zrepl/cmd/config_job_pull.go

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package cmd
import (
"time"
"context"
"github.com/mitchellh/mapstructure"
"github.com/pkg/errors"
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"github.com/zrepl/zrepl/rpc"
"github.com/zrepl/zrepl/util"
)
type PullJob struct {
Name string
Connect RWCConnecter
Interval time.Duration
Mapping *DatasetMapFilter
// constructed from mapping during parsing
pruneFilter *DatasetMapFilter
SnapshotPrefix string
InitialReplPolicy InitialReplPolicy
Prune PrunePolicy
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Debug JobDebugSettings
task *Task
}
func parsePullJob(c JobParsingContext, name string, i map[string]interface{}) (j *PullJob, err error) {
var asMap struct {
Connect map[string]interface{}
Interval string
Mapping map[string]string
InitialReplPolicy string `mapstructure:"initial_repl_policy"`
Prune map[string]interface{}
SnapshotPrefix string `mapstructure:"snapshot_prefix"`
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Debug map[string]interface{}
}
if err = mapstructure.Decode(i, &asMap); err != nil {
err = errors.Wrap(err, "mapstructure error")
return nil, err
}
j = &PullJob{Name: name}
j.Connect, err = parseSSHStdinserverConnecter(asMap.Connect)
if err != nil {
err = errors.Wrap(err, "cannot parse 'connect'")
return nil, err
}
if j.Interval, err = parsePostitiveDuration(asMap.Interval); err != nil {
err = errors.Wrap(err, "cannot parse 'interval'")
return nil, err
}
j.Mapping, err = parseDatasetMapFilter(asMap.Mapping, false)
if err != nil {
err = errors.Wrap(err, "cannot parse 'mapping'")
return nil, err
}
if j.pruneFilter, err = j.Mapping.InvertedFilter(); err != nil {
err = errors.Wrap(err, "cannot automatically invert 'mapping' for prune job")
return nil, err
}
j.InitialReplPolicy, err = parseInitialReplPolicy(asMap.InitialReplPolicy, DEFAULT_INITIAL_REPL_POLICY)
if err != nil {
err = errors.Wrap(err, "cannot parse 'initial_repl_policy'")
return
}
if j.SnapshotPrefix, err = parseSnapshotPrefix(asMap.SnapshotPrefix); err != nil {
return
}
if j.Prune, err = parsePrunePolicy(asMap.Prune); err != nil {
err = errors.Wrap(err, "cannot parse prune policy")
return
}
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if err = mapstructure.Decode(asMap.Debug, &j.Debug); err != nil {
err = errors.Wrap(err, "cannot parse 'debug'")
return
}
return
}
func (j *PullJob) JobName() string {
return j.Name
}
func (j *PullJob) JobStart(ctx context.Context) {
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log := ctx.Value(contextKeyLog).(Logger)
defer log.Info("exiting")
j.task = NewTask("main", log)
log = j.task.Log()
ticker := time.NewTicker(j.Interval)
start:
log.Info("connecting")
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rwc, err := j.Connect.Connect()
if err != nil {
log.WithError(err).Error("error connecting")
return
}
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rwc, err = util.NewReadWriteCloserLogger(rwc, j.Debug.Conn.ReadDump, j.Debug.Conn.WriteDump)
if err != nil {
return
}
client := rpc.NewClient(rwc)
if j.Debug.RPC.Log {
client.SetLogger(log, true)
}
log.Info("starting pull")
pullLog := log.WithField(logTaskField, "pull")
puller := Puller{j.task, client, pullLog, j.Mapping, j.InitialReplPolicy}
if err = puller.doPull(); err != nil {
log.WithError(err).Error("error doing pull")
}
closeRPCWithTimeout(log, client, time.Second*10, "")
log.Info("starting prune")
prunectx := context.WithValue(ctx, contextKeyLog, log.WithField(logTaskField, "prune"))
pruner, err := j.Pruner(j.task, PrunePolicySideDefault, false)
if err != nil {
log.WithError(err).Error("error creating pruner")
return
}
pruner.Run(prunectx)
log.Info("finish prune")
log.Info("wait for next interval")
select {
case <-ctx.Done():
log.WithError(ctx.Err()).Info("context")
return
case <-ticker.C:
goto start
}
}
func (j *PullJob) JobStatus(ctxt context.Context) (*JobStatus, error) {
return &JobStatus{Tasks: []*TaskStatus{j.task.Status()}}, nil
}
func (j *PullJob) Pruner(task *Task, side PrunePolicySide, dryRun bool) (p Pruner, err error) {
p = Pruner{
task,
time.Now(),
dryRun,
j.pruneFilter,
j.SnapshotPrefix,
j.Prune,
}
return
}
func (j *PullJob) doRun(ctx context.Context) {
}