test infrastructure for mock client RPCs (#10193)
This commit includes a new test client that allows overriding the RPC protocols. Only the RPCs that are passed in are registered, which lets you implement a mock RPC in the server tests. This commit includes an example of this for the ClientCSI RPC server.
This commit is contained in:
Tim Gross
parent
d97401f60e
commit
43622680fa
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@ -308,8 +308,12 @@ var (
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noServersErr = errors.New("no servers")
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)
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// NewClient is used to create a new client from the given configuration
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func NewClient(cfg *config.Config, consulCatalog consul.CatalogAPI, consulProxies consulApi.SupportedProxiesAPI, consulService consulApi.ConsulServiceAPI) (*Client, error) {
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// NewClient is used to create a new client from the given configuration.
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// `rpcs` is a map of RPC names to RPC structs that, if non-nil, will be
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// registered via https://golang.org/pkg/net/rpc/#Server.RegisterName in place
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// of the client's normal RPC handlers. This allows server tests to override
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// the behavior of the client.
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func NewClient(cfg *config.Config, consulCatalog consul.CatalogAPI, consulProxies consulApi.SupportedProxiesAPI, consulService consulApi.ConsulServiceAPI, rpcs map[string]interface{}) (*Client, error) {
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// Create the tls wrapper
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var tlsWrap tlsutil.RegionWrapper
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if cfg.TLSConfig.EnableRPC {
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@ -384,7 +388,7 @@ func NewClient(cfg *config.Config, consulCatalog consul.CatalogAPI, consulProxie
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})
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// Setup the clients RPC server
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c.setupClientRpc()
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c.setupClientRpc(rpcs)
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// Initialize the ACL state
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if err := c.clientACLResolver.init(); err != nil {
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@ -622,7 +622,7 @@ func TestClient_SaveRestoreState(t *testing.T) {
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c1.config.PluginLoader = catalog.TestPluginLoaderWithOptions(t, "", c1.config.Options, nil)
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c1.config.PluginSingletonLoader = singleton.NewSingletonLoader(logger, c1.config.PluginLoader)
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c2, err := NewClient(c1.config, consulCatalog, nil, mockService)
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c2, err := NewClient(c1.config, consulCatalog, nil, mockService, nil)
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if err != nil {
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t.Fatalf("err: %v", err)
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}
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@ -245,19 +245,24 @@ func (c *Client) streamingRpcConn(server *servers.Server, method string) (net.Co
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}
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// setupClientRpc is used to setup the Client's RPC endpoints
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func (c *Client) setupClientRpc() {
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func (c *Client) setupClientRpc(rpcs map[string]interface{}) {
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// Create the RPC Server
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c.rpcServer = rpc.NewServer()
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// Initialize the RPC handlers
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if rpcs != nil {
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// override RPCs
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for name, rpc := range rpcs {
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c.rpcServer.RegisterName(name, rpc)
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}
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} else {
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c.endpoints.ClientStats = &ClientStats{c}
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c.endpoints.CSI = &CSI{c}
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c.endpoints.FileSystem = NewFileSystemEndpoint(c)
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c.endpoints.Allocations = NewAllocationsEndpoint(c)
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c.endpoints.Agent = NewAgentEndpoint(c)
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// Create the RPC Server
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c.rpcServer = rpc.NewServer()
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// Register the endpoints with the RPC server
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c.setupClientRpcServer(c.rpcServer)
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}
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go c.rpcConnListener()
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}
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@ -2,14 +2,18 @@ package client
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import (
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"fmt"
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"net"
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"net/rpc"
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"time"
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"github.com/hashicorp/nomad/client/config"
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consulapi "github.com/hashicorp/nomad/client/consul"
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"github.com/hashicorp/nomad/client/fingerprint"
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"github.com/hashicorp/nomad/client/servers"
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agentconsul "github.com/hashicorp/nomad/command/agent/consul"
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"github.com/hashicorp/nomad/helper/pluginutils/catalog"
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"github.com/hashicorp/nomad/helper/pluginutils/singleton"
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"github.com/hashicorp/nomad/helper/pool"
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"github.com/hashicorp/nomad/helper/testlog"
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testing "github.com/mitchellh/go-testing-interface"
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)
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@ -21,6 +25,10 @@ import (
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// and removed in the returned cleanup function. If they are overridden in the
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// callback then the caller still must run the returned cleanup func.
