/
diff.go
255 lines (216 loc) · 6.71 KB
/
diff.go
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package worker
import (
"fmt"
"github.com/CleverTap/cfstack/internal/pkg/aws/cloudformation"
"github.com/CleverTap/cfstack/internal/pkg/aws/s3"
"github.com/CleverTap/cfstack/internal/pkg/aws/session"
"github.com/CleverTap/cfstack/internal/pkg/stack"
"github.com/Jeffail/gabs"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/fatih/color"
"github.com/golang/glog"
"github.com/pkg/errors"
"os"
"sort"
"strings"
"sync"
"time"
)
var (
MaxWorker = 50
MinWorker = 1
)
type RegionDiffWorkerJob struct {
Region string
Stacks []stack.Stack
Profile string
StackDiffWorker int
Uid string
TemplatesRoot string
Values *gabs.Container
Role string
}
type RegionDiffWorkerResult struct {
Region string
Stacks []stack.Stack
Err error
}
type StackDiffJob struct {
Stack *stack.Stack
}
type stackDiffWorkerJob struct {
region string
bucket string
stack stack.Stack
}
type stackDiffWorkerResult struct {
Stack stack.Stack
Err error
}
func RegionDiffWorker(id int, wg *sync.WaitGroup, regionWorkerJobs <-chan RegionDiffWorkerJob, regionWorkerResults chan<- *RegionDiffWorkerResult) {
var errResult error
for regionWorkerJob := range regionWorkerJobs {
//glog.Infof("region-worker-%d: starting diff for stacks in in region %s\n", id, regionWorkerJob.Region)
region := regionWorkerJob.Region
profile := regionWorkerJob.Profile
templateRoot := regionWorkerJob.TemplatesRoot
values := regionWorkerJob.Values
role := regionWorkerJob.Role
stacks := regionWorkerJob.Stacks
out := make([]stack.Stack, 0)
sess, err := session.NewSession(&session.Opts{
Profile: profile,
Region: region,
})
if err != nil {
regionWorkerResults <- &RegionDiffWorkerResult{
Region: region,
Stacks: out,
Err: err,
}
wg.Done()
}
uploader := s3.New(sess)
deployer := cloudformation.New(sess, values)
bucket, err := deployer.GetStackResourcePhysicalId("cfstack-Init", "TemplatesS3Bucket")
if err != nil {
regionWorkerResults <- &RegionDiffWorkerResult{
Region: region,
Stacks: out,
Err: err,
}
wg.Done()
}
stackDiffWorkerJobs := make(chan stackDiffWorkerJob, len(stacks))
stackDiffWorkerResults := make(chan *stackDiffWorkerResult, len(stacks))
// start workers
stackDiffWorkerWaitGroup := sync.WaitGroup{}
workers := regionWorkerJob.StackDiffWorker
if len(stacks) < MaxWorker {
workers = len(stacks)
}
for i := 1; i <= workers; i++ {
go stackDiffWorker(i, &stackDiffWorkerWaitGroup, stackDiffWorkerJobs, stackDiffWorkerResults)
}
limiter := time.Tick(50 * time.Millisecond)
for i, s := range stacks {
<-limiter
s.SetRegion(regionWorkerJob.Region)
s.SetUuid(regionWorkerJob.Uid)
s.SetBucket(bucket)
s.SetDeploymentOrder(i)
s.TemplateRootPath = templateRoot
s.Changes = &cloudformation.Changes{
Status: "",
StatusReason: "",
Resources: []cloudformation.ChangeResource{},
StackPolicyChange: false,
}
s.Uploader = uploader
s.Deployer = deployer
s.RoleArn = role
stackDiffWorkerJobs <- stackDiffWorkerJob{
region: region,
bucket: bucket,
stack: s,
}
stackDiffWorkerWaitGroup.Add(1)
}
close(stackDiffWorkerJobs)
stackDiffWorkerWaitGroup.Wait()
for n := 0; n < len(stacks); n++ {
select {
case diffWorkerResult := <-stackDiffWorkerResults:
err := diffWorkerResult.Err
s := diffWorkerResult.Stack
if err != nil {
if strings.Contains(err.Error(), "No updates are to be performed") {
continue
}
s.Changes.Status = stack.DiffFailStatus
s.Changes.StatusReason = err.Error()
if aerr, ok := err.(awserr.Error); ok {
s.Changes.StatusReason = aerr.Message()
switch aerr.Code() {
case "ValidationError":
if strings.Contains(aerr.Message(), "IN_PROGRESS") {
color.New(color.FgYellow).Fprintf(os.Stdout, " %s\n", aerr.Message())
s.Changes.Status = stack.DiffUnknownStatus
s.Changes.StatusReason = aerr.Message()
} else {
s.Changes.StatusReason = fmt.Sprintf("Unhandled AWS ValidationError for stack %s\n%s", s.StackName, aerr.Message())
}
default:
}
}
if s.Changes.Status == stack.DiffFailStatus {
color.New(color.FgRed).Fprintf(os.Stdout, " diff failed for stack %s : %v\n", s.StackName, s.Changes.StatusReason)
errResult = fmt.Errorf("diff for few stacks in %s region has failed", region)
}
out = append(out, s)
continue
}
if s.Changes.StackPolicyChange || s.Changes.ForceStackUpdate || len(s.Changes.Resources) > 0 {
s.Changes.Status = stack.DiffSuccessStatus
out = append(out, s)
}
}
}
sort.Slice(out, func(i, j int) bool {
return out[i].DeploymentOrder < out[j].DeploymentOrder
})
regionWorkerResults <- &RegionDiffWorkerResult{
Region: region,
Stacks: out,
Err: errResult,
}
//glog.Infof("region-worker-%d: finishing diff for stacks in in region %s\n", id, regionWorkerJob.Region)
wg.Done()
}
}
func stackDiffWorker(id int, waitGroup *sync.WaitGroup, stackDiffWorkerJobs <-chan stackDiffWorkerJob, stackDiffWorkerResults chan<- *stackDiffWorkerResult) {
for diffWorkerJob := range stackDiffWorkerJobs {
s := diffWorkerJob.stack
//glog.Infof("worker-%d: fetching diff for stack %s in region %s\n", id, s.StackName, s.Region)
timeout := time.After(24 * time.Hour)
ticker := time.Tick(10 * time.Second)
diffComplete := false
for diffComplete == false {
select {
case <-timeout:
stackDiffWorkerResults <- &stackDiffWorkerResult{Err: errors.New("too many AWS API calls. Try again later")}
case <-ticker:
err := s.Diff()
if err != nil {
if aerr, ok := err.(awserr.Error); ok {
switch aerr.Code() {
case "Throttling":
glog.Warningf("AWS rate limit error for stack %s, retrying..", s.StackName)
continue
case "ValidationError":
if strings.Contains(aerr.Message(), "S3 error: Access Denied") {
glog.Warningf("AWS request error for stack %s, retrying..", s.StackName)
continue
}
case "RequestError":
glog.Warningf("AWS request error for stack %s - %s, retrying..", s.StackName, aerr.Message())
continue
case "ChangeSetNotFound":
glog.Warningf("Looks like changeset not found for stack %s, retrying..", s.StackName)
continue
default:
glog.Errorf("unhandled AWS error for stack %s\n%s : %s", s.StackName, aerr.Code(), aerr.Message())
}
}
}
stackDiffWorkerResults <- &stackDiffWorkerResult{
Stack: s,
Err: err,
}
diffComplete = true
}
}
//glog.Infof("worker-%d: Received diff for stack %s in region %s\n", id, s.StackName, s.Region)
waitGroup.Done()
}
}