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config.go
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config.go
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/*
Copyright 2016 Citrix Systems, Inc. All rights reserved.
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 netscaler
import (
"encoding/json"
"errors"
"fmt"
"log"
"sort"
"strconv"
"strings"
)
type NetscalerService struct {
Name string `json:"name"`
Ip string `json:"ip"`
ServiceType string `json:"serviceType"`
Port int `json:"port"`
}
type NetscalerLB struct {
Name string `json:"name"`
Ipv46 string `json:"ipv46"`
ServiceType string `json:"serviceType"`
Port int `json:"port"`
}
type NetscalerLBServiceBinding struct {
Name string `json:"name"`
ServiceName string `json:"serviceName"`
}
type NetscalerCsAction struct {
Name string `json:"name"`
TargetLBVserver string `json:"targetLBVserver"`
}
type NetscalerCsPolicy struct {
PolicyName string `json:"policyName"`
Rule string `json:"rule"`
Action string `json:"action"`
}
type NetscalerCsPolicyBinding struct {
Name string `json:"name"`
PolicyName string `json:"policyName"`
Priority int `json:"priority"`
Bindpoint string `json:"bindpoint"`
}
type NetscalerCsVserver struct {
Name string `json:"name"`
ServiceType string `json:"serviceType"`
Ipv46 string `json:"ipv46"`
Port int `json:"port"`
}
func GenerateLbName(namespace string, host string) string {
lbName := "lb_" + strings.Replace(host, ".", "_", -1)
return lbName
}
func GenerateCsVserverName(namespace string, ingressName string) string {
csv := "cs_" + namespace + "_" + ingressName
return csv
}
func GeneratePolicyName(namespace string, host string, path string) string {
path_ := path
if path == "" {
path_ = "nilpath"
}
path_ = strings.Replace(path_, "/", "_", -1)
host = strings.Replace(host, ".", "_", -1)
policyName := host + "-" + path_ + "_policy"
return policyName
}
func GenerateActionName(namespace string, host string, path string) string {
path_ := path
if path == "" {
path_ = "nilpath"
}
path_ = strings.Replace(path_, "/", "_", -1)
host = strings.Replace(host, ".", "_", -1)
actionName := host + "-" + path_ + "_action"
return actionName
}
func DeleteService(sname string) {
resourceType := "service"
_, err := deleteResource(resourceType, sname)
if err != nil {
log.Println(fmt.Sprintf("Failed to delete service %s err=%s", sname, err))
}
}
func AddAndBindService(lbName string, sname string, IpPort string) {
//create a Netscaler Service that represents the Kubernetes service
resourceType := "service"
ep_ip_port := strings.Split(IpPort, ":")
servicePort, _ := strconv.Atoi(ep_ip_port[1])
nsService := &struct {
Service NetscalerService `json:"service"`
}{Service: NetscalerService{Name: sname, Ip: ep_ip_port[0], ServiceType: "HTTP", Port: servicePort}}
resourceJson, err := json.Marshal(nsService)
if err != nil {
log.Fatal(fmt.Sprintf("Failed to marshal service %s err=", sname, err))
return
}
log.Println(string(resourceJson))
body, err := createResource(resourceType, resourceJson)
if err != nil {
log.Fatal(fmt.Sprintf("Failed to create service %s err=%s", sname, err))
return
}
_ = body
//bind the lb to the service
resourceType = "lbvserver"
boundResourceType := "service"
if FindBoundResource(resourceType, lbName, boundResourceType, "servicename", sname) == false {
nsLbSvcBinding := &struct {
Lbvserver_service_binding NetscalerLBServiceBinding `json:"lbvserver_service_binding"`
}{Lbvserver_service_binding: NetscalerLBServiceBinding{Name: lbName, ServiceName: sname}}
resourceJson, err := json.Marshal(nsLbSvcBinding)
resourceType = "lbvserver_service_binding"
body, err := createResource(resourceType, resourceJson)
if err != nil {
log.Fatal(fmt.Sprintf("Failed to bind lb %s to service %s, err=%s", lbName, sname, err))
//TODO roll back
return
}
_ = body
}
}
func ConfigureContentVServer(namespace string, csvserverName string, domainName string, path string, serviceIp string,
