78 lines
2.0 KiB
Go
78 lines
2.0 KiB
Go
// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: MPL-2.0
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package servicediscovery
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import (
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"context"
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"fmt"
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"strings"
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"testing"
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"github.com/hashicorp/nomad/api"
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"github.com/hashicorp/nomad/e2e/e2eutil"
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"github.com/hashicorp/nomad/helper/uuid"
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"github.com/shoenig/test/must"
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)
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func testSimpleLoadBalancing(t *testing.T) {
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nomadClient := e2eutil.NomadClient(t)
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// Generate our unique job ID which will be used for this test.
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jobID := "nsd-simple-lb-replicas-" + uuid.Short()
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jobIDs := []string{jobID}
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// Defer a cleanup function to remove the job. This will trigger if the
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// test fails, unless the cancel function is called.
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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defer e2eutil.CleanupJobsAndGCWithContext(t, ctx, &jobIDs)
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// Register the replicas job.
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allocStubs := e2eutil.RegisterAndWaitForAllocs(t, nomadClient, jobSimpleLBReplicas, jobID, "")
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must.Len(t, 3, allocStubs)
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for _, stub := range allocStubs {
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var tag string
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switch stub.TaskGroup {
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case "db_replica_1":
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tag = "r1"
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case "db_replica_2":
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tag = "r2"
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case "db_replica_3":
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tag = "r3"
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}
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expectService := api.ServiceRegistration{
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ServiceName: "db",
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Namespace: api.DefaultNamespace,
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Datacenter: "dc1",
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JobID: jobID,
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AllocID: stub.ID,
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Tags: []string{tag},
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}
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filter := fmt.Sprintf("Tags contains %q", tag)
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requireEventuallyNomadService(t, &expectService, filter)
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}
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jobID2 := "nsd-simple-lb-clients" + uuid.Short()
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jobIDs = append(jobIDs, jobID2)
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// Register the clients job.
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allocStubs = e2eutil.RegisterAndWaitForAllocs(t, nomadClient, jobSimpleLBClients, jobID2, "")
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must.Len(t, 2, allocStubs)
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for _, stub := range allocStubs {
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var expCount int
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switch stub.TaskGroup {
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case "client_1":
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expCount = 1
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case "client_2":
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expCount = 2
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}
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must.NoError(t, e2eutil.WaitForAllocFile(stub.ID, "cat/output.txt", func(content string) bool {
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count := strings.Count(content, "server ")
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return count == expCount
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}, nil))
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}
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}
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