forked from hashicorp/nomad
/
parse_group.go
447 lines (388 loc) · 10.5 KB
/
parse_group.go
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// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: MPL-2.0
package jobspec
import (
"fmt"
multierror "github.com/hashicorp/go-multierror"
"github.com/hashicorp/hcl"
"github.com/hashicorp/hcl/hcl/ast"
"github.com/hernad/nomad/api"
"github.com/mitchellh/mapstructure"
)
func parseGroups(result *api.Job, list *ast.ObjectList) error {
list = list.Children()
if len(list.Items) == 0 {
return nil
}
// Go through each object and turn it into an actual result.
collection := make([]*api.TaskGroup, 0, len(list.Items))
seen := make(map[string]struct{})
for _, item := range list.Items {
n := item.Keys[0].Token.Value().(string)
// Make sure we haven't already found this
if _, ok := seen[n]; ok {
return fmt.Errorf("group '%s' defined more than once", n)
}
seen[n] = struct{}{}
// We need this later
var listVal *ast.ObjectList
if ot, ok := item.Val.(*ast.ObjectType); ok {
listVal = ot.List
} else {
return fmt.Errorf("group '%s': should be an object", n)
}
// Check for invalid keys
valid := []string{
"count",
"constraint",
"consul",
"affinity",
"restart",
"meta",
"task",
"ephemeral_disk",
"update",
"reschedule",
"vault",
"migrate",
"spread",
"shutdown_delay",
"network",
"service",
"volume",
"scaling",
"stop_after_client_disconnect",
"max_client_disconnect",
}
if err := checkHCLKeys(listVal, valid); err != nil {
return multierror.Prefix(err, fmt.Sprintf("'%s' ->", n))
}
var m map[string]interface{}
if err := hcl.DecodeObject(&m, item.Val); err != nil {
return err
}
delete(m, "constraint")
delete(m, "consul")
delete(m, "affinity")
delete(m, "meta")
delete(m, "task")
delete(m, "restart")
delete(m, "ephemeral_disk")
delete(m, "update")
delete(m, "vault")
delete(m, "migrate")
delete(m, "spread")
delete(m, "network")
delete(m, "service")
delete(m, "volume")
delete(m, "scaling")
// Build the group with the basic decode
var g api.TaskGroup
g.Name = stringToPtr(n)
dec, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
DecodeHook: mapstructure.StringToTimeDurationHookFunc(),
WeaklyTypedInput: true,
Result: &g,
})
if err != nil {
return err
}
if err := dec.Decode(m); err != nil {
return err
}
// Parse constraints
if o := listVal.Filter("constraint"); len(o.Items) > 0 {
if err := parseConstraints(&g.Constraints, o); err != nil {
return multierror.Prefix(err, fmt.Sprintf("'%s', constraint ->", n))
}
}
// Parse consul
if o := listVal.Filter("consul"); len(o.Items) > 0 {
if err := parseConsul(&g.Consul, o); err != nil {
return multierror.Prefix(err, fmt.Sprintf("'%s', consul ->", n))
}
}
// Parse affinities
if o := listVal.Filter("affinity"); len(o.Items) > 0 {
if err := parseAffinities(&g.Affinities, o); err != nil {
return multierror.Prefix(err, fmt.Sprintf("'%s', affinity ->", n))
}
}
// Parse restart policy
if o := listVal.Filter("restart"); len(o.Items) > 0 {
if err := parseRestartPolicy(&g.RestartPolicy, o); err != nil {
