745 lines
17 KiB
Go
745 lines
17 KiB
Go
package jobspec
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import (
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"fmt"
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"strings"
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"time"
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multierror "github.com/hashicorp/go-multierror"
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"github.com/hashicorp/hcl"
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"github.com/hashicorp/hcl/hcl/ast"
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"github.com/hashicorp/nomad/api"
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"github.com/hashicorp/nomad/helper/pointer"
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"github.com/mitchellh/mapstructure"
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)
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var (
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commonTaskKeys = []string{
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"driver",
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"user",
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"config",
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"env",
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"resources",
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"meta",
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"logs",
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"kill_timeout",
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"shutdown_delay",
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"kill_signal",
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"scaling",
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}
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normalTaskKeys = append(commonTaskKeys,
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"artifact",
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"constraint",
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"affinity",
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"dispatch_payload",
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"lifecycle",
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"leader",
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"restart",
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"service",
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"template",
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"vault",
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"kind",
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"volume_mount",
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"csi_plugin",
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)
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sidecarTaskKeys = append(commonTaskKeys,
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"name",
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)
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)
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func parseTasks(result *[]*api.Task, list *ast.ObjectList) error {
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list = list.Children()
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if len(list.Items) == 0 {
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return nil
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}
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// Go through each object and turn it into an actual result.
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seen := make(map[string]struct{})
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for _, item := range list.Items {
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n := item.Keys[0].Token.Value().(string)
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// Make sure we haven't already found this
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if _, ok := seen[n]; ok {
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return fmt.Errorf("task '%s' defined more than once", n)
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}
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seen[n] = struct{}{}
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t, err := parseTask(item, normalTaskKeys)
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if err != nil {
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return multierror.Prefix(err, fmt.Sprintf("'%s',", n))
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}
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t.Name = n
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*result = append(*result, t)
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}
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return nil
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}
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func parseTask(item *ast.ObjectItem, keys []string) (*api.Task, error) {
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// We need this later
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var listVal *ast.ObjectList
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if ot, ok := item.Val.(*ast.ObjectType); ok {
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listVal = ot.List
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} else {
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return nil, fmt.Errorf("should be an object")
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}
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// Check for invalid keys
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if err := checkHCLKeys(listVal, keys); err != nil {
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return nil, err
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}
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var m map[string]interface{}
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if err := hcl.DecodeObject(&m, item.Val); err != nil {
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return nil, err
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}
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delete(m, "artifact")
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delete(m, "config")
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delete(m, "constraint")
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delete(m, "affinity")
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delete(m, "dispatch_payload")
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delete(m, "lifecycle")
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delete(m, "env")
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delete(m, "logs")
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delete(m, "meta")
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delete(m, "resources")
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delete(m, "restart")
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delete(m, "service")
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delete(m, "template")
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delete(m, "vault")
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delete(m, "volume_mount")
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delete(m, "csi_plugin")
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delete(m, "scaling")
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// Build the task
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var t api.Task
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dec, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
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DecodeHook: mapstructure.StringToTimeDurationHookFunc(),
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WeaklyTypedInput: true,
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Result: &t,
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})
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if err != nil {
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return nil, err
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}
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if err := dec.Decode(m); err != nil {
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return nil, err
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}
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// If we have env, then parse them
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if o := listVal.Filter("env"); len(o.Items) > 0 {
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for _, o := range o.Elem().Items {
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var m map[string]interface{}
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if err := hcl.DecodeObject(&m, o.Val); err != nil {
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return nil, err
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}
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if err := mapstructure.WeakDecode(m, &t.Env); err != nil {
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return nil, err
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}
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}
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}
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if o := listVal.Filter("service"); len(o.Items) > 0 {
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services, err := parseServices(o)
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if err != nil {
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return nil, err
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}
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t.Services = services
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}
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if o := listVal.Filter("csi_plugin"); len(o.Items) > 0 {
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if len(o.Items) != 1 {
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return nil, fmt.Errorf("csi_plugin -> Expected single block, got %d", len(o.Items))
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}
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i := o.Elem().Items[0]
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var m map[string]interface{}
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var cfg api.TaskCSIPluginConfig
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if err := hcl.DecodeObject(&m, i.Val); err != nil {
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return nil, err
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}
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dec, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
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DecodeHook: mapstructure.StringToTimeDurationHookFunc(),
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WeaklyTypedInput: true,
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Result: &cfg,
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})
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if err != nil {
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return nil, err
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}
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if err := dec.Decode(m); err != nil {
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return nil, err
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}
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t.CSIPluginConfig = &cfg
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}
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// If we have config, then parse that
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if o := listVal.Filter("config"); len(o.Items) > 0 {
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for _, o := range o.Elem().Items {
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var m map[string]interface{}
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if err := hcl.DecodeObject(&m, o.Val); err != nil {
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return nil, err
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}
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if err := mapstructure.WeakDecode(m, &t.Config); err != nil {
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return nil, err
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}
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}
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}
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// Parse constraints
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if o := listVal.Filter("constraint"); len(o.Items) > 0 {
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if err := parseConstraints(&t.Constraints, o); err != nil {
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return nil, multierror.Prefix(err, "constraint ->")
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}
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}
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// Parse affinities
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if o := listVal.Filter("affinity"); len(o.Items) > 0 {
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if err := parseAffinities(&t.Affinities, o); err != nil {
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return nil, multierror.Prefix(err, "affinity ->")
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}
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}
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// Parse out meta fields. These are in HCL as a list so we need
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// to iterate over them and merge them.
