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[#74] Add round tree retry

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Signed-off-by: Denis Kirillov <d.kirillov@yadro.com>
This commit is contained in:
Denis Kirillov 2023-04-04 17:47:16 +03:00
parent 18c7d669e0
commit 0c1e17dca4
2 changed files with 84 additions and 8 deletions
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27
internal/frostfs/services/tree_client_grpc.go
View file

@ -6,6 +6,7 @@ import (
"fmt"
"io"
"strings"
"sync/atomic"
"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
@ -69,9 +70,10 @@ func (n GetSubTreeResponseBodyWrapper) GetMeta() []tree.Meta {
}
type ServiceClientGRPC struct {
key *keys.PrivateKey
log *zap.Logger
clients []treeClient
key *keys.PrivateKey
log *zap.Logger
clients []treeClient
startIndex atomic.Int32
}
type treeClient struct {
@ -330,12 +332,15 @@ func (c *ServiceClientGRPC) RemoveNode(ctx context.Context, bktInfo *data.Bucket
type grpcFunc[Req any, Resp any] func(context.Context, Req, ...grpc.CallOption) (Resp, error)
func requestWithRetry[Req any, Resp any](ctx context.Context, req Req, c *ServiceClientGRPC, fn func(client treeClient) grpcFunc[Req, Resp]) (res Resp, err error) {
for _, client := range c.clients {
res, err = fn(client)(ctx, req)
start := int(c.startIndex.Load())
for i := start; i < start+len(c.clients); i++ {
index := i % len(c.clients)
res, err = fn(c.clients[index])(ctx, req)
if !shouldTryAgain(err) {
c.startIndex.Store(int32(index))
return res, err
}
c.log.Debug("tree request error", zap.String("address", client.address), zap.Error(err))
c.log.Debug("tree request error", zap.String("address", c.clients[index].address), zap.Error(err))
}
return res, err
@ -347,8 +352,14 @@ func shouldTryAgain(err error) bool {
}
code := status.Code(unwrapErr(err))
if code == codes.Unavailable || code == codes.Unimplemented ||
strings.Contains(err.Error(), "not found") {
if code == codes.Unavailable || code == codes.Unimplemented {
return true
}
errText := err.Error()
if strings.Contains(errText, "not found") ||
strings.Contains(errText, "shard is in read-only mode") ||
strings.Contains(errText, "shard is in degraded mode") {
return true
}

65
internal/frostfs/services/tree_client_grpc_test.go
View file

@ -1,11 +1,14 @@
package services
import (
"context"
"errors"
"testing"
"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
"github.com/stretchr/testify/require"
"go.uber.org/zap/zaptest"
"google.golang.org/grpc"
)
func TestHandleError(t *testing.T) {
@ -33,3 +36,65 @@ func TestHandleError(t *testing.T) {
})
}
}
func TestRetry(t *testing.T) {
ctx := context.Background()
cl := &ServiceClientGRPC{
log: zaptest.NewLogger(t),
clients: []treeClient{
{address: "node0"},
{address: "node1"},
{address: "node2"},
{address: "node3"},
},
}
fn := func(client treeClient) grpcFunc[[]string, string] {
return func(ctx context.Context, shouldFail []string, opts ...grpc.CallOption) (string, error) {
for _, item := range shouldFail {
if item == client.address {
return "", errors.New("not found")
}
}
return client.address, nil
}
}
t.Run("first ok", func(t *testing.T) {
resp, err := requestWithRetry(ctx, []string{}, cl, fn)
require.NoError(t, err)
require.Equal(t, "node0", resp)
require.Equal(t, 0, int(cl.startIndex.Load()))
cl.startIndex.Store(0)
})
t.Run("first failed", func(t *testing.T) {
resp, err := requestWithRetry(ctx, []string{"node0"}, cl, fn)
require.NoError(t, err)
require.Equal(t, "node1", resp)
require.Equal(t, 1, int(cl.startIndex.Load()))
cl.startIndex.Store(0)
})
t.Run("all failed", func(t *testing.T) {
resp, err := requestWithRetry(ctx, []string{"node0", "node1", "node2", "node3"}, cl, fn)
require.Error(t, err)
require.Equal(t, "", resp)
require.Equal(t, 0, int(cl.startIndex.Load()))
cl.startIndex.Store(0)
})
t.Run("round", func(t *testing.T) {
resp, err := requestWithRetry(ctx, []string{"node0", "node1"}, cl, fn)
require.NoError(t, err)
require.Equal(t, "node2", resp)
require.Equal(t, 2, int(cl.startIndex.Load()))
resp, err = requestWithRetry(ctx, []string{"node2", "node3"}, cl, fn)
require.NoError(t, err)
require.Equal(t, "node0", resp)
require.Equal(t, 0, int(cl.startIndex.Load()))
cl.startIndex.Store(0)
})
}