feat: allow users to check cpu arch (#1644)

pkg/analyze/host_cpu.go

@@ -63,7 +63,7 @@ func (a *AnalyzeHostCPU) Analyze(
 				return []*AnalyzeResult{&result}, nil
 			}
 
-			isMatch, err := compareHostCPUConditionalToActual(outcome.Fail.When, cpuInfo.LogicalCount, cpuInfo.PhysicalCount, cpuInfo.Flags)
+			isMatch, err := compareHostCPUConditionalToActual(outcome.Fail.When, cpuInfo.LogicalCount, cpuInfo.PhysicalCount, cpuInfo.Flags, cpuInfo.MachineArch)
 			if err != nil {
 				return nil, errors.Wrap(err, "failed to compare")
 			}
@@ -84,7 +84,7 @@ func (a *AnalyzeHostCPU) Analyze(
 				return []*AnalyzeResult{&result}, nil
 			}
 
-			isMatch, err := compareHostCPUConditionalToActual(outcome.Warn.When, cpuInfo.LogicalCount, cpuInfo.PhysicalCount, cpuInfo.Flags)
+			isMatch, err := compareHostCPUConditionalToActual(outcome.Warn.When, cpuInfo.LogicalCount, cpuInfo.PhysicalCount, cpuInfo.Flags, cpuInfo.MachineArch)
 			if err != nil {
 				return nil, errors.Wrap(err, "failed to compare")
 			}
@@ -105,7 +105,7 @@ func (a *AnalyzeHostCPU) Analyze(
 				return []*AnalyzeResult{&result}, nil
 			}
 
-			isMatch, err := compareHostCPUConditionalToActual(outcome.Pass.When, cpuInfo.LogicalCount, cpuInfo.PhysicalCount, cpuInfo.Flags)
+			isMatch, err := compareHostCPUConditionalToActual(outcome.Pass.When, cpuInfo.LogicalCount, cpuInfo.PhysicalCount, cpuInfo.Flags, cpuInfo.MachineArch)
 			if err != nil {
 				return nil, errors.Wrap(err, "failed to compare")
 			}
@@ -164,14 +164,19 @@ func doCompareHostCPUFlags(expected string, flags []string) (res bool, err error
 	return true, nil
 }
 
-func compareHostCPUConditionalToActual(conditional string, logicalCount int, physicalCount int, flags []string) (res bool, err error) {
+func compareHostCPUConditionalToActual(conditional string, logicalCount int, physicalCount int, flags []string, machineArch string) (res bool, err error) {
 	compareLogical := false
 	comparePhysical := false
 	compareUnspecified := false
+	compareMachineArch := false
 
 	comparator := ""
 	desired := ""
 
+	/* When the conditional is in the format of "logical <comparator> <desired>"
+	   example: when: "count < 2"
+	*/
+
 	parts := strings.Split(conditional, " ")
 	if len(parts) == 3 {
 		comparator = parts[1]
@@ -182,6 +187,8 @@ func compareHostCPUConditionalToActual(conditional string, logicalCount int, phy
 			comparePhysical = true
 		} else if strings.ToLower(parts[0]) == "count" {
 			compareUnspecified = true
+		} else if strings.ToLower(parts[0]) == "machinearch" {
+			compareMachineArch = true
 		}
 	} else if len(parts) == 2 {
 		compareUnspecified = true
@@ -199,7 +206,7 @@ func compareHostCPUConditionalToActual(conditional string, logicalCount int, phy
 		return doCompareHostCPUFlags(desired, flags)
 	}
 
-	if !compareLogical && !comparePhysical && !compareUnspecified {
+	if !compareLogical && !comparePhysical && !compareUnspecified && !compareMachineArch {
 		return false, errors.New("unable to parse conditional")
 	}
 
