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This PR adds functionality for a new antctl command: antctl get fqdncache This command fetches the DNS mapping entries for FQDN policies by reading the cache for DNS entries and outputting FQDN name, associated IP, and expiration time. It can also be used with a --domain (-d) flag that can be specified to filter the result for only a certain FQDN name. Signed-off-by: Dhruv-J <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,37 @@ | ||
| // Copyright 2025 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 fqdncache | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "net/http" | ||
|
|
||
| "k8s.io/klog/v2" | ||
|
|
||
| agentquerier "antrea.io/antrea/pkg/agent/querier" | ||
| ) | ||
|
|
||
| func HandleFunc(aq agentquerier.AgentQuerier) http.HandlerFunc { | ||
| return func(w http.ResponseWriter, r *http.Request) { | ||
| dnsEntryCache := aq.GetFqdnCache() | ||
| if dnsEntryCache == nil { | ||
| return | ||
| } | ||
| if err := json.NewEncoder(w).Encode(dnsEntryCache); err != nil { | ||
| http.Error(w, "Failed to encode response: "+err.Error(), http.StatusInternalServerError) | ||
| klog.ErrorS(err, "Failed to encode response") | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,82 @@ | ||
| // Copyright 2025 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 fqdncache | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "net" | ||
| "net/http" | ||
| "net/http/httptest" | ||
| "testing" | ||
| "time" | ||
|
|
||
| queriertest "antrea.io/antrea/pkg/agent/querier/testing" | ||
| "antrea.io/antrea/pkg/agent/types" | ||
| "github.com/stretchr/testify/assert" | ||
| "github.com/stretchr/testify/require" | ||
| "go.uber.org/mock/gomock" | ||
| ) | ||
|
|
||
| func TestFqdnCacheQuery(t *testing.T) { | ||
| tests := []struct { | ||
| name string | ||
| expectedStatus int | ||
| expectedResponse []types.DnsCacheEntry | ||
| }{ | ||
| { | ||
| name: "FQDN cache exists", | ||
| expectedStatus: http.StatusOK, | ||
| expectedResponse: []types.DnsCacheEntry{ | ||
| { | ||
| FqdnName: "google.com", | ||
| IpAddress: net.ParseIP("10.0.0.1"), | ||
| ExpirationTime: time.Date(2025, 12, 25, 15, 0, 0, 0, time.UTC), | ||
| }, | ||
| }, | ||
| }, | ||
| { | ||
| name: "FQDN cache does not exist", | ||
| expectedStatus: http.StatusOK, | ||
| expectedResponse: []types.DnsCacheEntry{}, | ||
| }, | ||
| } | ||
| for _, tt := range tests { | ||
| t.Run(tt.name, func(t *testing.T) { | ||
| ctrl := gomock.NewController(t) | ||
| q := queriertest.NewMockAgentQuerier(ctrl) | ||
| q.EXPECT().GetFqdnCache().Return(tt.expectedResponse) | ||
| handler := HandleFunc(q) | ||
| req, err := http.NewRequest(http.MethodGet, "", nil) | ||
| require.NoError(t, err) | ||
| recorder := httptest.NewRecorder() | ||
| handler.ServeHTTP(recorder, req) | ||
| assert.Equal(t, tt.expectedStatus, recorder.Code) | ||
| if tt.expectedStatus == http.StatusOK { | ||
| var received []map[string]interface{} | ||
| err = json.Unmarshal(recorder.Body.Bytes(), &received) | ||
| require.NoError(t, err) | ||
| if len(received) > 0 { | ||
| parsedTime, err := time.Parse(time.RFC3339, received[0]["expirationTime"].(string)) | ||
| require.NoError(t, err) | ||
| assert.Equal(t, tt.expectedResponse, []types.DnsCacheEntry{{ | ||
| FqdnName: received[0]["fqdnName"].(string), | ||
| IpAddress: net.ParseIP(received[0]["ipAddress"].(string)), | ||
| ExpirationTime: parsedTime, | ||
| }}) | ||
| } | ||
| } | ||
| }) | ||
| } | ||
| } |
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