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alloc_stop.go
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alloc_stop.go
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package command
import (
"fmt"
"strings"
"github.com/hashicorp/nomad/api"
)
type AllocStopCommand struct {
Meta
}
func (a *AllocStopCommand) Help() string {
helpText := `
Usage: nomad alloc stop [options] <allocation>
Alias: nomad stop
stop an existing allocation. This command is used to signal a specific alloc
to shut down. When the allocation has been shut down, it will then be
rescheduled. An interactive monitoring session will display log lines as the
allocation completes shutting down. It is safe to exit the monitor early with
ctrl-c.
General Options:
` + generalOptionsUsage() + `
Stop Specific Options:
-detach
Return immediately instead of entering monitor mode. After the
stop command is submitted, a new evaluation ID is printed to the
screen, which can be used to examine the rescheduling evaluation using the
eval-status command.
-verbose
Show full information.
`
return strings.TrimSpace(helpText)
}
func (c *AllocStopCommand) Name() string { return "alloc stop" }
func (c *AllocStopCommand) Run(args []string) int {
var detach, verbose bool
flags := c.Meta.FlagSet(c.Name(), FlagSetClient)
flags.Usage = func() { c.Ui.Output(c.Help()) }
flags.BoolVar(&detach, "detach", false, "")
flags.BoolVar(&verbose, "verbose", false, "")
if err := flags.Parse(args); err != nil {
return 1
}
// Check that we got exactly one alloc
args = flags.Args()
if len(args) != 1 {
c.Ui.Error("This command takes one argument: <alloc-id>")
c.Ui.Error(commandErrorText(c))
return 1
}
allocID := args[0]
// Truncate the id unless full length is requested
length := shortId
if verbose {
length = fullId
}
// Query the allocation info
if len(allocID) == 1 {
c.Ui.Error(fmt.Sprintf("Alloc ID must contain at least two characters."))
return 1
}
allocID = sanitizeUUIDPrefix(allocID)
// Get the HTTP client
client, err := c.Meta.Client()
if err != nil {
c.Ui.Error(fmt.Sprintf("Error initializing client: %s", err))
return 1
}
allocs, _, err := client.Allocations().PrefixList(allocID)
if err != nil {
c.Ui.Error(fmt.Sprintf("Error querying allocation: %v", err))
return 1
}
if len(allocs) == 0 {
c.Ui.Error(fmt.Sprintf("No allocation(s) with prefix or id %q found", allocID))
return 1
}
if len(allocs) > 1 {
// Format the allocs
out := formatAllocListStubs(allocs, verbose, length)
c.Ui.Error(fmt.Sprintf("Prefix matched multiple allocations\n\n%s", out))
return 1
}
// Prefix lookup matched a single allocation
q := &api.QueryOptions{Namespace: allocs[0].Namespace}
alloc, _, err := client.Allocations().Info(allocs[0].ID, q)
if err != nil {
c.Ui.Error(fmt.Sprintf("Error querying allocation: %s", err))
return 1
}
resp, err := client.Allocations().Stop(alloc, nil)
if err != nil {
c.Ui.Error(fmt.Sprintf("Error stopping allocation: %s", err))
return 1
}
if detach {
c.Ui.Output(resp.EvalID)
return 0
}
mon := newMonitor(c.Ui, client, length)
return mon.monitor(resp.EvalID, false)
}
func (a *AllocStopCommand) Synopsis() string {
return "Stop and reschedule a running allocation"
}