Maison > Article > développement back-end > Les graphiques Helm Terratest échouent dans les tests unitaires Go
L'éditeur php Strawberry a découvert que les graphiques Helm Terratest rencontraient souvent des problèmes d'échec dans les tests unitaires Go. Terratest est une bibliothèque Go permettant d'écrire des tests d'infrastructure automatisés et reproductibles, et Helm Charts est un outil de gestion de packages pour Kubernetes. Lors de l'utilisation de Terratest pour les tests unitaires de Helm Charts, divers problèmes surviennent parfois, entraînant l'échec du test. Cet article explorera les causes de ces problèmes et fournira les solutions correspondantes pour aider les développeurs à mieux relever ces défis. Que vous soyez débutant ou développeur expérimenté, vous pouvez acquérir des connaissances et des compétences utiles grâce à cet article.
Contenu de la question
J'essaie d'utiliser terratest pour tester unitairement ma carte de barre, mais j'obtiens une erreur étrange :
package grafana import ( "fmt" "testing" corev1 "k8s.io/api/core/v1" "github.com/gruntwork-io/terratest/modules/helm" ) func testgrafanahelmcharttemplate(t *testing.t) { // path to the helm chart we will test helmchartgrafanapath := "../../../open-electrons-monitoring" // setup the args. for this test, we will set the following input values: // - image=grafana:latest options := &helm.options{ setvalues: map[string]string{"image": "grafana:latest"}, } // run rendertemplate to render the template and capture the output. output := helm.rendertemplate(t, options, helmchartgrafanapath, "pod", []string{"templates/grafana/grafana-deployment.yml"}) // now we use kubernetes/client-go library to render the template output into the pod struct. this will // ensure the pod resource is rendered correctly. var pod corev1.pod helm.unmarshalk8syaml(t, output, &pod) // finally, we verify the pod spec is set to the expected container image value expectedcontainerimage := "grafana:latest" podcontainers := pod.spec.containers fmt.print(pod.spec) fmt.print("*********************************************************") if podcontainers[0].image != expectedcontainerimage { t.fatalf("rendered container image (%s) is not expected (%s)", podcontainers[0].image, expectedcontainerimage) } }
Voici le résultat du déploiement :
testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: apiversion: apps/v1 testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: kind: deployment testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: metadata: testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: name: grafana-open-electrons-monitoring testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: namespace: open-electrons-monitoring-ns testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: labels: testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: app.kubernetes.io/name: open-electrons-grafana testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: app.kubernetes.io/component: monitoring testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: app.kubernetes.io/part-of: open-electrons-grafana testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: app.kubernetes.io/managed-by: helm testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: app.kubernetes.io/instance: open-electrons-grafana testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: app.kubernetes.io/version: refs/tags/v0.0.11 # todo: better use the grafana version testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: spec: testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: replicas: 1 testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: selector: testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: matchlabels: testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: app: open-electrons-grafana testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: strategy: testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: rollingupdate: testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: maxsurge: 1 testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: maxunavailable: 1 testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: type: rollingupdate testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: template: testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: metadata: testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: creationtimestamp: null testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: labels: testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: name: open-electrons-grafana testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: spec: testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: securitycontext: testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: runasuser: 1000 testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: runasgroup: 3000 testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: fsgroup: 2000 testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: runasnonroot: true testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: containers: testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: - image: grafana/grafana:latest testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: imagepullpolicy: ifnotpresent testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: name: open-electrons-grafana testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: ports: testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: - containerport: 3000 testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: protocol: tcp testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: resources: testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: limits: testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: memory: "1gi" testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: cpu: "1000m" testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: requests: testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: memory: 500m testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: cpu: "500m" testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: volumemounts: testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: - mountpath: /var/lib/grafana testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: name: grafana-storage testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: - mountpath: /etc/grafana/provisioning/datasources testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: name: grafana-datasources testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: readonly: false testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: restartpolicy: always testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: terminationgraceperiodseconds: 30 testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: volumes: testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: - name: grafana-storage testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: emptydir: {} testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: - name: grafana-datasources testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: configmap: testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: defaultmode: 420 testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: name: grafana-datasources {[] [] [] [] <nil> <nil> map[] <nil> false false false <nil> nil [] nil [] [] <nil> nil [] <nil> <nil> <nil> map[] [] <nil>}*********************************************************--- fail: testgrafanahelmcharttemplate (0.06s)
Voici le résultat :
panic: runtime error: index out of range [0] with length 0 [recovered] panic: runtime error: index out of range [0] with length 0 goroutine 5 [running]: testing.tRunner.func1.2({0x1440620, 0xc0002a85b8}) /usr/local/go/src/testing/testing.go:1526 +0x24e testing.tRunner.func1() /usr/local/go/src/testing/testing.go:1529 +0x39f panic({0x1440620, 0xc0002a85b8}) /usr/local/go/src/runtime/panic.go:884 +0x213
Pourquoi a-t-il échoué ? Qu'est-ce que j'oublie ici?
Solution
J'ai réussi à le réparer. L'importation devrait ressembler à ceci :
appsv1 "k8s.io/api/apps/v1"
var deployment appsv1.Deployment
Au lieu d'un objet pod.
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