Chore: Handle wrapped errors (#29223)

* Chore: Handle wrapped errors

Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>

Co-authored-by: Emil Tullstedt <emil.tullstedt@grafana.com>

pkg/api/admin_provisioning.go

@@ -2,13 +2,14 @@ package api
 
 import (
 	"context"
+	"errors"
 
 	"github.com/grafana/grafana/pkg/models"
 )
 
 func (hs *HTTPServer) AdminProvisioningReloadDashboards(c *models.ReqContext) Response {
 	err := hs.ProvisioningService.ProvisionDashboards()
-	if err != nil && err != context.Canceled {
+	if err != nil && !errors.Is(err, context.Canceled) {
 		return Error(500, "", err)
 	}
 	return Success("Dashboards config reloaded")

pkg/api/admin_users.go

@@ -95,7 +95,7 @@ func AdminUpdateUserPermissions(c *models.ReqContext, form dtos.AdminUpdateUserP
 	}
 
 	if err := bus.Dispatch(&cmd); err != nil {
-		if err == models.ErrLastGrafanaAdmin {
+		if errors.Is(err, models.ErrLastGrafanaAdmin) {
 			return Error(400, models.ErrLastGrafanaAdmin.Error(), nil)
 		}
 
@@ -111,7 +111,7 @@ func AdminDeleteUser(c *models.ReqContext) Response {
 	cmd := models.DeleteUserCommand{UserId: userID}
 
 	if err := bus.Dispatch(&cmd); err != nil {
-		if err == models.ErrUserNotFound {
+		if errors.Is(err, models.ErrUserNotFound) {
 			return Error(404, models.ErrUserNotFound.Error(), nil)
 		}
 		return Error(500, "Failed to delete user", err)
@@ -126,13 +126,13 @@ func (hs *HTTPServer) AdminDisableUser(c *models.ReqContext) Response {
 
 	// External users shouldn't be disabled from API
 	authInfoQuery := &models.GetAuthInfoQuery{UserId: userID}
-	if err := bus.Dispatch(authInfoQuery); err != models.ErrUserNotFound {
+	if err := bus.Dispatch(authInfoQuery); !errors.Is(err, models.ErrUserNotFound) {
 		return Error(500, "Could not disable external user", nil)
 	}
 
 	disableCmd := models.DisableUserCommand{UserId: userID, IsDisabled: true}
 	if err := bus.Dispatch(&disableCmd); err != nil {
-		if err == models.ErrUserNotFound {
+		if errors.Is(err, models.ErrUserNotFound) {
 			return Error(404, models.ErrUserNotFound.Error(), nil)
 		}
 		return Error(500, "Failed to disable user", err)
@@ -152,13 +152,13 @@ func AdminEnableUser(c *models.ReqContext) Response {
 
 	// External users shouldn't be disabled from API
 	authInfoQuery := &models.GetAuthInfoQuery{UserId: userID}
-	if err := bus.Dispatch(authInfoQuery); err != models.ErrUserNotFound {
+	if err := bus.Dispatch(authInfoQuery); !errors.Is(err, models.ErrUserNotFound) {
 		return Error(500, "Could not enable external user", nil)
 	}
 
 	disableCmd := models.DisableUserCommand{UserId: userID, IsDisabled: false}
 	if err := bus.Dispatch(&disableCmd); err != nil {
-		if err == models.ErrUserNotFound {
+		if errors.Is(err, models.ErrUserNotFound) {
 			return Error(404, models.ErrUserNotFound.Error(), nil)
 		}
 		return Error(500, "Failed to enable user", err)

pkg/api/alerting.go

@@ -140,10 +140,11 @@ func AlertTest(c *models.ReqContext, dto dtos.AlertTestCommand) Response {
 	}
 
 	if err := bus.Dispatch(&backendCmd); err != nil {
-		if validationErr, ok := err.(alerting.ValidationError); ok {
+		var validationErr alerting.ValidationError
+		if errors.As(err, &validationErr) {
 			return Error(422, validationErr.Error(), nil)
 		}
-		if err == models.ErrDataSourceAccessDenied {
+		if errors.Is(err, models.ErrDataSourceAccessDenied) {
 			return Error(403, "Access denied to datasource", err)
 		}
 		return Error(500, "Failed to test rule", err)
@@ -292,7 +293,7 @@ func UpdateAlertNotification(c *models.ReqContext, cmd models.UpdateAlertNotific
 	}
 
 	if err := bus.Dispatch(&cmd); err != nil {
-		if err == models.ErrAlertNotificationNotFound {
+		if errors.Is(err, models.ErrAlertNotificationNotFound) {
 			return Error(404, err.Error(), err)
 		}
 		return Error(500, "Failed to update alert notification", err)
@@ -320,7 +321,7 @@ func UpdateAlertNotificationByUID(c *models.ReqContext, cmd models.UpdateAlertNo
 	}
 
 	if err := bus.Dispatch(&cmd); err != nil {
-		if err == models.ErrAlertNotificationNotFound {
+		if errors.Is(err, models.ErrAlertNotificationNotFound) {
 			return Error(404, err.Error(), nil)
 		}
 		return Error(500, "Failed to update alert notification", err)
@@ -393,7 +394,7 @@ func DeleteAlertNotification(c *models.ReqContext) Response {
 	}
 
 	if err := bus.Dispatch(&cmd); err != nil {
-		if err == models.ErrAlertNotificationNotFound {
+		if errors.Is(err, models.ErrAlertNotificationNotFound) {
 			return Error(404, err.Error(), nil)
 		}
 		return Error(500, "Failed to delete alert notification", err)
@@ -409,7 +410,7 @@ func DeleteAlertNotificationByUID(c *models.ReqContext) Response {
 	}
 
 	if err := bus.Dispatch(&cmd); err != nil {
-		if err == models.ErrAlertNotificationNotFound {
+		if errors.Is(err, models.ErrAlertNotificationNotFound) {
 			return Error(404, err.Error(), nil)
 		}
 		return Error(500, "Failed to delete alert notification", err)
@@ -433,7 +434,7 @@ func NotificationTest(c *models.ReqContext, dto dtos.NotificationTestCommand) Re
 	}
 
 	if err := bus.Dispatch(cmd); err != nil {
-		if err == models.ErrSmtpNotEnabled {
+		if errors.Is(err, models.ErrSmtpNotEnabled) {
 			return Error(412, err.Error(), err)
 		}
 		return Error(500, "Failed to send alert notifications", err)

pkg/api/apikey.go

@@ -1,6 +1,7 @@
 package api
 
 import (
+	"errors"
 	"time"
 
