mirror of
https://github.com/minio/minio.git
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2aa18cafc6
With CoreDNS now supporting etcdv3 as the DNS backend, we can update our federation target to etcdv3. Users will now be able to use etcdv3 server as the federation backbone. Minio will update bucket data to etcdv3 and CoreDNS can pick that data up and serve it as bucket style DNS path.
101 lines
3.3 KiB
Go
101 lines
3.3 KiB
Go
// Copyright (c) 2016 Uber Technologies, Inc.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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package zap
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import (
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"io"
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"io/ioutil"
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"os"
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"go.uber.org/zap/zapcore"
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"go.uber.org/multierr"
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)
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// Open is a high-level wrapper that takes a variadic number of paths, opens or
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// creates each of the specified files, and combines them into a locked
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// WriteSyncer. It also returns any error encountered and a function to close
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// any opened files.
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//
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// Passing no paths returns a no-op WriteSyncer. The special paths "stdout" and
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// "stderr" are interpreted as os.Stdout and os.Stderr, respectively.
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func Open(paths ...string) (zapcore.WriteSyncer, func(), error) {
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writers, close, err := open(paths)
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if err != nil {
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return nil, nil, err
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}
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writer := CombineWriteSyncers(writers...)
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return writer, close, nil
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}
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func open(paths []string) ([]zapcore.WriteSyncer, func(), error) {
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var openErr error
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writers := make([]zapcore.WriteSyncer, 0, len(paths))
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closers := make([]io.Closer, 0, len(paths))
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close := func() {
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for _, c := range closers {
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c.Close()
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}
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}
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for _, path := range paths {
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sink, err := newSink(path)
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if err == nil {
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// Using a registered sink constructor.
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writers = append(writers, sink)
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closers = append(closers, sink)
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continue
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}
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if _, ok := err.(*errSinkNotFound); ok {
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// No named sink constructor, use key as path to log file.
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f, e := os.OpenFile(path, os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0644)
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openErr = multierr.Append(openErr, e)
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if e == nil {
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writers = append(writers, f)
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closers = append(closers, f)
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}
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continue
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}
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// Sink constructor failed.
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openErr = multierr.Append(openErr, err)
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}
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if openErr != nil {
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close()
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return writers, nil, openErr
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}
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return writers, close, nil
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}
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// CombineWriteSyncers is a utility that combines multiple WriteSyncers into a
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// single, locked WriteSyncer. If no inputs are supplied, it returns a no-op
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// WriteSyncer.
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//
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// It's provided purely as a convenience; the result is no different from
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// using zapcore.NewMultiWriteSyncer and zapcore.Lock individually.
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func CombineWriteSyncers(writers ...zapcore.WriteSyncer) zapcore.WriteSyncer {
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if len(writers) == 0 {
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return zapcore.AddSync(ioutil.Discard)
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}
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return zapcore.Lock(zapcore.NewMultiWriteSyncer(writers...))
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}
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