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func TestClient(t testing.T, cb func(c *config.Config)) (*Client, func() error) {
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return TestClientWithRPCs(t, cb, nil)
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}
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func TestClientWithRPCs(t testing.T, cb func(c *config.Config), rpcs map[string]interface{}) (*Client, func() error) {
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conf, cleanup := config.TestClientConfig(t)
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// Tighten the fingerprinter timeouts (must be done in client package
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@ -46,7 +54,7 @@ func TestClient(t testing.T, cb func(c *config.Config)) (*Client, func() error)
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}
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mockCatalog := agentconsul.NewMockCatalog(logger)
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mockService := consulapi.NewMockConsulServiceClient(t, logger)
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client, err := NewClient(conf, mockCatalog, nil, mockService)
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client, err := NewClient(conf, mockCatalog, nil, mockService, rpcs)
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if err != nil {
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cleanup()
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t.Fatalf("err: %v", err)
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@ -75,3 +83,51 @@ func TestClient(t testing.T, cb func(c *config.Config)) (*Client, func() error)
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}
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}
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}
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// TestRPCOnlyClient is a client that only pings to establish a connection
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// with the server and then returns mock RPC responses for those interfaces
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// passed in the `rpcs` parameter. Useful for testing client RPCs from the
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// server. Returns the Client, a shutdown function, and any error.
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func TestRPCOnlyClient(t testing.T, srvAddr net.Addr, rpcs map[string]interface{}) (*Client, func() error, error) {
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var err error
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conf, cleanup := config.TestClientConfig(t)
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client := &Client{config: conf, logger: testlog.HCLogger(t)}
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client.servers = servers.New(client.logger, client.shutdownCh, client)
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client.configCopy = client.config.Copy()
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client.rpcServer = rpc.NewServer()
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for name, rpc := range rpcs {
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client.rpcServer.RegisterName(name, rpc)
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}
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client.connPool = pool.NewPool(testlog.HCLogger(t), 10*time.Second, 10, nil)
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cancelFunc := func() error {
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ch := make(chan error)
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go func() {
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defer close(ch)
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client.connPool.Shutdown()
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client.shutdownGroup.Wait()
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cleanup()
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}()
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select {
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case <-ch:
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return nil
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case <-time.After(1 * time.Minute):
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return fmt.Errorf("timed out while shutting down client")
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}
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}
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go client.rpcConnListener()
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_, err = client.SetServers([]string{srvAddr.String()})
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if err != nil {
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return nil, cancelFunc, fmt.Errorf("could not set servers: %v", err)
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}
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client.shutdownGroup.Go(client.registerAndHeartbeat)
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return client, cancelFunc, nil
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}
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@ -861,7 +861,8 @@ func (a *Agent) setupClient() error {
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conf.StateDBFactory = state.GetStateDBFactory(conf.DevMode)
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}
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nomadClient, err := client.NewClient(conf, a.consulCatalog, a.consulProxies, a.consulService)
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nomadClient, err := client.NewClient(
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conf, a.consulCatalog, a.consulProxies, a.consulService, nil)
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if err != nil {
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return fmt.Errorf("client setup failed: %v", err)
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}
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@ -18,6 +18,42 @@ import (
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"github.com/stretchr/testify/require"
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)
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// MockClientCSI is a mock for the nomad.ClientCSI RPC server (see
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// nomad/client_csi_endpoint.go). This can be used with a TestRPCOnlyClient to
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// return specific plugin responses back to server RPCs for testing. Note that
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// responses that have no bodies have no "Next*Response" field and will always
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// return an empty response body.
