403 lines
9.6 KiB
Go
403 lines
9.6 KiB
Go
package jobspec
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import (
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"fmt"
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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/mitchellh/mapstructure"
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)
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func parseGroups(result *api.Job, 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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collection := make([]*api.TaskGroup, 0, len(list.Items))
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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("group '%s' defined more than once", n)
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}
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seen[n] = struct{}{}
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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 fmt.Errorf("group '%s': should be an object", n)
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}
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// Check for invalid keys
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valid := []string{
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"count",
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"constraint",
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"affinity",
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"restart",
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"meta",
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"task",
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"ephemeral_disk",
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"update",
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"reschedule",
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"vault",
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"migrate",
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"spread",
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"shutdown_delay",
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"network",
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"service",
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"volume",
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"scaling",
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"stop_after_client_disconnect",
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}
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if err := checkHCLKeys(listVal, valid); err != nil {
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return multierror.Prefix(err, fmt.Sprintf("'%s' ->", n))
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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 err
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}
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delete(m, "constraint")
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delete(m, "affinity")
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delete(m, "meta")
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delete(m, "task")
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delete(m, "restart")
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delete(m, "ephemeral_disk")
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delete(m, "update")
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delete(m, "vault")
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delete(m, "migrate")
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delete(m, "spread")
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delete(m, "network")
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delete(m, "service")
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delete(m, "volume")
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delete(m, "scaling")
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// Build the group with the basic decode
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var g api.TaskGroup
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g.Name = stringToPtr(n)
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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: &g,
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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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// Parse constraints
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if o := listVal.Filter("constraint"); len(o.Items) > 0 {
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if err := parseConstraints(&g.Constraints, o); err != nil {
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return multierror.Prefix(err, fmt.Sprintf("'%s', constraint ->", n))
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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(&g.Affinities, o); err != nil {
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return multierror.Prefix(err, fmt.Sprintf("'%s', affinity ->", n))
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}
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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(&g.RestartPolicy, o); err != nil {
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return multierror.Prefix(err, fmt.Sprintf("'%s', restart ->", n))
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}
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}
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// Parse spread
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if o := listVal.Filter("spread"); len(o.Items) > 0 {
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if err := parseSpread(&g.Spreads, o); err != nil {
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return multierror.Prefix(err, "spread ->")
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}
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}
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// Parse network
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if o := listVal.Filter("network"); len(o.Items) > 0 {
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networks, err := ParseNetwork(o)
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if err != nil {
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return err
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}
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g.Networks = []*api.NetworkResource{networks}
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}
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// Parse reschedule policy
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if o := listVal.Filter("reschedule"); len(o.Items) > 0 {
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if err := parseReschedulePolicy(&g.ReschedulePolicy, o); err != nil {
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return multierror.Prefix(err, fmt.Sprintf("'%s', reschedule ->", n))
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}
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}
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// Parse ephemeral disk
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if o := listVal.Filter("ephemeral_disk"); len(o.Items) > 0 {
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g.EphemeralDisk = &api.EphemeralDisk{}
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if err := parseEphemeralDisk(&g.EphemeralDisk, o); err != nil {
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return multierror.Prefix(err, fmt.Sprintf("'%s', ephemeral_disk ->", n))
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}
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}
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// If we have an update strategy, then parse that
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if o := listVal.Filter("update"); len(o.Items) > 0 {
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if err := parseUpdate(&g.Update, o); err != nil {
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return multierror.Prefix(err, "update ->")
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}
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}
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// If we have a migration strategy, then parse that
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if o := listVal.Filter("migrate"); len(o.Items) > 0 {
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if err := parseMigrate(&g.Migrate, o); err != nil {
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return multierror.Prefix(err, "migrate ->")
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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 err
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}
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if err := mapstructure.WeakDecode(m, &g.Meta); err != nil {
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return err
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}
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}
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}
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// Parse any volume declarations
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if o := listVal.Filter("volume"); len(o.Items) > 0 {
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if err := parseVolumes(&g.Volumes, o); err != nil {
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return multierror.Prefix(err, "volume ->")
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}
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}
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// Parse scaling policy
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if o := listVal.Filter("scaling"); len(o.Items) > 0 {
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if err := parseGroupScalingPolicy(&g.Scaling, o); err != nil {
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return multierror.Prefix(err, "scaling ->")
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}
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}
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// Parse tasks
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if o := listVal.Filter("task"); len(o.Items) > 0 {
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if err := parseTasks(&g.Tasks, o); err != nil {
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return multierror.Prefix(err, fmt.Sprintf("'%s', task:", n))
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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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tgVault := &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(tgVault, o); err != nil {
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return multierror.Prefix(err, fmt.Sprintf("'%s', vault ->", n))
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}
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// Go through the tasks and if they don't have a Vault block, set it
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for _, task := range g.Tasks {
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if task.Vault == nil {
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task.Vault = tgVault
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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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if err := parseGroupServices(&g, o); err != nil {
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return multierror.Prefix(err, fmt.Sprintf("'%s',", n))
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}
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}
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collection = append(collection, &g)
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}
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result.TaskGroups = append(result.TaskGroups, collection...)