@@ -207,6 +214,8 @@ func compareHostCPUConditionalToActual(conditional string, logicalCount int, phy
 		return doCompareHostCPU(comparator, desired, logicalCount)
 	} else if comparePhysical {
 		return doCompareHostCPU(comparator, desired, physicalCount)
+	} else if compareMachineArch {
+		return doCompareMachineArch(comparator, desired, machineArch)
 	} else {
 		actual := logicalCount
 		if physicalCount > logicalCount {
@@ -217,6 +226,16 @@ func compareHostCPUConditionalToActual(conditional string, logicalCount int, phy
 	}
 }
 
+func doCompareMachineArch(operator string, desired string, actual string) (bool, error) {
+	switch operator {
+	case "=", "==", "===":
+		return actual == desired, nil
+	case "!=", "!==":
+		return actual != desired, nil
+	}
+	return false, errors.New("unknown operator")
+}
+
 func doCompareHostCPU(operator string, desired string, actual int) (bool, error) {
 	desiredInt, err := strconv.ParseInt(desired, 10, 64)
 	if err != nil {
@@ -234,6 +253,8 @@ func doCompareHostCPU(operator string, desired string, actual int) (bool, error)
 		return actual >= int(desiredInt), nil
 	case "=", "==", "===":
 		return actual == int(desiredInt), nil
+	case "!=", "!==":
+		return actual != int(desiredInt), nil
 	}
 
 	return false, errors.New("unknown operator")

pkg/analyze/host_cpu_test.go

@@ -82,6 +82,7 @@ func Test_compareHostCPUConditionalToActual(t *testing.T) {
 		logicalCount  int
 		physicalCount int
 		flags         []string
+		machineArch   string
 		expected      bool
 	}{
 		{
@@ -164,12 +165,18 @@ func Test_compareHostCPUConditionalToActual(t *testing.T) {
 			flags:    []string{"a", "b", "c", "d", "e"},
 			expected: true,
 		},
+		{
+			name:        "machine arch matches",
+			when:        "machineArch == x86_64",
+			machineArch: "x86_64",
+			expected:    true,
+		},
 	}
 	for _, test := range tests {
 		t.Run(test.name, func(t *testing.T) {
 			req := require.New(t)
 
-			actual, err := compareHostCPUConditionalToActual(test.when, test.logicalCount, test.physicalCount, test.flags)
+			actual, err := compareHostCPUConditionalToActual(test.when, test.logicalCount, test.physicalCount, test.flags, test.machineArch)
 			req.NoError(err)
 
 			assert.Equal(t, test.expected, actual)

pkg/collect/host_cpu.go

@@ -7,12 +7,14 @@ import (
 	"github.com/pkg/errors"
 	troubleshootv1beta2 "github.com/replicatedhq/troubleshoot/pkg/apis/troubleshoot/v1beta2"
 	"github.com/shirou/gopsutil/v3/cpu"
+	"github.com/shirou/gopsutil/v3/host"
 )
 
 type CPUInfo struct {
 	LogicalCount  int      `json:"logicalCount"`
 	PhysicalCount int      `json:"physicalCount"`
 	Flags         []string `json:"flags"`
+	MachineArch   string   `json:"machineArch"`
 }
 
 const HostCPUPath = `host-collectors/system/cpu.json`
@@ -45,6 +47,11 @@ func (c *CollectHostCPU) Collect(progressChan chan<- interface{}) (map[string][]
 	}
 	cpuInfo.PhysicalCount = physicalCount
 
+	cpuInfo.MachineArch, err = host.KernelArch()
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to fetch cpu architecture")
+	}
+
 	// XXX even though the cpu.Info() returns a slice per CPU it is way
 	// common to have the same flags for all CPUs. We consolidate them here
 	// so the output is a list of all different flags present in all CPUs.

pkg/collect/host_cpu_test.go

@@ -25,8 +25,9 @@ func TestCollectHostCPU_Collect(t *testing.T) {
 	require.NoError(t, err)
 
 	// Check if values exist. They will be different on different machines.
-	assert.Equal(t, 3, len(m))
+	assert.Equal(t, 4, len(m))
 	assert.Contains(t, m, "logicalCount")
 	assert.Contains(t, m, "physicalCount")
 	assert.Contains(t, m, "flags")
+	assert.Contains(t, m, "machineArch")
 }