 	"github.com/grafana/grafana/pkg/api/dtos"
@@ -70,10 +71,10 @@ func (hs *HTTPServer) AddAPIKey(c *models.ReqContext, cmd models.AddApiKeyComman
 	cmd.Key = newKeyInfo.HashedKey
 
 	if err := bus.Dispatch(&cmd); err != nil {
-		if err == models.ErrInvalidApiKeyExpiration {
+		if errors.Is(err, models.ErrInvalidApiKeyExpiration) {
 			return Error(400, err.Error(), nil)
 		}
-		if err == models.ErrDuplicateApiKey {
+		if errors.Is(err, models.ErrDuplicateApiKey) {
 			return Error(409, err.Error(), nil)
 		}
 		return Error(500, "Failed to add API Key", err)

pkg/api/dashboard.go

@@ -498,7 +498,7 @@ func CalculateDashboardDiff(c *models.ReqContext, apiOptions dtos.CalculateDiffO
 
 	result, err := dashdiffs.CalculateDiff(&options)
 	if err != nil {
-		if err == models.ErrDashboardVersionNotFound {
+		if errors.Is(err, models.ErrDashboardVersionNotFound) {
 			return Error(404, "Dashboard version not found", err)
 		}
 		return Error(500, "Unable to compute diff", err)

pkg/api/dashboard_permission.go

@@ -1,6 +1,7 @@
 package api
 
 import (
+	"errors"
 	"time"
 
 	"github.com/grafana/grafana/pkg/api/dtos"
@@ -77,8 +78,7 @@ func UpdateDashboardPermissions(c *models.ReqContext, apiCmd dtos.UpdateDashboar
 
 	if okToUpdate, err := g.CheckPermissionBeforeUpdate(models.PERMISSION_ADMIN, cmd.Items); err != nil || !okToUpdate {
 		if err != nil {
-			if err == guardian.ErrGuardianPermissionExists ||
+			if errors.Is(err, guardian.ErrGuardianPermissionExists) || errors.Is(err, guardian.ErrGuardianOverride) {
-				err == guardian.ErrGuardianOverride {
 				return Error(400, err.Error(), err)
 			}
 
@@ -89,7 +89,8 @@ func UpdateDashboardPermissions(c *models.ReqContext, apiCmd dtos.UpdateDashboar
 	}
 
 	if err := bus.Dispatch(&cmd); err != nil {
-		if err == models.ErrDashboardAclInfoMissing || err == models.ErrDashboardPermissionDashboardEmpty {
+		if errors.Is(err, models.ErrDashboardAclInfoMissing) ||
+			errors.Is(err, models.ErrDashboardPermissionDashboardEmpty) {
 			return Error(409, err.Error(), err)
 		}
 		return Error(500, "Failed to create permission", err)

pkg/api/dataproxy.go

@@ -18,7 +18,7 @@ func (hs *HTTPServer) ProxyDataSourceRequest(c *models.ReqContext) {
 	dsID := c.ParamsInt64(":id")
 	ds, err := hs.DatasourceCache.GetDatasource(dsID, c.SignedInUser, c.SkipCache)
 	if err != nil {
-		if err == models.ErrDataSourceAccessDenied {
+		if errors.Is(err, models.ErrDataSourceAccessDenied) {
 			c.JsonApiErr(403, "Access denied to datasource", err)
 			return
 		}

pkg/api/datasources.go

@@ -2,6 +2,7 @@ package api
 
 import (
 	"encoding/json"
+	"errors"
 	"fmt"
 	"sort"
 
@@ -64,7 +65,7 @@ func GetDataSourceById(c *models.ReqContext) Response {
 	}
 
 	if err := bus.Dispatch(&query); err != nil {
-		if err == models.ErrDataSourceNotFound {
+		if errors.Is(err, models.ErrDataSourceNotFound) {
 			return Error(404, "Data source not found", nil)
 		}
 		return Error(500, "Failed to query datasources", err)
@@ -111,7 +112,7 @@ func DeleteDataSourceByName(c *models.ReqContext) Response {
 
 	getCmd := &models.GetDataSourceByNameQuery{Name: name, OrgId: c.OrgId}
 	if err := bus.Dispatch(getCmd); err != nil {
-		if err == models.ErrDataSourceNotFound {
+		if errors.Is(err, models.ErrDataSourceNotFound) {
 			return Error(404, "Data source not found", nil)
 		}
 		return Error(500, "Failed to delete datasource", err)
@@ -153,7 +154,7 @@ func AddDataSource(c *models.ReqContext, cmd models.AddDataSourceCommand) Respon
 	}
 
 	if err := bus.Dispatch(&cmd); err != nil {
-		if err == models.ErrDataSourceNameExists || err == models.ErrDataSourceUidExists {
+		if errors.Is(err, models.ErrDataSourceNameExists) || errors.Is(err, models.ErrDataSourceUidExists) {
 			return Error(409, err.Error(), err)
 		}
 
@@ -184,7 +185,7 @@ func UpdateDataSource(c *models.ReqContext, cmd models.UpdateDataSourceCommand)
 
 	err = bus.Dispatch(&cmd)
 	if err != nil {
-		if err == models.ErrDataSourceUpdatingOldVersion {
+		if errors.Is(err, models.ErrDataSourceUpdatingOldVersion) {
 			return Error(500, "Failed to update datasource. Reload new version and try again", err)
 		}
 		return Error(500, "Failed to update datasource", err)
@@ -196,7 +197,7 @@ func UpdateDataSource(c *models.ReqContext, cmd models.UpdateDataSourceCommand)
 	}
 
 	if err := bus.Dispatch(&query); err != nil {
-		if err == models.ErrDataSourceNotFound {
+		if errors.Is(err, models.ErrDataSourceNotFound) {
 			return Error(404, "Data source not found", nil)
 		}
 		return Error(500, "Failed to query datasources", err)
@@ -254,7 +255,7 @@ func GetDataSourceByName(c *models.ReqContext) Response {
 	query := models.GetDataSourceByNameQuery{Name: c.Params(":name"), OrgId: c.OrgId}
 
 	if err := bus.Dispatch(&query); err != nil {
-		if err == models.ErrDataSourceNotFound {
+		if errors.Is(err, models.ErrDataSourceNotFound) {
 			return Error(404, "Data source not found", nil)
 		}
 		return Error(500, "Failed to query datasources", err)
@@ -269,7 +270,7 @@ func GetDataSourceIdByName(c *models.ReqContext) Response {
 	query := models.GetDataSourceByNameQuery{Name: c.Params(":name"), OrgId: c.OrgId}
 
