integration/docker: read default number of vCPUs from config file

Gopkg.toml

@@ -40,3 +40,7 @@
 [[constraint]]
   name = "github.com/opencontainers/specs"
   version = "1.0.1"
+
+[[constraint]]
+  name = "github.com/BurntSushi/toml"
+  revision = "a368813c5e648fee92e5f6c30e3944ff9d5e8895"

config.go

@@ -0,0 +1,96 @@
+// Copyright (c) 2018 Intel Corporation
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package tests
+
+import (
+	"io/ioutil"
+
+	"github.com/BurntSushi/toml"
+)
+
+// RuntimeConfig is the runtime configuration
+type RuntimeConfig struct {
+	Hypervisor map[string]hypervisor
+	Proxy      map[string]proxy
+	Shim       map[string]shim
+	Agent      map[string]agent
+	Runtime    runtime
+}
+
+type hypervisor struct {
+	Path                  string `toml:"path"`
+	Kernel                string `toml:"kernel"`
+	Initrd                string `toml:"initrd"`
+	Image                 string `toml:"image"`
+	Firmware              string `toml:"firmware"`
+	MachineAccelerators   string `toml:"machine_accelerators"`
+	KernelParams          string `toml:"kernel_params"`
+	MachineType           string `toml:"machine_type"`
+	DefaultVCPUs          int32  `toml:"default_vcpus"`
+	DefaultMaxVCPUs       uint32 `toml:"default_maxvcpus"`
+	DefaultMemSz          uint32 `toml:"default_memory"`
+	DefaultBridges        uint32 `toml:"default_bridges"`
+	Msize9p               uint32 `toml:"msize_9p"`
+	BlockDeviceDriver     string `toml:"block_device_driver"`
+	DisableBlockDeviceUse bool   `toml:"disable_block_device_use"`
+	MemPrealloc           bool   `toml:"enable_mem_prealloc"`
+	HugePages             bool   `toml:"enable_hugepages"`
+	Swap                  bool   `toml:"enable_swap"`
+	Debug                 bool   `toml:"enable_debug"`
+	DisableNestingChecks  bool   `toml:"disable_nesting_checks"`
+	EnableIOThreads       bool   `toml:"enable_iothreads"`
+}
+
+type proxy struct {
+	Path  string `toml:"path"`
+	Debug bool   `toml:"enable_debug"`
+}
+
+type runtime struct {
+	Debug             bool   `toml:"enable_debug"`
+	InterNetworkModel string `toml:"internetworking_model"`
+}
+
+type shim struct {
+	Path  string `toml:"path"`
+	Debug bool   `toml:"enable_debug"`
+}
+
+type agent struct {
+}
+
+const (
+	// DefaultHypervisor default hypervisor
+	DefaultHypervisor = "qemu"
+
+	// DefaultProxy default proxy
+	DefaultProxy = "kata"
+
+	// DefaultAgent default agent
+	DefaultAgent = "kata"
+
+	// DefaultShim default shim
+	DefaultShim = "kata"
+
+	// DefaultRuntimeConfigPath is the default path to the runtime configuration file
+	DefaultRuntimeConfigPath = "/usr/share/defaults/kata-containers/configuration.toml"
+)
+
+// LoadRuntimeConfiguration loads runtime configuration
+func LoadRuntimeConfiguration(configPath string) (RuntimeConfig, error) {
+	var config RuntimeConfig
+	configData, err := ioutil.ReadFile(configPath)
+	if err != nil {
+		return config, err
+	}
+
+	_, err = toml.Decode(string(configData), &config)
+	if err != nil {
+		return config, err
+	}
+
+	return config, err
+}

integration/docker/cpu_test.go

@@ -7,7 +7,6 @@ package docker
 import (
 	"fmt"
 	"math"
-	"strconv"
 	"strings"
 
 	. "github.com/kata-containers/tests"
@@ -16,24 +15,6 @@ import (
 	. "github.com/onsi/gomega"
 )
 
-func getDefaultVCPUs() int {
-	args := []string{"--rm", Image, "sh", "-c", "sleep 5; nproc"}
-	stdout, _, exitCode := dockerRun(args...)
-	if stdout == "" || exitCode != 0 {
-		LogIfFail("Failed to get default number of vCPUs")
-		return -1
-	}
-
-	stdout = strings.Trim(stdout, "\n\t ")
-	vcpus, err := strconv.Atoi(stdout)
-	if err != nil {
-		LogIfFail("Failed to convert '%s' to int", stdout)
-		return -1
-	}
-
-	return vcpus
-}
-
 func withCPUPeriodAndQuota(quota, period, defaultVCPUs int, fail bool) TableEntry {
 	var msg string
 
@@ -64,7 +45,7 @@ var _ = Describe("Hot plug CPUs", func() {
 		args            []string
 		id              string
 		vCPUs           int
-		defaultVCPUs    = getDefaultVCPUs()
+		defaultVCPUs    int
 		waitTime        int
 		maxTries        int
 		checkCpusCmdFmt string
@@ -76,6 +57,7 @@ var _ = Describe("Hot plug CPUs", func() {
 		waitTime = 5
 		maxTries = 5
 		args = []string{"--rm", "--name", id}
+		defaultVCPUs = int(runtimeConfig.Hypervisor[DefaultHypervisor].DefaultVCPUs)
 		Expect(defaultVCPUs).To(BeNumerically(">", 0))
 	})
 

integration/docker/main_test.go

@@ -5,6 +5,8 @@
 package docker
 
 import (
+	"os"
+	"strings"
 	"testing"
 
 	. "github.com/kata-containers/tests"
@@ -17,11 +19,33 @@ const (
 	shouldNotFail = false
 )
 
+var runtimeConfig RuntimeConfig
+
 func randomDockerName() string {
 	return RandID(30)
 }
 
 func TestIntegration(t *testing.T) {
+	var err error
+	runtimeConfigPath := DefaultRuntimeConfigPath
+
+	args := []string{"--kata-show-default-config-paths"}
+	cmd := NewCommand(Runtime, args...)
+	stdout, _, exitCode := cmd.Run()
+	if exitCode == 0 && stdout != "" {
+		for _, c := range strings.Split(stdout, "\n") {
+			if _, err = os.Stat(c); err == nil {
+				runtimeConfigPath = c
+				break
+			}
+		}
+	}
+
+	runtimeConfig, err = LoadRuntimeConfiguration(runtimeConfigPath)
+	if err != nil {
+		t.Fatalf("failed to load runtime configuration: %v\n", err)
+	}
+
 	// before start we have to download the docker images
 	images := []string{
 		Image,