serviceName string, servicePort int, priority int, svcname_refcount map[string]int) string {
lbName := GenerateLbName(namespace, domainName)
policyName := GeneratePolicyName(namespace, domainName, path)
actionName := GenerateActionName(namespace, domainName, path)
//create a Netscaler Service that represents the Kubernetes service
resourceType := "service"
if FindResource(resourceType, serviceName) == false {
nsService := &struct {
Service NetscalerService `json:"service"`
}{Service: NetscalerService{Name: serviceName, Ip: serviceIp, ServiceType: "HTTP", Port: servicePort}}
resourceJson, err := json.Marshal(nsService)
if err != nil {
log.Fatal(fmt.Sprintf("Failed to marshal service %s err=", serviceName, err))
return ""
}
log.Println(string(resourceJson))
body, err := createResource(resourceType, resourceJson)
if err != nil {
log.Fatal(fmt.Sprintf("Failed to create service %s err=%s", serviceName, err))
return ""
}
_ = body
}
_, present := svcname_refcount[serviceName]
if present {
svcname_refcount[serviceName]++
} else {
svcname_refcount[serviceName] = 1
}
//create a Netscaler "lbvserver" to front the service
resourceType = "lbvserver"
if FindResource(resourceType, lbName) == false {
nsLB := &struct {
Lbvserver NetscalerLB `json:"lbvserver"`
}{Lbvserver: NetscalerLB{Name: lbName, Ipv46: "0.0.0.0", ServiceType: "HTTP", Port: 0}}
resourceJson, err := json.Marshal(nsLB)
body, err := createResource(resourceType, resourceJson)
if err != nil {
log.Fatal(fmt.Sprintf("Failed to create lb %s, err=%s", lbName, err))
//TODO roll back
return ""
}
_ = body
}
//bind the lb to the service
resourceType = "lbvserver"
boundResourceType := "service"
if FindBoundResource(resourceType, lbName, boundResourceType, "servicename", serviceName) == false {
nsLbSvcBinding := &struct {
Lbvserver_service_binding NetscalerLBServiceBinding `json:"lbvserver_service_binding"`
}{Lbvserver_service_binding: NetscalerLBServiceBinding{Name: lbName, ServiceName: serviceName}}
resourceJson, err := json.Marshal(nsLbSvcBinding)
resourceType = "lbvserver_service_binding"
body, err := createResource(resourceType, resourceJson)
if err != nil {
log.Fatal(fmt.Sprintf("Failed to bind lb %s to service %s, err=%s", lbName, serviceName, err))
//TODO roll back
return ""
}
_ = body
}
//create a content switch action to switch to the lb
resourceType = "csaction"
if FindResource(resourceType, actionName) == false {
nsCsAction := &struct {
Csaction NetscalerCsAction `json:"csaction"`
}{Csaction: NetscalerCsAction{Name: actionName, TargetLBVserver: lbName}}
resourceJson, err := json.Marshal(nsCsAction)
body, err := createResource(resourceType, resourceJson)
if err != nil {
log.Fatal(fmt.Sprintf("Failed to create Content Switching Action %s to LB %s err=%s", actionName, lbName, err))
//TODO roll back
return ""
}
_ = body
}
//create a content switch policy to use the action
var rule string
resourceType = "cspolicy"
if FindResource(resourceType, policyName) == false {
if path != "" {
rule = fmt.Sprintf("HTTP.REQ.HOSTNAME.EQ(\"%s\") && HTTP.REQ.URL.PATH.EQ(\"%s\")", domainName, path)
} else {
rule = fmt.Sprintf("HTTP.REQ.HOSTNAME.EQ(\"%s\")", domainName)
}
nsCsPolicy := &struct {
Cspolicy NetscalerCsPolicy `json:"cspolicy"`
}{Cspolicy: NetscalerCsPolicy{PolicyName: policyName, Rule: rule, Action: actionName}}
resourceJson, err := json.Marshal(nsCsPolicy)
body, err := createResource(resourceType, resourceJson)
if err != nil {
log.Fatal(fmt.Sprintf("Failed to create Content Switching Policy %s, err=%s", policyName, err))
//TODO roll back
return ""
}
_ = body
}
//bind the content switch policy to the content switching vserver
resourceType = "csvserver"
boundResourceType = "cspolicy"
if FindBoundResource(resourceType, csvserverName, boundResourceType, "policyname", policyName) == false {
nsCsPolicyBinding := &struct {
