[pkg] panic if no space is left #3636
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,73 @@ | ||
| // Copyright (c) 2022 IoTeX Foundation | ||
| // This is an alpha (internal) release and is not suitable for production. This source code is provided 'as is' and no | ||
| // warranties are given as to title or non-infringement, merchantability or fitness for purpose and, to the extent | ||
| // permitted by law, all liability for your use of the code is disclaimed. This source code is governed by Apache | ||
| // License 2.0 that can be found in the LICENSE file. | ||
|
|
||
| package fsnotify | ||
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||
| import ( | ||
| "context" | ||
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| "github.com/fsnotify/fsnotify" | ||
| "github.com/shirou/gopsutil/v3/disk" | ||
| "go.uber.org/zap" | ||
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| "github.com/iotexproject/iotex-core/pkg/log" | ||
| ) | ||
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| // Watch creates dir watcher to hanlde events from os in loop | ||
| func Watch(ctx context.Context, dirs ...string) { | ||
| watcher, err := fsnotify.NewWatcher() | ||
| if err != nil { | ||
| log.L().Fatal("Failed to create fsnotify watcher.", zap.Error(err)) | ||
| } | ||
| defer watcher.Close() | ||
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| for _, dir := range dirs { | ||
| if err = watcher.Add(dir); err != nil { | ||
| log.L().Fatal("Failed to watch dir: "+dir, zap.Error(err)) | ||
| } | ||
| } | ||
| log.S().Infof("Watch dirs: %+v", dirs) | ||
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| watchLoop(ctx, watcher) | ||
| } | ||
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| // watchLoop receives events and errors from os | ||
| func watchLoop(ctx context.Context, watcher *fsnotify.Watcher) { | ||
| for { | ||
| select { | ||
| case <-ctx.Done(): | ||
| return | ||
| case ev, ok := <-watcher.Events: | ||
| if !ok { | ||
| log.L().Error("Failed to get watcher events.") | ||
| continue | ||
| } | ||
| // check disk space per write operation | ||
| if ev.Has(fsnotify.Write) { | ||
|
There was a problem hiding this comment. It's still left enough space to run program even if |
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| checkDiskSpace(ctx) | ||
|
There was a problem hiding this comment. all filesystem write ops trig a check, may inefficient |
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| } | ||
| case err, ok := <-watcher.Errors: | ||
| if !ok { | ||
| log.L().Error("Failed to get watcher errors.") | ||
| continue | ||
| } | ||
| log.L().Error("watch file error", zap.Error(err)) | ||
| } | ||
| } | ||
| } | ||
|
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| // checkDiskSpace returns the disk usage info | ||
| func checkDiskSpace(ctx context.Context) { | ||
| usage, err := disk.Usage("/") | ||
|
There was a problem hiding this comment. if os disk partition like this and iotex-core run within /run, the check may not work There was a problem hiding this comment.
There was a problem hiding this comment. |
||
| if err != nil { | ||
| log.L().Error("Failed to get disk usage.", zap.Error(err)) | ||
| return | ||
| } | ||
| // panic if no space or no inodes | ||
| if usage.Free == 0 || usage.InodesFree == 0 { | ||
| log.L().Fatal("No space in device.", zap.Float64("UsedPercent", usage.UsedPercent), zap.Float64("InodesUsedPercent", usage.InodesUsedPercent)) | ||
| } | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| // Copyright (c) 2022 IoTeX Foundation | ||
| // This is an alpha (internal) release and is not suitable for production. This source code is provided 'as is' and no | ||
| // warranties are given as to title or non-infringement, merchantability or fitness for purpose and, to the extent | ||
| // permitted by law, all liability for your use of the code is disclaimed. This source code is governed by Apache | ||
| // License 2.0 that can be found in the LICENSE file. | ||
|
|
||
| package fsnotify | ||
|
|
||
| import ( | ||
| "context" | ||
| "os" | ||
| "testing" | ||
| "time" | ||
|
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| "github.com/stretchr/testify/require" | ||
|
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| "github.com/iotexproject/iotex-core/testutil" | ||
| ) | ||
|
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| func TestWatch(t *testing.T) { | ||
| var ( | ||
| require = require.New(t) | ||
| dir = t.TempDir() | ||
| times int | ||
| ) | ||
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| ctx, cancel := context.WithCancel(context.Background()) | ||
| go Watch(ctx, dir) | ||
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| f, err := os.CreateTemp(dir, "log") | ||
| require.NoError(err) | ||
| defer f.Close() | ||
|
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| require.NoError(testutil.WaitUntil(100*time.Millisecond, 1*time.Second, func() (b bool, e error) { | ||
| err = os.WriteFile(f.Name(), []byte("test"), 0666) | ||
| require.NoError(err) | ||
| times++ | ||
| return times >= 5, nil | ||
| })) | ||
| cancel() | ||
| } |
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when does an event come