forked from kubernetes/ingress-nginx
/
ingresses.go
235 lines (201 loc) · 5.83 KB
/
ingresses.go
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/*
Copyright 2019 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package ingresses
import (
"fmt"
"os"
"text/tabwriter"
"github.com/spf13/cobra"
networking "k8s.io/api/networking/v1"
"k8s.io/apimachinery/pkg/util/intstr"
"k8s.io/cli-runtime/pkg/genericclioptions"
"k8s.io/ingress-nginx/cmd/plugin/request"
"k8s.io/ingress-nginx/cmd/plugin/util"
)
// CreateCommand creates and returns this cobra subcommand
func CreateCommand(flags *genericclioptions.ConfigFlags) *cobra.Command {
cmd := &cobra.Command{
Use: "ingresses",
Aliases: []string{"ingress", "ing"},
Short: "Provide a short summary of all of the ingress definitions",
RunE: func(cmd *cobra.Command, _ []string) error {
host, err := cmd.Flags().GetString("host")
if err != nil {
return err
}
allNamespaces, err := cmd.Flags().GetBool("all-namespaces")
if err != nil {
return err
}
util.PrintError(ingresses(flags, host, allNamespaces))
return nil
},
}
cmd.Flags().String("host", "", "Show just the ingress definitions for this hostname")
cmd.Flags().Bool("all-namespaces", false, "Find ingress definitions from all namespaces")
return cmd
}
func ingresses(flags *genericclioptions.ConfigFlags, host string, allNamespaces bool) error {
var namespace string
if allNamespaces {
namespace = ""
} else {
namespace = util.GetNamespace(flags)
}
ingresses, err := request.GetIngressDefinitions(flags, namespace)
if err != nil {
return err
}
rows := getIngressRows(&ingresses)
if host != "" {
rowsWithHost := make([]ingressRow, 0)
for i := range rows {
if rows[i].Host == host {
rowsWithHost = append(rowsWithHost, rows[i])
}
}
rows = rowsWithHost
}
printer := tabwriter.NewWriter(os.Stdout, 6, 4, 3, ' ', 0)
defer printer.Flush()
if allNamespaces {
fmt.Fprintln(printer, "NAMESPACE\tINGRESS NAME\tHOST+PATH\tADDRESSES\tTLS\tSERVICE\tSERVICE PORT\tENDPOINTS")
} else {
fmt.Fprintln(printer, "INGRESS NAME\tHOST+PATH\tADDRESSES\tTLS\tSERVICE\tSERVICE PORT\tENDPOINTS")
}
for i := range rows {
row := &rows[i]
var tlsMsg string
if row.TLS {
tlsMsg = "YES"
} else {
tlsMsg = "NO"
}
numEndpoints, err := request.GetNumEndpoints(flags, row.Namespace, row.ServiceName)
if err != nil {
return err
}
if numEndpoints == nil {
row.NumEndpoints = "N/A"
} else {
row.NumEndpoints = fmt.Sprint(*numEndpoints)
}
if allNamespaces {
fmt.Fprintf(printer, "%v\t%v\t%v\t%v\t%v\t%v\t%v\t%v\n", row.Namespace, row.IngressName, row.Host+row.Path, row.Address, tlsMsg, row.ServiceName, row.ServicePort, row.NumEndpoints)
} else {
fmt.Fprintf(printer, "%v\t%v\t%v\t%v\t%v\t%v\t%v\n", row.IngressName, row.Host+row.Path, row.Address, tlsMsg, row.ServiceName, row.ServicePort, row.NumEndpoints)
}
}
return nil
}
type ingressRow struct {
Namespace string
IngressName string
Host string
Path string
TLS bool
ServiceName string
ServicePort string
Address string
NumEndpoints string
}
func getIngressRows(ingresses *[]networking.Ingress) []ingressRow {
rows := make([]ingressRow, 0)
for i := range *ingresses {
ing := &(*ingresses)[i]
address := ""
for _, lbIng := range ing.Status.LoadBalancer.Ingress {
if lbIng.IP != "" {
address = address + lbIng.IP + ","
}
if lbIng.Hostname != "" {
address = address + lbIng.Hostname + ","
}
}
if address != "" {
address = address[:len(address)-1]
}
tlsHosts := make(map[string]struct{})
for _, tls := range ing.Spec.TLS {
for _, host := range tls.Hosts {
tlsHosts[host] = struct{}{}
}
}
defaultBackendService := ""
defaultBackendPort := ""
if ing.Spec.DefaultBackend != nil {
name, port := serviceToNameAndPort(ing.Spec.DefaultBackend.Service)
defaultBackendService = name
defaultBackendPort = port.String()
}
// Handle catch-all ingress
if len(ing.Spec.Rules) == 0 && defaultBackendService != "" {
row := ingressRow{
Namespace: ing.Namespace,
IngressName: ing.Name,
Host: "*",
ServiceName: defaultBackendService,
ServicePort: defaultBackendPort,
Address: address,
}
rows = append(rows, row)
continue
}
for _, rule := range ing.Spec.Rules {
_, hasTLS := tlsHosts[rule.Host]
// Handle ingress with no paths
if rule.HTTP == nil {
row := ingressRow{
Namespace: ing.Namespace,
IngressName: ing.Name,
Host: rule.Host,
Path: "",
TLS: hasTLS,
ServiceName: defaultBackendService,
ServicePort: defaultBackendPort,
Address: address,
}
rows = append(rows, row)
continue
}
for _, path := range rule.HTTP.Paths {
svcName, svcPort := serviceToNameAndPort(path.Backend.Service)
row := ingressRow{
Namespace: ing.Namespace,
IngressName: ing.Name,
Host: rule.Host,
Path: path.Path,
TLS: hasTLS,
ServiceName: svcName,
ServicePort: svcPort.String(),
Address: address,
}
rows = append(rows, row)
}
}
}
return rows
}
func serviceToNameAndPort(svc *networking.IngressServiceBackend) (string, intstr.IntOrString) {
var svcName string
if svc != nil {
svcName = svc.Name
if svc.Port.Number > 0 {
return svcName, intstr.FromInt(int(svc.Port.Number))
}
if svc.Port.Name != "" {
return svcName, intstr.FromString(svc.Port.Name)
}
}
return "", intstr.IntOrString{}
}