/
ingress.go
203 lines (177 loc) · 5.62 KB
/
ingress.go
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package model
import (
"git.containerum.net/ch/kube-api/pkg/kubeerrors"
kube_types "github.com/containerum/kube-client/pkg/model"
api_extensions "k8s.io/api/extensions/v1beta1"
"fmt"
"strings"
"time"
api_meta "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/intstr"
api_validation "k8s.io/apimachinery/pkg/util/validation"
)
const (
ingressKind = "Ingress"
ingressAPIVersion = "extensions/v1beta1"
)
type IngressKubeAPI kube_types.Ingress
// ParseKubeIngressList parses kubernetes v1beta1.IngressList to more convenient []Ingress struct
func ParseKubeIngressList(ingressi interface{}, parseforuser bool) (*kube_types.IngressesList, error) {
ingresses := ingressi.(*api_extensions.IngressList)
if ingresses == nil {
return nil, ErrUnableConvertIngressList
}
newIngresses := make([]kube_types.Ingress, 0)
for _, ingress := range ingresses.Items {
newIngress, err := ParseKubeIngress(&ingress, parseforuser)
if err != nil {
return nil, err
}
newIngresses = append(newIngresses, *newIngress)
}
return &kube_types.IngressesList{Ingress: newIngresses}, nil
}
// ParseKubeIngress parses kubernetes v1beta1.Ingress to more convenient Ingress struct
func ParseKubeIngress(ingressi interface{}, parseforuser bool) (*kube_types.Ingress, error) {
ingress := ingressi.(*api_extensions.Ingress)
if ingress == nil {
return nil, ErrUnableConvertIngress
}
newIngress := kube_types.Ingress{
Name: ingress.GetName(),
Namespace: ingress.Namespace,
CreatedAt: ingress.CreationTimestamp.UTC().Format(time.RFC3339),
Rules: parseRules(ingress.Spec.Rules, parseTLS(ingress.Spec.TLS)),
Owner: ingress.GetObjectMeta().GetLabels()[ownerLabel],
}
if parseforuser {
newIngress.Mask()
}
return &newIngress, nil
}
func parseRules(rules []api_extensions.IngressRule, secrets map[string]string) []kube_types.Rule {
newRules := make([]kube_types.Rule, 0)
for _, v := range rules {
newRule := kube_types.Rule{}
newRule.Host = v.Host
secret, ok := secrets[newRule.Host]
if ok {
newRule.TLSSecret = &secret
}
for _, p := range v.HTTP.Paths {
newPath := kube_types.Path{}
newPath.Path = p.Path
newPath.ServiceName = p.Backend.ServiceName
newPath.ServicePort = int(p.Backend.ServicePort.IntVal)
newRule.Path = append(newRule.Path, newPath)
}
newRules = append(newRules, newRule)
}
return newRules
}
func parseTLS(tlss []api_extensions.IngressTLS) map[string]string {
secrets := make(map[string]string)
for _, v := range tlss {
for _, h := range v.Hosts {
secrets[h] = v.SecretName
}
}
return secrets
}
// ToKube creates kubernetes v1beta1.Ingress from Ingress struct and namespace labels
func (ingress *IngressKubeAPI) ToKube(nsName string, labels map[string]string) (*api_extensions.Ingress, []error) {
err := ingress.Validate()
if err != nil {
return nil, err
}
if labels == nil {
return nil, []error{kubeerrors.ErrInternalError().AddDetails("invalid project labels")}
}
rules, secrets, tls := makeIngressRules(ingress.Rules)
newIngress := api_extensions.Ingress{
TypeMeta: api_meta.TypeMeta{
Kind: ingressKind,
APIVersion: ingressAPIVersion,
},
ObjectMeta: api_meta.ObjectMeta{
Labels: labels,
Name: ingress.Name,
Namespace: nsName,
Annotations: map[string]string{"kubernetes.io/ingress.class": "nginx"},
},
Spec: api_extensions.IngressSpec{
Rules: rules,
TLS: secrets,
},
}
if tls {
newIngress.ObjectMeta.Annotations["kubernetes.io/tls-acme"] = "true"
}
return &newIngress, nil
}
func makeIngressRules(rules []kube_types.Rule) ([]api_extensions.IngressRule, []api_extensions.IngressTLS, bool) {
newRules := make([]api_extensions.IngressRule, 0)
secrets := make([]api_extensions.IngressTLS, 0)
tls := false
for _, v := range rules {
paths := []api_extensions.HTTPIngressPath{}
for _, p := range v.Path {
paths = append(paths, api_extensions.HTTPIngressPath{
Path: p.Path,
Backend: api_extensions.IngressBackend{
ServiceName: p.ServiceName,
ServicePort: intstr.FromInt(p.ServicePort),
},
})
}
newRules = append(newRules, api_extensions.IngressRule{
Host: v.Host,
IngressRuleValue: api_extensions.IngressRuleValue{
HTTP: &api_extensions.HTTPIngressRuleValue{
Paths: paths,
},
},
})
if v.TLSSecret != nil {
tls = true
secrets = append(secrets, api_extensions.IngressTLS{
Hosts: []string{v.Host},
SecretName: *v.TLSSecret,
})
}
}
return newRules, secrets, tls
}
func (ingress *IngressKubeAPI) Validate() []error {
var errs []error
if ingress.Name == "" {
errs = append(errs, fmt.Errorf(fieldShouldExist, "name"))
} else if err := api_validation.IsDNS1123Subdomain(ingress.Name); len(err) > 0 {
errs = append(errs, fmt.Errorf(invalidName, ingress.Name, strings.Join(err, ",")))
}
if ingress.Rules == nil || len(ingress.Rules) == 0 {
errs = append(errs, fmt.Errorf(fieldShouldExist, "rules"))
}
for _, v := range ingress.Rules {
if v.Path == nil || len(v.Path) == 0 {
errs = append(errs, fmt.Errorf(fieldShouldExist, "rules.path"))
}
for _, p := range v.Path {
if p.ServiceName == "" {
errs = append(errs, fmt.Errorf(fieldShouldExist, "rules.path.name"))
} else if err := api_validation.IsDNS1035Label(p.ServiceName); len(err) > 0 {
errs = append(errs, fmt.Errorf(invalidName, p.ServiceName, strings.Join(err, ",")))
}
if len(api_validation.IsValidPortNum(p.ServicePort)) > 0 {
errs = append(errs, fmt.Errorf(invalidPort, p.ServicePort, 1, maxport))
}
if p.Path == "" {
errs = append(errs, fmt.Errorf(fieldShouldExist, "rules.path.name.path"))
}
}
}
if len(errs) > 0 {
return errs
}
return nil
}