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cf-utils.go
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cf-utils.go
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package cf_utils
import (
"bytes"
"encoding/json"
"fmt"
"os"
"strconv"
"strings"
"time"
"io/ioutil"
"net/http"
"crypto/tls"
"github.com/cf-platform-eng/autoscaler/uaac"
)
const TOKEN_VALIDITY_DURATION int64 = 1800
var (
auth_token string
token_obtained int64
cf_api_endpoint string
uaaEnv uaac.UAAEnvironment
DEBUG = false
orgGuidMap = make(map[string]string)
spaceGuidMap = make(map[string]string)
appGuidMap = make(map[string]string)
)
func init() {
// json parsing will get screwed up if CF_TRACE is enabled that would emit non-json contents
if debug_log := os.Getenv("DEBUG_CF"); debug_log != "" {
DEBUG = true
}
uaaEnv = uaac.UaaEnvironment()
//cf_api_endpoint = uaaEnv.Scheme + "://api." + uaaEnv.Domain
cf_api_endpoint = "https://api." + uaaEnv.Domain
refreshAuthToken()
}
func logDebug(msg string) {
if (DEBUG) {
fmt.Println("CF: " + msg)
}
}
/*
func cf_curl_authorization_header() string{
//return fmt.Sprintf(" -H 'Authorization: bearer %s'", UAAToken())
return fmt.Sprintf(" -H 'Authorization: bearer %s'", UAAToken())
}
func setup_using_cli() {
setupCfCli()
setupCfTarget("api.10.244.0.34.xip.io", "admin", "admin")
os.Setenv("CF_TRACE", "false")
var out bytes.Buffer
cmd := exec.Command("cf", "target")
cmd.Stdout = &out
err := cmd.Run()
if err != nil {
log.Fatal("CF Target not set \n", err)
os.Exit(-1)
}
//var byteArr []byte
targetStatus := string(out.Bytes())
tokens := strings.Split(targetStatus, "\n")
for _, token := range tokens {
if strings.HasPrefix(token, "API endpoint") {
api_endpoint = strings.Fields(token)[2]
fmt.Println("API Endpoint : " + api_endpoint)
} else if strings.HasPrefix(token, "User") {
user := strings.Fields(token)[1]
fmt.Println("Authenticated User : " + user)
}
}
fmt.Println("Finished initializing cf client...\n")
}
func setupCfCli() {
os.Setenv("APP_DIR", "/home/vcap/app")
var out bytes.Buffer
cmd := exec.Command("tar", "-C $APP_DIR/bin/ zxvf $APP_DIR/lib/cf-linux*.tgz")
cmd.Stdout = &out
err := cmd.Run()
if err != nil {
log.Fatal("Unable to locate or extract cf binary tar ball \n", err)
os.Exit(-1)
}
os.Setenv("PATH", "/home/vcap/app/bin:$PATH")
}
func setupCfTarget(cf_api_target string, cf_user string, cf_passwd string) {
os.Setenv("HOME", "/home/vcap")
var out bytes.Buffer
cmd := exec.Command("cf", " api" , cf_api_target, " --skip-ssl-validation")
cmd.Stdout = &out
err := cmd.Run()
if err != nil {
log.Fatal("Unable to set CF API Target to endpoint \n", err)
os.Exit(-1)
}
cmd = exec.Command("cf", " login" , "-u ", cf_user, " -p" , cf_passwd)
cmd.Stdout = &out
err = cmd.Run()
if err != nil {
log.Fatal("Unable to login into CF \n", err)
os.Exit(-1)
}
}
func invoke_cf_curl_get(resource string) []byte {
//EXECUTABLE := "cf"
//COMMAND := "curl"
EXECUTABLE := "curl"
OPTION := " -k "
ACTION := " -X GET"
HEADER1 := cf_curl_authorization_header()
HEADER2 := "-H 'Content-Type: application/x-www-form-urlencoded' "
ENDPOINT := cf_api_endpoint
VERSION := "/v2"
uri := ENDPOINT + VERSION + resource
var out bytes.Buffer
cmd := exec.Command(EXECUTABLE, OPTION, HEADER1, HEADER2, ACTION, uri)
cmd.Stdout = &out
fmt.Printf("\nCommand to Execute: %#v\n", cmd)
err := cmd.Run()
if err != nil {
fmt.Printf("\nError with invocation of cf curl: %s\n", err.Error())