Csvserver_cspolicy_binding NetscalerCsPolicyBinding `json:"csvserver_cspolicy_binding"`
}{Csvserver_cspolicy_binding: NetscalerCsPolicyBinding{Name: csvserverName, PolicyName: policyName, Priority: priority, Bindpoint: "REQUEST"}}
resourceJson, err := json.Marshal(nsCsPolicyBinding)
resourceType = "csvserver_cspolicy_binding"
body, err := createResource(resourceType, resourceJson)
if err != nil {
log.Fatal(fmt.Sprintf("Failed to bind Content Switching Policy %s to Content Switching VServer %s, err=%s", policyName, csvserverName, err))
return ""
}
_ = body
}
return lbName
}
func CreateContentVServer(csvserverName string, vserverIp string, vserverPort int, protocol string) error {
resourceType := "csvserver"
if FindResource(resourceType, csvserverName) == false {
contentServer := &struct {
Csvserver NetscalerCsVserver `json:"csvserver"`
}{Csvserver: NetscalerCsVserver{Name: csvserverName, Ipv46: vserverIp, ServiceType: protocol, Port: vserverPort}}
resourceJson, err := json.Marshal(contentServer)
body, err := createResource(resourceType, resourceJson)
_ = body
if err != nil {
log.Fatal(fmt.Sprintf("Failed to create Content Switching Vserver %s, err=%s", csvserverName, err))
return errors.New("Failed to create Content Switching Vserver " + csvserverName)
}
}
return nil
}
func DeleteContentVServer(csvserverName string, svcname_refcount map[string]int, lbName_map map[string]int) {
policyNames, _ := ListBoundPolicies(csvserverName)
for _, policyName := range policyNames {
//unbind the content switch policy from the content switching vserver
resourceType := "csvserver_cspolicy_binding"
_, err := unbindResource(resourceType, csvserverName, "policyName", policyName)
if err != nil {
log.Fatal(fmt.Sprintf("Failed to unbind Content Switching Policy %s fromo Content Switching VServer %s, err=%s", policyName, csvserverName, err))
continue
}
//find the action name from the policy
actionName := ListPolicyAction(policyName)
//delete the content switch policy that uses the action
resourceType = "cspolicy"
_, err = deleteResource(resourceType, policyName)
if err != nil {
log.Printf("Failed to delete Content Switching Policy %s, err=%s", policyName, err)
continue
}
//find the lb name associated with the action
lbName, err := ListLbVserverForAction(actionName)
if err != nil {
log.Printf("Failed to obtain lb name for cs action %s", actionName)
continue
}
//delete content switch action that switches to the lb
resourceType = "csaction"
_, err = deleteResource(resourceType, actionName)
if err != nil {
log.Fatal(fmt.Sprintf("Failed to delete Content Switching Action %s for LB %s err=%s", actionName, lbName, err))
return
}
//find the service names that the LB is bound to
serviceNames, err := ListBoundServicesForLB(lbName)
if err != nil {
log.Printf("Failed to retrieve services bound to LB " + lbName)
continue
}
for _, sname := range serviceNames {
//unbind the service from the LB
resourceType = "lbvserver_service_binding"
_, err = unbindResource(resourceType, lbName, "servicename", sname)
if err != nil {
log.Fatal(fmt.Sprintf("Failed to unbind svc %s from lb %s, err=%s", sname, lbName, err))
continue
}
}
//delete "lbvserver" that fronts the service
resourceType = "lbvserver"
_, err = deleteResource(resourceType, lbName)
if err != nil {
log.Println(fmt.Sprintf("Failed to delete lb %s, err=%s", lbName, err))
continue
}
if lbName_map != nil {
delete(lbName_map, lbName)
}
//Delete the Netscaler Services
for _, sname := range serviceNames {
resourceType = "service"
_, present := svcname_refcount[sname]
if present {
svcname_refcount[sname]--
}
if svcname_refcount[sname] == 0 {
delete(svcname_refcount, sname)
_, err = deleteResource(resourceType, sname)
if err != nil {
log.Println(fmt.Sprintf("Failed to delete service %s err=%s", sname, err))
continue
}
}
}
}
deleteResource("csvserver", csvserverName)
}
func UnconfigureContentVServer(namespace string, csvserverName string, domainName string, path string, serviceName string) {
