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Improve VM shutdown/reboot experience #362

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merged 2 commits into from
Jan 4, 2024
Merged

Improve VM shutdown/reboot experience #362

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602d93b
incusd/instance/qemu: Add ErrExecDisconnected
stgraber Jan 3, 2024
578f58c
incusd: Make VM shutdown/reboot exit cleanly
stgraber Jan 3, 2024
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8 changes: 8 additions & 0 deletions cmd/incusd/instance_exec.go
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,7 @@ import (
"github.com/lxc/incus/internal/server/cluster"
"github.com/lxc/incus/internal/server/db/operationtype"
"github.com/lxc/incus/internal/server/instance"
"github.com/lxc/incus/internal/server/instance/drivers"
"github.com/lxc/incus/internal/server/instance/instancetype"
"github.com/lxc/incus/internal/server/operations"
"github.com/lxc/incus/internal/server/request"
Expand Down Expand Up @@ -286,7 +287,14 @@ func (s *execWs) Do(op *operations.Operation) error {
_ = pty.Close()
}

// Make VM disconnections (shutdown/reboot) match containers.
if cmdErr == drivers.ErrExecDisconnected {
cmdResult = 129
cmdErr = nil
}

metadata := jmap.Map{"return": cmdResult}

err = op.ExtendMetadata(metadata)
if err != nil {
return err
Expand Down
5 changes: 4 additions & 1 deletion internal/server/instance/drivers/driver_qemu_cmd.go
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,9 @@ import (
"github.com/lxc/incus/shared/logger"
)

// ErrExecDisconnected is returned when the guest disconnects the exec session.
var ErrExecDisconnected = fmt.Errorf("Disconnected")

// Cmd represents a running command for an Qemu VM.
type qemuCmd struct {
attachedChildPid int
Expand Down Expand Up @@ -78,7 +81,7 @@ func (c *qemuCmd) Wait() (int, error) {
// so we inform the client of the disconnection with a more
// descriptive message.
if errors.Is(err, io.EOF) {
return exitStatus, fmt.Errorf("Disconnected")
return exitStatus, ErrExecDisconnected
}

return exitStatus, err
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