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feat: add all resource type support for egctl x status (envoyproxy#…
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…2573)

* add all resource type for egctl x status

Signed-off-by: shawnh2 <[email protected]>

* change name to typed name for the all resources type

Signed-off-by: shawnh2 <[email protected]>

* fix lint

Signed-off-by: shawnh2 <[email protected]>

* change kind name to small-case

Signed-off-by: shawnh2 <[email protected]>

---------

Signed-off-by: shawnh2 <[email protected]>
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@shawnh2
shawnh2 authored Feb 22, 2024
1 parent c30d037 commit 5a0baf0
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Showing 3 changed files with 208 additions and 56 deletions.
151 changes: 106 additions & 45 deletions internal/cmd/egctl/status.go
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Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,13 @@ import (
egv1a1 "github.com/envoyproxy/gateway/api/v1alpha1"
)

// supportedTypes list all the resource types that status command supports.
var supportedTypes = []string{
"GatewayClass", "Gateway", "HTTPRoute", "GRPCRoute",
"TLSRoute", "TCPRoute", "UDPRoute", "BackendTLSPolicy",
"BackendTrafficPolicy", "ClientTrafficPolicy", "EnvoyPatchPolicy", "SecurityPolicy",
}

func newStatusCommand() *cobra.Command {
var (
quiet, verbose, allNamespaces bool
Expand All @@ -47,11 +54,12 @@ func newStatusCommand() *cobra.Command {
# Show the status of httproute resources under all namespaces.
egctl x status httproute -A
# Show the status of all resources under all namespaces.
egctl x status all -A
`,
RunE: func(cmd *cobra.Command, args []string) error {
ctx := context.Background()

table := newStatusTableWriter(os.Stdout)
k8sClient, err := newK8sClient()
if err != nil {
return err
Expand All @@ -66,14 +74,23 @@ func newStatusCommand() *cobra.Command {
return fmt.Errorf("invalid args: must specific a resources type")
}

return runStatus(ctx, k8sClient, table, resourceType, namespace, quiet, verbose, allNamespaces)
if resourceType == "all" {
for _, rt := range supportedTypes {
if err = runStatus(ctx, k8sClient, rt, namespace, quiet, verbose, allNamespaces, true, true); err != nil {
return err
}
}
return nil
} else {
return runStatus(ctx, k8sClient, resourceType, namespace, quiet, verbose, allNamespaces, false, false)
}
},
}

statusCommand.PersistentFlags().BoolVarP(&quiet, "quiet", "q", false, "Show the status of resources only")
statusCommand.PersistentFlags().BoolVarP(&quiet, "quiet", "q", false, "Show the first status of resources only")
statusCommand.PersistentFlags().BoolVarP(&verbose, "verbose", "v", false, "Show the status of resources with details")
statusCommand.PersistentFlags().BoolVarP(&allNamespaces, "all-namespaces", "A", false, "Get resources from all namespaces")
statusCommand.PersistentFlags().StringVarP(&namespace, "namespace", "n", "default", "Specific a namespace to get resources")
statusCommand.PersistentFlags().BoolVarP(&allNamespaces, "all-namespaces", "A", false, "Get the status of resources from all namespaces")
statusCommand.PersistentFlags().StringVarP(&namespace, "namespace", "n", "default", "Specific a namespace to get the status of resources")

return statusCommand
}
Expand All @@ -82,8 +99,19 @@ func newStatusTableWriter(out io.Writer) *tabwriter.Writer {
return tabwriter.NewWriter(out, 10, 0, 3, ' ', 0)
}

func runStatus(ctx context.Context, cli client.Client, table *tabwriter.Writer, resourceType, namespace string, quiet, verbose, allNamespaces bool) error {
var resourcesList client.ObjectList
func writeStatusTable(table *tabwriter.Writer, headers []string, bodies [][]string) {
fmt.Fprintln(table, strings.Join(headers, "\t"))
for _, body := range bodies {
fmt.Fprintln(table, strings.Join(body, "\t"))
}
}