log.Fatal(err)
}
//var response utils.SpaceResponse
//var response utils.SpaceSummaryResponse
var byteArr []byte
byteArr = out.Bytes()
DEBUG := true
if DEBUG {
fmt.Printf("\nInvoked Uri: %s\n", uri)
fmt.Printf("\nCommand Executed: %#v\n", cmd)
fmt.Printf("Output data: %s\n", byteArr)
}
return byteArr
}
func invoke_cf_curl_post(resource string, postData string) {
//EXECUTABLE := "cf"
//COMMAND := "curl"
EXECUTABLE := "curl"
OPTION := " -k "
ACTION := " -X POST"
HEADER := cf_curl_authorization_header()
ENDPOINT := cf_api_endpoint
VERSION := "/v2"
uri := ENDPOINT + VERSION + resource
payload := " -d " + postData
var out bytes.Buffer
cmd := exec.Command(EXECUTABLE, OPTION, ACTION, HEADER, uri, payload)
cmd.Stdout = &out
err := cmd.Run()
if err != nil {
log.Fatal(err)
}
}
/*
func FindAppInstances(appGuid string) int{
fmt.Printf("Inside FindAppInstances....")
byteArr := invoke_cf_curl_get("/apps/" + appGuid + "/summary" )
fmt.Printf("App Summary raw output is %s\n", byteArr)
//fmt.Printf("App Stats output is %v\n", response)
//fmt.Println("Instance Details for App: ", response["0"])
var appSummaryErrorResponse ErrorResponse
json.Unmarshal(byteArr, &appSummaryErrorResponse)
//fmt.Printf("App Error Stats output is %v\n", appStateErrorResponse)
//fmt.Printf("Error description %s", appStateErrorResponse.Description)
if (appSummaryErrorResponse.Description != "") {
var appDetailSummary AppDetail
json.Unmarshal(byteArr, &appDetailSummary)
fmt.Printf("Got App Summary : %v", appDetailSummary)
return appDetailSummary.Instances
}
return 0
}
*/
func refreshAuthToken() {
token, _ := uaac.UAAClient()
// Token comes with braces: { ... } , strip that
auth_token = fmt.Sprintf("%s", token)
auth_token = strings.Replace(auth_token, "{", "", -1)
auth_token = strings.Replace(auth_token, "}", "", -1)
logDebug(fmt.Sprintf("Auth Token: %s", auth_token))
logDebug(fmt.Sprintf("UAA Endpoint: %s", cf_api_endpoint))
token_obtained = time.Now().Unix()
}
func UAAToken() string {
// Refresh the Auth token if over 30 minutes duration
// By default, autoscaling_service has a duration of 3600 seconds
// Just to be safe, use 30 minutes as duration for custom client token
/*
autoscaling_service:
id: autoscaling_service
secret: "********"
override: true
autoapprove: true
authorities: cloud_controller.write,cloud_controller.read,cloud_controller.admin,notifications.write,critical_notifications.write,emails.write
authorized-grant-types: client_credentials,authorization_code,refresh_token
scope: openid,cloud_controller.permissions,cloud_controller.read,cloud_controller.write
access-token-validity: 3600
*/
if (time.Now().Unix() - token_obtained > TOKEN_VALIDITY_DURATION) {
refreshAuthToken()
}
return fmt.Sprintf("%s", auth_token)
}
func set_headers(req *http.Request) {
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
req.Header.Set("Authorization", " Bearer " + UAAToken())
}
func invoke_cf_get(resource string) []byte {
ENDPOINT := cf_api_endpoint
VERSION := "/v2"
uri := ENDPOINT + VERSION + resource
req, err := http.NewRequest("GET", uri, bytes.NewReader([]byte (resource)))
set_headers(req)
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
//req.Header.Set("Authorization", " Bearer " + UAAToken)
tr := &http.Transport{
TLSClientConfig: &tls.Config{InsecureSkipVerify : true},
}
client := &http.Client{Transport: tr}
resp, err := client.Do(req)
