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main.go
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main.go
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package main
import (
"context"
"fmt"
"log"
"net/http"
"regexp"
"strings"
"cloud.google.com/go/compute/metadata"
"github.com/PuerkitoBio/rehttp"
"golang.org/x/oauth2/google"
"google.golang.org/api/compute/v1"
"google.golang.org/api/option"
"gopkg.in/alecthomas/kingpin.v2"
"google.golang.org/api/cloudresourcemanager/v1"
)
var (
from = kingpin.Flag(
"from", "The environment to compare from",
).Envar("GCP_QUOTA_COMPARER_FROM").Required().String()
to = kingpin.Flag(
"to", "The environment to compare to",
).Envar("GCP_QUOTA_COMPARER_TO").Required().String()
regexFrom = kingpin.Flag(
"regex.from", "The regex to use to match against the source projects.",
).Envar("GCP_QUOTA_COMPARER_REGEX_FROM").Default(`prj-\w+-(?P<Name>.*)-[a-zA-Z0-9]{4}$`).String()
regexTo = kingpin.Flag(
"regex.to", "The regex to use to match against the target project.",
).Envar("GCP_QUOTA_COMPARER_REGEX_TO").Default(`prj-\w+-%s-[a-zA-Z0-9]{4}$`).String()
gcpMaxRetries = kingpin.Flag(
"gcp.max-retries", "Max number of retries that should be attempted on 503 errors from gcp. ($GCP_EXPORTER_MAX_RETRIES)",
).Envar("GCP_QUOTA_COMPARER_MAX_RETRIES").Default("0").Int()
gcpHttpTimeout = kingpin.Flag(
"gcp.http-timeout", "How long should gcp_exporter wait for a result from the Google API ($GCP_EXPORTER_HTTP_TIMEOUT)",
).Envar("GCP_QUOTA_COMPARER_HTTP_TIMEOUT").Default("10s").Duration()
gcpMaxBackoffDuration = kingpin.Flag(
"gcp.max-backoff", "Max time between each request in an exp backoff scenario ($GCP_EXPORTER_MAX_BACKOFF_DURATION)",
).Envar("GCP_QUOTA_COMPARER_MAX_BACKOFF_DURATION").Default("5s").Duration()
gcpBackoffJitterBase = kingpin.Flag(
"gcp.backoff-jitter", "The amount of jitter to introduce in a exp backoff scenario ($GCP_EXPORTER_BACKOFF_JITTER_BASE)",
).Envar("GCP_QUOTA_COMPARER_BACKOFF_JITTER_BASE").Default("1s").Duration()
gcpRetryStatuses = kingpin.Flag(
"gcp.retry-statuses", "The HTTP statuses that should trigger a retry ($GCP_EXPORTER_RETRY_STATUSES)",
).Envar("GCP_QUOTA_COMPARER_RETRY_STATUSES").Default("503").Ints()
)
type Quotas struct {
projectId string
project *compute.Project
regionList *compute.RegionList
}
type Issue struct {
fromProjectId string
toProjectId string
region string
metric string
fromLimit float64
toLimit float64
}
func GetQuotas(projectId string) (error, *Quotas) {
// Create context and generate compute.Service
ctx := context.Background()
googleClient, err := google.DefaultClient(ctx, compute.ComputeReadonlyScope)
if err != nil {
return fmt.Errorf("Error creating Google client: %v", err), nil
}
googleClient.Timeout = *gcpHttpTimeout
googleClient.Transport = rehttp.NewTransport(
googleClient.Transport, // need to wrap DefaultClient transport
rehttp.RetryAll(
rehttp.RetryMaxRetries(*gcpMaxRetries),
rehttp.RetryStatuses(*gcpRetryStatuses...)), // Cloud support suggests retrying on 503 errors
rehttp.ExpJitterDelay(*gcpBackoffJitterBase, *gcpMaxBackoffDuration), // Set timeout to <10s as that is prom default timeout
)
computeService, err := compute.NewService(ctx, option.WithHTTPClient(googleClient))
if err != nil {
log.Fatalf("Failure when getting compute service: %v", err)
}
project, err := computeService.Projects.Get(projectId).Do()
if err != nil {
log.Printf("Failure when querying project quotas: %v", err)
return nil, nil
}
regionList, err := computeService.Regions.List(projectId).Do()
if err != nil {
log.Printf("Failure when querying region quotas: %v", err)
regionList = nil
}
return nil, &Quotas{
projectId,
project,
regionList,
}
}
func GetProjects(query string) ([]*cloudresourcemanager.Project, error) {
// Create context and generate compute.Service
ctx := context.Background()
cloudresourcemanagerService, err := cloudresourcemanager.NewService(ctx)
if err != nil {
return nil, err
}
// needs to be active because we don't want to query inactive projects
filter := strings.Join([]string{"lifecycleState:ACTIVE", query}, " ")
log.Printf("Project filter: %v", filter)
projectQuery := cloudresourcemanagerService.Projects.List().Filter(filter)
response, err := projectQuery.Do()
if err != nil {
return nil, err
}
