prometheus/discovery/eureka/client_test.go

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// Copyright 2020 The Prometheus 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 eureka
import (
"context"
"io"
"net/http"
"net/http/httptest"
"testing"
"github.com/stretchr/testify/require"
)
func TestFetchApps(t *testing.T) {
appsXML := `<applications>
<versions__delta>1</versions__delta>
<apps__hashcode>UP_4_</apps__hashcode>
<application>
<name>CONFIG-SERVICE</name>
<instance>
<instanceId>config-service001.test.com:config-service:8080</instanceId>
<hostName>config-service001.test.com</hostName>
<app>CONFIG-SERVICE</app>
<ipAddr>192.133.83.31</ipAddr>
<status>UP</status>
<overriddenstatus>UNKNOWN</overriddenstatus>
<port enabled="true">8080</port>
<securePort enabled="false">8080</securePort>
<countryId>1</countryId>
<dataCenterInfo class="com.netflix.appinfo.InstanceInfo$DefaultDataCenterInfo">
<name>MyOwn</name>
</dataCenterInfo>
<leaseInfo>
<renewalIntervalInSecs>30</renewalIntervalInSecs>
<durationInSecs>90</durationInSecs>
<registrationTimestamp>1596003469304</registrationTimestamp>
<lastRenewalTimestamp>1596110179310</lastRenewalTimestamp>
<evictionTimestamp>0</evictionTimestamp>
<serviceUpTimestamp>1547190033103</serviceUpTimestamp>
</leaseInfo>
<metadata>
<instanceId>config-service001.test.com:config-service:8080</instanceId>
</metadata>
<homePageUrl>http://config-service001.test.com:8080/</homePageUrl>
<statusPageUrl>http://config-service001.test.com:8080/info</statusPageUrl>
<healthCheckUrl>http://config-service001.test.com 8080/health</healthCheckUrl>
<vipAddress>config-service</vipAddress>
<isCoordinatingDiscoveryServer>false</isCoordinatingDiscoveryServer>
<lastUpdatedTimestamp>1596003469304</lastUpdatedTimestamp>
<lastDirtyTimestamp>1596003469304</lastDirtyTimestamp>
<actionType>ADDED</actionType>
</instance>
<instance>
<instanceId>config-service002.test.com:config-service:8080</instanceId>
<hostName>config-service002.test.com</hostName>
<app>CONFIG-SERVICE</app>
<ipAddr>192.133.83.31</ipAddr>
<status>UP</status>
<overriddenstatus>UNKNOWN</overriddenstatus>
<port enabled="true">8080</port>
<securePort enabled="false">8080</securePort>
<countryId>1</countryId>
<dataCenterInfo class="com.netflix.appinfo.InstanceInfo$DefaultDataCenterInfo">
<name>MyOwn</name>
</dataCenterInfo>
<leaseInfo>
<renewalIntervalInSecs>30</renewalIntervalInSecs>
<durationInSecs>90</durationInSecs>
<registrationTimestamp>1596003469304</registrationTimestamp>
<lastRenewalTimestamp>1596110179310</lastRenewalTimestamp>
<evictionTimestamp>0</evictionTimestamp>
<serviceUpTimestamp>1547190033103</serviceUpTimestamp>
</leaseInfo>
<metadata>
<instanceId>config-service002.test.com:config-service:8080</instanceId>
</metadata>
<homePageUrl>http://config-service002.test.com:8080/</homePageUrl>
<statusPageUrl>http://config-service002.test.com:8080/info</statusPageUrl>
<healthCheckUrl>http://config-service002.test.com:8080/health</healthCheckUrl>
<vipAddress>config-service</vipAddress>
<isCoordinatingDiscoveryServer>false</isCoordinatingDiscoveryServer>
<lastUpdatedTimestamp>1596003469304</lastUpdatedTimestamp>
<lastDirtyTimestamp>1596003469304</lastDirtyTimestamp>
<actionType>ADDED</actionType>
</instance>
</application>
<application>
<name>META-SERVICE</name>
<instance>
<instanceId>meta-service002.test.com:meta-service:8080</instanceId>
<hostName>meta-service002.test.com</hostName>
<app>META-SERVICE</app>
<ipAddr>192.133.87.237</ipAddr>
<status>UP</status>
<overriddenstatus>UNKNOWN</overriddenstatus>
<port enabled="true">8080</port>
<securePort enabled="false">443</securePort>
<countryId>1</countryId>
<dataCenterInfo class="com.netflix.appinfo.InstanceInfo$DefaultDataCenterInfo">
<name>MyOwn</name>
</dataCenterInfo>
<leaseInfo>
<renewalIntervalInSecs>30</renewalIntervalInSecs>
<durationInSecs>90</durationInSecs>
<registrationTimestamp>1535444352472</registrationTimestamp>