lbName := GenerateLbName(namespace, domainName)
actionName := GenerateActionName(namespace, domainName, path)
policyName := GeneratePolicyName(namespace, domainName, path)
//unbind the content switch policy from the content switching vserver
resourceType := "csvserver_cspolicy_binding"
body, err := unbindResource(resourceType, csvserverName, "policyName", policyName)
if err != nil {
log.Fatal(fmt.Sprintf("Failed to unbind Content Switching Policy %s fromo Content Switching VServer %s, err=%s", policyName, csvserverName, err))
return
}
//delete the content switch policy that uses the action
resourceType = "cspolicy"
body, err = deleteResource(resourceType, policyName)
if err != nil {
log.Fatal(fmt.Sprintf("Failed to delete Content Switching Policy %s, err=%s", policyName, err))
return
}
//delete content switch action that switches to the lb
resourceType = "csaction"
body, err = deleteResource(resourceType, actionName)
if err != nil {
log.Fatal(fmt.Sprintf("Failed to delete Content Switching Action %s for LB %s err=%s", actionName, lbName, err))
return
}
//unbind the service from the LB
resourceType = "lbvserver_service_binding"
body, err = unbindResource(resourceType, lbName, "servicename", serviceName)
if err != nil {
log.Fatal(fmt.Sprintf("Failed to unbind svc %s from lb %s, err=%s", serviceName, lbName, err))
return
}
//delete "lbvserver" that fronts the service
resourceType = "lbvserver"
body, err = deleteResource(resourceType, lbName)
if err != nil {
log.Println(fmt.Sprintf("Failed to delete lb %s, err=%s", lbName, err))
}
//Delete the Netscaler Service
resourceType = "service"
body, err = deleteResource(resourceType, serviceName)
if err != nil {
log.Println(fmt.Sprintf("Failed to delete %s err=%s", serviceName, err))
}
_ = body
}
func FindContentVserver(csvserverName string) bool {
_, err := listResource("csvserver", csvserverName)
if err != nil {
log.Printf("No csvserver %s", csvserverName)
return false
}
return true
}
func ListContentVservers() []string {
result := []string{}
body, err := listResource("csvserver", "")
if err != nil {
log.Printf("No csvservers found")
return result
}
var data map[string]interface{}
if err := json.Unmarshal(body, &data); err != nil {
log.Println("Failed to unmarshal Netscaler Response!")
return []string{}
}
if data["csvserver"] == nil {
log.Printf("No csvservers found")
return result
}
csvs := data["csvserver"].([]interface{})
for _, c := range csvs {
csvserver := c.(map[string]interface{})
csname := csvserver["name"].(string)
result = append(result, csname)
}
return result
}
func ListBoundPolicies(csvserverName string) ([]string, []int) {
result, err := listBoundResources(csvserverName, "csvserver", "cspolicy", "", "")
ret1 := []string{}
ret2 := []int{}
if err != nil {
log.Println("No bindings for CS Vserver %s", csvserverName)
return ret1, ret2
}
var data map[string]interface{}
if err := json.Unmarshal(result, &data); err != nil {
log.Println("Failed to unmarshal Netscaler Response!")
return ret1, ret2
}
if data["csvserver_cspolicy_binding"] == nil {
return ret1, ret2
}
bindings := data["csvserver_cspolicy_binding"].([]interface{})
for _, b := range bindings {
binding := b.(map[string]interface{})
pname := binding["policyname"].(string)
prio, err := strconv.Atoi(binding["priority"].(string))
if err != nil {
continue
}
ret1 = append(ret1, pname)
ret2 = append(ret2, prio)
}
sort.Ints(ret2)
return ret1, ret2
}
func ListBoundPolicy(csvserverName string, policyName string) map[string]int {
result, err := listBoundResources(csvserverName, "csvserver", "cspolicy", "policyname", policyName)
if err != nil {
log.Println("No bindings for CS Vserver %s policy %", csvserverName, policyName)
return map[string]int{}
}
var data map[string]interface{}
if err := json.Unmarshal(result, &data); err != nil {
log.Println("Failed to unmarshal Netscaler Response!")
