285 lines
6.3 KiB
Go
285 lines
6.3 KiB
Go
package command
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"io"
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"os"
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"strings"
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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"
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"github.com/mitchellh/mapstructure"
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"github.com/posener/complete"
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)
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type QuotaApplyCommand struct {
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Meta
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}
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func (c *QuotaApplyCommand) Help() string {
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helpText := `
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Usage: nomad quota apply [options] <input>
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Apply is used to create or update a quota specification. The specification file
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will be read from stdin by specifying "-", otherwise a path to the file is
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expected.
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If ACLs are enabled, this command requires a token with the 'quota:write'
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capability.
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General Options:
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` + generalOptionsUsage(usageOptsDefault) + `
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Apply Options:
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-json
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Parse the input as a JSON quota specification.
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`
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return strings.TrimSpace(helpText)
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}
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func (c *QuotaApplyCommand) AutocompleteFlags() complete.Flags {
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return mergeAutocompleteFlags(c.Meta.AutocompleteFlags(FlagSetClient),
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complete.Flags{
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"-json": complete.PredictNothing,
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})
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}
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func (c *QuotaApplyCommand) AutocompleteArgs() complete.Predictor {
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return complete.PredictFiles("*")
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}
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func (c *QuotaApplyCommand) Synopsis() string {
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return "Create or update a quota specification"
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}
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func (c *QuotaApplyCommand) Name() string { return "quota apply" }
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func (c *QuotaApplyCommand) Run(args []string) int {
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var jsonInput bool
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flags := c.Meta.FlagSet(c.Name(), FlagSetClient)
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flags.Usage = func() { c.Ui.Output(c.Help()) }
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flags.BoolVar(&jsonInput, "json", false, "")
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if err := flags.Parse(args); err != nil {
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return 1
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}
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// Check that we get exactly one argument
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args = flags.Args()
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if l := len(args); l != 1 {
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c.Ui.Error("This command takes one argument: <input>")
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c.Ui.Error(commandErrorText(c))
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return 1
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}
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// Read the file contents
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file := args[0]
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var rawQuota []byte
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var err error
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if file == "-" {
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rawQuota, err = io.ReadAll(os.Stdin)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Failed to read stdin: %v", err))
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return 1
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}
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} else {
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rawQuota, err = os.ReadFile(file)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Failed to read file: %v", err))
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return 1
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}
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}
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var spec *api.QuotaSpec
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if jsonInput {
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var jsonSpec api.QuotaSpec
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dec := json.NewDecoder(bytes.NewBuffer(rawQuota))
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if err := dec.Decode(&jsonSpec); err != nil {
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c.Ui.Error(fmt.Sprintf("Failed to parse quota: %v", err))
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return 1
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}
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spec = &jsonSpec
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} else {
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hclSpec, err := parseQuotaSpec(rawQuota)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error parsing quota specification: %s", err))
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return 1
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}
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spec = hclSpec
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}
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// Get the HTTP client
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client, err := c.Meta.Client()
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error initializing client: %s", err))
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return 1
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}
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_, err = client.Quotas().Register(spec, nil)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error applying quota specification: %s", err))
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return 1
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}
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c.Ui.Output(fmt.Sprintf("Successfully applied quota specification %q!", spec.Name))
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return 0
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}
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// parseQuotaSpec is used to parse the quota specification from HCL
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func parseQuotaSpec(input []byte) (*api.QuotaSpec, error) {
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root, err := hcl.ParseBytes(input)
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if err != nil {
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return nil, err
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}
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// Top-level item should be a list
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list, ok := root.Node.(*ast.ObjectList)
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if !ok {
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return nil, fmt.Errorf("error parsing: root should be an object")
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}
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var spec api.QuotaSpec
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if err := parseQuotaSpecImpl(&spec, list); err != nil {
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return nil, err
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}
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return &spec, nil
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}
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// parseQuotaSpecImpl parses the quota spec taking as input the AST tree
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func parseQuotaSpecImpl(result *api.QuotaSpec, list *ast.ObjectList) error {
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// Check for invalid keys
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valid := []string{
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"name",
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"description",
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"limit",
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}
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if err := helper.CheckHCLKeys(list, valid); err != nil {
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return err
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}
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// Decode the full thing into a map[string]interface for ease
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var m map[string]interface{}
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if err := hcl.DecodeObject(&m, list); err != nil {
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return err
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}
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// Manually parse
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delete(m, "limit")
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// Decode the rest
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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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// Parse limits
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if o := list.Filter("limit"); len(o.Items) > 0 {
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if err := parseQuotaLimits(&result.Limits, o); err != nil {
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return multierror.Prefix(err, "limit ->")
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}
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}
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return nil
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}
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// parseQuotaLimits parses the quota limits
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func parseQuotaLimits(result *[]*api.QuotaLimit, 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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"region",
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"region_limit",
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"variables_limit",
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}
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if err := helper.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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// Manually parse
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delete(m, "region_limit")
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// Decode the rest
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var limit api.QuotaLimit
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if err := mapstructure.WeakDecode(m, &limit); err != nil {
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return err
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}
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// We need this 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("limit should be an object")
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}
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// Parse limits
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if o := listVal.Filter("region_limit"); len(o.Items) > 0 {
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limit.RegionLimit = new(api.Resources)
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if err := parseQuotaResource(limit.RegionLimit, o); err != nil {
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return multierror.Prefix(err, "region_limit ->")
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}
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}
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*result = append(*result, &limit)
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}
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return nil
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}
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// parseQuotaResource parses the region_limit resources
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func parseQuotaResource(result *api.Resources, list *ast.ObjectList) error {
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list = list.Elem()
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if len(list.Items) == 0 {
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return nil
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}
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if len(list.Items) > 1 {
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return fmt.Errorf("only one 'region_limit' block allowed per limit")
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}
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// Get our resource object
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o := list.Items[0]
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// We need this 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("resource: 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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"cpu",
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"memory",
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"memory_max",
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}
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if err := helper.CheckHCLKeys(listVal, valid); err != nil {
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return multierror.Prefix(err, "resources ->")
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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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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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