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cluster_ops.go
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cluster_ops.go
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package supervisor
import (
"bytes"
"encoding/json"
"fmt"
"io/ioutil"
"math"
"net"
"net/url"
"strings"
"time"
"github.com/couchbase/cbauth"
"github.com/couchbase/eventing/common"
couchbase "github.com/couchbase/eventing/dcp"
"github.com/couchbase/eventing/logging"
"github.com/couchbase/eventing/util"
"github.com/couchbase/gocb/v2"
)
var getHTTPServiceAuth = func(args ...interface{}) error {
logPrefix := "SuperSupervisor::getHTTPServiceAuth"
s := args[0].(*SuperSupervisor)
user := args[1].(*string)
password := args[2].(*string)
var err error
clusterURL := net.JoinHostPort(util.Localhost(), s.restPort)
*user, *password, err = cbauth.GetHTTPServiceAuth(clusterURL)
if err != nil {
logging.Errorf("%s Failed to get cluster auth details, err: %v", logPrefix, err)
}
return err
}
var metakvGetCallback = func(args ...interface{}) error {
logPrefix := "SuperSupervisor::metakvGetCallback"
s := args[0].(*SuperSupervisor)
path := args[1].(string)
cfgData := args[2].(*[]byte)
var err error
*cfgData, err = util.MetakvGet(path)
if err != nil {
logging.Errorf("%s [%d] Failed to lookup path: %v from metakv, err: %v", logPrefix, s.runningFnsCount(), path, err)
}
return err
}
var metakvAppCallback = func(args ...interface{}) error {
logPrefix := "SuperSupervisor::metakvAppCallback"
s := args[0].(*SuperSupervisor)
appPath := args[1].(string)
checksumPath := args[2].(string)
appName := args[3].(string)
cfgData := args[4].(*[]byte)
var err error
*cfgData, err = util.ReadAppContent(appPath, checksumPath, appName)
if err != nil {
logging.Errorf("%s [%d] Failed to lookup path: %v from metakv, err: %v", logPrefix, s.runningFnsCount(), appPath, err)
return err
}
if len(*cfgData) == 0 {
logging.Errorf("%s [%s:%d] Looked up path: %v from metakv, but got empty value", logPrefix, s.runningFnsCount(), appPath)
return fmt.Errorf("Empty value from metakv lookup")
}
return nil
}
var metakvDeleteCallback = func(args ...interface{}) error {
logPrefix := "SuperSupervisor::metakvDeleteCallback"
s := args[0].(*SuperSupervisor)
path := args[1].(string)
err := util.MetaKvDelete(path, nil)
if err != nil {
logging.Errorf("%s [%d] Unable to delete %s, err: %v",
logPrefix, s.runningFnsCount(), path, err)
}
return err
}
var undeployFunctionCallback = func(args ...interface{}) error {
logPrefix := "SuperSupervisor::undeployFunctionCallback"
s := args[0].(*SuperSupervisor)
appName := args[1].(string)
deleteFunction := args[2].(bool)
id, _ := common.GetIdentityFromLocation(appName)
functionId, err := s.getFunctionId(id)
if err == util.AppNotExist {
return nil
}
settings := make(map[string]interface{})
settings["deployment_status"] = false
settings["processing_status"] = false
data, err := json.Marshal(&settings)
if err != nil {
logging.Errorf("%s [%d] Function: %s failed to marshal settings", logPrefix, s.runningFnsCount(), appName)
return err
}
client := util.NewClient(5 * time.Second)
serverAddress := net.JoinHostPort(util.Localhost(), s.adminPort.HTTPPort)
settingsUrl := fmt.Sprintf("http://%s/setSettings/?name=%s&force=true", serverAddress, url.QueryEscape(appName))
resp, err := client.Post(settingsUrl, "application/json", bytes.NewBuffer(data))
if err != nil {
logging.Errorf("%s [%d] Function: %s failed to send http request", logPrefix, s.runningFnsCount(), appName)
