mirror of
https://github.com/minio/minio
synced 2024-07-20 09:57:03 +00:00
95bf4a57b6
Create new code paths for multiple subsystems in the code. This will make maintaing this easier later. Also introduce bugLogIf() for errors that should not happen in the first place.
92 lines
2.9 KiB
Go
92 lines
2.9 KiB
Go
// Copyright (c) 2015-2021 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package cmd
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import (
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"context"
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"errors"
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"fmt"
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etcd "go.etcd.io/etcd/client/v3"
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)
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var errEtcdUnreachable = errors.New("etcd is unreachable, please check your endpoints")
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func etcdErrToErr(err error, etcdEndpoints []string) error {
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if err == nil {
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return nil
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}
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switch err {
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case context.DeadlineExceeded:
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return fmt.Errorf("%w %s", errEtcdUnreachable, etcdEndpoints)
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default:
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return fmt.Errorf("unexpected error %w from etcd, please check your endpoints %s", err, etcdEndpoints)
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}
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}
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func saveKeyEtcdWithTTL(ctx context.Context, client *etcd.Client, key string, data []byte, ttl int64) error {
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timeoutCtx, cancel := context.WithTimeout(ctx, defaultContextTimeout)
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defer cancel()
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lease, err := client.Grant(timeoutCtx, ttl)
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if err != nil {
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return etcdErrToErr(err, client.Endpoints())
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}
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_, err = client.Put(timeoutCtx, key, string(data), etcd.WithLease(lease.ID))
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etcdLogIf(ctx, err)
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return etcdErrToErr(err, client.Endpoints())
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}
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func saveKeyEtcd(ctx context.Context, client *etcd.Client, key string, data []byte, opts ...options) error {
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timeoutCtx, cancel := context.WithTimeout(ctx, defaultContextTimeout)
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defer cancel()
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if len(opts) > 0 {
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return saveKeyEtcdWithTTL(ctx, client, key, data, opts[0].ttl)
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}
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_, err := client.Put(timeoutCtx, key, string(data))
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etcdLogIf(ctx, err)
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return etcdErrToErr(err, client.Endpoints())
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}
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func deleteKeyEtcd(ctx context.Context, client *etcd.Client, key string) error {
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timeoutCtx, cancel := context.WithTimeout(ctx, defaultContextTimeout)
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defer cancel()
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_, err := client.Delete(timeoutCtx, key)
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etcdLogIf(ctx, err)
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return etcdErrToErr(err, client.Endpoints())
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}
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func readKeyEtcd(ctx context.Context, client *etcd.Client, key string) ([]byte, error) {
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timeoutCtx, cancel := context.WithTimeout(ctx, defaultContextTimeout)
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defer cancel()
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resp, err := client.Get(timeoutCtx, key)
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if err != nil {
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etcdLogOnceIf(ctx, err, "etcd-retrieve-keys")
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return nil, etcdErrToErr(err, client.Endpoints())
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}
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if resp.Count == 0 {
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return nil, errConfigNotFound
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}
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for _, ev := range resp.Kvs {
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if string(ev.Key) == key {
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return ev.Value, nil
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}
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}
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return nil, errConfigNotFound
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}
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