feat: kubesphere 4.0 (#6115)

* feat: kubesphere 4.0

Signed-off-by: ci-bot <ci-bot@kubesphere.io>

* feat: kubesphere 4.0

Signed-off-by: ci-bot <ci-bot@kubesphere.io>

---------

Signed-off-by: ci-bot <ci-bot@kubesphere.io>
Co-authored-by: ks-ci-bot <ks-ci-bot@example.com>
Co-authored-by: joyceliu <joyceliu@yunify.com>

vendor/google.golang.org/grpc/resolver/manual/manual.go

@@ -26,13 +26,16 @@ import (
 	"google.golang.org/grpc/resolver"
 )
 
-// NewBuilderWithScheme creates a new test resolver builder with the given scheme.
+// NewBuilderWithScheme creates a new manual resolver builder with the given
+// scheme. Every instance of the manual resolver may only ever be used with a
+// single grpc.ClientConn. Otherwise, bad things will happen.
 func NewBuilderWithScheme(scheme string) *Resolver {
 	return &Resolver{
-		BuildCallback:      func(resolver.Target, resolver.ClientConn, resolver.BuildOptions) {},
-		ResolveNowCallback: func(resolver.ResolveNowOptions) {},
-		CloseCallback:      func() {},
-		scheme:             scheme,
+		BuildCallback:       func(resolver.Target, resolver.ClientConn, resolver.BuildOptions) {},
+		UpdateStateCallback: func(error) {},
+		ResolveNowCallback:  func(resolver.ResolveNowOptions) {},
+		CloseCallback:       func() {},
+		scheme:              scheme,
 	}
 }
 
@@ -42,6 +45,11 @@ type Resolver struct {
 	// BuildCallback is called when the Build method is called.  Must not be
 	// nil.  Must not be changed after the resolver may be built.
 	BuildCallback func(resolver.Target, resolver.ClientConn, resolver.BuildOptions)
+	// UpdateStateCallback is called when the UpdateState method is called on
+	// the resolver.  The value passed as argument to this callback is the value
+	// returned by the resolver.ClientConn.  Must not be nil.  Must not be
+	// changed after the resolver may be built.
+	UpdateStateCallback func(err error)
 	// ResolveNowCallback is called when the ResolveNow method is called on the
 	// resolver.  Must not be nil.  Must not be changed after the resolver may
 	// be built.
@@ -52,30 +60,34 @@ type Resolver struct {
 	scheme        string
 
 	// Fields actually belong to the resolver.
-	mu             sync.Mutex // Guards access to CC.
-	CC             resolver.ClientConn
-	bootstrapState *resolver.State
+	// Guards access to below fields.
+	mu sync.Mutex
+	CC resolver.ClientConn
+	// Storing the most recent state update makes this resolver resilient to
+	// restarts, which is possible with channel idleness.
+	lastSeenState *resolver.State
 }
 
 // InitialState adds initial state to the resolver so that UpdateState doesn't
 // need to be explicitly called after Dial.
 func (r *Resolver) InitialState(s resolver.State) {
-	r.bootstrapState = &s
+	r.lastSeenState = &s
 }
 
 // Build returns itself for Resolver, because it's both a builder and a resolver.
 func (r *Resolver) Build(target resolver.Target, cc resolver.ClientConn, opts resolver.BuildOptions) (resolver.Resolver, error) {
-	r.mu.Lock()
-	r.CC = cc
-	r.mu.Unlock()
 	r.BuildCallback(target, cc, opts)
-	if r.bootstrapState != nil {
-		r.UpdateState(*r.bootstrapState)
+	r.mu.Lock()
+	defer r.mu.Unlock()
+	r.CC = cc
+	if r.lastSeenState != nil {
+		err := r.CC.UpdateState(*r.lastSeenState)
+		go r.UpdateStateCallback(err)
 	}
 	return r, nil
 }
 
-// Scheme returns the test scheme.
+// Scheme returns the manual resolver's scheme.
 func (r *Resolver) Scheme() string {
 	return r.scheme
 }
@@ -93,13 +105,22 @@ func (r *Resolver) Close() {
 // UpdateState calls CC.UpdateState.
 func (r *Resolver) UpdateState(s resolver.State) {
 	r.mu.Lock()
-	r.CC.UpdateState(s)
-	r.mu.Unlock()
+	defer r.mu.Unlock()
+	var err error
+	if r.CC == nil {
+		panic("cannot update state as grpc.Dial with resolver has not been called")
+	}
+	err = r.CC.UpdateState(s)
+	r.lastSeenState = &s
+	r.UpdateStateCallback(err)
 }
 
 // ReportError calls CC.ReportError.
 func (r *Resolver) ReportError(err error) {
 	r.mu.Lock()
+	defer r.mu.Unlock()
+	if r.CC == nil {
+		panic("cannot report error as grpc.Dial with resolver has not been called")
+	}
 	r.CC.ReportError(err)
-	r.mu.Unlock()
 }