 	if err := bus.Dispatch(&query); err != nil {
-		if err == models.ErrDataSourceNotFound {
+		if errors.Is(err, models.ErrDataSourceNotFound) {
 			return Error(404, "Data source not found", nil)
 		}
 		return Error(500, "Failed to query datasources", err)
@@ -288,7 +289,7 @@ func (hs *HTTPServer) CallDatasourceResource(c *models.ReqContext) {
 	datasourceID := c.ParamsInt64(":id")
 	ds, err := hs.DatasourceCache.GetDatasource(datasourceID, c.SignedInUser, c.SkipCache)
 	if err != nil {
-		if err == models.ErrDataSourceAccessDenied {
+		if errors.Is(err, models.ErrDataSourceAccessDenied) {
 			c.JsonApiErr(403, "Access denied to datasource", err)
 			return
 		}
@@ -355,7 +356,7 @@ func (hs *HTTPServer) CheckDatasourceHealth(c *models.ReqContext) Response {
 
 	ds, err := hs.DatasourceCache.GetDatasource(datasourceID, c.SignedInUser, c.SkipCache)
 	if err != nil {
-		if err == models.ErrDataSourceAccessDenied {
+		if errors.Is(err, models.ErrDataSourceAccessDenied) {
 			return Error(403, "Access denied to datasource", err)
 		}
 		return Error(500, "Unable to load datasource metadata", err)

pkg/api/folder.go

@@ -134,24 +134,24 @@ func toFolderError(err error) Response {
 		return Error(dashboardErr.StatusCode, err.Error(), err)
 	}
 
-	if err == models.ErrFolderTitleEmpty ||
+	if errors.Is(err, models.ErrFolderTitleEmpty) ||
-		err == models.ErrFolderSameNameExists ||
+		errors.Is(err, models.ErrFolderSameNameExists) ||
-		err == models.ErrFolderWithSameUIDExists ||
+		errors.Is(err, models.ErrFolderWithSameUIDExists) ||
-		err == models.ErrDashboardTypeMismatch ||
+		errors.Is(err, models.ErrDashboardTypeMismatch) ||
-		err == models.ErrDashboardInvalidUid ||
+		errors.Is(err, models.ErrDashboardInvalidUid) ||
-		err == models.ErrDashboardUidTooLong {
+		errors.Is(err, models.ErrDashboardUidTooLong) {
 		return Error(400, err.Error(), nil)
 	}
 
-	if err == models.ErrFolderAccessDenied {
+	if errors.Is(err, models.ErrFolderAccessDenied) {
 		return Error(403, "Access denied", err)
 	}
 
-	if err == models.ErrFolderNotFound {
+	if errors.Is(err, models.ErrFolderNotFound) {
 		return JSON(404, util.DynMap{"status": "not-found", "message": models.ErrFolderNotFound.Error()})
 	}
 
-	if err == models.ErrFolderVersionMismatch {
+	if errors.Is(err, models.ErrFolderVersionMismatch) {
 		return JSON(412, util.DynMap{"status": "version-mismatch", "message": models.ErrFolderVersionMismatch.Error()})
 	}
 

pkg/api/folder_permission.go

@@ -1,6 +1,7 @@
 package api
 
 import (
+	"errors"
 	"time"
 
 	"github.com/grafana/grafana/pkg/api/dtos"
@@ -88,8 +89,8 @@ func UpdateFolderPermissions(c *models.ReqContext, apiCmd dtos.UpdateDashboardAc
 
 	if okToUpdate, err := g.CheckPermissionBeforeUpdate(models.PERMISSION_ADMIN, cmd.Items); err != nil || !okToUpdate {
 		if err != nil {
-			if err == guardian.ErrGuardianPermissionExists ||
+			if errors.Is(err, guardian.ErrGuardianPermissionExists) ||
-				err == guardian.ErrGuardianOverride {
+				errors.Is(err, guardian.ErrGuardianOverride) {
 				return Error(400, err.Error(), err)
 			}
 
@@ -100,14 +101,14 @@ func UpdateFolderPermissions(c *models.ReqContext, apiCmd dtos.UpdateDashboardAc
 	}
 
 	if err := bus.Dispatch(&cmd); err != nil {
-		if err == models.ErrDashboardAclInfoMissing {
+		if errors.Is(err, models.ErrDashboardAclInfoMissing) {
 			err = models.ErrFolderAclInfoMissing
 		}
-		if err == models.ErrDashboardPermissionDashboardEmpty {
+		if errors.Is(err, models.ErrDashboardPermissionDashboardEmpty) {
 			err = models.ErrFolderPermissionFolderEmpty
 		}
 
-		if err == models.ErrFolderAclInfoMissing || err == models.ErrFolderPermissionFolderEmpty {
+		if errors.Is(err, models.ErrFolderAclInfoMissing) || errors.Is(err, models.ErrFolderPermissionFolderEmpty) {
 			return Error(409, err.Error(), err)
 		}
 

pkg/api/frontendsettings.go

@@ -1,6 +1,7 @@
 package api
 
 import (
+	"errors"
 	"strconv"
 
 	"github.com/grafana/grafana/pkg/models"
@@ -31,7 +32,7 @@ func getFSDataSources(c *models.ReqContext, enabledPlugins *plugins.EnabledPlugi
 		}
 
 		if err := bus.Dispatch(&dsFilterQuery); err != nil {
-			if err != bus.ErrHandlerNotFound {
+			if !errors.Is(err, bus.ErrHandlerNotFound) {
 				return nil, err
 			}
 

pkg/api/http_server.go

@@ -3,6 +3,7 @@ package api
 import (
 	"context"
 	"crypto/tls"
+	"errors"
 	"fmt"
 	"net"
 	"net/http"
@@ -134,7 +135,7 @@ func (hs *HTTPServer) Run(ctx context.Context) error {
 	switch setting.Protocol {
 	case setting.HTTPScheme, setting.SocketScheme:
 		if err := hs.httpSrv.Serve(listener); err != nil {
-			if err == http.ErrServerClosed {
+			if errors.Is(err, http.ErrServerClosed) {
 				hs.log.Debug("server was shutdown gracefully")
 				return nil
 			}
@@ -142,7 +143,7 @@ func (hs *HTTPServer) Run(ctx context.Context) error {
 		}
 	case setting.HTTP2Scheme, setting.HTTPSScheme:
 		if err := hs.httpSrv.ServeTLS(listener, setting.CertFile, setting.KeyFile); err != nil {
-			if err == http.ErrServerClosed {
+			if errors.Is(err, http.ErrServerClosed) {
 				hs.log.Debug("server was shutdown gracefully")
 				return nil
 			}

pkg/api/ldap_debug.go

@@ -1,6 +1,7 @@
 package api
 
 import (
+	"errors"
 	"fmt"
 	"net/http"
 
