e2e: Add test for concurrent VM creation

e2e/zconcurrent_vm_test.go

@@ -0,0 +1,49 @@
+package e2e
+
+import (
+	"strconv"
+	"testing"
+
+	"github.com/weaveworks/ignite/e2e/util"
+	"gotest.tools/assert"
+)
+
+func TestConcurrentVMCreation(t *testing.T) {
+	assert.Assert(t, e2eHome != "", "IGNITE_E2E_HOME should be set")
+
+	igniteCmd := util.NewCommand(t, igniteBin)
+
+	numberOfVMs := 4
+	vmNames := []string{}
+	cmds := []*util.Command{}
+
+	// Create VM names and VM run commands to execute.
+	for i := 1; i <= numberOfVMs; i++ {
+		name := "e2e-test-concurrent-vm-create-" + strconv.Itoa(i)
+		vmNames = append(vmNames, name)
+		cmds = append(
+			cmds,
+			util.NewCommand(t, igniteBin).
+				With("run").
+				With("--name="+name).
+				With("--ssh").
+				With(util.DefaultVMImage),
+		)
+	}
+
+	// Clean-up the VMs.
+	defer igniteCmd.New().
+		With("rm", "-f").
+		With(vmNames...).
+		Run()
+
+	// Run VMs.
+	for _, cmd := range cmds {
+		assert.Check(t, cmd.Cmd.Start(), "failed to run VM")
+	}
+
+	// Wait for all the commands to finish.
+	for _, cmd := range cmds {
+		assert.Check(t, cmd.Cmd.Wait(), "error waiting for the command to finish")
+	}
+}