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Add meta key validations and more tests

This commit is contained in:
Kyle Havlovitz 2017-01-09 11:21:49 -08:00
parent e44bcb9716
commit 84504a20fc
No known key found for this signature in database
GPG Key ID: 8A5E6B173056AD6C
11 changed files with 357 additions and 55 deletions
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52
command/agent/agent.go
View File

@ -42,11 +42,26 @@ const (
"but no reason was provided. This is a default message."
defaultServiceMaintReason = "Maintenance mode is enabled for this " +
"service, but no reason was provided. This is a default message."
// The meta key prefix reserved for Consul's internal use
metaKeyReservedPrefix = "consul-"
// The maximum number of metadata key pairs allowed to be registered
metaMaxKeyPairs = 64
// The maximum allowed length of a metadata key
metaKeyMaxLength = 128
// The maximum allowed length of a metadata value
metaValueMaxLength = 512
)
var (
// dnsNameRe checks if a name or tag is dns-compatible.
dnsNameRe = regexp.MustCompile(`^[a-zA-Z0-9\-]+$`)
// metaKeyFormat checks if a metadata key string is valid
metaKeyFormat = regexp.MustCompile(`^[a-zA-Z0-9_-]+$`).MatchString
)
/*
@ -1686,15 +1701,13 @@ func (a *Agent) loadMetadata(conf *Config) error {
a.state.Lock()
defer a.state.Unlock()
if len(conf.Meta) > metaMaxKeyPairs {
return fmt.Errorf("Node metadata cannot contain more than %d key/value pairs", metaMaxKeyPairs)
}
for key, value := range conf.Meta {
if key == "" {
return fmt.Errorf("Key name cannot be blank")
}
if strings.Contains(key, ":") {
return fmt.Errorf("Key name cannot contain ':' character: %s", key)
}
if strings.HasPrefix(key, "consul-") {
return fmt.Errorf("Key prefix 'consul-' is reserved for internal use")
if err := validateMetaPair(key, value); err != nil {
return fmt.Errorf("Couldn't load metadata pair ('%s', '%s'): %s", key, value, err)
}
a.state.metadata[key] = value
}
@ -1704,6 +1717,29 @@ func (a *Agent) loadMetadata(conf *Config) error {
return nil
}
// validateMetaPair checks that the given key/value pair is in a valid format
func validateMetaPair(key, value string) error {
if key == "" {
return fmt.Errorf("Key cannot be blank")
}
if !metaKeyFormat(key) {
return fmt.Errorf("Key contains invalid characters")
}
if len(key) > metaKeyMaxLength {
return fmt.Errorf("Key is longer than %d chars", metaKeyMaxLength)
}
if strings.Contains(key, ":") {
return fmt.Errorf("Key contains ':' character")
}
if strings.HasPrefix(key, metaKeyReservedPrefix) {
return fmt.Errorf("Key prefix '%s' is reserved for internal use", metaKeyReservedPrefix)
}
if len(value) > metaValueMaxLength {
return fmt.Errorf("Value is longer than %d characters", metaValueMaxLength)
}
return nil
}
// unloadMetadata resets the local metadata state
func (a *Agent) unloadMetadata() error {
a.state.Lock()