projects := response.Projects
// log.Printf("Retrieved project list: %v", projects)
return projects, nil
}
func GetProjectIds(p []*cloudresourcemanager.Project) []string {
var list []string
for _, project := range p {
list = append(list, project.ProjectId)
}
return list
}
func GetProjectIdFromMetadata() (string, error) {
client := metadata.NewClient(&http.Client{})
project_id, err := client.ProjectID()
if err != nil {
return "", err
}
return project_id, nil
}
func main() {
kingpin.Version("0.1.0")
kingpin.Parse()
fromProjects, err := GetProjects(*from)
issues := []Issue{}
if err != nil {
log.Fatal(err)
}
toProjects, err := GetProjects(*to)
if err != nil {
log.Fatal(err)
}
for _, fromProject := range fromProjects {
r := regexp.MustCompile(*regexFrom)
projectNameMatch := r.FindStringSubmatch(fromProject.ProjectId)
projectName := projectNameMatch[1]
var toProjectFound *cloudresourcemanager.Project
r1 := regexp.MustCompile(fmt.Sprintf(*regexTo, projectName))
err, fromProjectQuotas := GetQuotas(fromProject.ProjectId)
if err != nil {
log.Fatalf("Error with project %s: %s", fromProject.ProjectId, err)
}
for _, toProject := range toProjects {
toProjectId := toProject.ProjectId
if r1.MatchString(toProjectId) {
toProjectFound = toProject
break
}
}
if toProjectFound != nil {
// log.Printf("Checking %s against %s...", fromProject.ProjectId, toProjectFound.ProjectId)
err, toProjectQuotas := GetQuotas(toProjectFound.ProjectId)
if err != nil {
log.Fatalf("Error with project %s: %s", fromProject.ProjectId, err)
}
for _, fromProjectQuota := range fromProjectQuotas.project.Quotas {
fromProjectQuotaMetric := fromProjectQuota.Metric
fromProjectQuotaLimit := fromProjectQuota.Limit
var toProjectQuota *compute.Quota = nil
for i := range toProjectQuotas.project.Quotas {
if toProjectQuotas.project.Quotas[i].Metric == fromProjectQuotaMetric {
toProjectQuota = toProjectQuotas.project.Quotas[i]
break
}
}
if toProjectQuota == nil {
log.Printf("[%s]: Metric %s does not exist", fromProject.ProjectId, fromProjectQuotaMetric)
continue
}
toProjectQuotaMetric := toProjectQuota.Metric
toProjectQuotaLimit := toProjectQuota.Limit
if toProjectQuotaLimit != fromProjectQuotaLimit {
log.Printf("[%s] [%s] (%f) limit differs from [%s] [%s] (%f)", fromProject.ProjectId, fromProjectQuotaMetric, fromProjectQuotaLimit, toProjectFound.ProjectId, toProjectQuotaMetric, toProjectQuotaLimit)
issues = append(issues, Issue{
fromProjectId: fromProject.Name,
toProjectId: toProjectFound.Name,
metric: fromProjectQuotaMetric,
fromLimit: fromProjectQuotaLimit,
toLimit: toProjectQuotaLimit,
})
}
}
// check regions
for _, fromRegion := range fromProjectQuotas.regionList.Items {
fromRegionName := fromRegion.Name
var toRegionFound *compute.Region = nil
for _, toRegion := range toProjectQuotas.regionList.Items {
toRegionName := toRegion.Name
if toRegionName == fromRegionName {
toRegionFound = toRegion
break
}
}
if toRegionFound == nil {
log.Printf("[%s]: Region %s does not exist", fromProject.ProjectId, fromRegionName)
continue
}
// log.Printf("Checking %s/%s against %s/%s...", fromProject.ProjectId, fromRegionName, toProjectFound.ProjectId, toRegionFound.Name)
for _, fromRegionQuota := range fromRegion.Quotas {
fromRegionQuotaMetric := fromRegionQuota.Metric
fromRegionQuotaLimit := fromRegionQuota.Limit
var toRegionQuotaFound *compute.Quota = nil
for i := range toRegionFound.Quotas {
if toRegionFound.Quotas[i].Metric == fromRegionQuotaMetric {
toRegionQuotaFound = toRegionFound.Quotas[i]
break
}
}
if toRegionQuotaFound == nil {
log.Printf("[%s]/%s: Metric %s does not exist", fromProject.ProjectId, toRegionFound.Name, fromRegionQuotaMetric)
continue
}
toRegionQuotaMetric := toRegionQuotaFound.Metric
toRegionQuotaLimit := toRegionQuotaFound.Limit
if toRegionQuotaLimit != fromRegionQuotaLimit {
log.Printf("[%s/%s] [%s] (%f) limit differs from [%s/%s] [%s] (%f)", fromProject.ProjectId, fromRegionName, fromRegionQuotaMetric, fromRegionQuotaLimit, toProjectFound.ProjectId, toRegionFound.Name, toRegionQuotaMetric, toRegionQuotaLimit)
issues = append(issues, Issue{
fromProjectId: fromProject.Name,
toProjectId: toProjectFound.Name,
region: fromRegionName,
metric: fromRegionQuotaMetric,
fromLimit: fromRegionQuotaLimit,
toLimit: toRegionQuotaLimit,
})
}
}
}
}
}
}