@@ -167,7 +168,7 @@ func (hs *HTTPServer) PostSyncUserWithLDAP(c *models.ReqContext) Response {
 	query := models.GetUserByIdQuery{Id: userId}
 
 	if err := bus.Dispatch(&query); err != nil { // validate the userId exists
-		if err == models.ErrUserNotFound {
+		if errors.Is(err, models.ErrUserNotFound) {
 			return Error(404, models.ErrUserNotFound.Error(), nil)
 		}
 
@@ -177,7 +178,7 @@ func (hs *HTTPServer) PostSyncUserWithLDAP(c *models.ReqContext) Response {
 	authModuleQuery := &models.GetAuthInfoQuery{UserId: query.Result.Id, AuthModule: models.AuthModuleLDAP}
 
 	if err := bus.Dispatch(authModuleQuery); err != nil { // validate the userId comes from LDAP
-		if err == models.ErrUserNotFound {
+		if errors.Is(err, models.ErrUserNotFound) {
 			return Error(404, models.ErrUserNotFound.Error(), nil)
 		}
 
@@ -188,7 +189,7 @@ func (hs *HTTPServer) PostSyncUserWithLDAP(c *models.ReqContext) Response {
 	user, _, err := ldapServer.User(query.Result.Login)
 
 	if err != nil {
-		if err == multildap.ErrDidNotFindUser { // User was not in the LDAP server - we need to take action:
+		if errors.Is(err, multildap.ErrDidNotFindUser) { // User was not in the LDAP server - we need to take action:
 			if setting.AdminUser == query.Result.Login { // User is *the* Grafana Admin. We cannot disable it.
 				errMsg := fmt.Sprintf(`Refusing to sync grafana super admin "%s" - it would be disabled`, query.Result.Login)
 				logger.Error(errMsg)
@@ -197,7 +198,6 @@ func (hs *HTTPServer) PostSyncUserWithLDAP(c *models.ReqContext) Response {
 
 			// Since the user was not in the LDAP server. Let's disable it.
 			err := login.DisableExternalUser(query.Result.Login)
-
 			if err != nil {
 				return Error(http.StatusInternalServerError, "Failed to disable the user", err)
 			}
@@ -314,7 +314,7 @@ func (hs *HTTPServer) GetUserFromLDAP(c *models.ReqContext) Response {
 	cmd := &models.GetTeamsForLDAPGroupCommand{Groups: user.Groups}
 	err = bus.Dispatch(cmd)
 
-	if err != bus.ErrHandlerNotFound && err != nil {
+	if err != nil && !errors.Is(err, bus.ErrHandlerNotFound) {
 		return Error(http.StatusBadRequest, "Unable to find the teams for this user", err)
 	}
 

pkg/api/login.go

@@ -201,13 +201,14 @@ func (hs *HTTPServer) LoginPost(c *models.ReqContext, cmd dtos.LoginCommand) Res
 	authModule = authQuery.AuthModule
 	if err != nil {
 		response = Error(401, "Invalid username or password", err)
-		if err == login.ErrInvalidCredentials || err == login.ErrTooManyLoginAttempts || err == models.ErrUserNotFound {
+		if errors.Is(err, login.ErrInvalidCredentials) || errors.Is(err, login.ErrTooManyLoginAttempts) || errors.Is(err,
+			models.ErrUserNotFound) {
 			return response
 		}
 
 		// Do not expose disabled status,
 		// just show incorrect user credentials error (see #17947)
-		if err == login.ErrUserDisabled {
+		if errors.Is(err, login.ErrUserDisabled) {
 			hs.log.Warn("User is disabled", "user", cmd.User)
 			return response
 		}
@@ -263,7 +264,8 @@ func (hs *HTTPServer) Logout(c *models.ReqContext) {
 		return
 	}
 
-	if err := hs.AuthTokenService.RevokeToken(c.Req.Context(), c.UserToken); err != nil && err != models.ErrUserTokenNotFound {
+	err := hs.AuthTokenService.RevokeToken(c.Req.Context(), c.UserToken)
+	if err != nil && !errors.Is(err, models.ErrUserTokenNotFound) {
 		hs.log.Error("failed to revoke auth token", "error", err)
 	}
 

pkg/api/login_oauth.go

@@ -146,7 +146,8 @@ func (hs *HTTPServer) OAuthLogin(ctx *models.ReqContext) {
 	// get user info
 	userInfo, err := connect.UserInfo(client, token)
 	if err != nil {
-		if sErr, ok := err.(*social.Error); ok {
+		var sErr *social.Error
+		if errors.As(err, &sErr) {
 			hs.handleOAuthLoginErrorWithRedirect(ctx, loginInfo, sErr)
 		} else {
 			hs.handleOAuthLoginError(ctx, loginInfo, LoginError{

pkg/api/metrics.go

@@ -114,7 +114,7 @@ func (hs *HTTPServer) QueryMetrics(c *models.ReqContext, reqDto dtos.MetricReque
 
 	ds, err := hs.DatasourceCache.GetDatasource(datasourceId, c.SignedInUser, c.SkipCache)
 	if err != nil {
-		if err == models.ErrDataSourceAccessDenied {
+		if errors.Is(err, models.ErrDataSourceAccessDenied) {
 			return Error(403, "Access denied to datasource", err)
 		}
 		return Error(500, "Unable to load datasource meta data", err)

pkg/api/org.go

@@ -1,6 +1,8 @@
 package api
 
 import (
+	"errors"
+
 	"github.com/grafana/grafana/pkg/api/dtos"
 	"github.com/grafana/grafana/pkg/bus"
 	"github.com/grafana/grafana/pkg/infra/metrics"
@@ -23,7 +25,7 @@ func GetOrgByID(c *models.ReqContext) Response {
 func GetOrgByName(c *models.ReqContext) Response {
 	query := models.GetOrgByNameQuery{Name: c.Params(":name")}
 	if err := bus.Dispatch(&query); err != nil {
-		if err == models.ErrOrgNotFound {
+		if errors.Is(err, models.ErrOrgNotFound) {
 			return Error(404, "Organization not found", err)
 		}
 
@@ -50,7 +52,7 @@ func getOrgHelper(orgID int64) Response {
 	query := models.GetOrgByIdQuery{Id: orgID}
 
 	if err := bus.Dispatch(&query); err != nil {
-		if err == models.ErrOrgNotFound {
+		if errors.Is(err, models.ErrOrgNotFound) {
 			return Error(404, "Organization not found", err)
 		}
 