48
command/agent/agent_test.go
View File

@ -1862,12 +1862,13 @@ func TestAgent_metadata(t *testing.T) {
"key1": "value1",
"key2": "value2",
}
// Should succeed
if err := agent.loadMetadata(config); err != nil {
t.Fatalf("err: %s", err)
}
agent.unloadMetadata()
// Should fail, keys can't be blank
// Should get error
config.Meta = map[string]string{
"": "value1",
}
@ -1876,23 +1877,48 @@ func TestAgent_metadata(t *testing.T) {
}
agent.unloadMetadata()
// Should fail, keys can't contain ':'
config.Meta = map[string]string{
"key:123": "value1",
// Should get error
tooManyKeys := make(map[string]string)
for i := 0; i < metaMaxKeyPairs+1; i++ {
tooManyKeys[string(i)] = "value"
}
if err := agent.loadMetadata(config); err == nil {
t.Fatalf("should have failed")
}
agent.unloadMetadata()
}
// Should fail, keys can't begin with 'consul-'
config.Meta = map[string]string{
"consul-key": "value1",
func TestAgent_validateMetaPair(t *testing.T) {
longKey := fmt.Sprintf(fmt.Sprintf("%%%ds", metaKeyMaxLength+1), "")
longValue := fmt.Sprintf(fmt.Sprintf("%%%ds", metaValueMaxLength+1), "")
pairs := []struct {
Key string
Value string
Success bool
}{
// valid pair
{"key", "value", true},
// invalid, blank key
{"", "value", false},
// allowed special chars in key name
{"k_e-y", "value", true},
// ':' in key name
{"k:ey", "value", false},
// disallowed special chars in key name
{"(%key&)", "value", false},
// key too long
{longKey, "value", false},
// reserved prefix
{metaKeyReservedPrefix + "key", "value", false},
// value too long
{"key", longValue, false},
}
if err := agent.loadMetadata(config); err == nil {
t.Fatalf("should have failed")
for _, pair := range pairs {
err := validateMetaPair(pair.Key, pair.Value)
if pair.Success != (err == nil) {
t.Fatalf("bad: %v, %v", pair, err)
}
}
agent.unloadMetadata()
}
func TestAgent_GetCoordinate(t *testing.T) {

10
command/agent/catalog_endpoint.go
View File

@ -64,17 +64,10 @@ func (s *HTTPServer) CatalogNodes(resp http.ResponseWriter, req *http.Request) (
// Setup the request
args := structs.DCSpecificRequest{}
s.parseSource(req, &args.Source)
s.parseMetaFilter(req, &args.NodeMetaKey, &args.NodeMetaValue)
if done := s.parse(resp, req, &args.Datacenter, &args.QueryOptions); done {
return nil, nil
}
// Try to parse node metadata filter params
if filter, ok := req.URL.Query()["node-meta"]; ok && len(filter) > 0 {
pair := strings.SplitN(filter[0], ":", 2)
args.NodeMetaKey = pair[0]
if len(pair) == 2 {
args.NodeMetaValue = pair[1]
}
}
var out structs.IndexedNodes
defer setMeta(resp, &out.QueryMeta)
@ -93,6 +86,7 @@ func (s *HTTPServer) CatalogNodes(resp http.ResponseWriter, req *http.Request) (
func (s *HTTPServer) CatalogServices(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
// Set default DC
args := structs.DCSpecificRequest{}
s.parseMetaFilter(req, &args.NodeMetaKey, &args.NodeMetaValue)
if done := s.parse(resp, req, &args.Datacenter, &args.QueryOptions); done {
return nil, nil
}

50
command/agent/catalog_endpoint_test.go
View File

@ -145,7 +145,7 @@ func TestCatalogNodes(t *testing.T) {
}
}
func TestCatalogNodes_metaFilter(t *testing.T) {
func TestCatalogNodes_MetaFilter(t *testing.T) {
dir, srv := makeHTTPServer(t)
defer os.RemoveAll(dir)
defer srv.Shutdown()
@ -496,6 +496,54 @@ func TestCatalogServices(t *testing.T) {
}
}
func TestCatalogServices_NodeMetaFilter(t *testing.T) {
dir, srv := makeHTTPServer(t)
defer os.RemoveAll(dir)
defer srv.Shutdown()
defer srv.agent.Shutdown()
testutil.WaitForLeader(t, srv.agent.RPC, "dc1")
// Register node
args := &structs.RegisterRequest{
Datacenter: "dc1",
Node: "foo",
Address: "127.0.0.1",
NodeMeta: map[string]string{
"somekey": "somevalue",
},
Service: &structs.NodeService{
Service: "api",
},
}
var out struct{}
if err := srv.agent.RPC("Catalog.Register", args, &out); err != nil {
t.Fatalf("err: %v", err)
}
req, err := http.NewRequest("GET", "/v1/catalog/services?node-meta=somekey:somevalue", nil)
if err != nil {
t.Fatalf("err: %v", err)
}
resp := httptest.NewRecorder()
obj, err := srv.CatalogServices(resp, req)
if err != nil {
t.Fatalf("err: %v", err)
}
assertIndex(t, resp)
services := obj.(structs.Services)
if len(services) != 1 {
t.Fatalf("bad: %v", obj)
}
if _, ok := services[args.Service.Service]; !ok {
t.Fatalf("bad: %v", services)
}
}
func TestCatalogServiceNodes(t *testing.T) {
dir, srv := makeHTTPServer(t)
defer os.RemoveAll(dir)

