133 lines
3.7 KiB
Go
133 lines
3.7 KiB
Go
package state
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import (
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"encoding/json"
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"fmt"
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"strings"
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"github.com/hashicorp/nomad/client/allocrunner/taskrunner/state"
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"github.com/hashicorp/nomad/helper/uuid"
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"github.com/hashicorp/nomad/nomad/structs"
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"github.com/hashicorp/nomad/plugins/drivers"
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pstructs "github.com/hashicorp/nomad/plugins/shared/structs"
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)
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// allocRunnerMutableState08 is state that had to be written on each save as it
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// changed over the life-cycle of the alloc_runner in Nomad 0.8.
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//
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// https://github.com/hashicorp/nomad/blob/v0.8.6/client/alloc_runner.go#L146-L153
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//
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type allocRunnerMutableState08 struct {
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// AllocClientStatus does not need to be upgraded as it is computed
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// from task states.
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AllocClientStatus string
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// AllocClientDescription does not need to be upgraded as it is computed
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// from task states.
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AllocClientDescription string
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TaskStates map[string]*structs.TaskState
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DeploymentStatus *structs.AllocDeploymentStatus
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}
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// taskRunnerState08 was used to snapshot the state of the task runner in Nomad
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// 0.8.
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//
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// https://github.com/hashicorp/nomad/blob/v0.8.6/client/task_runner.go#L188-L197
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// COMPAT(0.10): Allows upgrading from 0.8.X to 0.9.0.
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type taskRunnerState08 struct {
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Version string
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HandleID string
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ArtifactDownloaded bool
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TaskDirBuilt bool
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PayloadRendered bool
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DriverNetwork *drivers.DriverNetwork
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// Created Resources are no longer used.
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//CreatedResources *driver.CreatedResources
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}
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type TaskRunnerHandle08 struct {
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// Docker specific handle info
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ContainerID string `json:"ContainerID"`
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Image string `json:"Image"`
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// LXC specific handle info
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ContainerName string `json:"ContainerName"`
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LxcPath string `json:"LxcPath"`
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// Executor reattach config
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PluginConfig struct {
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Pid int `json:"Pid"`
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AddrNet string `json:"AddrNet"`
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AddrName string `json:"AddrName"`
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} `json:"PluginConfig"`
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}
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func (t *TaskRunnerHandle08) ReattachConfig() *pstructs.ReattachConfig {
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return &pstructs.ReattachConfig{
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Network: t.PluginConfig.AddrNet,
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Addr: t.PluginConfig.AddrName,
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Pid: t.PluginConfig.Pid,
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}
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}
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func (t *taskRunnerState08) Upgrade(allocID, taskName string) (*state.LocalState, error) {
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ls := state.NewLocalState()
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// Reuse DriverNetwork
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ls.DriverNetwork = t.DriverNetwork
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// Upgrade artifact state
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ls.Hooks["artifacts"] = &state.HookState{
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PrestartDone: t.ArtifactDownloaded,
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}
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// Upgrade task dir state
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ls.Hooks["task_dir"] = &state.HookState{
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Data: map[string]string{
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// "is_done" is equivalent to task_dir_hook.TaskDirHookIsDoneKey
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// Does not import to avoid import cycle
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"is_done": fmt.Sprintf("%v", t.TaskDirBuilt),
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},
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}
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// Upgrade dispatch payload state
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ls.Hooks["dispatch_payload"] = &state.HookState{
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PrestartDone: t.PayloadRendered,
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}
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// Add necessary fields to TaskConfig
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ls.TaskHandle = drivers.NewTaskHandle(drivers.Pre09TaskHandleVersion)
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ls.TaskHandle.Config = &drivers.TaskConfig{
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ID: fmt.Sprintf("pre09-%s", uuid.Generate()),
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Name: taskName,
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AllocID: allocID,
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}
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ls.TaskHandle.State = drivers.TaskStateUnknown
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// The docker driver prefixed the handle with 'DOCKER:'
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// Strip so that it can be unmarshalled
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data := strings.TrimPrefix(t.HandleID, "DOCKER:")
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// The pre09 driver handle ID is given to the driver. It is unmarshalled
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// here to check for errors
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if _, err := UnmarshalPre09HandleID([]byte(data)); err != nil {
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return nil, err
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}
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ls.TaskHandle.DriverState = []byte(data)
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return ls, nil
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}
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// UnmarshalPre09HandleID decodes the pre09 json encoded handle ID
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func UnmarshalPre09HandleID(raw []byte) (*TaskRunnerHandle08, error) {
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var handle TaskRunnerHandle08
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if err := json.Unmarshal(raw, &handle); err != nil {
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return nil, fmt.Errorf("failed to decode 0.8 driver state: %v", err)
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}
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return &handle, nil
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}
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