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type MockClientCSI struct {
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NextValidateError error
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NextAttachError error
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NextAttachResponse *cstructs.ClientCSIControllerAttachVolumeResponse
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NextDetachError error
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NextNodeDetachError error
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}
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func newMockClientCSI() *MockClientCSI {
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return &MockClientCSI{
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NextAttachResponse: &cstructs.ClientCSIControllerAttachVolumeResponse{},
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}
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}
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func (c *MockClientCSI) ControllerValidateVolume(req *cstructs.ClientCSIControllerValidateVolumeRequest, resp *cstructs.ClientCSIControllerValidateVolumeResponse) error {
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return c.NextValidateError
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}
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func (c *MockClientCSI) ControllerAttachVolume(req *cstructs.ClientCSIControllerAttachVolumeRequest, resp *cstructs.ClientCSIControllerAttachVolumeResponse) error {
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*resp = *c.NextAttachResponse
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return c.NextAttachError
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}
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func (c *MockClientCSI) ControllerDetachVolume(req *cstructs.ClientCSIControllerDetachVolumeRequest, resp *cstructs.ClientCSIControllerDetachVolumeResponse) error {
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return c.NextDetachError
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}
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func (c *MockClientCSI) NodeDetachVolume(req *cstructs.ClientCSINodeDetachVolumeRequest, resp *cstructs.ClientCSINodeDetachVolumeResponse) error {
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return c.NextNodeDetachError
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}
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func TestClientCSIController_AttachVolume_Local(t *testing.T) {
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t.Parallel()
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require := require.New(t)
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@ -30,7 +66,7 @@ func TestClientCSIController_AttachVolume_Local(t *testing.T) {
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var resp structs.GenericResponse
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err := msgpackrpc.CallWithCodec(codec, "ClientCSI.ControllerAttachVolume", req, &resp)
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require.NotNil(err)
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require.Error(err)
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require.Contains(err.Error(), "no plugins registered for type")
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}
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var resp structs.GenericResponse
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err := msgpackrpc.CallWithCodec(codec, "ClientCSI.ControllerAttachVolume", req, &resp)
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require.NotNil(err)
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require.Error(err)
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require.Contains(err.Error(), "no plugins registered for type")
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}
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@ -62,7 +98,7 @@ func TestClientCSIController_DetachVolume_Local(t *testing.T) {
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var resp structs.GenericResponse
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err := msgpackrpc.CallWithCodec(codec, "ClientCSI.ControllerDetachVolume", req, &resp)
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require.NotNil(err)
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require.Error(err)
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require.Contains(err.Error(), "no plugins registered for type")
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}
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@ -78,7 +114,7 @@ func TestClientCSIController_DetachVolume_Forwarded(t *testing.T) {
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var resp structs.GenericResponse
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err := msgpackrpc.CallWithCodec(codec, "ClientCSI.ControllerDetachVolume", req, &resp)
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require.NotNil(err)
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require.Error(err)
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require.Contains(err.Error(), "no plugins registered for type")
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}
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@ -95,7 +131,7 @@ func TestClientCSIController_ValidateVolume_Local(t *testing.T) {
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var resp structs.GenericResponse
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err := msgpackrpc.CallWithCodec(codec, "ClientCSI.ControllerValidateVolume", req, &resp)
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require.NotNil(err)
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require.Error(err)
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require.Contains(err.Error(), "no plugins registered for type")
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}
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@ -112,7 +148,7 @@ func TestClientCSIController_ValidateVolume_Forwarded(t *testing.T) {
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var resp structs.GenericResponse
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err := msgpackrpc.CallWithCodec(codec, "ClientCSI.ControllerValidateVolume", req, &resp)
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require.NotNil(err)
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require.Error(err)
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require.Contains(err.Error(), "no plugins registered for type")
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}
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@ -163,9 +199,12 @@ func TestClientCSI_NodeForControllerPlugin(t *testing.T) {
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// returns a RPC client to the leader and a cleanup function.