12
command/agent/http.go
View File

@ -584,6 +584,18 @@ func (s *HTTPServer) parseSource(req *http.Request, source *structs.QuerySource)
}
}
// parseMetaFilter is used to parse the ?node-meta=key:value query parameter, used for
// filtering results to nodes with the given metadata key/value
func (s *HTTPServer) parseMetaFilter(req *http.Request, key *string, value *string) {
if filter, ok := req.URL.Query()["node-meta"]; ok && len(filter) > 0 {
pair := strings.SplitN(filter[0], ":", 2)
*key = pair[0]
if len(pair) == 2 {
*value = pair[1]
}
}
}
// parse is a convenience method for endpoints that need
// to use both parseWait and parseDC.
func (s *HTTPServer) parse(resp http.ResponseWriter, req *http.Request, dc *string, b *structs.QueryOptions) bool {

9
consul/catalog_endpoint.go
View File

@ -196,7 +196,14 @@ func (c *Catalog) ListServices(args *structs.DCSpecificRequest, reply *structs.I
&reply.QueryMeta,
state.GetQueryWatch("Services"),
func() error {
index, services, err := state.Services()
var index uint64
var services structs.Services
var err error
if args.NodeMetaKey != "" {
index, services, err = state.ServicesByNodeMeta(args.NodeMetaKey, args.NodeMetaValue)
} else {
index, services, err = state.Services()
}
if err != nil {
return err
}

66
consul/catalog_endpoint_test.go
View File

@ -1062,6 +1062,72 @@ func TestCatalog_ListServices(t *testing.T) {
}
}
func TestCatalog_ListServices_MetaFilter(t *testing.T) {
dir1, s1 := testServer(t)
defer os.RemoveAll(dir1)
defer s1.Shutdown()
codec := rpcClient(t, s1)
defer codec.Close()
// Filter by a specific meta k/v pair
args := structs.DCSpecificRequest{
Datacenter: "dc1",
NodeMetaKey: "somekey",
NodeMetaValue: "somevalue",
}
var out structs.IndexedServices
err := msgpackrpc.CallWithCodec(codec, "Catalog.ListServices", &args, &out)
if err != nil {
t.Fatalf("err: %v", err)
}
testutil.WaitForLeader(t, s1.RPC, "dc1")
// Add a new node with the right meta k/v pair
node := &structs.Node{Node: "foo", Address: "127.0.0.1", Meta: map[string]string{"somekey": "somevalue"}}
if err := s1.fsm.State().EnsureNode(1, node); err != nil {
t.Fatalf("err: %v", err)
}
// Add a service to the new node
if err := s1.fsm.State().EnsureService(2, "foo", &structs.NodeService{ID: "db", Service: "db", Tags: []string{"primary"}, Address: "127.0.0.1", Port: 5000}); err != nil {
t.Fatalf("err: %v", err)
}
if err := msgpackrpc.CallWithCodec(codec, "Catalog.ListServices", &args, &out); err != nil {
t.Fatalf("err: %v", err)
}
if len(out.Services) != 1 {
t.Fatalf("bad: %v", out)
}
if out.Services["db"] == nil {
t.Fatalf("bad: %v", out.Services["db"])
}
if len(out.Services["db"]) != 1 {
t.Fatalf("bad: %v", out)
}
if out.Services["db"][0] != "primary" {
t.Fatalf("bad: %v", out)
}
// Now filter on a nonexistent meta k/v pair
args = structs.DCSpecificRequest{
Datacenter: "dc1",
NodeMetaKey: "somekey",
NodeMetaValue: "invalid",
}
out = structs.IndexedServices{}
err = msgpackrpc.CallWithCodec(codec, "Catalog.ListServices", &args, &out)
if err != nil {
t.Fatalf("err: %v", err)
}
// Should get an empty list of nodes back
if len(out.Services) != 0 {
t.Fatalf("bad: %v", out.Services)
}
}
func TestCatalog_ListServices_Blocking(t *testing.T) {
dir1, s1 := testServer(t)
defer os.RemoveAll(dir1)

