSSL, nil
 			}
-			return "", nil, errors.New("Unkown service in mock")
+			return "", nil, errors.New("Unknown service in mock")
 		}
 		resolveTCPAddr = func(network, addr string) (*net.TCPAddr, error) {
 			if tt.dns == nil || tt.dns[addr] == "" {

etcdctl/command/member_commands.go

@@ -162,7 +162,7 @@ func actionMemberRemove(c *cli.Context) {
 	err = mAPI.Remove(ctx, removalID)
 	removeCancel()
 	if err != nil {
-		fmt.Fprintf(os.Stderr, "Recieved an error trying to remove member %s: %s", removalID, err.Error())
+		fmt.Fprintf(os.Stderr, "Received an error trying to remove member %s: %s", removalID, err.Error())
 		os.Exit(1)
 	}
 

etcdmain/etcd.go

@@ -367,7 +367,7 @@ func startProxy(cfg *config) error {
 	uf := func() []string {
 		gcls, err := etcdserver.GetClusterFromRemotePeers(peerURLs, tr)
 		// TODO: remove the 2nd check when we fix GetClusterFromPeers
-		// GetClusterFromPeers should not return nil error with an invaild empty cluster
+		// GetClusterFromPeers should not return nil error with an invalid empty cluster
 		if err != nil {
 			plog.Warningf("proxy: %v", err)
 			return []string{}

raft/design.md

@@ -45,7 +45,7 @@ When in `snapshot` state, leader stops sending any `replication message`.
 
 A newly elected leader sets the progresses of all the followers to `probe` state with `match` = 0 and `next` = last index. The leader slowly (at most once per heartbeat) sends `replication message` to the follower and probes its progress.
 
-A progress changes to `replicate` when the follower replies with a non-rejection `msgAppResp`, which implies that it has matched the index sent. At this point, leader starts to stream log entries to the follower fast. The progress will fall back to `probe` when the follower replies a rejection `msgAppResp` or the link layer reports the follower is unreachable. We aggressively reset `next` to `match`+1 since if we receive any `msgAppResp` soon, both `match` and `next` will increase directly to the `index` in `msgAppResp`. (We might end up with sending some duplicate entries when agressively reset `next` too low.  see open question)
+A progress changes to `replicate` when the follower replies with a non-rejection `msgAppResp`, which implies that it has matched the index sent. At this point, leader starts to stream log entries to the follower fast. The progress will fall back to `probe` when the follower replies a rejection `msgAppResp` or the link layer reports the follower is unreachable. We aggressively reset `next` to `match`+1 since if we receive any `msgAppResp` soon, both `match` and `next` will increase directly to the `index` in `msgAppResp`. (We might end up with sending some duplicate entries when aggressively reset `next` too low.  see open question)
 
 A progress changes from `probe` to `snapshot` when the follower falls very far behind and requires a snapshot. After sending `msgSnap`, the leader waits until the success, failure or abortion of the previous snapshot sent. The progress will go back to `probe` after the sending result is applied.
 

raft/raft.go

@@ -189,7 +189,7 @@ func newRaft(c *Config) *raft {
 		lead:    None,
 		raftLog: raftlog,
 		// 4MB for now and hard code it
-		// TODO(xiang): add a config arguement into newRaft after we add
+		// TODO(xiang): add a config argument into newRaft after we add
 		// the max inflight message field.
 		maxMsgSize:       c.MaxSizePerMsg,
 		maxInflight:      c.MaxInflightMsgs,

raft/raft_test.go

@@ -780,7 +780,7 @@ func TestIsElectionTimeout(t *testing.T) {
 }
 
 // ensure that the Step function ignores the message from old term and does not pass it to the
-// acutal stepX function.
+// actual stepX function.
 func TestStepIgnoreOldTermMsg(t *testing.T) {
 	called := false
 	fakeStep := func(r *raft, m pb.Message) {

rafthttp/functional_test.go

@@ -51,7 +51,7 @@ func TestSendMessage(t *testing.T) {
 
 	data := []byte("some data")
 	tests := []raftpb.Message{
-		// these messages are set to send to itself, which faciliates testing.
+		// these messages are set to send to itself, which facilitates testing.
 		{Type: raftpb.MsgProp, From: 1, To: 2, Entries: []raftpb.Entry{{Data: data}}},
 		// TODO: send out MsgApp which fits msgapp stream but the term doesn't match
 		{Type: raftpb.MsgApp, From: 1, To: 2, Term: 1, Index: 3, LogTerm: 0, Entries: []raftpb.Entry{{Index: 4, Term: 1, Data: data}}, Commit: 3},

rafthttp/http.go

@@ -118,7 +118,7 @@ func (h *handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	// Write StatusNoContet header after the message has been processed by
-	// raft, which faciliates the client to report MsgSnap status.
+	// raft, which facilitates the client to report MsgSnap status.
 	w.WriteHeader(http.StatusNoContent)
 }
 

storage/key_index_test.go

@@ -308,7 +308,7 @@ func TestKeyIndexCompact(t *testing.T) {
 		},
 	}
 
-	// Continous Compaction
+	// Continuous Compaction
 	ki := newTestKeyIndex()
 	for i, tt := range tests {
 		am := make(map[revision]struct{})

wal/wal_test.go

@@ -420,7 +420,7 @@ func TestOpenForRead(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	// make 10 seperate files
+	// make 10 separate files
 	for i := 0; i < 10; i++ {
 		es := []raftpb.Entry{{Index: uint64(i)}}
 		if err = w.Save(raftpb.HardState{}, es); err != nil {
@@ -434,7 +434,7 @@ func TestOpenForRead(t *testing.T) {
 	unlockIndex := uint64(5)
 	w.ReleaseLockTo(unlockIndex)
 
-	// All are avaliable for read
+	// All are available for read
 	w2, err := OpenForRead(p, walpb.Snapshot{})
 	defer w2.Close()
 	if err != nil {
@@ -475,7 +475,7 @@ func TestReleaseLockTo(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	// make 10 seperate files
+	// make 10 separate files
 	for i := 0; i < 10; i++ {
 		es := []raftpb.Entry{{Index: uint64(i)}}
 		if err = w.Save(raftpb.HardState{}, es); err != nil {