return map[string]int{}
}
ret := make(map[string]int)
if data["csvserver_cspolicy_binding"] == nil {
return ret
}
bindings := data["csvserver_cspolicy_binding"].([]interface{})
for _, b := range bindings {
binding := b.(map[string]interface{})
pname := binding["policyname"].(string)
prio := binding["priority"].(string)
ret[pname], _ = strconv.Atoi(prio)
}
return ret
}
func ListPolicyAction(policyName string) string {
result, err := listResource("cspolicy", policyName)
if err != nil {
log.Println("No policy %s", policyName)
return ""
}
var data map[string]interface{}
if err := json.Unmarshal(result, &data); err != nil {
log.Println("Failed to unmarshal Netscaler Response!")
return ""
}
policy := data["cspolicy"].([]interface{})[0]
return policy.(map[string]interface{})["action"].(string)
}
func ListLbVserverForAction(actionName string) (string, error) {
result, err := listResource("csaction", actionName)
if err != nil {
log.Println("No action %s", actionName)
return "", errors.New("No action " + actionName)
}
var data map[string]interface{}
if err := json.Unmarshal(result, &data); err != nil {
log.Println("Failed to unmarshal Netscaler Response!")
return "", errors.New("Failed to unmarshal Netscaler response")
}
action := data["csaction"].([]interface{})[0]
return action.(map[string]interface{})["targetlbvserver"].(string), nil
}
func DeleteCsPolicies(csvserverName string, policyNames []string) {
for _, policyName := range policyNames {
//unbind the content switch policy from the content switching vserver
resourceType := "csvserver_cspolicy_binding"
_, err := unbindResource(resourceType, csvserverName, "policyName", policyName)
if err != nil {
log.Fatal(fmt.Sprintf("Failed to unbind Content Switching Policy %s fromo Content Switching VServer %s, err=%s", policyName, csvserverName, err))
return
}
resourceType = "cspolicy"
//if there was an action in the policy, find that action
action := ListPolicyAction(policyName)
//delete the content switch policy that uses the action
resourceType = "cspolicy"
_, err = deleteResource(resourceType, policyName)
if err != nil {
log.Fatal(fmt.Sprintf("Failed to delete Content Switching Policy %s, err=%s", policyName, err))
return
}
_, err = deleteResource("csaction", action)
if err != nil {
log.Fatal(fmt.Sprintf("Failed to delete Content Switching Policy Action%s, err=%s", action, err))
return
}
}
}
func ListBoundServicesForLB(lbName string) ([]string, error) {
result, err := listBoundResources(lbName, "lbvserver", "service", "", "")
ret := []string{}
if err != nil {
log.Println("No bindings for LB Vserver %s", lbName)
return ret, nil
}
var data map[string]interface{}
if err := json.Unmarshal(result, &data); err != nil {
log.Println("Failed to unmarshal Netscaler Response!")
return ret, errors.New("Failed to unmarshal Netscaler response")
}
if data["lbvserver_service_binding"] == nil {
return ret, nil
}
bindings := data["lbvserver_service_binding"].([]interface{})
for _, b := range bindings {
binding := b.(map[string]interface{})
sname := binding["servicename"].(string)
ret = append(ret, sname)
}
return ret, nil
}
func FindResource(resourceType string, resourceName string) bool {
_, err := listResource(resourceType, resourceName)
if err != nil {
log.Printf("No %s %s found", resourceType, resourceName)
return false
}
log.Printf("%s %s is alredy present", resourceType, resourceName)
return true
}
func FindBoundResource(resourceType string, resourceName string, boundResourceType string, boundResourceFilterName string, boundResourceFilterValue string) bool {
result, err := listBoundResources(resourceName, resourceType, boundResourceType, boundResourceFilterName, boundResourceFilterValue)
if err != nil {
log.Printf("No %s %s to %s %s binding found", resourceType, resourceName, boundResourceType, boundResourceFilterValue)
return false
}
var data map[string]interface{}
if err := json.Unmarshal(result, &data); err != nil {
log.Println("Failed to unmarshal Netscaler Response!")
return false
}
if data[fmt.Sprintf("%s_%s_binding", resourceType, boundResourceType)] == nil {
return false
}
log.Printf("%s %s is alredy bound to %s %s", resourceType, resourceName, boundResourceType, boundResourceFilterValue)
return true
}