50
consul/state/state_store.go
View File

@ -781,6 +781,56 @@ func (s *StateStore) Services() (uint64, structs.Services, error) {
return idx, results, nil
}
// Services returns all services, filtered by given node metadata.
func (s *StateStore) ServicesByNodeMeta(key, value string) (uint64, structs.Services, error) {
tx := s.db.Txn(false)
defer tx.Abort()
// Get the table index.
idx := maxIndexTxn(tx, s.getWatchTables("ServiceNodes")...)
// Retrieve all of the nodes with the meta k/v pair
nodes, err := tx.Get("nodes", "meta", key, value)
if err != nil {
return 0, nil, fmt.Errorf("failed nodes lookup: %s", err)
}
// Populate the services map
unique := make(map[string]map[string]struct{})
for node := nodes.Next(); node != nil; node = nodes.Next() {
n := node.(*structs.Node)
// List all the services on the node
services, err := tx.Get("services", "node", n.Node)
if err != nil {
return 0, nil, fmt.Errorf("failed querying services: %s", err)
}
// Rip through the services and enumerate them and their unique set of
// tags.
for service := services.Next(); service != nil; service = services.Next() {
svc := service.(*structs.ServiceNode)
tags, ok := unique[svc.ServiceName]
if !ok {
unique[svc.ServiceName] = make(map[string]struct{})
tags = unique[svc.ServiceName]
}
for _, tag := range svc.ServiceTags {
tags[tag] = struct{}{}
}
}
}
// Generate the output structure.
var results = make(structs.Services)
for service, tags := range unique {
results[service] = make([]string, 0)
for tag, _ := range tags {
results[service] = append(results[service], tag)
}
}
return idx, results, nil
}
// ServiceNodes returns the nodes associated with a given service name.
func (s *StateStore) ServiceNodes(serviceName string) (uint64, structs.ServiceNodes, error) {
tx := s.db.Txn(false)

