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9465b593f9
We lost the nice context-stack [jobname][taskname][...] at the beginning of each log line when switching to logrus. Define some field names that define these contexts. Write a human-friendly formatter that presents these field names like the solution we had before logrus. Write some other formatters for logfmt and json output along the way. Limit ourselves to stdout logging for now.
104 lines
2.5 KiB
Go
104 lines
2.5 KiB
Go
package cmd
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import (
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"context"
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"fmt"
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"github.com/zrepl/zrepl/zfs"
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"time"
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)
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type Pruner struct {
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Now time.Time
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DryRun bool
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DatasetFilter zfs.DatasetFilter
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SnapshotPrefix string
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PrunePolicy PrunePolicy
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}
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type PruneResult struct {
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Filesystem *zfs.DatasetPath
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All []zfs.FilesystemVersion
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Keep []zfs.FilesystemVersion
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Remove []zfs.FilesystemVersion
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}
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func (p *Pruner) Run(ctx context.Context) (r []PruneResult, err error) {
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log := ctx.Value(contextKeyLog).(Logger)
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if p.DryRun {
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log.Info("doing dry run")
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}
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filesystems, err := zfs.ZFSListMapping(p.DatasetFilter)
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if err != nil {
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log.WithError(err).Error("error applying filesystem filter")
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return nil, err
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}
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if len(filesystems) <= 0 {
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log.Info("no filesystems matching filter")
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return nil, err
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}
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r = make([]PruneResult, 0, len(filesystems))
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for _, fs := range filesystems {
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log := log.WithField(logFSField, fs.ToString())
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fsversions, err := zfs.ZFSListFilesystemVersions(fs, &PrefixSnapshotFilter{p.SnapshotPrefix})
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if err != nil {
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log.WithError(err).Error("error listing filesytem versions")
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continue
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}
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if len(fsversions) == 0 {
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log.WithField("prefix", p.SnapshotPrefix).Info("no filesystem versions matching prefix")
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continue
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}
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keep, remove, err := p.PrunePolicy.Prune(fs, fsversions)
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if err != nil {
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log.WithError(err).Error("error evaluating prune policy")
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continue
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}
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log.WithField("fsversions", fsversions).
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WithField("keep", keep).
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WithField("remove", remove).
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Debug("prune policy debug dump")
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r = append(r, PruneResult{fs, fsversions, keep, remove})
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makeFields := func(v zfs.FilesystemVersion) (fields map[string]interface{}) {
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fields = make(map[string]interface{})
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fields["version"] = v.ToAbsPath(fs)
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timeSince := v.Creation.Sub(p.Now)
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fields["age_ns"] = timeSince
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const day time.Duration = 24 * time.Hour
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days := timeSince / day
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remainder := timeSince % day
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fields["age_str"] = fmt.Sprintf("%dd%s", days, remainder)
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return
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}
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for _, v := range remove {
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fields := makeFields(v)
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log.WithFields(fields).Info("destroying version")
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// echo what we'll do and exec zfs destroy if not dry run
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// TODO special handling for EBUSY (zfs hold)
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// TODO error handling for clones? just echo to cli, skip over, and exit with non-zero status code (we're idempotent)
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if !p.DryRun {
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err := zfs.ZFSDestroyFilesystemVersion(fs, v)
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if err != nil {
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// handle
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log.WithFields(fields).WithError(err).Error("error destroying version")
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}
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}
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}
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}
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return
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}
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