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func setupForward(t *testing.T) (rpc.ClientCodec, func()) {
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s1, cleanupS1 := TestServer(t, func(c *Config) { c.BootstrapExpect = 1 })
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s1, cleanupS1 := TestServer(t, func(c *Config) { c.BootstrapExpect = 2 })
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s2, cleanupS2 := TestServer(t, func(c *Config) { c.BootstrapExpect = 2 })
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TestJoin(t, s1, s2)
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testutil.WaitForLeader(t, s1.RPC)
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testutil.WaitForLeader(t, s2.RPC)
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codec := rpcClient(t, s1)
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c1, cleanupC1 := client.TestClient(t, func(c *config.Config) {
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@ -176,24 +215,22 @@ func setupForward(t *testing.T) (rpc.ClientCodec, func()) {
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select {
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case <-c1.Ready():
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case <-time.After(10 * time.Second):
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cleanupS1()
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cleanupC1()
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cleanupS1()
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cleanupS2()
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t.Fatal("client timedout on initialize")
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}
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waitForNodes(t, s1, 1, 1)
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s2, cleanupS2 := TestServer(t, func(c *Config) { c.BootstrapExpect = 2 })
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TestJoin(t, s1, s2)
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c2, cleanupC2 := client.TestClient(t, func(c *config.Config) {
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c.Servers = []string{s2.config.RPCAddr.String()}
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})
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select {
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case <-c2.Ready():
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case <-time.After(10 * time.Second):
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cleanupS1()
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cleanupC1()
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cleanupC2()
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cleanupS1()
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cleanupS2()
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t.Fatal("client timedout on initialize")
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}
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@ -224,10 +261,10 @@ func setupForward(t *testing.T) (rpc.ClientCodec, func()) {
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s1.fsm.state.UpsertNode(structs.MsgTypeTestSetup, 1000, node1)
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cleanup := func() {
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cleanupS1()
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cleanupC1()
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cleanupS2()
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cleanupC2()
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cleanupS2()
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cleanupS1()
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}
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return codec, cleanup
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@ -235,23 +272,43 @@ func setupForward(t *testing.T) (rpc.ClientCodec, func()) {
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// sets up a single server with a client, and registers a plugin to the client.
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func setupLocal(t *testing.T) (rpc.ClientCodec, func()) {
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var err error
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s1, cleanupS1 := TestServer(t, func(c *Config) { c.BootstrapExpect = 1 })
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testutil.WaitForLeader(t, s1.RPC)
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codec := rpcClient(t, s1)
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c1, cleanupC1 := client.TestClient(t, func(c *config.Config) {
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c.Servers = []string{s1.config.RPCAddr.String()}
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})
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mockCSI := newMockClientCSI()
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mockCSI.NextValidateError = fmt.Errorf("no plugins registered for type")
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mockCSI.NextAttachError = fmt.Errorf("no plugins registered for type")
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mockCSI.NextDetachError = fmt.Errorf("no plugins registered for type")
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// Wait for client initialization
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select {
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case <-c1.Ready():
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case <-time.After(10 * time.Second):
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cleanupS1()
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c1, cleanupC1 := client.TestClientWithRPCs(t,
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func(c *config.Config) {
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c.Servers = []string{s1.config.RPCAddr.String()}
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},
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map[string]interface{}{"CSI": mockCSI},
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)
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if err != nil {
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cleanupC1()
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t.Fatal("client timedout on initialize")
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cleanupS1()
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require.NoError(t, err, "could not setup test client")
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}
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node1 := c1.Node()
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node1.Attributes["nomad.version"] = "0.11.0" // client RPCs not supported on early versions
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req := &structs.NodeRegisterRequest{
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Node: node1,
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WriteRequest: structs.WriteRequest{Region: "global"},
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}
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var resp structs.NodeUpdateResponse
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err = c1.RPC("Node.Register", req, &resp)
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if err != nil {
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cleanupC1()
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cleanupS1()
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require.NoError(t, err, "could not register client node")
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}
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waitForNodes(t, s1, 1, 1)
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@ -266,15 +323,12 @@ func setupLocal(t *testing.T) (rpc.ClientCodec, func()) {
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}
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// update w/ plugin
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node1 := c1.Node()
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node1.Attributes["nomad.version"] = "0.11.0" // client RPCs not supported on early versions
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node1.CSIControllerPlugins = plugins
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s1.fsm.state.UpsertNode(structs.MsgTypeTestSetup, 1000, node1)
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cleanup := func() {
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cleanupS1()
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cleanupC1()
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cleanupS1()
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}
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return codec, cleanup
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