return err
}
defer resp.Body.Close()
content, err := ioutil.ReadAll(resp.Body)
if err != nil {
logging.Errorf("%s [%d] Function: %s failed to read content", logPrefix, s.runningFnsCount(), appName)
return err
}
logging.Infof("%s [%d] Function: %s response from server: %s resp: %rs", logPrefix, s.runningFnsCount(), appName, string(content), resp)
if deleteFunction {
util.Retry(util.NewFixedBackoff(5*time.Second), &s.retryCount, waitForStateChange, s, id, "undeployed", functionId)
util.Retry(util.NewExponentialBackoff(), &s.retryCount, deleteFunctionCallback, s, id, functionId)
}
return nil
}
var deleteFunctionCallback = func(args ...interface{}) error {
logPrefix := "SuperSupervisor::deleteFunctionCallback"
s := args[0].(*SuperSupervisor)
id := args[1].(common.Identity)
functionId := args[2].(uint32)
client := util.NewClient(5 * time.Second)
serverAddress := net.JoinHostPort(util.Localhost(), s.adminPort.HTTPPort)
deleteUrl := fmt.Sprintf("http://%s/api/v1/functions/%s?bucket=%s&scope=%s&handleruuid=%s", serverAddress,
url.QueryEscape(id.AppName), url.QueryEscape(id.Bucket), url.QueryEscape(id.Scope), functionId)
resp, err := client.Delete(deleteUrl)
if err != nil {
logging.Errorf("%s [%d] Function: %s failed to send http request", logPrefix, s.runningFnsCount(), id)
return err
}
defer resp.Body.Close()
content, err := ioutil.ReadAll(resp.Body)
if err != nil {
logging.Errorf("%s [%d] Function: %s failed to read content", logPrefix, s.runningFnsCount(), id)
return err
}
logging.Infof("%s [%d] Function: %s response from server: %s resp: %rs", logPrefix, s.runningFnsCount(), id, string(content), resp)
return nil
}
type AppStatus struct {
CompositeStatus string `json:"composite_status"`
}
type StatusResponse struct {
App AppStatus `json:"app"`
Code int `json:"code"`
}
var waitForStateChange = func(args ...interface{}) error {
logPrefix := "SuperSupervisor::WaitForStateChange"
s := args[0].(*SuperSupervisor)
id := args[1].(common.Identity)
compositeStatus := args[2].(string)
functionId := args[3].(uint32)
client := util.NewClient(5 * time.Second)
serverAddress := net.JoinHostPort(util.Localhost(), s.adminPort.HTTPPort)
statusUrl := fmt.Sprintf("http://%s/api/v1/status/%s?bucket=%s&scope=%s", serverAddress,
url.QueryEscape(id.AppName), url.QueryEscape(id.Bucket), url.QueryEscape(id.Scope))
resp, err := client.Get(statusUrl)
if err != nil {
logging.Errorf("%s [%d] Function: %s failed to send http request", logPrefix, s.runningFnsCount(), id)
return err
}
defer resp.Body.Close()
content, err := ioutil.ReadAll(resp.Body)
if err != nil {
logging.Errorf("%s [%d] Function: %s failed to read content err: %v", logPrefix, s.runningFnsCount(), id, err)
return err
}
statusResponse := &StatusResponse{}
err = json.Unmarshal(content, statusResponse)
if err != nil {
logging.Errorf("%s [%d] Function: %s failed to read content err: %v", logPrefix, s.runningFnsCount(), id, err)
return err
}
// Return nil if app is not present or apps composite status is required status
if statusResponse.Code == 13 || statusResponse.App.CompositeStatus == compositeStatus {
return nil
}
currentId, err := s.getFunctionId(id)
// App is already deleted or recreated by the user in that case exit
// TODO: Make status handler to accept the functionId
if err == util.AppNotExist || currentId != functionId {
return nil
}
return fmt.Errorf("%s [%d] Function: %s response from server: %s resp: %rs", logPrefix, id, statusResponse)