return multierror.Prefix(err, fmt.Sprintf("'%s', restart ->", n))
}
}
// Parse spread
if o := listVal.Filter("spread"); len(o.Items) > 0 {
if err := parseSpread(&g.Spreads, o); err != nil {
return multierror.Prefix(err, "spread ->")
}
}
// Parse network
if o := listVal.Filter("network"); len(o.Items) > 0 {
networks, err := ParseNetwork(o)
if err != nil {
return err
}
g.Networks = []*api.NetworkResource{networks}
}
// Parse reschedule policy
if o := listVal.Filter("reschedule"); len(o.Items) > 0 {
if err := parseReschedulePolicy(&g.ReschedulePolicy, o); err != nil {
return multierror.Prefix(err, fmt.Sprintf("'%s', reschedule ->", n))
}
}
// Parse ephemeral disk
if o := listVal.Filter("ephemeral_disk"); len(o.Items) > 0 {
g.EphemeralDisk = &api.EphemeralDisk{}
if err := parseEphemeralDisk(&g.EphemeralDisk, o); err != nil {
return multierror.Prefix(err, fmt.Sprintf("'%s', ephemeral_disk ->", n))
}
}
// If we have an update strategy, then parse that
if o := listVal.Filter("update"); len(o.Items) > 0 {
if err := parseUpdate(&g.Update, o); err != nil {
return multierror.Prefix(err, "update ->")
}
}
// If we have a migration strategy, then parse that
if o := listVal.Filter("migrate"); len(o.Items) > 0 {
if err := parseMigrate(&g.Migrate, o); err != nil {
return multierror.Prefix(err, "migrate ->")
}
}
// Parse out meta fields. These are in HCL as a list so we need
// to iterate over them and merge them.
if metaO := listVal.Filter("meta"); len(metaO.Items) > 0 {
for _, o := range metaO.Elem().Items {
var m map[string]interface{}
if err := hcl.DecodeObject(&m, o.Val); err != nil {
return err
}
if err := mapstructure.WeakDecode(m, &g.Meta); err != nil {
return err
}
}
}
// Parse any volume declarations
if o := listVal.Filter("volume"); len(o.Items) > 0 {
if err := parseVolumes(&g.Volumes, o); err != nil {
return multierror.Prefix(err, "volume ->")
}
}
// Parse scaling policy
if o := listVal.Filter("scaling"); len(o.Items) > 0 {
if err := parseGroupScalingPolicy(&g.Scaling, o); err != nil {
return multierror.Prefix(err, "scaling ->")
}
}
// Parse tasks
if o := listVal.Filter("task"); len(o.Items) > 0 {
if err := parseTasks(&g.Tasks, o); err != nil {
return multierror.Prefix(err, fmt.Sprintf("'%s', task:", n))
}
}
// If we have a vault block, then parse that
if o := listVal.Filter("vault"); len(o.Items) > 0 {
tgVault := &api.Vault{
Env: boolToPtr(true),
DisableFile: boolToPtr(false),
ChangeMode: stringToPtr("restart"),
}
if err := parseVault(tgVault, o); err != nil {
return multierror.Prefix(err, fmt.Sprintf("'%s', vault ->", n))
}
// Go through the tasks and if they don't have a Vault block, set it
for _, task := range g.Tasks {
if task.Vault == nil {
task.Vault = tgVault
}
}
}
if o := listVal.Filter("service"); len(o.Items) > 0 {
if err := parseGroupServices(&g, o); err != nil {
return multierror.Prefix(err, fmt.Sprintf("'%s',", n))
}
}
collection = append(collection, &g)
}
result.TaskGroups = append(result.TaskGroups, collection...)