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if metaO := listVal.Filter("meta"); len(metaO.Items) > 0 {
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for _, o := range metaO.Elem().Items {
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var m map[string]interface{}
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if err := hcl.DecodeObject(&m, o.Val); err != nil {
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return nil, err
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}
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if err := mapstructure.WeakDecode(m, &t.Meta); err != nil {
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return nil, err
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}
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}
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}
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// Parse volume mounts
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if o := listVal.Filter("volume_mount"); len(o.Items) > 0 {
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if err := parseVolumeMounts(&t.VolumeMounts, o); err != nil {
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return nil, multierror.Prefix(err, "volume_mount ->")
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}
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}
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// If we have resources, then parse that
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if o := listVal.Filter("resources"); len(o.Items) > 0 {
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var r api.Resources
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if err := parseResources(&r, o); err != nil {
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return nil, multierror.Prefix(err, "resources ->")
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}
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t.Resources = &r
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}
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// Parse restart policy
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if o := listVal.Filter("restart"); len(o.Items) > 0 {
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if err := parseRestartPolicy(&t.RestartPolicy, o); err != nil {
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return nil, multierror.Prefix(err, "restart ->")
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}
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}
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// If we have logs then parse that
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if o := listVal.Filter("logs"); len(o.Items) > 0 {
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if len(o.Items) > 1 {
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return nil, fmt.Errorf("only one logs block is allowed in a Task. Number of logs block found: %d", len(o.Items))
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}
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var m map[string]interface{}
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logsBlock := o.Items[0]
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// Check for invalid keys
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valid := []string{
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"max_files",
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"max_file_size",
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}
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if err := checkHCLKeys(logsBlock.Val, valid); err != nil {
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return nil, multierror.Prefix(err, "logs ->")
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}
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if err := hcl.DecodeObject(&m, logsBlock.Val); err != nil {
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return nil, err
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}
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var log api.LogConfig
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if err := mapstructure.WeakDecode(m, &log); err != nil {
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return nil, err
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}
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t.LogConfig = &log
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}
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// Parse artifacts
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if o := listVal.Filter("artifact"); len(o.Items) > 0 {
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if err := parseArtifacts(&t.Artifacts, o); err != nil {
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return nil, multierror.Prefix(err, "artifact ->")
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}
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}
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// Parse templates
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if o := listVal.Filter("template"); len(o.Items) > 0 {
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if err := parseTemplates(&t.Templates, o); err != nil {
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return nil, multierror.Prefix(err, "template ->")
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}
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}
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// Parse scaling policies
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if o := listVal.Filter("scaling"); len(o.Items) > 0 {
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if err := parseTaskScalingPolicies(&t.ScalingPolicies, o); err != nil {
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return nil, err
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}
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}
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// If we have a vault block, then parse that
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if o := listVal.Filter("vault"); len(o.Items) > 0 {
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v := &api.Vault{
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Env: boolToPtr(true),
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ChangeMode: stringToPtr("restart"),
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}
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if err := parseVault(v, o); err != nil {
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return nil, multierror.Prefix(err, "vault ->")
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}
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t.Vault = v
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}
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// If we have a dispatch_payload block parse that
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if o := listVal.Filter("dispatch_payload"); len(o.Items) > 0 {
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if len(o.Items) > 1 {
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return nil, fmt.Errorf("only one dispatch_payload block is allowed in a task. Number of dispatch_payload blocks found: %d", len(o.Items))
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}
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var m map[string]interface{}
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dispatchBlock := o.Items[0]
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// Check for invalid keys
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valid := []string{
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"file",
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}
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if err := checkHCLKeys(dispatchBlock.Val, valid); err != nil {
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return nil, multierror.Prefix(err, "dispatch_payload ->")
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}
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if err := hcl.DecodeObject(&m, dispatchBlock.Val); err != nil {
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return nil, err
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}
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t.DispatchPayload = &api.DispatchPayloadConfig{}