<lastRenewalTimestamp>1596110168846</lastRenewalTimestamp>
<evictionTimestamp>0</evictionTimestamp>
<serviceUpTimestamp>1535444352472</serviceUpTimestamp>
</leaseInfo>
<metadata>
<project>meta-service</project>
<management.port>8090</management.port>
</metadata>
<homePageUrl>http://meta-service002.test.com:8080/</homePageUrl>
<statusPageUrl>http://meta-service002.test.com:8080/info</statusPageUrl>
<healthCheckUrl>http://meta-service002.test.com:8080/health</healthCheckUrl>
<vipAddress>meta-service</vipAddress>
<secureVipAddress>meta-service</secureVipAddress>
<isCoordinatingDiscoveryServer>false</isCoordinatingDiscoveryServer>
<lastUpdatedTimestamp>1535444352472</lastUpdatedTimestamp>
<lastDirtyTimestamp>1535444352398</lastDirtyTimestamp>
<actionType>ADDED</actionType>
</instance>
<instance>
<instanceId>meta-service001.test.com:meta-service:8080</instanceId>
<hostName>meta-service001.test.com</hostName>
<app>META-SERVICE</app>
<ipAddr>192.133.87.236</ipAddr>
<status>UP</status>
<overriddenstatus>UNKNOWN</overriddenstatus>
<port enabled="true">8080</port>
<securePort enabled="false">443</securePort>
<countryId>1</countryId>
<dataCenterInfo class="com.netflix.appinfo.InstanceInfo$DefaultDataCenterInfo">
<name>MyOwn</name>
</dataCenterInfo>
<leaseInfo>
<renewalIntervalInSecs>30</renewalIntervalInSecs>
<durationInSecs>90</durationInSecs>
<registrationTimestamp>1535444352472</registrationTimestamp>
<lastRenewalTimestamp>1596110168846</lastRenewalTimestamp>
<evictionTimestamp>0</evictionTimestamp>
<serviceUpTimestamp>1535444352472</serviceUpTimestamp>
</leaseInfo>
<metadata>
<project>meta-service</project>
<management.port>8090</management.port>
</metadata>
<homePageUrl>http://meta-service001.test.com:8080/</homePageUrl>
<statusPageUrl>http://meta-service001.test.com:8080/info</statusPageUrl>
<healthCheckUrl>http://meta-service001.test.com:8080/health</healthCheckUrl>
<vipAddress>meta-service</vipAddress>
<secureVipAddress>meta-service</secureVipAddress>
<isCoordinatingDiscoveryServer>false</isCoordinatingDiscoveryServer>
<lastUpdatedTimestamp>1535444352472</lastUpdatedTimestamp>
<lastDirtyTimestamp>1535444352398</lastDirtyTimestamp>
<actionType>ADDED</actionType>
</instance>
</application>
</applications>`
// Simulate apps with a valid XML response.
respHandler := func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusOK)
w.Header().Set("Content-Type", "application/xml")
io.WriteString(w, appsXML)
}
// Create a test server with mock HTTP handler.
ts := httptest.NewServer(http.HandlerFunc(respHandler))
defer ts.Close()
apps, err := fetchApps(context.TODO(), ts.URL, &http.Client{})
require.NoError(t, err)
require.Len(t, apps.Applications, 2)
require.Equal(t, "CONFIG-SERVICE", apps.Applications[0].Name)
require.Equal(t, "META-SERVICE", apps.Applications[1].Name)
require.Len(t, apps.Applications[1].Instances, 2)
require.Equal(t, "meta-service002.test.com:meta-service:8080", apps.Applications[1].Instances[0].InstanceID)
require.Equal(t, "project", apps.Applications[1].Instances[0].Metadata.Items[0].XMLName.Local)
require.Equal(t, "meta-service", apps.Applications[1].Instances[0].Metadata.Items[0].Content)
require.Equal(t, "management.port", apps.Applications[1].Instances[0].Metadata.Items[1].XMLName.Local)
require.Equal(t, "8090", apps.Applications[1].Instances[0].Metadata.Items[1].Content)
require.Equal(t, "meta-service001.test.com:meta-service:8080", apps.Applications[1].Instances[1].InstanceID)
}
func Test500ErrorHttpResponse(t *testing.T) {
// Simulate 500 error.
respHandler := func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusInternalServerError)
w.Header().Set("Content-Type", "application/xml")
io.WriteString(w, ``)
}
// Create a test server with mock HTTP handler.
ts := httptest.NewServer(http.HandlerFunc(respHandler))
defer ts.Close()
_, err := fetchApps(context.TODO(), ts.URL, &http.Client{})
require.Error(t, err, "5xx HTTP response")
}