return nil
}
func parseConsul(result **api.Consul, list *ast.ObjectList) error {
list = list.Elem()
if len(list.Items) > 1 {
return fmt.Errorf("only one 'consul' block allowed")
}
// Get our consul object
obj := list.Items[0]
// Check for invalid keys
valid := []string{
"namespace",
}
if err := checkHCLKeys(obj.Val, valid); err != nil {
return err
}
var m map[string]interface{}
if err := hcl.DecodeObject(&m, obj.Val); err != nil {
return err
}
var consul api.Consul
if err := mapstructure.WeakDecode(m, &consul); err != nil {
return err
}
*result = &consul
return nil
}
func parseEphemeralDisk(result **api.EphemeralDisk, list *ast.ObjectList) error {
list = list.Elem()
if len(list.Items) > 1 {
return fmt.Errorf("only one 'ephemeral_disk' block allowed")
}
// Get our ephemeral_disk object
obj := list.Items[0]
// Check for invalid keys
valid := []string{
"sticky",
"size",
"migrate",
}
if err := checkHCLKeys(obj.Val, valid); err != nil {
return err
}
var m map[string]interface{}
if err := hcl.DecodeObject(&m, obj.Val); err != nil {
return err
}
var ephemeralDisk api.EphemeralDisk
if err := mapstructure.WeakDecode(m, &ephemeralDisk); err != nil {
return err
}
*result = &ephemeralDisk
return nil
}
func parseRestartPolicy(final **api.RestartPolicy, list *ast.ObjectList) error {
list = list.Elem()
if len(list.Items) > 1 {
return fmt.Errorf("only one 'restart' block allowed")
}
// Get our job object
obj := list.Items[0]
// Check for invalid keys
valid := []string{
"attempts",
"interval",
"delay",
"mode",
}
if err := checkHCLKeys(obj.Val, valid); err != nil {
return err
}
var m map[string]interface{}
if err := hcl.DecodeObject(&m, obj.Val); err != nil {
return err
}
var result api.RestartPolicy
dec, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
DecodeHook: mapstructure.StringToTimeDurationHookFunc(),
WeaklyTypedInput: true,
Result: &result,
})
if err != nil {
return err
}
if err := dec.Decode(m); err != nil {
return err
}
*final = &result
return nil
}
func parseVolumes(out *map[string]*api.VolumeRequest, list *ast.ObjectList) error {
hcl.DecodeObject(out, list)
for k, v := range *out {
err := unusedKeys(v)
if err != nil {
return err
}
// This is supported by `hcl:",key"`, but that only works if we start at the
// parent ast.ObjectItem
v.Name = k
}
return nil
}
func parseGroupScalingPolicy(out **api.ScalingPolicy, list *ast.ObjectList) error {
if len(list.Items) > 1 {
return fmt.Errorf("only one 'scaling' block allowed")
}
item := list.Items[0]
if len(item.Keys) != 0 {
return fmt.Errorf("task group scaling policy should not have a name")
}
p, err := parseScalingPolicy(item)
if err != nil {
return err
}
// group-specific validation
if p.Max == nil {
return fmt.Errorf("missing 'max'")
}
if p.Type == "" {
p.Type = "horizontal"
} else if p.Type != "horizontal" {
return fmt.Errorf("task group scaling policy had invalid type: %q", p.Type)
}
*out = p
return nil
}
func parseScalingPolicy(item *ast.ObjectItem) (*api.ScalingPolicy, error) {
// We need this later
var listVal *ast.ObjectList
if ot, ok := item.Val.(*ast.ObjectType); ok {
listVal = ot.List
} else {
return nil, fmt.Errorf("should be an object")
}
valid := []string{
"min",
"max",
"policy",
"enabled",
"type",
}
if err := checkHCLKeys(item.Val, valid); err != nil {
return nil, err
}
var m map[string]interface{}
if err := hcl.DecodeObject(&m, item.Val); err != nil {
return nil, err
}
delete(m, "policy")
var result api.ScalingPolicy
dec, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
WeaklyTypedInput: true,
Result: &result,
})
if err != nil {
return nil, err
}
if err := dec.Decode(m); err != nil {
return nil, err
}
// If we have policy, then parse that
if o := listVal.Filter("policy"); len(o.Items) > 0 {
if len(o.Elem().Items) > 1 {
return nil, fmt.Errorf("only one 'policy' block allowed per 'scaling' block")
}
p := o.Elem().Items[0]
var m map[string]interface{}
if err := hcl.DecodeObject(&m, p.Val); err != nil {
return nil, err
}
if err := mapstructure.WeakDecode(m, &result.Policy); err != nil {
return nil, err
}
}
return &result, nil
}