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if err := mapstructure.WeakDecode(m, t.DispatchPayload); err != nil {
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return nil, err
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}
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}
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// If we have a lifecycle block parse that
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if o := listVal.Filter("lifecycle"); len(o.Items) > 0 {
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if len(o.Items) > 1 {
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return nil, fmt.Errorf("only one lifecycle block is allowed in a task. Number of lifecycle blocks found: %d", len(o.Items))
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}
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var m map[string]interface{}
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lifecycleBlock := o.Items[0]
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// Check for invalid keys
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valid := []string{
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"hook",
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"sidecar",
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}
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if err := checkHCLKeys(lifecycleBlock.Val, valid); err != nil {
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return nil, multierror.Prefix(err, "lifecycle ->")
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}
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if err := hcl.DecodeObject(&m, lifecycleBlock.Val); err != nil {
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return nil, err
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}
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t.Lifecycle = &api.TaskLifecycle{}
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if err := mapstructure.WeakDecode(m, t.Lifecycle); err != nil {
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return nil, err
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}
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}
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return &t, nil
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}
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func parseArtifacts(result *[]*api.TaskArtifact, list *ast.ObjectList) error {
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for _, o := range list.Elem().Items {
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// Check for invalid keys
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valid := []string{
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"source",
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"options",
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"headers",
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"mode",
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"destination",
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}
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if err := checkHCLKeys(o.Val, valid); err != nil {
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return err
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}
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var m map[string]interface{}
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if err := hcl.DecodeObject(&m, o.Val); err != nil {
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return err
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}
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delete(m, "options")
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var ta api.TaskArtifact
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if err := mapstructure.WeakDecode(m, &ta); err != nil {
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return err
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}
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var optionList *ast.ObjectList
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if ot, ok := o.Val.(*ast.ObjectType); ok {
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optionList = ot.List
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} else {
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return fmt.Errorf("artifact should be an object")
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}
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if oo := optionList.Filter("options"); len(oo.Items) > 0 {
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options := make(map[string]string)
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if err := parseArtifactOption(options, oo); err != nil {
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return multierror.Prefix(err, "options: ")
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}
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ta.GetterOptions = options
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}
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*result = append(*result, &ta)
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}
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return nil
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}
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func parseArtifactOption(result map[string]string, list *ast.ObjectList) error {
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list = list.Elem()
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if len(list.Items) > 1 {
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return fmt.Errorf("only one 'options' block allowed per artifact")
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}
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// Get our resource object
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o := list.Items[0]
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var m map[string]interface{}
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if err := hcl.DecodeObject(&m, o.Val); err != nil {
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return err
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}
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if err := mapstructure.WeakDecode(m, &result); err != nil {
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return err
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}
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return nil
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}
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func parseTemplates(result *[]*api.Template, list *ast.ObjectList) error {
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for _, o := range list.Elem().Items {
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// we'll need a list of all ast objects for later
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var listVal *ast.ObjectList
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if ot, ok := o.Val.(*ast.ObjectType); ok {
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listVal = ot.List
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} else {
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return fmt.Errorf("should be an object")
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}
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// Check for invalid keys
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valid := []string{
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"change_mode",
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"change_signal",
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"change_script",
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"data",
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"destination",
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"left_delimiter",
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"perms",
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"uid",
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"gid",
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"right_delimiter",
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"source",
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"splay",
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"env",
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"vault_grace", //COMPAT(0.12) not used; emits warning in 0.11.
