109 lines
2.8 KiB
Go
109 lines
2.8 KiB
Go
package taskrunner
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import (
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"context"
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"fmt"
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"time"
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cstructs "github.com/hashicorp/nomad/client/structs"
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"github.com/hashicorp/nomad/nomad/structs"
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"github.com/hashicorp/nomad/plugins/drivers"
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)
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// NewDriverHandle returns a handle for task operations on a specific task
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func NewDriverHandle(driver drivers.DriverPlugin, taskID string, task *structs.Task, net *drivers.DriverNetwork) *DriverHandle {
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return &DriverHandle{
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driver: driver,
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net: net,
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taskID: taskID,
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task: task,
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}
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}
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// DriverHandle encapsulates a driver plugin client and task identifier and exposes
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// an api to perform driver operations on the task
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type DriverHandle struct {
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driver drivers.DriverPlugin
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net *drivers.DriverNetwork
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task *structs.Task
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taskID string
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}
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func (h *DriverHandle) ID() string {
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return h.taskID
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}
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func (h *DriverHandle) WaitCh(ctx context.Context) (<-chan *drivers.ExitResult, error) {
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return h.driver.WaitTask(ctx, h.taskID)
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}
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func (h *DriverHandle) Update(task *structs.Task) error {
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return nil
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}
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func (h *DriverHandle) Kill() error {
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return h.driver.StopTask(h.taskID, h.task.KillTimeout, h.task.KillSignal)
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}
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func (h *DriverHandle) Stats(ctx context.Context, interval time.Duration) (<-chan *cstructs.TaskResourceUsage, error) {
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return h.driver.TaskStats(ctx, h.taskID, interval)
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}
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func (h *DriverHandle) Signal(s string) error {
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return h.driver.SignalTask(h.taskID, s)
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}
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// Exec is the handled used by client endpoint handler to invoke the appropriate task driver exec.
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func (h *DriverHandle) Exec(timeout time.Duration, cmd string, args []string) ([]byte, int, error) {
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command := append([]string{cmd}, args...)
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res, err := h.driver.ExecTask(h.taskID, command, timeout)
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if err != nil {
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return nil, 0, err
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}
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return res.Stdout, res.ExitResult.ExitCode, res.ExitResult.Err
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}
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// ExecStreaming is the handled used by client endpoint handler to invoke the appropriate task driver exec.
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// while allowing to stream input and output
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func (h *DriverHandle) ExecStreaming(ctx context.Context,
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command []string,
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tty bool,
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stream drivers.ExecTaskStream) error {
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if impl, ok := h.driver.(drivers.ExecTaskStreamingRawDriver); ok {
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return impl.ExecTaskStreamingRaw(ctx, h.taskID, command, tty, stream)
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}
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d, ok := h.driver.(drivers.ExecTaskStreamingDriver)
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if !ok {
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return fmt.Errorf("task driver does not support exec")
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}
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execOpts, doneCh := drivers.StreamToExecOptions(
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ctx, command, tty, stream)
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result, err := d.ExecTaskStreaming(ctx, h.taskID, execOpts)
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if err != nil {
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return err
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}
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execOpts.Stdout.Close()
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execOpts.Stderr.Close()
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select {
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case err = <-doneCh:
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case <-ctx.Done():
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err = fmt.Errorf("exec task timed out: %v", ctx.Err())
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}
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if err != nil {
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return err
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}
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return stream.Send(drivers.NewExecStreamingResponseExit(result.ExitCode))
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}
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func (h *DriverHandle) Network() *drivers.DriverNetwork {
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return h.net
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}
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