@@ -82,7 +84,7 @@ func CreateOrg(c *models.ReqContext, cmd models.CreateOrgCommand) Response {
 
 	cmd.UserId = c.UserId
 	if err := bus.Dispatch(&cmd); err != nil {
-		if err == models.ErrOrgNameTaken {
+		if errors.Is(err, models.ErrOrgNameTaken) {
 			return Error(409, "Organization name taken", err)
 		}
 		return Error(500, "Failed to create organization", err)
@@ -109,7 +111,7 @@ func UpdateOrg(c *models.ReqContext, form dtos.UpdateOrgForm) Response {
 func updateOrgHelper(form dtos.UpdateOrgForm, orgID int64) Response {
 	cmd := models.UpdateOrgCommand{Name: form.Name, OrgId: orgID}
 	if err := bus.Dispatch(&cmd); err != nil {
-		if err == models.ErrOrgNameTaken {
+		if errors.Is(err, models.ErrOrgNameTaken) {
 			return Error(400, "Organization name taken", err)
 		}
 		return Error(500, "Failed to update organization", err)
@@ -151,7 +153,7 @@ func updateOrgAddressHelper(form dtos.UpdateOrgAddressForm, orgID int64) Respons
 // GET /api/orgs/:orgId
 func DeleteOrgByID(c *models.ReqContext) Response {
 	if err := bus.Dispatch(&models.DeleteOrgCommand{Id: c.ParamsInt64(":orgId")}); err != nil {
-		if err == models.ErrOrgNotFound {
+		if errors.Is(err, models.ErrOrgNotFound) {
 			return Error(404, "Failed to delete organization. ID not found", nil)
 		}
 		return Error(500, "Failed to update organization", err)

pkg/api/org_invite.go

@@ -35,7 +35,7 @@ func AddOrgInvite(c *models.ReqContext, inviteDto dtos.AddInviteForm) Response {
 	// first try get existing user
 	userQuery := models.GetUserByLoginQuery{LoginOrEmail: inviteDto.LoginOrEmail}
 	if err := bus.Dispatch(&userQuery); err != nil {
-		if err != models.ErrUserNotFound {
+		if !errors.Is(err, models.ErrUserNotFound) {
 			return Error(500, "Failed to query db for existing user check", err)
 		}
 	} else {
@@ -79,7 +79,7 @@ func AddOrgInvite(c *models.ReqContext, inviteDto dtos.AddInviteForm) Response {
 		}
 
 		if err := bus.Dispatch(&emailCmd); err != nil {
-			if err == models.ErrSmtpNotEnabled {
+			if errors.Is(err, models.ErrSmtpNotEnabled) {
 				return Error(412, err.Error(), err)
 			}
 
@@ -101,7 +101,7 @@ func inviteExistingUserToOrg(c *models.ReqContext, user *models.User, inviteDto
 	// user exists, add org role
 	createOrgUserCmd := models.AddOrgUserCommand{OrgId: c.OrgId, UserId: user.Id, Role: inviteDto.Role}
 	if err := bus.Dispatch(&createOrgUserCmd); err != nil {
-		if err == models.ErrOrgUserAlreadyAdded {
+		if errors.Is(err, models.ErrOrgUserAlreadyAdded) {
 			return Error(412, fmt.Sprintf("User %s is already added to organization", inviteDto.LoginOrEmail), err)
 		}
 		return Error(500, "Error while trying to create org user", err)
@@ -143,7 +143,7 @@ func RevokeInvite(c *models.ReqContext) Response {
 func GetInviteInfoByCode(c *models.ReqContext) Response {
 	query := models.GetTempUserByCodeQuery{Code: c.Params(":code")}
 	if err := bus.Dispatch(&query); err != nil {
-		if err == models.ErrTempUserNotFound {
+		if errors.Is(err, models.ErrTempUserNotFound) {
 			return Error(404, "Invite not found", nil)
 		}
 		return Error(500, "Failed to get invite", err)
@@ -166,7 +166,7 @@ func (hs *HTTPServer) CompleteInvite(c *models.ReqContext, completeInvite dtos.C
 	query := models.GetTempUserByCodeQuery{Code: completeInvite.InviteCode}
 
 	if err := bus.Dispatch(&query); err != nil {
-		if err == models.ErrTempUserNotFound {
+		if errors.Is(err, models.ErrTempUserNotFound) {
 			return Error(404, "Invite not found", nil)
 		}
 		return Error(500, "Failed to get invite", err)
@@ -234,7 +234,7 @@ func applyUserInvite(user *models.User, invite *models.TempUserDTO, setActive bo
 	// add to org
 	addOrgUserCmd := models.AddOrgUserCommand{OrgId: invite.OrgId, UserId: user.Id, Role: invite.Role}
 	if err := bus.Dispatch(&addOrgUserCmd); err != nil {
-		if err != models.ErrOrgUserAlreadyAdded {
+		if !errors.Is(err, models.ErrOrgUserAlreadyAdded) {
 			return false, Error(500, "Error while trying to create org user", err)
 		}
 	}

pkg/api/org_users.go

@@ -1,6 +1,8 @@
 package api
 
 import (
+	"errors"
+
 	"github.com/grafana/grafana/pkg/api/dtos"
 	"github.com/grafana/grafana/pkg/bus"
 	"github.com/grafana/grafana/pkg/models"
@@ -35,7 +37,7 @@ func addOrgUserHelper(cmd models.AddOrgUserCommand) Response {
 	cmd.UserId = userToAdd.Id
 
 	if err := bus.Dispatch(&cmd); err != nil {
-		if err == models.ErrOrgUserAlreadyAdded {
+		if errors.Is(err, models.ErrOrgUserAlreadyAdded) {
 			return JSON(409, util.DynMap{
 				"message": "User is already member of this organization",
 				"userId":  cmd.UserId,
@@ -159,7 +161,7 @@ func updateOrgUserHelper(cmd models.UpdateOrgUserCommand) Response {
 	}
 
 	if err := bus.Dispatch(&cmd); err != nil {
-		if err == models.ErrLastOrgAdmin {
+		if errors.Is(err, models.ErrLastOrgAdmin) {
 			return Error(400, "Cannot change role so that there is no organization admin left", nil)
 		}
 		return Error(500, "Failed update org user", err)
@@ -187,7 +189,7 @@ func RemoveOrgUser(c *models.ReqContext) Response {
 
