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job.go
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job.go
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package e2eutil
import (
"fmt"
"io"
"io/ioutil"
"os/exec"
"regexp"
"strings"
)
// Register registers a jobspec from a file but with a unique ID.
// The caller is responsible for recording that ID for later cleanup.
func Register(jobID, jobFilePath string) error {
cmd := exec.Command("nomad", "job", "run", "-detach", "-")
stdin, err := cmd.StdinPipe()
if err != nil {
return fmt.Errorf("could not open stdin?: %w", err)
}
content, err := ioutil.ReadFile(jobFilePath)
if err != nil {
return fmt.Errorf("could not open job file: %w", err)
}
// hack off the first line to replace with our unique ID
var re = regexp.MustCompile(`(?m)^job ".*" \{`)
jobspec := re.ReplaceAllString(string(content),
fmt.Sprintf("job \"%s\" {", jobID))
go func() {
defer stdin.Close()
io.WriteString(stdin, jobspec)
}()
out, err := cmd.CombinedOutput()
if err != nil {
return fmt.Errorf("could not register job: %w\n%v", err, string(out))
}
return nil
}
// PeriodicForce forces a periodic job to dispatch
func PeriodicForce(jobID string) error {
// nomad job periodic force
cmd := exec.Command("nomad", "job", "periodic", "force", jobID)
out, err := cmd.CombinedOutput()
if err != nil {
return fmt.Errorf("could not register job: %w\n%v", err, string(out))
}
return nil
}
// Dispatch dispatches a parameterized job
func Dispatch(jobID string, meta map[string]string, payload string) error {
// nomad job periodic force
args := []string{"job", "dispatch"}
for k, v := range meta {
args = append(args, "-meta", fmt.Sprintf("%v=%v", k, v))
}
args = append(args, jobID)
if payload != "" {
args = append(args, "-")
}
cmd := exec.Command("nomad", args...)
cmd.Stdin = strings.NewReader(payload)
out, err := cmd.CombinedOutput()
if err != nil {
return fmt.Errorf("could not dispatch job: %w\n%v", err, string(out))
}
return nil
}
// JobInspectTemplate runs nomad job inspect and formats the output
// using the specified go template
func JobInspectTemplate(jobID, template string) (string, error) {
cmd := exec.Command("nomad", "job", "inspect", "-t", template, jobID)
out, err := cmd.CombinedOutput()
if err != nil {
return "", fmt.Errorf("could not inspect job: %w\n%v", err, string(out))
}
outStr := string(out)
outStr = strings.TrimSuffix(outStr, "\n")
return outStr, nil
}
// Register registers a jobspec from a string, also with a unique ID.
// The caller is responsible for recording that ID for later cleanup.
func RegisterFromJobspec(jobID, jobspec string) error {
cmd := exec.Command("nomad", "job", "run", "-detach", "-")
stdin, err := cmd.StdinPipe()
if err != nil {
return fmt.Errorf("could not open stdin?: %w", err)
}
// hack off the first line to replace with our unique ID
var re = regexp.MustCompile(`^job "\w+" \{`)
jobspec = re.ReplaceAllString(jobspec,
fmt.Sprintf("job \"%s\" {", jobID))
go func() {
defer stdin.Close()
io.WriteString(stdin, jobspec)
}()
out, err := cmd.CombinedOutput()
if err != nil {
return fmt.Errorf("could not register job: %w\n%v", err, string(out))
}
return nil
}
func ChildrenJobSummary(jobID string) ([]map[string]string, error) {
out, err := Command("nomad", "job", "status", jobID)
if err != nil {
return nil, fmt.Errorf("nomad job status failed: %w", err)
}
section, err := GetSection(out, "Children Job Summary")
if err != nil {
section, err = GetSection(out, "Parameterized Job Summary")
if err != nil {
return nil, fmt.Errorf("could not find children job summary section: %w", err)
}
}
summary, err := ParseColumns(section)
if err != nil {
return nil, fmt.Errorf("could not parse children job summary section: %w", err)
}
return summary, nil
}
func PreviouslyLaunched(jobID string) ([]map[string]string, error) {
out, err := Command("nomad", "job", "status", jobID)
if err != nil {
return nil, fmt.Errorf("nomad job status failed: %w", err)
}
section, err := GetSection(out, "Previously Launched Jobs")
if err != nil {
return nil, fmt.Errorf("could not find previously launched jobs section: %w", err)
}
summary, err := ParseColumns(section)
if err != nil {
return nil, fmt.Errorf("could not parse previously launched jobs section: %w", err)
}
return summary, nil
}
func DispatchedJobs(jobID string) ([]map[string]string, error) {
out, err := Command("nomad", "job", "status", jobID)
if err != nil {
return nil, fmt.Errorf("nomad job status failed: %w", err)
}
section, err := GetSection(out, "Dispatched Jobs")
if err != nil {
return nil, fmt.Errorf("could not find previously launched jobs section: %w", err)
}
summary, err := ParseColumns(section)
if err != nil {
return nil, fmt.Errorf("could not parse previously launched jobs section: %w", err)
}
return summary, nil
}