}
var commonConnectBucketOpCallback = func(args ...interface{}) error {
logPrefix := "Supervisor::commonConnectBucketOpCallback"
b := args[0].(**couchbase.Bucket)
bucketName := args[1].(string)
restPort := args[2].(string)
hostPortAddr := net.JoinHostPort(util.Localhost(), restPort)
var err error
*b, _, err = util.ConnectBucket(hostPortAddr, "default", bucketName)
if err != nil {
logging.Errorf("%s: Unable to connect to bucket: %s err: %v", logPrefix, bucketName, err)
} else {
logging.Infof("%s: Connected to bucket: %s", logPrefix, bucketName)
}
return err
}
var gocbConnectCluster = func(args ...interface{}) error {
logPrefix := "Supervisor::gocbConnectCluster"
sup := args[0].(*SuperSupervisor)
gocbCluster := args[1].(**gocb.Cluster)
restPort := args[2].(string)
securitySetting := args[3].(*common.SecuritySetting)
operr := args[4].(*error)
hostPortAddr := net.JoinHostPort(util.Localhost(), restPort)
cic, err := util.FetchClusterInfoClient(hostPortAddr)
if err != nil {
logging.Errorf("%s Failed to get cluster info cache, err : %v", logPrefix, err)
return err
}
cinfo := cic.GetClusterInfoCache()
cinfo.RLock()
kvNodes, err := cinfo.GetAddressOfActiveKVNodes()
cinfo.RUnlock()
if err != nil {
logging.Errorf("%s Failed to get KV nodes addresses, err : %v", logPrefix, err)
return err
}
connStr := "couchbase://"
for index, kvNode := range kvNodes {
if index != 0 {
connStr = connStr + ","
}
connStr = connStr + kvNode
}
connStr += "?network=default"
if util.IsIPv6() {
connStr += "&ipv6=allow"
}
authenticator := &util.DynamicAuthenticator{Caller: logPrefix}
clusterOptions := gocb.ClusterOptions{Authenticator: authenticator}
if securitySetting != nil && securitySetting.EncryptData == true {
clusterOptions.SecurityConfig = gocb.SecurityConfig{TLSRootCAs: securitySetting.RootCAs}
connStr = strings.ReplaceAll(connStr, "couchbase://", "couchbases://")
}
cluster, err := gocb.Connect(connStr, clusterOptions)
if err != nil {
if sup.EncryptionChangedDuringLifecycle() {
*operr = common.ErrEncryptionLevelChanged
return nil
}
logging.Errorf("%s Connect to cluster %rs failed, err: %v",
logPrefix, connStr, err)
return err
}
*gocbCluster = cluster
return nil
}
var gocbConnectBucket = func(args ...interface{}) error {
logPrefix := "Supervisor::gocbConnectBucket"
sup := args[0].(*SuperSupervisor)
bucketHandle := args[1].(**gocb.Bucket)
cluster := args[2].(*gocb.Cluster)
bucketName := args[3].(string)
hostPortAddr := args[4].(string)
bucketNotExist := args[5].(*bool)
operr := args[6].(*error)
bucket := cluster.Bucket(bucketName)
cic, err := util.FetchClusterInfoClient(hostPortAddr)
if err != nil {
logging.Errorf("%s Failed to get cluster info cache, err : %v", logPrefix, err)
return err
}
cinfo := cic.GetClusterInfoCache()
cinfo.RLock()
kvNodes, err := cinfo.GetAddressOfActiveKVNodes()
cinfo.RUnlock()
if err != nil {
logging.Errorf("%s Failed to get KV nodes addresses, err : %v", logPrefix, err)
return err
}
bucketWaitTime := time.Duration(math.Max(float64(len(kvNodes)), 5))
err = bucket.WaitUntilReady(bucketWaitTime*time.Second, nil)
if err != nil {
if sup.EncryptionChangedDuringLifecycle() {
*operr = common.ErrEncryptionLevelChanged
return nil
}
if !util.CheckBucketExist(bucketName, hostPortAddr) {
*bucketNotExist = true
return nil
}
logging.Errorf("%s Failed to connect to bucket %s, err: %v",
logPrefix, bucketName, err)
return err
}
*bucketHandle = bucket
return nil
}