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"wait",
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"error_on_missing_key",
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}
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if err := checkHCLKeys(o.Val, valid); err != nil {
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return err
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}
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var m map[string]interface{}
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if err := hcl.DecodeObject(&m, o.Val); err != nil {
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return err
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}
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delete(m, "change_script") // change_script is its own object
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templ := &api.Template{
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ChangeMode: stringToPtr("restart"),
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Splay: timeToPtr(5 * time.Second),
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Perms: stringToPtr("0644"),
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Uid: pointer.Of(-1),
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Gid: pointer.Of(-1),
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ErrMissingKey: pointer.Of(false),
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}
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dec, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
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DecodeHook: mapstructure.StringToTimeDurationHookFunc(),
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WeaklyTypedInput: true,
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Result: templ,
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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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if err := dec.Decode(m); err != nil {
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return err
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}
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// If we have change_script, parse it
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if o := listVal.Filter("change_script"); len(o.Items) > 0 {
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if len(o.Items) != 1 {
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return fmt.Errorf(
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"change_script -> expected single block, got %d", len(o.Items),
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)
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}
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var m map[string]interface{}
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changeScriptBlock := o.Items[0]
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// check for invalid fields
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valid := []string{"command", "args", "timeout", "fail_on_error"}
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if err := checkHCLKeys(changeScriptBlock.Val, valid); err != nil {
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return multierror.Prefix(err, "change_script ->")
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}
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if err := hcl.DecodeObject(&m, changeScriptBlock.Val); err != nil {
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return err
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}
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templ.ChangeScript = &api.ChangeScript{}
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dec, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
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DecodeHook: mapstructure.StringToTimeDurationHookFunc(),
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WeaklyTypedInput: true,
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Result: templ.ChangeScript,
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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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if err := dec.Decode(m); err != nil {
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return err
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}
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}
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*result = append(*result, templ)
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}
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return nil
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}
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func parseTaskScalingPolicies(result *[]*api.ScalingPolicy, list *ast.ObjectList) error {
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if len(list.Items) == 0 {
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return nil
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}
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errPrefix := "scaling ->"
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// Go through each object and turn it into an actual result.
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seen := make(map[string]bool)
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for _, item := range list.Items {
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if l := len(item.Keys); l == 0 {
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return multierror.Prefix(fmt.Errorf("task scaling policy missing name"), errPrefix)
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} else if l > 1 {
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return multierror.Prefix(fmt.Errorf("task scaling policy should only have one name"), errPrefix)
