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job_revert.go
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job_revert.go
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package command
import (
"fmt"
"os"
"strings"
"github.com/hashicorp/nomad/api"
"github.com/hashicorp/nomad/api/contexts"
"github.com/posener/complete"
)
type JobRevertCommand struct {
Meta
}
func (c *JobRevertCommand) Help() string {
helpText := `
Usage: nomad job revert [options] <job> <version>
Revert is used to revert a job to a prior version of the job. The available
versions to revert to can be found using "nomad job history" command.
When ACLs are enabled, this command requires a token with the 'submit-job'
and 'list-jobs' capabilities for the job's namespace.
General Options:
` + generalOptionsUsage(usageOptsDefault) + `
Revert Options:
-detach
Return immediately instead of entering monitor mode. After job revert,
the evaluation ID will be printed to the screen, which can be used to
examine the evaluation using the eval-status command.
-consul-token
The Consul token used to verify that the caller has access to the Service
Identity policies associated in the targeted version of the job.
-vault-token
The Vault token used to verify that the caller has access to the Vault
policies in the targeted version of the job.
-verbose
Display full information.
`
return strings.TrimSpace(helpText)
}
func (c *JobRevertCommand) Synopsis() string {
return "Revert to a prior version of the job"
}
func (c *JobRevertCommand) AutocompleteFlags() complete.Flags {
return mergeAutocompleteFlags(c.Meta.AutocompleteFlags(FlagSetClient),
complete.Flags{
"-detach": complete.PredictNothing,
"-verbose": complete.PredictNothing,
})
}
func (c *JobRevertCommand) AutocompleteArgs() complete.Predictor {
return complete.PredictFunc(func(a complete.Args) []string {
client, err := c.Meta.Client()
if err != nil {
return nil
}
resp, _, err := client.Search().PrefixSearch(a.Last, contexts.Jobs, nil)
if err != nil {
return []string{}
}
return resp.Matches[contexts.Jobs]
})
}
func (c *JobRevertCommand) Name() string { return "job revert" }
func (c *JobRevertCommand) Run(args []string) int {
var detach, verbose bool
var consulToken, vaultToken string
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, "")
flags.StringVar(&consulToken, "consul-token", "", "")
flags.StringVar(&vaultToken, "vault-token", "", "")
if err := flags.Parse(args); err != nil {
return 1
}
// Truncate the id unless full length is requested
length := shortId
if verbose {
length = fullId
}
// Check that we got two args
args = flags.Args()
if l := len(args); l != 2 {
c.Ui.Error("This command takes two arguments: <job> <version>")
c.Ui.Error(commandErrorText(c))
return 1
}
// Get the HTTP client
client, err := c.Meta.Client()
if err != nil {
c.Ui.Error(fmt.Sprintf("Error initializing client: %s", err))
return 1
}
// Parse the Consul token
if consulToken == "" {
// Check the environment variable
consulToken = os.Getenv("CONSUL_HTTP_TOKEN")
}
// Parse the Vault token
if vaultToken == "" {
// Check the environment variable
vaultToken = os.Getenv("VAULT_TOKEN")
}
jobID := strings.TrimSpace(args[0])
revertVersion, ok, err := parseVersion(args[1])
if !ok {
c.Ui.Error("The job version to revert to must be specified using the -job-version flag")
return 1
}
if err != nil {
c.Ui.Error(fmt.Sprintf("Failed to parse job-version flag: %v", err))
return 1
}
// Check if the job exists
jobs, _, err := client.Jobs().PrefixList(jobID)
if err != nil {
c.Ui.Error(fmt.Sprintf("Error listing jobs: %s", err))
return 1
}
if len(jobs) == 0 {
c.Ui.Error(fmt.Sprintf("No job(s) with prefix or id %q found", jobID))
return 1
}
if len(jobs) > 1 {
if (jobID != jobs[0].ID) || (c.allNamespaces() && jobs[0].ID == jobs[1].ID) {
c.Ui.Error(fmt.Sprintf("Prefix matched multiple jobs\n\n%s", createStatusListOutput(jobs, c.allNamespaces())))
return 1
}
}
// Prefix lookup matched a single job
q := &api.WriteOptions{Namespace: jobs[0].JobSummary.Namespace}
resp, _, err := client.Jobs().Revert(jobs[0].ID, revertVersion, nil, q, consulToken, vaultToken)
if err != nil {
c.Ui.Error(fmt.Sprintf("Error retrieving job versions: %s", err))
return 1
}
// Nothing to do
evalCreated := resp.EvalID != ""
if !evalCreated {
return 0
}
if detach {
c.Ui.Output("Evaluation ID: " + resp.EvalID)
return 0
}
mon := newMonitor(c.Ui, client, length)
return mon.monitor(resp.EvalID)
}