 func removeOrgUserHelper(cmd *models.RemoveOrgUserCommand) Response {
 	if err := bus.Dispatch(cmd); err != nil {
-		if err == models.ErrLastOrgAdmin {
+		if errors.Is(err, models.ErrLastOrgAdmin) {
 			return Error(400, "Cannot remove last organization admin", nil)
 		}
 		return Error(500, "Failed to remove user from organization", err)

pkg/api/password.go

@@ -1,6 +1,8 @@
 package api
 
 import (
+	"errors"
+
 	"github.com/grafana/grafana/pkg/api/dtos"
 	"github.com/grafana/grafana/pkg/bus"
 	"github.com/grafana/grafana/pkg/models"
@@ -35,7 +37,7 @@ func ResetPassword(c *models.ReqContext, form dtos.ResetUserPasswordForm) Respon
 	query := models.ValidateResetPasswordCodeQuery{Code: form.Code}
 
 	if err := bus.Dispatch(&query); err != nil {
-		if err == models.ErrInvalidEmailCode {
+		if errors.Is(err, models.ErrInvalidEmailCode) {
 			return Error(400, "Invalid or expired reset password code", nil)
 		}
 		return Error(500, "Unknown error validating email code", err)

pkg/api/plugins.go

@@ -37,7 +37,7 @@ func (hs *HTTPServer) getPluginContext(pluginID string, user *models.SignedInUse
 	if err != nil {
 		// models.ErrPluginSettingNotFound is expected if there's no row found for plugin setting in database (if non-app plugin).
 		// If it's not this expected error something is wrong with cache or database and we return the error to the client.
-		if err != models.ErrPluginSettingNotFound {
+		if !errors.Is(err, models.ErrPluginSettingNotFound) {
 			return pc, errutil.Wrap("Failed to get plugin settings", err)
 		}
 	} else {
@@ -166,7 +166,7 @@ func GetPluginSettingByID(c *models.ReqContext) Response {
 
 	query := models.GetPluginSettingByIdQuery{PluginId: pluginID, OrgId: c.OrgId}
 	if err := bus.Dispatch(&query); err != nil {
-		if err != models.ErrPluginSettingNotFound {
+		if !errors.Is(err, models.ErrPluginSettingNotFound) {
 			return Error(500, "Failed to get login settings", nil)
 		}
 	} else {
@@ -200,8 +200,9 @@ func GetPluginDashboards(c *models.ReqContext) Response {
 
 	list, err := plugins.GetPluginDashboards(c.OrgId, pluginID)
 	if err != nil {
-		if notfound, ok := err.(plugins.PluginNotFoundError); ok {
+		var notFound plugins.PluginNotFoundError
-			return Error(404, notfound.Error(), nil)
+		if errors.As(err, &notFound) {
+			return Error(404, notFound.Error(), nil)
 		}
 
 		return Error(500, "Failed to get plugin dashboards", err)
@@ -216,8 +217,9 @@ func GetPluginMarkdown(c *models.ReqContext) Response {
 
 	content, err := plugins.GetPluginMarkdown(pluginID, name)
 	if err != nil {
-		if notfound, ok := err.(plugins.PluginNotFoundError); ok {
+		var notFound plugins.PluginNotFoundError
-			return Error(404, notfound.Error(), nil)
+		if errors.As(err, &notFound) {
+			return Error(404, notFound.Error(), nil)
 		}
 
 		return Error(500, "Could not get markdown file", err)
@@ -291,7 +293,7 @@ func (hs *HTTPServer) CheckHealth(c *models.ReqContext) Response {
 
 	pCtx, err := hs.getPluginContext(pluginID, c.SignedInUser)
 	if err != nil {
-		if err == ErrPluginNotFound {
+		if errors.Is(err, ErrPluginNotFound) {
 			return Error(404, "Plugin not found", nil)
 		}
 
@@ -334,7 +336,7 @@ func (hs *HTTPServer) CallResource(c *models.ReqContext) {
 
 	pCtx, err := hs.getPluginContext(pluginID, c.SignedInUser)
 	if err != nil {
-		if err == ErrPluginNotFound {
+		if errors.Is(err, ErrPluginNotFound) {
 			c.JsonApiErr(404, "Plugin not found", nil)
 			return
 		}

pkg/api/render.go

@@ -1,6 +1,7 @@
 package api
 
 import (
+	"errors"
 	"fmt"
 	"net/http"
 	"runtime"
@@ -66,22 +67,20 @@ func (hs *HTTPServer) RenderToPng(c *models.ReqContext) {
 		DeviceScaleFactor: scale,
 		Headers:           headers,
 	})
-
-	if err != nil && err == rendering.ErrTimeout {
-		c.Handle(500, err.Error(), err)
-		return
-	}
-
-	if err != nil && err == rendering.ErrPhantomJSNotInstalled {
-		if strings.HasPrefix(runtime.GOARCH, "arm") {
-			c.Handle(500, "Rendering failed - PhantomJS isn't included in arm build per default", err)
-		} else {
-			c.Handle(500, "Rendering failed - PhantomJS isn't installed correctly", err)
-		}
-		return
-	}
-
 	if err != nil {
+		if errors.Is(err, rendering.ErrTimeout) {
+			c.Handle(500, err.Error(), err)
+			return
+		}
+		if errors.Is(err, rendering.ErrPhantomJSNotInstalled) {
+			if strings.HasPrefix(runtime.GOARCH, "arm") {
+				c.Handle(500, "Rendering failed - PhantomJS isn't included in arm build per default", err)
+			} else {
+				c.Handle(500, "Rendering failed - PhantomJS isn't installed correctly", err)
+			}
+			return
+		}
+
 		c.Handle(500, "Rendering failed.", err)
 		return
 	}

pkg/api/signup.go

@@ -131,7 +131,7 @@ func verifyUserSignUpEmail(email string, code string) (bool, Response) {
 	query := models.GetTempUserByCodeQuery{Code: code}
 
 	if err := bus.Dispatch(&query); err != nil {
-		if err == models.ErrTempUserNotFound {
+		if errors.Is(err, models.ErrTempUserNotFound) {
 			return false, Error(404, "Invalid email verification code", nil)
 		}
 		return false, Error(500, "Failed to read temp user", err)

pkg/api/team.go

@@ -1,6 +1,8 @@
 package api
 
 import (
+	"errors"
+
 	"github.com/grafana/grafana/pkg/api/dtos"
 	"github.com/grafana/grafana/pkg/bus"
 	"github.com/grafana/grafana/pkg/models"
@@ -17,7 +19,7 @@ func (hs *HTTPServer) CreateTeam(c *models.ReqContext, cmd models.CreateTeamComm
 	}
 