// runStatus find and write the summary table of status for a specific resource type.
func runStatus(ctx context.Context, cli client.Client, resourceType, namespace string, quiet, verbose, allNamespaces, ignoreEmpty, typedName bool) error {
var (
resourcesList client.ObjectList
table = newStatusTableWriter(os.Stdout)
)

if allNamespaces {
namespace = ""
Expand Down Expand Up @@ -160,7 +188,7 @@ func runStatus(ctx context.Context, cli client.Client, table *tabwriter.Writer,
}
resourcesList = &ctp

case "epp", "enovypatchpolicy":
case "epp", "envoypatchpolicy":
epp := egv1a1.EnvoyPatchPolicyList{}
if err := cli.List(ctx, &epp, client.InNamespace(namespace)); err != nil {
return err
Expand All @@ -175,7 +203,7 @@ func runStatus(ctx context.Context, cli client.Client, table *tabwriter.Writer,
resourcesList = &sp

default:
return fmt.Errorf("unknown resource type: %s", resourceType)
return fmt.Errorf("unknown resource type: %s, supported types are: %s", resourceType, strings.Join(supportedTypes, ","))
}

namespaced, err := cli.IsObjectNamespaced(resourcesList)
Expand All @@ -184,16 +212,30 @@ func runStatus(ctx context.Context, cli client.Client, table *tabwriter.Writer,
}

needNamespaceHeader := allNamespaces && namespaced
writeStatusHeaders(table, verbose, needNamespaceHeader)
headers := fetchStatusHeaders(verbose, needNamespaceHeader)
bodies, err := fetchStatusBodies(resourcesList, resourceType, quiet, verbose, needNamespaceHeader, typedName)
if err != nil {
return err
}

if ignoreEmpty && len(bodies) == 0 {
return nil
}

if err = writeStatusBodies(table, resourcesList, resourceType, quiet, verbose, needNamespaceHeader); err != nil {
writeStatusTable(table, headers, bodies)
if err = table.Flush(); err != nil {
return err
}

return table.Flush()
// Separate tables by newline if there are multiple tables.
if ignoreEmpty && typedName {
fmt.Print("\n")
}

return nil
}

func writeStatusHeaders(table *tabwriter.Writer, verbose, needNamespace bool) {
func fetchStatusHeaders(verbose, needNamespace bool) []string {
headers := []string{"NAME", "TYPE", "STATUS", "REASON"}

if needNamespace {
Expand All @@ -203,109 +245,128 @@ func writeStatusHeaders(table *tabwriter.Writer, verbose, needNamespace bool) {
headers = append(headers, []string{"MESSAGE", "OBSERVED GENERATION", "LAST TRANSITION TIME"}...)
}

fmt.Fprintln(table, strings.Join(headers, "\t"))
return headers
}

func writeStatusBodies(table *tabwriter.Writer, resourcesList client.ObjectList, resourceType string, quiet, verbose, needNamespace bool) error {
func fetchStatusBodies(resourcesList client.ObjectList, resourceType string, quiet, verbose, needNamespace, typedName bool) ([][]string, error) {
v := reflect.ValueOf(resourcesList).Elem()

itemsField := v.FieldByName("Items")
if !itemsField.IsValid() {
return fmt.Errorf("failed to load `.Items` field from %s", resourceType)
return nil, fmt.Errorf("failed to load `.Items` field from %s", resourceType)
}

var body [][]string
for i := 0; i < itemsField.Len(); i++ {
item := itemsField.Index(i)

// There's no need to check whether Name, Namespace and Kind field is valid,
// since all the objects in ObjectList are implemented k8s Object interface.
var name, namespace string
nameField := item.FieldByName("Name")
if !nameField.IsValid() {
return fmt.Errorf("failed to find `.Items[i].Name` field from %s", resourceType)
if typedName {
kindField := item.FieldByName("Kind")
name = strings.ToLower(kindField.String()) + "/" + nameField.String()
} else {
name = nameField.String()
}
name = nameField.String()

if needNamespace {
namespaceField := item.FieldByName("Namespace")
if !namespaceField.IsValid() {
return fmt.Errorf("failed to find `.Items[i].Namespace` field from %s", resourceType)
}
namespace = namespaceField.String()
}

statusField := item.FieldByName("Status")
if !statusField.IsValid() {
return fmt.Errorf("failed to find `.Items[i].Status` field from %s", resourceType)
return nil, fmt.Errorf("failed to find `.Items[i].Status` field from %s", resourceType)
}

