Ignore duplication error when inserting config

This commit mitigates the situation when more then one adminserver is
deployed and there may be duplication error when they try to initialize
the configuration to DB.

Signed-off-by: Daniel Jiang <jiangd@vmware.com>

src/common/dao/base.go

@@ -126,6 +126,12 @@ func GetOrmer() orm.Ormer {
 	return globalOrm
 }
 
+// isDupRecErr checks if the error is due to a duplication of record, currently this
+// works only for pgSQL
+func isDupRecErr(e error) bool {
+	return strings.Contains(e.Error(), "duplicate key value violates unique constraint")
+}
+
 // ClearTable is the shortcut for test cases, it should be called only in test cases.
 func ClearTable(table string) error {
 	o := GetOrmer()

src/common/dao/config.go

@@ -18,6 +18,7 @@ import (
 	"github.com/goharbor/harbor/src/common"
 	"github.com/goharbor/harbor/src/common/models"
 	"github.com/goharbor/harbor/src/common/utils"
+	"github.com/goharbor/harbor/src/common/utils/log"
 )
 
 // AuthModeCanBeModified determines whether auth mode can be
@@ -60,7 +61,8 @@ func SaveConfigEntries(entries []models.ConfigEntry) error {
 		tempEntry.Key = entry.Key
 		tempEntry.Value = entry.Value
 		created, _, err := o.ReadOrCreate(&tempEntry, "k")
-		if err != nil {
+		if err != nil && !isDupRecErr(err) {
+			log.Errorf("Error create configuration entry: %v", err)
 			return err
 		}
 		if !created {

src/common/dao/dao_test.go

@@ -15,6 +15,7 @@
 package dao
 
 import (
+	"fmt"
 	"os"
 	"testing"
 	"time"
@@ -1486,5 +1487,9 @@ func TestSaveConfigEntries(t *testing.T) {
 	if findItem != 3 {
 		t.Fatalf("Should update 3 configuration but only update %d", findItem)
 	}
-
+}
+
+func TestIsDupRecError(t *testing.T) {
+	assert.True(t, isDupRecErr(fmt.Errorf("pq: duplicate key value violates unique constraint \"properties_k_key\"")))
+	assert.False(t, isDupRecErr(fmt.Errorf("other error")))
 }