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return nil
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}
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func parseEphemeralDisk(result **api.EphemeralDisk, 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 'ephemeral_disk' block allowed")
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}
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// Get our ephemeral_disk object
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obj := list.Items[0]
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// Check for invalid keys
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valid := []string{
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"sticky",
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"size",
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"migrate",
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}
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if err := checkHCLKeys(obj.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, obj.Val); err != nil {
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return err
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}
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var ephemeralDisk api.EphemeralDisk
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if err := mapstructure.WeakDecode(m, &ephemeralDisk); err != nil {
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return err
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}
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*result = &ephemeralDisk
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return nil
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}
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func parseRestartPolicy(final **api.RestartPolicy, 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 'restart' block allowed")
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}
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// Get our job object
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obj := list.Items[0]
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// Check for invalid keys
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valid := []string{
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"attempts",
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"interval",
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"delay",
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"mode",
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}
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if err := checkHCLKeys(obj.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, obj.Val); err != nil {
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return err
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}
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var result api.RestartPolicy
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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: &result,
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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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*final = &result
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return nil
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}
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func parseVolumes(out *map[string]*api.VolumeRequest, list *ast.ObjectList) error {
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hcl.DecodeObject(out, list)
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for k, v := range *out {
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err := unusedKeys(v)
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if err != nil {
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return err
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}
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// This is supported by `hcl:",key"`, but that only works if we start at the
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// parent ast.ObjectItem
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v.Name = k
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}
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return nil
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}
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func parseGroupScalingPolicy(out **api.ScalingPolicy, list *ast.ObjectList) error {
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if len(list.Items) > 1 {
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return fmt.Errorf("only one 'scaling' block allowed")
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}
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item := list.Items[0]
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if len(item.Keys) != 0 {
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return fmt.Errorf("task group scaling policy should not have a name")
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}
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p, err := parseScalingPolicy(item)
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if err != nil {
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return err
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}
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// group-specific validation
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if p.Max == nil {
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return fmt.Errorf("missing 'max'")
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}
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if p.Type == "" {
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p.Type = "horizontal"
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} else if p.Type != "horizontal" {
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return fmt.Errorf("task group scaling policy had invalid type: %q", p.Type)
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}
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*out = p
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return nil
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}
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func parseScalingPolicy(item *ast.ObjectItem) (*api.ScalingPolicy, 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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valid := []string{
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"min",
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"max",
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"policy",
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"enabled",
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"type",
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}
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if err := checkHCLKeys(item.Val, valid); 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, "policy")
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var result api.ScalingPolicy
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dec, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
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WeaklyTypedInput: true,
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Result: &result,
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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 policy, then parse that
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if o := listVal.Filter("policy"); len(o.Items) > 0 {
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if len(o.Elem().Items) > 1 {
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return nil, fmt.Errorf("only one 'policy' block allowed per 'scaling' block")
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}
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p := o.Elem().Items[0]
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var m map[string]interface{}
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if err := hcl.DecodeObject(&m, p.Val); err != nil {
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return nil, err
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}
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if err := mapstructure.WeakDecode(m, &result.Policy); err != nil {
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return nil, err
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}
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}
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return &result, nil
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}
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