 	if err := hs.Bus.Dispatch(&cmd); err != nil {
-		if err == models.ErrTeamNameTaken {
+		if errors.Is(err, models.ErrTeamNameTaken) {
 			return Error(409, "Team name taken", err)
 		}
 		return Error(500, "Failed to create Team", err)
@@ -59,7 +61,7 @@ func (hs *HTTPServer) UpdateTeam(c *models.ReqContext, cmd models.UpdateTeamComm
 	}
 
 	if err := hs.Bus.Dispatch(&cmd); err != nil {
-		if err == models.ErrTeamNameTaken {
+		if errors.Is(err, models.ErrTeamNameTaken) {
 			return Error(400, "Team name taken", err)
 		}
 		return Error(500, "Failed to update Team", err)
@@ -79,7 +81,7 @@ func (hs *HTTPServer) DeleteTeamByID(c *models.ReqContext) Response {
 	}
 
 	if err := hs.Bus.Dispatch(&models.DeleteTeamCommand{OrgId: orgId, Id: teamId}); err != nil {
-		if err == models.ErrTeamNotFound {
+		if errors.Is(err, models.ErrTeamNotFound) {
 			return Error(404, "Failed to delete Team. ID not found", nil)
 		}
 		return Error(500, "Failed to delete Team", err)
@@ -131,7 +133,7 @@ func GetTeamByID(c *models.ReqContext) Response {
 	query := models.GetTeamByIdQuery{OrgId: c.OrgId, Id: c.ParamsInt64(":teamId")}
 
 	if err := bus.Dispatch(&query); err != nil {
-		if err == models.ErrTeamNotFound {
+		if errors.Is(err, models.ErrTeamNotFound) {
 			return Error(404, "Team not found", err)
 		}
 

pkg/api/team_members.go

@@ -1,6 +1,8 @@
 package api
 
 import (
+	"errors"
+
 	"github.com/grafana/grafana/pkg/api/dtos"
 	"github.com/grafana/grafana/pkg/bus"
 	"github.com/grafana/grafana/pkg/models"
@@ -39,11 +41,11 @@ func (hs *HTTPServer) AddTeamMember(c *models.ReqContext, cmd models.AddTeamMemb
 	}
 
 	if err := hs.Bus.Dispatch(&cmd); err != nil {
-		if err == models.ErrTeamNotFound {
+		if errors.Is(err, models.ErrTeamNotFound) {
 			return Error(404, "Team not found", nil)
 		}
 
-		if err == models.ErrTeamMemberAlreadyAdded {
+		if errors.Is(err, models.ErrTeamMemberAlreadyAdded) {
 			return Error(400, "User is already added to this team", nil)
 		}
 
@@ -73,7 +75,7 @@ func (hs *HTTPServer) UpdateTeamMember(c *models.ReqContext, cmd models.UpdateTe
 	cmd.OrgId = orgId
 
 	if err := hs.Bus.Dispatch(&cmd); err != nil {
-		if err == models.ErrTeamMemberNotFound {
+		if errors.Is(err, models.ErrTeamMemberNotFound) {
 			return Error(404, "Team member not found.", nil)
 		}
 		return Error(500, "Failed to update team member.", err)
@@ -97,11 +99,11 @@ func (hs *HTTPServer) RemoveTeamMember(c *models.ReqContext) Response {
 	}
 
 	if err := hs.Bus.Dispatch(&models.RemoveTeamMemberCommand{OrgId: orgId, TeamId: teamId, UserId: userId, ProtectLastAdmin: protectLastAdmin}); err != nil {
-		if err == models.ErrTeamNotFound {
+		if errors.Is(err, models.ErrTeamNotFound) {
 			return Error(404, "Team not found", nil)
 		}
 
-		if err == models.ErrTeamMemberNotFound {
+		if errors.Is(err, models.ErrTeamMemberNotFound) {
 			return Error(404, "Team member not found", nil)
 		}
 

pkg/api/user.go

@@ -1,6 +1,8 @@
 package api
 
 import (
+	"errors"
+
 	"github.com/grafana/grafana/pkg/api/dtos"
 	"github.com/grafana/grafana/pkg/bus"
 	"github.com/grafana/grafana/pkg/models"
@@ -22,7 +24,7 @@ func getUserUserProfile(userID int64) Response {
 	query := models.GetUserProfileQuery{UserId: userID}
 
 	if err := bus.Dispatch(&query); err != nil {
-		if err == models.ErrUserNotFound {
+		if errors.Is(err, models.ErrUserNotFound) {
 			return Error(404, models.ErrUserNotFound.Error(), nil)
 		}
 		return Error(500, "Failed to get user", err)
@@ -45,7 +47,7 @@ func getUserUserProfile(userID int64) Response {
 func GetUserByLoginOrEmail(c *models.ReqContext) Response {
 	query := models.GetUserByLoginQuery{LoginOrEmail: c.Query("loginOrEmail")}
 	if err := bus.Dispatch(&query); err != nil {
-		if err == models.ErrUserNotFound {
+		if errors.Is(err, models.ErrUserNotFound) {
 			return Error(404, models.ErrUserNotFound.Error(), nil)
 		}
 		return Error(500, "Failed to get user", err)

pkg/api/user_token.go

@@ -2,6 +2,7 @@ package api
 
 import (
 	"context"
+	"errors"
 	"time"
 
 	"github.com/grafana/grafana/pkg/api/dtos"
@@ -25,7 +26,7 @@ func (hs *HTTPServer) logoutUserFromAllDevicesInternal(ctx context.Context, user
 	userQuery := models.GetUserByIdQuery{Id: userID}
 
 	if err := bus.Dispatch(&userQuery); err != nil {
-		if err == models.ErrUserNotFound {
+		if errors.Is(err, models.ErrUserNotFound) {
 			return Error(404, "User not found", err)
 		}
 		return Error(500, "Could not read user from database", err)
@@ -45,7 +46,7 @@ func (hs *HTTPServer) getUserAuthTokensInternal(c *models.ReqContext, userID int
 	userQuery := models.GetUserByIdQuery{Id: userID}
 
 	if err := bus.Dispatch(&userQuery); err != nil {
-		if err == models.ErrUserNotFound {
+		if errors.Is(err, models.ErrUserNotFound) {
 			return Error(404, "User not found", err)
 		}
 		return Error(500, "Failed to get user", err)
@@ -112,7 +113,7 @@ func (hs *HTTPServer) revokeUserAuthTokenInternal(c *models.ReqContext, userID i
 	userQuery := models.GetUserByIdQuery{Id: userID}
 
