ca: reduce consul provider backend interface a bit

This makes it easier to fake, which will allow me to use the ConsulProvider as
an 'external PKI' to test a customer setup where the actual root CA is not
the root we use for the Consul CA.

Replaces a call to the state store to fetch the clusterID with the
clusterID field already available on the built-in provider.

agent/connect/ca/provider_consul.go

@@ -17,7 +17,6 @@ import (
 	"github.com/hashicorp/go-hclog"
 
 	"github.com/hashicorp/consul/agent/connect"
-	"github.com/hashicorp/consul/agent/consul/state"
 	"github.com/hashicorp/consul/agent/structs"
 )
 
@@ -56,7 +55,7 @@ func NewConsulProvider(delegate ConsulProviderStateDelegate, logger hclog.Logger
 }
 
 type ConsulProviderStateDelegate interface {
-	State() *state.Store
+	ProviderState(id string) (*structs.CAConsulProviderState, error)
 	ApplyCARequest(*structs.CARequest) (interface{}, error)
 }
 
@@ -82,7 +81,7 @@ func (c *ConsulProvider) Configure(cfg ProviderConfig) error {
 	c.parseTestState(cfg.RawConfig, cfg.State)
 
 	// Exit early if the state store has an entry for this provider's config.
-	_, providerState, err := c.Delegate.State().CAProviderState(c.id)
+	providerState, err := c.Delegate.ProviderState(c.id)
 	if err != nil {
 		return err
 	}
@@ -98,7 +97,7 @@ func (c *ConsulProvider) Configure(cfg ProviderConfig) error {
 
 	// Check if there are any entries with old ID schemes.
 	for _, oldID := range oldIDs {
-		_, providerState, err = c.Delegate.State().CAProviderState(oldID)
+		providerState, err = c.Delegate.ProviderState(oldID)
 		if err != nil {
 			return err
 		}
@@ -589,8 +588,7 @@ func (c *ConsulProvider) SupportsCrossSigning() (bool, error) {
 // getState returns the current provider state from the state delegate, and returns
 // ErrNotInitialized if no entry is found.
 func (c *ConsulProvider) getState() (*structs.CAConsulProviderState, error) {
-	stateStore := c.Delegate.State()
-	_, providerState, err := stateStore.CAProviderState(c.id)
+	providerState, err := c.Delegate.ProviderState(c.id)
 	if err != nil {
 		return nil, err
 	}

agent/connect/ca/provider_consul_test.go

@@ -17,8 +17,9 @@ type consulCAMockDelegate struct {
 	state *state.Store
 }
 
-func (c *consulCAMockDelegate) State() *state.Store {
-	return c.state
+func (c *consulCAMockDelegate) ProviderState(id string) (*structs.CAConsulProviderState, error) {
+	_, s, err := c.state.CAProviderState(id)
+	return s, err
 }
 
 func (c *consulCAMockDelegate) ApplyCARequest(req *structs.CARequest) (interface{}, error) {

agent/connect/ca/provider_vault.go

@@ -246,7 +246,6 @@ func (v *VaultProvider) GenerateRoot() error {
 				DefaultLeaseTTL: v.config.RootCertTTL.String(),
 			},
 		})
-
 		if err != nil {
 			return err
 		}

agent/connect/ca/testing.go

@@ -168,8 +168,11 @@ func runTestVault(t testing.T) (*TestVaultServer, error) {
 		returnPortsFn: returnPortsFn,
 	}
 	t.Cleanup(func() {
-		testVault.Stop()
+		if err := testVault.Stop(); err != nil {
+			t.Log("failed to stop vault server: %w", err)
+		}
 	})
+
 	return testVault, nil
 }
 

agent/consul/leader_connect_ca.go

@@ -38,6 +38,8 @@ const (
 // easier testing.
 type caServerDelegate interface {
 	ca.ConsulProviderStateDelegate
+
+	State() *state.Store
 	IsLeader() bool
 	ApplyCALeafRequest() (uint64, error)
 
@@ -138,6 +140,11 @@ func (c *caDelegateWithState) ServersSupportMultiDCConnectCA() error {
 	return nil
 }
 
+func (c *caDelegateWithState) ProviderState(id string) (*structs.CAConsulProviderState, error) {
+	_, s, err := c.fsm.State().CAProviderState(id)
+	return s, err
+}
+
 func NewCAManager(delegate caServerDelegate, leaderRoutineManager *routine.Manager, logger hclog.Logger, config *Config) *CAManager {
 	return &CAManager{
 		delegate:             delegate,

agent/consul/leader_connect_ca_test.go

@@ -53,6 +53,11 @@ func (m *mockCAServerDelegate) State() *state.Store {
 	return m.store
 }
 
+func (m *mockCAServerDelegate) ProviderState(id string) (*structs.CAConsulProviderState, error) {
+	_, s, err := m.store.CAProviderState(id)
+	return s, err
+}
+
 func (m *mockCAServerDelegate) IsLeader() bool {
 	return true
 }

agent/consul/server.go

@@ -472,7 +472,7 @@ func NewServer(config *Config, flat Deps) (*Server, error) {
 		return nil, fmt.Errorf("Failed to start Raft: %v", err)
 	}
 
-	s.caManager = NewCAManager(&caDelegateWithState{s}, s.leaderRoutineManager, s.logger.ResetNamed("connect.ca"), s.config)
+	s.caManager = NewCAManager(&caDelegateWithState{Server: s}, s.leaderRoutineManager, s.logger.ResetNamed("connect.ca"), s.config)
 	if s.config.ConnectEnabled && (s.config.AutoEncryptAllowTLS || s.config.AutoConfigAuthzEnabled) {
 		go s.connectCARootsMonitor(&lib.StopChannelContext{StopCh: s.shutdownCh})
 	}