152 lines
3.8 KiB
Go
152 lines
3.8 KiB
Go
package command
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import (
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"fmt"
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"sort"
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"strings"
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"github.com/hashicorp/nomad/api"
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"github.com/mitchellh/cli"
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"github.com/posener/complete"
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)
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// Ensure ScalingPolicyListCommand satisfies the cli.Command interface.
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var _ cli.Command = &ScalingPolicyListCommand{}
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// ScalingPolicyListCommand implements cli.Command.
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type ScalingPolicyListCommand struct {
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Meta
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}
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// Help satisfies the cli.Command Help function.
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func (s *ScalingPolicyListCommand) Help() string {
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helpText := `
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Usage: nomad scaling policy list [options]
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List is used to list the currently configured scaling policies.
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General Options:
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` + generalOptionsUsage() + `
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Policy Info Options:
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-json
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Output the scaling policy in its JSON format.
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-t
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Format and display the scaling policy using a Go template.
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`
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return strings.TrimSpace(helpText)
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}
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// Synopsis satisfies the cli.Command Synopsis function.
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func (s *ScalingPolicyListCommand) Synopsis() string {
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return "Display all Nomad scaling policies"
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}
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func (s *ScalingPolicyListCommand) AutocompleteFlags() complete.Flags {
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return mergeAutocompleteFlags(s.Meta.AutocompleteFlags(FlagSetClient),
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complete.Flags{
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"-json": complete.PredictNothing,
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"-t": complete.PredictAnything,
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})
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}
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// Name returns the name of this command.
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func (s *ScalingPolicyListCommand) Name() string { return "scaling policy list" }
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// Run satisfies the cli.Command Run function.
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func (s *ScalingPolicyListCommand) Run(args []string) int {
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var json bool
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var tmpl string
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flags := s.Meta.FlagSet(s.Name(), FlagSetClient)
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flags.Usage = func() { s.Ui.Output(s.Help()) }
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flags.BoolVar(&json, "json", false, "")
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flags.StringVar(&tmpl, "t", "", "")
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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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if args = flags.Args(); len(args) > 0 {
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s.Ui.Error("This command takes no arguments")
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s.Ui.Error(commandErrorText(s))
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}
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// Get the HTTP client.
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client, err := s.Meta.Client()
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if err != nil {
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s.Ui.Error(fmt.Sprintf("Error initializing client: %s", err))
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return 1
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}
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policies, _, err := client.Scaling().ListPolicies(nil)
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if err != nil {
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s.Ui.Error(fmt.Sprintf("Error listing scaling policies: %s", err))
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return 1
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}
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if len(policies) == 0 {
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s.Ui.Output("No policies found")
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return 0
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}
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if json || len(tmpl) > 0 {
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out, err := Format(json, tmpl, policies)
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if err != nil {
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s.Ui.Error(err.Error())
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return 1
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}
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s.Ui.Output(out)
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return 0
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}
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// Create the output table header.
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output := []string{"ID|Enabled|Target"}
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// Sort the list of policies based on their target.
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sortedPolicies := scalingPolicyStubList{policies: policies}
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sort.Sort(sortedPolicies)
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// Iterate the policies and add to the output.
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for _, policy := range sortedPolicies.policies {
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output = append(output, fmt.Sprintf(
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"%s|%v|%s",
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policy.ID, policy.Enabled, formatScalingPolicyTarget(policy.Target)))
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}
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// Output.
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s.Ui.Output(formatList(output))
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return 0
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}
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// scalingPolicyStubList is a wrapper around []*api.ScalingPolicyListStub that
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// list us sort the policies alphabetically based on their target.
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type scalingPolicyStubList struct {
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policies []*api.ScalingPolicyListStub
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}
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// Len satisfies the Len function of the sort.Interface interface.
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func (s scalingPolicyStubList) Len() int { return len(s.policies) }
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// Swap satisfies the Swap function of the sort.Interface interface.
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func (s scalingPolicyStubList) Swap(i, j int) {
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s.policies[i], s.policies[j] = s.policies[j], s.policies[i]
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}
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// Less satisfies the Less function of the sort.Interface interface.
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func (s scalingPolicyStubList) Less(i, j int) bool {
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iTarget := formatScalingPolicyTarget(s.policies[i].Target)
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jTarget := formatScalingPolicyTarget(s.policies[j].Target)
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stringList := []string{iTarget, jTarget}
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sort.Strings(stringList)
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if stringList[0] == iTarget {
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return true
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}
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return false
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}
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