open-nomad/command/node_pool_info.go

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2023-06-02 19:49:57 +00:00
// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: MPL-2.0
package command
import (
"fmt"
"sort"
"strings"
"github.com/posener/complete"
)
type NodePoolInfoCommand struct {
Meta
}
func (c *NodePoolInfoCommand) Name() string {
return "node pool info"
}
func (c *NodePoolInfoCommand) Synopsis() string {
return "Fetch information about an existing node pool"
}
func (c *NodePoolInfoCommand) Help() string {
helpText := `
Usage: nomad node pool info <node-pool>
Info is used to fetch information about an existing node pool.
If ACLs are enabled, this command requires a token with the 'read'
capability in a 'node_pool' policy that matches the node pool being targeted.
General Options:
` + generalOptionsUsage(usageOptsDefault) + `
Info Options:
-json
Output the node pool in its JSON format.
-t
Format and display node pool using a Go template.
`
return strings.TrimSpace(helpText)
}
func (c *NodePoolInfoCommand) AutocompleteFlags() complete.Flags {
return mergeAutocompleteFlags(c.Meta.AutocompleteFlags(FlagSetClient),
complete.Flags{
"-json": complete.PredictNothing,
"-t": complete.PredictAnything,
})
}
func (c *NodePoolInfoCommand) AutocompleteArgs() complete.Predictor {
return nodePoolPredictor(c.Client, nil)
}
func (c *NodePoolInfoCommand) Run(args []string) int {
var json bool
var tmpl string
flags := c.Meta.FlagSet(c.Name(), FlagSetClient)
flags.Usage = func() { c.Ui.Output(c.Help()) }
flags.BoolVar(&json, "json", false, "")
flags.StringVar(&tmpl, "t", "", "")
if err := flags.Parse(args); err != nil {
return 1
}
// Check that we only have one argument.
args = flags.Args()
if len(args) != 1 {
c.Ui.Error("This command takes one argument: <node-pool>")
c.Ui.Error(commandErrorText(c))
return 1
}
// Lookup node pool by prefix.
client, err := c.Meta.Client()
if err != nil {
c.Ui.Error(fmt.Sprintf("Error initializing client: %s", err))
return 1
}
pool, possible, err := nodePoolByPrefix(client, args[0])
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if err != nil {
c.Ui.Error(fmt.Sprintf("Error retrieving node pool: %s", err))
return 1
}
if len(possible) != 0 {
c.Ui.Error(fmt.Sprintf("Prefix matched multiple node pools\n\n%s", formatNodePoolList(possible)))
return 1
}
// Format output if requested.
if json || tmpl != "" {
out, err := Format(json, tmpl, pool)
if err != nil {
c.Ui.Error(err.Error())
return 1
}
c.Ui.Output(out)
return 0
}
// Print node pool information.
basic := []string{
fmt.Sprintf("Name|%s", pool.Name),
fmt.Sprintf("Description|%s", pool.Description),
}
c.Ui.Output(formatKV(basic))
c.Ui.Output(c.Colorize().Color("\n[bold]Metadata[reset]"))
if len(pool.Meta) > 0 {
var meta []string
for k, v := range pool.Meta {
meta = append(meta, fmt.Sprintf("%s|%s", k, v))
}
sort.Strings(meta)
c.Ui.Output(formatKV(meta))
} else {
c.Ui.Output("No metadata")
}
c.Ui.Output(c.Colorize().Color("\n[bold]Scheduler Configuration[reset]"))
if pool.SchedulerConfiguration != nil {
schedConfig := []string{
fmt.Sprintf("Scheduler Algorithm|%s", pool.SchedulerConfiguration.SchedulerAlgorithm),
}
c.Ui.Output(formatKV(schedConfig))
} else {
c.Ui.Output("No scheduler configuration")
}
return 0
}