// Different resources store the conditions at different position.
switch {
case strings.Contains(resourceType, "route"):
switch strings.ToLower(resourceType) {
case "httproute", "grpcroute", "tlsroute", "tcproute", "udproute":
// Scrape conditions from `Resource.Status.Parents[i].Conditions` field
parentsField := statusField.FieldByName("Parents")
if !parentsField.IsValid() {
return fmt.Errorf("failed to find `.Items[i].Status.Parents` field from %s", resourceType)
return nil, fmt.Errorf("failed to find `.Items[i].Status.Parents` field from %s", resourceType)
}

for j := 0; j < parentsField.Len(); j++ {
parentItem := parentsField.Index(j)
if err := findAndWriteConditions(table, parentItem, resourceType, name, namespace, quiet, verbose, needNamespace); err != nil {
return err
rows, err := fetchConditionsField(parentItem, resourceType, name, namespace, quiet, verbose, needNamespace)
if err != nil {
return nil, err
}

body = append(body, rows...)
}

case resourceType == "btlspolicy" || resourceType == "backendtlspolicy":
case "btlspolicy", "backendtlspolicy":
// Scrape conditions from `Resource.Status.Ancestors[i].Conditions` field
ancestorsField := statusField.FieldByName("Ancestors")
if !ancestorsField.IsValid() {
return fmt.Errorf("failed to find `.Items[i].Status.Ancestors` field from %s", resourceType)
return nil, fmt.Errorf("failed to find `.Items[i].Status.Ancestors` field from %s", resourceType)
}

for j := 0; j < ancestorsField.Len(); j++ {
ancestorItem := ancestorsField.Index(j)
if err := findAndWriteConditions(table, ancestorItem, resourceType, name, namespace, quiet, verbose, needNamespace); err != nil {
return err
rows, err := fetchConditionsField(ancestorItem, resourceType, name, namespace, quiet, verbose, needNamespace)
if err != nil {
return nil, err
}

body = append(body, rows...)
}

default:
// Scrape conditions from `Resource.Status.Conditions` field
if err := findAndWriteConditions(table, statusField, resourceType, name, namespace, quiet, verbose, needNamespace); err != nil {
return err
rows, err := fetchConditionsField(statusField, resourceType, name, namespace, quiet, verbose, needNamespace)
if err != nil {
return nil, err
}

body = append(body, rows...)
}
}

return nil
return body, nil
}

func findAndWriteConditions(table *tabwriter.Writer, parent reflect.Value, resourceType, name, namespace string, quiet, verbose, needNamespace bool) error {
func fetchConditionsField(parent reflect.Value, resourceType, name, namespace string, quiet, verbose, needNamespace bool) ([][]string, error) {
conditionsField := parent.FieldByName("Conditions")
if !conditionsField.IsValid() {
return fmt.Errorf("failed to find `Conditions` field for %s", resourceType)
return nil, fmt.Errorf("failed to find `Conditions` field for %s", resourceType)
}

conditions := conditionsField.Interface().([]metav1.Condition)
writeConditions(table, conditions, name, namespace, quiet, verbose, needNamespace)
conditions, ok := conditionsField.Interface().([]metav1.Condition)
if !ok {
return nil, fmt.Errorf("failed to convert `Conditions` field to type `[]metav1.Condition`")
}

return nil
rows := fetchConditions(conditions, name, namespace, quiet, verbose, needNamespace)
return rows, nil
}

func writeConditions(table *tabwriter.Writer, conditions []metav1.Condition, name, namespace string, quiet, verbose, needNamespace bool) {
func fetchConditions(conditions []metav1.Condition, name, namespace string, quiet, verbose, needNamespace bool) [][]string {
var rows [][]string

// Sort in descending order by time of each condition.
for i := len(conditions) - 1; i >= 0; i-- {
if i < len(conditions)-1 {
name, namespace = "", ""
}

writeCondition(table, conditions[i], name, namespace, verbose, needNamespace)
row := fetchCondition(conditions[i], name, namespace, verbose, needNamespace)
rows = append(rows, row)

if quiet {
break
}
}

return rows
}

func writeCondition(table *tabwriter.Writer, condition metav1.Condition, name, namespace string, verbose, needNamespace bool) {
func fetchCondition(condition metav1.Condition, name, namespace string, verbose, needNamespace bool) []string {
row := []string{name, condition.Type, string(condition.Status), condition.Reason}

// Write conditions corresponding to its headers.
Expand All @@ -320,5 +381,5 @@ func writeCondition(table *tabwriter.Writer, condition metav1.Condition, name, n
}...)
}

fmt.Fprintln(table, strings.Join(row, "\t"))
return row
}
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