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https://github.com/zrepl/zrepl.git
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17add553d3
Changes done so far:
- signal to route concurrency request up to the stepQueue
- pretty hacky, no status reporting yet
- stepQueue upsizing (confirmed that it works, no intermediary commit)
Stuck at: stepQueue downsizing
- idea was to have the stepQueue signal to the activated step that it
should suspend
- ideally, we'd just kill everything associated with the step and track
it as restartable
- the driver model doesn't allow for that though within an attempt
- would need to start a separate run for the step
- less perfect: tell the downsized steps to stop copying, but leave
all zfs sends + rpc conns open
- - doesn't give back the resoures that a step aquired before
being selected as downsize victim (open zfs processe + TCP conn,
some memory in the pipe)
- - looks weird to user if the ps aux
- + re-waking a step is easy: just tell it to proceed with copying
- (the impl would likely pass a check function down into Step.do
and have it check that functino periodically. the suspend should
be acknowledged, and stepQueue should only remove the step from
the active queue _after_ that step has acknowledged that is
suspended)
48 lines
986 B
Go
48 lines
986 B
Go
package client
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import (
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"github.com/pkg/errors"
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"github.com/zrepl/zrepl/cli"
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"github.com/zrepl/zrepl/config"
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"github.com/zrepl/zrepl/daemon"
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)
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var SignalCmd = &cli.Subcommand{
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Use: "signal [wakeup|reset] JOB [DATA]",
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Short: "wake up a job from wait state or abort its current invocation",
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Run: func(subcommand *cli.Subcommand, args []string) error {
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return runSignalCmd(subcommand.Config(), args)
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},
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}
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func runSignalCmd(config *config.Config, args []string) error {
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if len(args) < 2 || len(args) > 3 {
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return errors.Errorf("Expected 2 arguments: [wakeup|reset|set-concurrency] JOB [DATA]")
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}
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var data string
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if len(args) == 3 {
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data = args[2]
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}
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httpc, err := controlHttpClient(config.Global.Control.SockPath)
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if err != nil {
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return err
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}
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err = jsonRequestResponse(httpc, daemon.ControlJobEndpointSignal,
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struct {
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Name string
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Op string
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Data string
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}{
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Name: args[1],
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Op: args[0],
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Data: data,
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},
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struct{}{},
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)
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return err
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}
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