 	if err := bus.Dispatch(&userQuery); err != nil {
-		if err == models.ErrUserNotFound {
+		if errors.Is(err, models.ErrUserNotFound) {
 			return Error(404, "User not found", err)
 		}
 		return Error(500, "Failed to get user", err)
@@ -120,7 +121,7 @@ func (hs *HTTPServer) revokeUserAuthTokenInternal(c *models.ReqContext, userID i
 
 	token, err := hs.AuthTokenService.GetUserToken(c.Req.Context(), userID, cmd.AuthTokenId)
 	if err != nil {
-		if err == models.ErrUserTokenNotFound {
+		if errors.Is(err, models.ErrUserTokenNotFound) {
 			return Error(404, "User auth token not found", err)
 		}
 		return Error(500, "Failed to get user auth token", err)
@@ -132,7 +133,7 @@ func (hs *HTTPServer) revokeUserAuthTokenInternal(c *models.ReqContext, userID i
 
 	err = hs.AuthTokenService.RevokeToken(c.Req.Context(), token)
 	if err != nil {
-		if err == models.ErrUserTokenNotFound {
+		if errors.Is(err, models.ErrUserTokenNotFound) {
 			return Error(404, "User auth token not found", err)
 		}
 		return Error(500, "Failed to revoke user auth token", err)

pkg/infra/log/file.go

@@ -134,12 +134,11 @@ func (w *FileLogWriter) lineCounter() (int, error) {
 		c, err := r.Read(buf)
 		count += bytes.Count(buf[:c], []byte{'\n'})
 		switch {
-		case err == io.EOF:
+		case errors.Is(err, io.EOF):
 			if err := r.Close(); err != nil {
 				return count, err
 			}
 			return count, nil
-
 		case err != nil:
 			return count, err
 		}

pkg/login/auth.go

@@ -39,7 +39,8 @@ func AuthenticateUser(query *models.LoginUserQuery) error {
 	}
 
 	err := loginUsingGrafanaDB(query)
-	if err == nil || (err != models.ErrUserNotFound && err != ErrInvalidCredentials && err != ErrUserDisabled) {
+	if err == nil || (!errors.Is(err, models.ErrUserNotFound) && !errors.Is(err, ErrInvalidCredentials) &&
+		!errors.Is(err, ErrUserDisabled)) {
 		query.AuthModule = "grafana"
 		return err
 	}
@@ -47,16 +48,16 @@ func AuthenticateUser(query *models.LoginUserQuery) error {
 	ldapEnabled, ldapErr := loginUsingLDAP(query)
 	if ldapEnabled {
 		query.AuthModule = models.AuthModuleLDAP
-		if ldapErr == nil || ldapErr != ldap.ErrInvalidCredentials {
+		if ldapErr == nil || !errors.Is(ldapErr, ldap.ErrInvalidCredentials) {
 			return ldapErr
 		}
 
-		if err != ErrUserDisabled || ldapErr != ldap.ErrInvalidCredentials {
+		if !errors.Is(err, ErrUserDisabled) || !errors.Is(ldapErr, ldap.ErrInvalidCredentials) {
 			err = ldapErr
 		}
 	}
 
-	if err == ErrInvalidCredentials || err == ldap.ErrInvalidCredentials {
+	if errors.Is(err, ErrInvalidCredentials) || errors.Is(err, ldap.ErrInvalidCredentials) {
 		if err := saveInvalidLoginAttempt(query); err != nil {
 			loginLogger.Error("Failed to save invalid login attempt", "err", err)
 		}

pkg/login/ldap_login.go

@@ -1,6 +1,8 @@
 package login
 
 import (
+	"errors"
+
 	"github.com/grafana/grafana/pkg/bus"
 	"github.com/grafana/grafana/pkg/infra/log"
 	"github.com/grafana/grafana/pkg/models"
@@ -38,7 +40,7 @@ var loginUsingLDAP = func(query *models.LoginUserQuery) (bool, error) {
 
 	externalUser, err := newLDAP(config.Servers).Login(query)
 	if err != nil {
-		if err == ldap.ErrCouldNotFindUser {
+		if errors.Is(err, ldap.ErrCouldNotFindUser) {
 			// Ignore the error since user might not be present anyway
 			if err := DisableExternalUser(query.Username); err != nil {
 				ldapLogger.Debug("Failed to disable external user", "err", err)

pkg/plugins/backendplugin/grpcplugin/client_v2.go

@@ -2,6 +2,7 @@ package grpcplugin
 
 import (
 	"context"
+	"errors"
 	"io"
 
 	"github.com/grafana/grafana-plugin-sdk-go/backend"
@@ -143,11 +144,11 @@ func (c *clientV2) CallResource(ctx context.Context, req *backend.CallResourceRe
 				return backendplugin.ErrMethodNotImplemented
 			}
 
-			if err == io.EOF {
+			if errors.Is(err, io.EOF) {
 				return nil
 			}
 
-			return errutil.Wrap("Failed to receive call resource response", err)
+			return errutil.Wrap("failed to receive call resource response", err)
 		}
 
 		if err := sender.Send(backend.FromProto().CallResourceResponse(protoResp)); err != nil {

pkg/plugins/backendplugin/manager.go

@@ -313,7 +313,7 @@ func flushStream(plugin Plugin, stream CallResourceClientResponseStream, w http.
 
 	for {
 		resp, err := stream.Recv()
-		if err == io.EOF {
+		if errors.Is(err, io.EOF) {
 			if processedStreams == 0 {
 				return errors.New("received empty resource response")
 			}

pkg/plugins/models.go

@@ -49,6 +49,7 @@ func (e duplicatePluginError) Error() string {
 }
 
 func (e duplicatePluginError) Is(err error) bool {
+	// nolint:errorlint
 	_, ok := err.(duplicatePluginError)
 	return ok
 }

pkg/server/server.go

@@ -187,7 +187,7 @@ func (s *Server) Run() (err error) {
 				// Mark that we are in shutdown mode
 				// So no more services are started
 				s.shutdownInProgress = true
-				if err != context.Canceled {
+				if !errors.Is(err, context.Canceled) {
 					// Server has crashed.
 					s.log.Error("Stopped "+descriptor.Name, "reason", err)
 				} else {
@@ -234,7 +234,7 @@ func (s *Server) Shutdown(reason string) {
 func (s *Server) ExitCode(reason error) int {
 	code := 1
 
-	if reason == context.Canceled && s.shutdownReason != "" {
+	if errors.Is(reason, context.Canceled) && s.shutdownReason != "" {
 		reason = fmt.Errorf(s.shutdownReason)
 		code = 0
 	}