104
consul/state/state_store_test.go
View File

@ -775,10 +775,13 @@ func TestStateStore_GetNodesByMeta(t *testing.T) {
}
// Retrieve the node with role=client
_, nodes, err := s.NodesByMeta("role", "client")
idx, nodes, err := s.NodesByMeta("role", "client")
if err != nil {
t.Fatalf("err: %s", err)
}
if idx != 1 {
t.Fatalf("bad index: %d", idx)
}
// Only one node was returned
if n := len(nodes); n != 1 {
@ -796,33 +799,14 @@ func TestStateStore_GetNodesByMeta(t *testing.T) {
t.Fatalf("bad: %v != %v", nodes[0].Meta, node0.Meta)
}
// Retrieve the node with role=server
_, nodes, err = s.NodesByMeta("role", "server")
if err != nil {
t.Fatalf("err: %s", err)
}
// Only one node was returned
if n := len(nodes); n != 1 {
t.Fatalf("bad node count: %d", n)
}
// Make sure the node is correct
if nodes[0].CreateIndex != 1 || nodes[0].ModifyIndex != 1 {
t.Fatalf("bad node index: %d, %d", nodes[0].CreateIndex, nodes[0].ModifyIndex)
}
if nodes[0].Node != "node1" {
t.Fatalf("bad: %#v", nodes[0])
}
if !reflect.DeepEqual(nodes[0].Meta, node1.Meta) {
t.Fatalf("bad: %v != %v", nodes[0].Meta, node1.Meta)
}
// Retrieve both nodes via their common meta field
_, nodes, err = s.NodesByMeta("common", "1")
idx, nodes, err = s.NodesByMeta("common", "1")
if err != nil {
t.Fatalf("err: %s", err)
}
if idx != 1 {
t.Fatalf("bad index: %d", idx)
}
// All nodes were returned
if n := len(nodes); n != 2 {
@ -1172,6 +1156,78 @@ func TestStateStore_Services(t *testing.T) {
}
}
func TestStateStore_ServicesByNodeMeta(t *testing.T) {
s := testStateStore(t)
// Listing with no results returns nil
idx, res, err := s.ServicesByNodeMeta("somekey", "somevalue")
if idx != 0 || len(res) != 0 || err != nil {
t.Fatalf("expected (0, nil, nil), got: (%d, %#v, %#v)", idx, res, err)
}
// Create some nodes and services in the state store
node0 := &structs.Node{Node: "node0", Address: "127.0.0.1", Meta: map[string]string{"role": "client", "common": "1"}}
if err := s.EnsureNode(0, node0); err != nil {
t.Fatalf("err: %v", err)
}
node1 := &structs.Node{Node: "node1", Address: "127.0.0.1", Meta: map[string]string{"role": "server", "common": "1"}}
if err := s.EnsureNode(1, node1); err != nil {
t.Fatalf("err: %v", err)
}
ns1 := &structs.NodeService{
ID: "service1",
Service: "redis",
Tags: []string{"prod", "master"},
Address: "1.1.1.1",
Port: 1111,
}
if err := s.EnsureService(2, "node0", ns1); err != nil {
t.Fatalf("err: %s", err)
}
ns2 := &structs.NodeService{
ID: "service1",
Service: "redis",
Tags: []string{"prod", "slave"},
Address: "1.1.1.1",
Port: 1111,
}
if err := s.EnsureService(3, "node1", ns2); err != nil {
t.Fatalf("err: %s", err)
}
// Filter the services by the first node's meta value
idx, res, err = s.ServicesByNodeMeta("role", "client")
if err != nil {
t.Fatalf("err: %s", err)
}
if idx != 3 {
t.Fatalf("bad index: %d", idx)
}
expected := structs.Services{
"redis": []string{"prod", "master"},
}
if !reflect.DeepEqual(res, expected) {
t.Fatalf("bad: %v %v", res, expected)
}
// Get all services using the common meta value
idx, res, err = s.ServicesByNodeMeta("common", "1")
if err != nil {
t.Fatalf("err: %s", err)
}
if idx != 3 {
t.Fatalf("bad index: %d", idx)
}
expected = structs.Services{
"redis": []string{"prod", "master", "slave"},
}
sort.Strings(res["redis"])
sort.Strings(expected["redis"])
if !reflect.DeepEqual(res, expected) {
t.Fatalf("bad: %v %v", res, expected)
}
}
func TestStateStore_ServiceNodes(t *testing.T) {
s := testStateStore(t)

4
consul/structs/structs.go
View File

@ -292,8 +292,8 @@ type Nodes []*Node
// Maps service name to available tags
type Services map[string][]string
// ServiceNode represents a node that is part of a service. Address and
// TaggedAddresses are node-related fields that are always empty in the state
// ServiceNode represents a node that is part of a service. Address, TaggedAddresses,
// and NodeMeta are node-related fields that are always empty in the state
// store and are filled in on the way out by parseServiceNodes(). This is also
// why PartialClone() skips them, because we know they are blank already so it
// would be a waste of time to copy them.

7
consul/structs/structs_test.go
View File

@ -110,12 +110,18 @@ func TestStructs_RegisterRequest_ChangesNode(t *testing.T) {
Node: "test",
Address: "127.0.0.1",
TaggedAddresses: make(map[string]string),
NodeMeta: map[string]string{
"role": "server",
},
}
node := &Node{
Node: "test",
Address: "127.0.0.1",
TaggedAddresses: make(map[string]string),
Meta: map[string]string{
"role": "server",
},
}
check := func(twiddle, restore func()) {
@ -137,6 +143,7 @@ func TestStructs_RegisterRequest_ChangesNode(t *testing.T) {
check(func() { req.Node = "nope" }, func() { req.Node = "test" })
check(func() { req.Address = "127.0.0.2" }, func() { req.Address = "127.0.0.1" })
check(func() { req.TaggedAddresses["wan"] = "nope" }, func() { delete(req.TaggedAddresses, "wan") })
check(func() { req.NodeMeta["invalid"] = "nope" }, func() { delete(req.NodeMeta, "invalid")})
if !req.ChangesNode(nil) {
t.Fatalf("should change")