if err != nil {
panic(err)
}
defer resp.Body.Close()
body, _ := ioutil.ReadAll(resp.Body)
logDebug(fmt.Sprintf("Request: %v", req))
logDebug(fmt.Sprintf("Response Status: %d", resp.Status))
logDebug(fmt.Sprintf("Response Headers: %s", resp.Header))
logDebug(fmt.Sprintf("Response Body: %s", string(body)))
return body
}
func invoke_cf_with_payload(resource string, action string, postData string) {
ENDPOINT := cf_api_endpoint
VERSION := "/v2"
uri := ENDPOINT + VERSION + resource
req, err := http.NewRequest(action, uri, bytes.NewReader([]byte (postData)))
set_headers(req)
req.Header.Set("Content-Type", "application/json")
tr := &http.Transport{
TLSClientConfig: &tls.Config{InsecureSkipVerify : true},
}
client := &http.Client{Transport: tr}
resp, err := client.Do(req)
if err != nil {
panic(err)
}
defer resp.Body.Close()
_, _ = ioutil.ReadAll(resp.Body)
logDebug(fmt.Sprintf("Request: %v", req))
logDebug(fmt.Sprintf("Response Status: %d", resp.Status))
logDebug(fmt.Sprintf("Response Headers: %v", resp.Header))
return
}
func FindApp(orgName string, spaceName string, appName string) map[string]string {
var appGuidInstances map[string]string
orgGuid := orgGuidMap[orgName]
if orgGuid == "" {
orgGuid = findOrgGuid(orgName)
}
orgGuidMap[orgName] = orgGuid
if orgGuid != "" {
spaceGuid := spaceGuidMap[spaceName]
if spaceGuid == "" {
spaceGuid = findSpaceGuid(spaceName, orgGuid)
}
spaceGuidMap[spaceName] = spaceGuid
if spaceGuid != "" {
appGuidInstances = findApp(appName, spaceGuid)
appGuidMap[appName] = appGuidInstances["guid"]
return appGuidInstances
}
}
fmt.Printf("\nError!! App could not be located!\n")
return appGuidInstances
}
func ScaleApp(appName string, instances int) {
appGuid := appGuidMap[appName]
payload := fmt.Sprintf("{ \"instances\": %d }", instances)
invoke_cf_with_payload("/apps/" + appGuid, "PUT", payload)
}
func findOrgGuid(orgName string) string {
byteArr := invoke_cf_get("/organizations")
var errorResponse ErrorResponse
json.Unmarshal(byteArr, &errorResponse)
if errorResponse.Description == "" {
var response QueryResponse
json.Unmarshal(byteArr, &response)
for _, org := range response.Resources {
if orgName == org.Entity.Name {
return org.Metadata.Guid
}
}
}
fmt.Printf("Error!! Could not locate org matching: %s\n", orgName)
return ""
}
func findSpaceGuid(spaceName string, orgGuid string) string {
byteArr := invoke_cf_get("/organizations/" + orgGuid + "/spaces")
var response QueryResponse
json.Unmarshal(byteArr, &response)
for _, space := range response.Resources {
if spaceName == space.Entity.Name {
return space.Metadata.Guid
}
}
fmt.Printf("Error!! Could not locate space matching: %s\n", spaceName)
return ""
}
func findApp(appName string, spaceGuid string) map[string]string {
var result = make(map[string]string)
byteArr := invoke_cf_get("/spaces/" + spaceGuid + "/apps")
var response SpaceAppQueryResponse
json.Unmarshal(byteArr, &response)
//fmt.Printf("\n\nRaw Apps output is %s\n", byteArr)
for _, app := range response.Resources {
if appName == app.Entity.Name {
fmt.Printf("\nLocated App: %s, guid: %s, instances: %d\n", appName, app.Metadata.Guid, app.Entity.Instances)
var result = make(map[string]string)
result["guid"] = app.Metadata.Guid
result["instances"] = strconv.Itoa(app.Entity.Instances)
return result
}
}
fmt.Printf("Error!! Could not locate app matching: %s\n", appName)
return result
}