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Add CLI command to get memberlist state
Add antrea agent command `antctl get memberlist` to get state of memberlist cluster of antrea agent. Fixes #4601 Signed-off-by: Kumar Atish <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,76 @@ | ||
| // Copyright 2023 Antrea Authors | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package memberlist | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "net/http" | ||
|
|
||
| v1 "k8s.io/api/core/v1" | ||
| "k8s.io/apimachinery/pkg/labels" | ||
| "k8s.io/apimachinery/pkg/util/sets" | ||
| "k8s.io/klog/v2" | ||
|
|
||
| "antrea.io/antrea/pkg/agent/querier" | ||
| ) | ||
|
|
||
| // Response describes the response struct of memberlist command. | ||
| type Response struct { | ||
| NodeName string `json:"nodeName,omitempty"` | ||
| IP string `json:"ip,omitempty"` | ||
| Status string `json:"status,omitempty"` | ||
| } | ||
|
|
||
| func generateResponse(node *v1.Node, aliveNodes sets.String) Response { | ||
| status := "Dead" | ||
| if aliveNodes.Has(node.Name) { | ||
| status = "Alive" | ||
| } | ||
| return Response{ | ||
| NodeName: node.Name, | ||
| Status: status, | ||
| IP: node.Status.Addresses[0].Address, | ||
| } | ||
| } | ||
|
|
||
| // HandleFunc returns the function which can handle queries issued by the memberlist command. | ||
| func HandleFunc(aq querier.AgentQuerier) http.HandlerFunc { | ||
| return func(w http.ResponseWriter, r *http.Request) { | ||
| var memberlist []Response | ||
| allNodes, _ := aq.GetNodeInformer().Lister().List(labels.Everything()) | ||
| aliveNodes := aq.GetAliveNodes() | ||
| for _, node := range allNodes { | ||
| memberlist = append(memberlist, generateResponse(node, aliveNodes)) | ||
| } | ||
|
|
||
| err := json.NewEncoder(w).Encode(memberlist) | ||
| if err != nil { | ||
| w.WriteHeader(http.StatusInternalServerError) | ||
| klog.Errorf("Error when encoding Memberlist to json: %v", err) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func (r Response) GetTableHeader() []string { | ||
| return []string{"NODE", "IP", "STATUS"} | ||
| } | ||
|
|
||
| func (r Response) GetTableRow(_ int) []string { | ||
| return []string{r.NodeName, r.IP, r.Status} | ||
| } | ||
|
|
||
| func (r Response) SortRows() bool { | ||
| return true | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| // Copyright 2023 Antrea Authors | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package memberlist | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "net/http" | ||
| "net/http/httptest" | ||
| "testing" | ||
|
|
||
| "github.com/golang/mock/gomock" | ||
| "github.com/stretchr/testify/assert" | ||
| "github.com/stretchr/testify/require" | ||
| v1 "k8s.io/api/core/v1" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/apimachinery/pkg/util/sets" | ||
| "k8s.io/client-go/informers" | ||
| "k8s.io/client-go/kubernetes/fake" | ||
|
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| queriertest "antrea.io/antrea/pkg/agent/querier/testing" | ||
| ) | ||
|
|
||
| var ( | ||
| node1 = v1.Node{ | ||
| ObjectMeta: metav1.ObjectMeta{Name: "node1"}, | ||
| Status: v1.NodeStatus{ | ||
| Addresses: []v1.NodeAddress{ | ||
| { | ||
| Address: "172.16.0.11", | ||
| }, | ||
| }, | ||
| }, | ||
| } | ||
|
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| expectedContent = []Response{ | ||
| { | ||
| NodeName: "node1", | ||
| IP: "172.16.0.11", | ||
| Status: "Alive", | ||
| }, | ||
| } | ||
| ) | ||
|
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| func TestMemberlistQuery(t *testing.T) { | ||
| clientset := fake.NewSimpleClientset() | ||
| informerFactory := informers.NewSharedInformerFactory(clientset, 0) | ||
| nodeInformer := informerFactory.Core().V1().Nodes() | ||
|
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| stopCh := make(chan struct{}) | ||
| defer close(stopCh) | ||
|
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| informerFactory.Start(stopCh) | ||
| informerFactory.WaitForCacheSync(stopCh) | ||
| informerFactory.Core().V1().Nodes().Informer().GetIndexer().Add(&node1) | ||
|
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| ctrl := gomock.NewController(t) | ||
| q := queriertest.NewMockAgentQuerier(ctrl) | ||
| q.EXPECT().GetNodeInformer().Return(nodeInformer) | ||
| q.EXPECT().GetAliveNodes().Return(sets.NewString("node1")) | ||
| handler := HandleFunc(q) | ||
|
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| req, err := http.NewRequest(http.MethodGet, "", nil) | ||
| require.NoError(t, err) | ||
|
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| recorder := httptest.NewRecorder() | ||
| handler.ServeHTTP(recorder, req) | ||
| assert.Equal(t, http.StatusOK, recorder.Code) | ||
|
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| var received []Response | ||
| err = json.Unmarshal(recorder.Body.Bytes(), &received) | ||
| require.NoError(t, err) | ||
| assert.Equal(t, expectedContent, received) | ||
| } |
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