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PBM-1660 Add support for Workload Identity Authentication #1245

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PBM-1660 Add support for Workload Identity Authentication #1245

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4bf1133
PBM-1660 Add support for Workload Identity Authentication
ravisingal Jan 2, 2026
bf96331
Merge branch 'dev' into gcs-workload-identity-authentication
ravisingal Jan 9, 2026
f9e7d92
Merge branch 'dev' into gcs-workload-identity-authentication
ravisingal Jan 18, 2026
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45 changes: 24 additions & 21 deletions pbm/storage/gcs/google_client.go
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Original file line number Diff line number Diff line change
Expand Up @@ -27,29 +27,32 @@ type googleClient struct {

func newGoogleClient(cfg *Config, l log.LogEvent) (*googleClient, error) {
ctx := context.Background()

if cfg.Credentials.PrivateKey == "" || cfg.Credentials.ClientEmail == "" {
return nil, errors.New("clientEmail and privateKey are required for GCS credentials")
}

creds, err := json.Marshal(ServiceAccountCredentials{
Type: "service_account",
PrivateKey: cfg.Credentials.PrivateKey,
ClientEmail: cfg.Credentials.ClientEmail,
AuthURI: "https://accounts.google.com/o/oauth2/auth",
TokenURI: "https://oauth2.googleapis.com/token",
UniverseDomain: "googleapis.com",
AuthProviderCertURL: "https://www.googleapis.com/oauth2/v1/certs",
ClientCertURL: fmt.Sprintf(
"https://www.googleapis.com/robot/v1/metadata/x509/%s",
cfg.Credentials.ClientEmail,
),
})
if err != nil {
return nil, errors.Wrap(err, "marshal GCS credentials")
var cli *storagegcs.Client
var err error

if cfg.Credentials.PrivateKey != "" && cfg.Credentials.ClientEmail != "" {
creds, err := json.Marshal(ServiceAccountCredentials{
Type: "service_account",
PrivateKey: cfg.Credentials.PrivateKey,
ClientEmail: cfg.Credentials.ClientEmail,
AuthURI: "https://accounts.google.com/o/oauth2/auth",
TokenURI: "https://oauth2.googleapis.com/token",
UniverseDomain: "googleapis.com",
AuthProviderCertURL: "https://www.googleapis.com/oauth2/v1/certs",
ClientCertURL: fmt.Sprintf(
"https://www.googleapis.com/robot/v1/metadata/x509/%s",
cfg.Credentials.ClientEmail,
),
})
if err != nil {
return nil, errors.Wrap(err, "marshal GCS credentials")
}
cli, err = storagegcs.NewClient(ctx, option.WithCredentialsJSON(creds))
} else {
// Default to Workload Identity / ADC if no credentials are provided
cli, err = storagegcs.NewClient(ctx)
}

cli, err := storagegcs.NewClient(ctx, option.WithCredentialsJSON(creds))
if err != nil {
return nil, errors.Wrap(err, "new GCS client")
}
Expand Down