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}
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n := item.Keys[0].Token.Value().(string)
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errPrefix = fmt.Sprintf("scaling[%v] ->", n)
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var policyType string
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switch strings.ToLower(n) {
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case "cpu":
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policyType = "vertical_cpu"
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case "mem":
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policyType = "vertical_mem"
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default:
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return multierror.Prefix(fmt.Errorf(`scaling policy name must be "cpu" or "mem"`), errPrefix)
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}
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|
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// Make sure we haven't already found this
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|
if seen[n] {
|
|
return multierror.Prefix(fmt.Errorf("scaling policy cannot be defined more than once"), errPrefix)
|
|
}
|
|
seen[n] = true
|
|
|
|
p, err := parseScalingPolicy(item)
|
|
if err != nil {
|
|
return multierror.Prefix(err, errPrefix)
|
|
}
|
|
|
|
if p.Type == "" {
|
|
p.Type = policyType
|
|
} else if p.Type != policyType {
|
|
return multierror.Prefix(fmt.Errorf("policy had invalid 'type': %q", p.Type), errPrefix)
|
|
}
|
|
|
|
*result = append(*result, p)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func parseResources(result *api.Resources, list *ast.ObjectList) error {
|
|
list = list.Elem()
|
|
if len(list.Items) == 0 {
|
|
return nil
|
|
}
|
|
if len(list.Items) > 1 {
|
|
return fmt.Errorf("only one 'resource' block allowed per task")
|
|
}
|
|
|
|
// Get our resource object
|
|
o := list.Items[0]
|
|
|
|
// We need this later
|
|
var listVal *ast.ObjectList
|
|
if ot, ok := o.Val.(*ast.ObjectType); ok {
|
|
listVal = ot.List
|
|
} else {
|
|
return fmt.Errorf("resource: should be an object")
|
|
}
|
|
|
|
// Check for invalid keys
|
|
valid := []string{
|
|
"cpu",
|
|
"iops", // COMPAT(0.10): Remove after one release to allow it to be removed from jobspecs
|
|
"disk",
|
|
"memory",
|
|
"memory_max",
|
|
"network",
|
|
"device",
|
|
"cores",
|
|
}
|
|
if err := checkHCLKeys(listVal, valid); err != nil {
|
|
return multierror.Prefix(err, "resources ->")
|
|
}
|
|
|
|
var m map[string]interface{}
|
|
if err := hcl.DecodeObject(&m, o.Val); err != nil {
|
|
return err
|
|
}
|
|
delete(m, "network")
|
|
delete(m, "device")
|
|
|
|
if err := mapstructure.WeakDecode(m, result); err != nil {
|
|
return err
|
|
}
|
|
|
|
// Parse the network resources
|
|
if o := listVal.Filter("network"); len(o.Items) > 0 {
|
|
r, err := ParseNetwork(o)
|
|
if err != nil {
|
|
return fmt.Errorf("resource, %v", err)
|
|
}
|
|
result.Networks = []*api.NetworkResource{r}
|
|
}
|
|
|
|
// Parse the device resources
|
|
if o := listVal.Filter("device"); len(o.Items) > 0 {
|
|
result.Devices = make([]*api.RequestedDevice, len(o.Items))
|
|
for idx, do := range o.Items {
|
|
if l := len(do.Keys); l == 0 {
|
|
return multierror.Prefix(fmt.Errorf("missing device name"), fmt.Sprintf("resources, device[%d]->", idx))
|
|
} else if l > 1 {
|
|
return multierror.Prefix(fmt.Errorf("only one name may be specified"), fmt.Sprintf("resources, device[%d]->", idx))
|
|
}
|
|
name := do.Keys[0].Token.Value().(string)
|
|
|
|
// Value should be an object
|
|
var listVal *ast.ObjectList
|
|
if ot, ok := do.Val.(*ast.ObjectType); ok {
|
|
listVal = ot.List
|
|
} else {
|
|
return fmt.Errorf("device should be an object")
|
|
}
|
|
|
|
// Check for invalid keys
|
|
valid := []string{
|
|
"name",
|
|
"count",
|
|
"affinity",
|
|
"constraint",
|
|
}
|
|
if err := checkHCLKeys(do.Val, valid); err != nil {
|
|
return multierror.Prefix(err, fmt.Sprintf("resources, device[%d]->", idx))
|
|
}
|
|
|
|
// Set the name
|
|
var r api.RequestedDevice
|
|
r.Name = name
|
|
|
|
var m map[string]interface{}
|
|
if err := hcl.DecodeObject(&m, do.Val); err != nil {
|
|
return err
|
|
}
|
|
|
|
delete(m, "constraint")
|
|
delete(m, "affinity")
|
|
|
|
if err := mapstructure.WeakDecode(m, &r); err != nil {
|
|
return err
|
|
}
|
|
|
|
// Parse constraints
|
|
if o := listVal.Filter("constraint"); len(o.Items) > 0 {
|
|
if err := parseConstraints(&r.Constraints, o); err != nil {
|
|
return multierror.Prefix(err, "constraint ->")
|
|
}
|
|
}
|
|
|
|
// Parse affinities
|
|
if o := listVal.Filter("affinity"); len(o.Items) > 0 {
|
|
if err := parseAffinities(&r.Affinities, o); err != nil {
|
|
return multierror.Prefix(err, "affinity ->")
|
|
}
|
|
}
|
|
|
|
result.Devices[idx] = &r
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func parseVolumeMounts(out *[]*api.VolumeMount, list *ast.ObjectList) error {
|
|
mounts := make([]*api.VolumeMount, len(list.Items))
|
|
|
|
for i, item := range list.Items {
|
|
valid := []string{
|
|
"volume",
|
|
"read_only",
|
|
"destination",
|
|
"propagation_mode",
|
|
}
|
|
if err := checkHCLKeys(item.Val, valid); err != nil {
|
|
return err
|
|
}
|
|
|
|
var m map[string]interface{}
|
|
if err := hcl.DecodeObject(&m, item.Val); err != nil {
|
|
return err
|
|
}
|
|
|
|
var result api.VolumeMount
|
|
dec, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
|
|
WeaklyTypedInput: true,
|
|
Result: &result,
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if err := dec.Decode(m); err != nil {
|
|
return err
|
|
}
|
|
|
|
mounts[i] = &result
|
|
}
|
|
|
|
*out = mounts
|
|
return nil
|
|
}
|