Fixed merged conflict

This commit is contained in:
Diptanu Choudhury 2016-02-07 17:58:31 -05:00
commit 4527410e33
23 changed files with 182 additions and 95 deletions

View File

@ -11,7 +11,7 @@ go:
- tip
env:
- TRAVIS_RUN=true DOCKER_VERSION=1.9.1
- DOCKER_VERSION=1.9.1
matrix:
allow_failures:

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@ -3,6 +3,7 @@
BACKWARDS INCOMPATIBILITIES:
* core: Improved restart policy with more user configuration [GH-594]
* core/cli: Print short identifiers [GH-675]
* core/consul: Validate service name doesn't include period [GH-770]
* core/jobspec: Variables/constraints interpreted using ${} notation [GH-675]
* client: Environment variable containing address for each allocated port
[GH-704]
@ -26,6 +27,7 @@ IMPROVEMENTS:
* core/client: Client pulls minimum set of required allocations [GH-731]
* core/jobspec: Default task resources and validation [GH-739]
* cli: Output of agent-info is sorted [GH-617]
* cli: Eval monitor detects zero wait condition [GH-776]
* cli: Ability to navigate allocation directories [GH-709]
* client: Handle updates to tasks Restart Policy and KillTimeout [GH-751]
* client: Create a tmp/ directory inside each task directory [GH-757]
@ -34,6 +36,8 @@ IMPROVEMENTS:
* drivers: Interpret Nomad variables in environment variables/args [GH-653]
* driver/rkt: Add support for CPU/Memory isolation [GH-610]
* driver/rkt: Add support for mounting alloc/task directory [GH-645]
* driver/docker: Support for .dockercfg based auth for private registries
[GH-773]
BUG FIXES:
* core: Node drain could only be partially applied [GH-750]
@ -42,6 +46,7 @@ BUG FIXES:
* client: Handle non-200 codes when parsing AWS metadata [GH-614]
* client: Cleanup of the allocation directory [GH-755]
* client: Unmounted of shared alloc dir when client is rebooted [GH-755]
* client/consul: Service name changes handled properly [GH-766]
* driver/rkt: handle broader format of rkt version outputs [GH-745]
* driver/qemu: failed to load image and kvm accelerator fixes [GH-656]

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@ -57,7 +57,7 @@ Developing Nomad
If you wish to work on Nomad itself or any of its built-in systems,
you will first need [Go](https://www.golang.org) installed on your
machine (version 1.4+ is *required*).
machine (version 1.5+ is *required*).
**Developing with Vagrant**
There is an included Vagrantfile that can help bootstrap the process. The

2
Vagrantfile vendored
View File

@ -62,6 +62,8 @@ sudo usermod -aG docker vagrant
# Setup Nomad for development
cd /opt/gopath/src/github.com/hashicorp/nomad && make updatedeps
# Install gox
go get github.com/mitchellh/gox
# CD into the nomad working directory when we login to the VM
grep "cd /opt/gopath/src/github.com/hashicorp/nomad" ~/.profile || echo "cd /opt/gopath/src/github.com/hashicorp/nomad" >> ~/.profile

View File

@ -364,8 +364,6 @@ func (r *AllocRunner) Run() {
continue
}
// Merge in the task resources
task.Resources = alloc.TaskResources[task.Name]
tr := NewTaskRunner(r.logger, r.config, r.setTaskState, r.ctx, r.alloc,
task, r.consulService)
r.tasks[task.Name] = tr
@ -392,22 +390,6 @@ OUTER:
r.taskLock.RLock()
for _, task := range tg.Tasks {
tr := r.tasks[task.Name]
// Merge in the task resources
task.Resources = update.TaskResources[task.Name]
FOUND:
for _, updateGroup := range update.Job.TaskGroups {
if tg.Name != updateGroup.Name {
continue
}
for _, updateTask := range updateGroup.Tasks {
if updateTask.Name != task.Name {
continue
}
task.Services = updateTask.Services
break FOUND
}
}
tr.Update(update)
}
r.taskLock.RUnlock()

View File

@ -76,6 +76,7 @@ type ConsulService struct {
trackedTasks map[string]*trackedTask
serviceStates map[string]string
allocToService map[string][]string
trackedTskLock sync.Mutex
}
@ -130,12 +131,13 @@ func NewConsulService(config *consulServiceConfig) (*ConsulService, error) {
}
consulService := ConsulService{
client: &consulApiClient{client: c},
logger: config.logger,
node: config.node,
trackedTasks: make(map[string]*trackedTask),
serviceStates: make(map[string]string),
shutdownCh: make(chan struct{}),
client: &consulApiClient{client: c},
logger: config.logger,
node: config.node,
trackedTasks: make(map[string]*trackedTask),
serviceStates: make(map[string]string),
allocToService: make(map[string][]string),
shutdownCh: make(chan struct{}),
}
return &consulService, nil
@ -148,8 +150,18 @@ func (c *ConsulService) Register(task *structs.Task, alloc *structs.Allocation)
c.trackedTskLock.Lock()
tt := &trackedTask{task: task, alloc: alloc}
c.trackedTasks[fmt.Sprintf("%s-%s", alloc.ID, task.Name)] = tt
// Delete any previously registered service as the same alloc is being
// re-registered.
for _, service := range c.allocToService[alloc.ID] {
delete(c.serviceStates, service)
}
c.trackedTskLock.Unlock()
for _, service := range task.Services {
// Track the services this alloc is registering.
c.allocToService[alloc.ID] = append(c.allocToService[alloc.ID], service.Name)
c.logger.Printf("[INFO] consul: registering service %s with consul.", service.Name)
if err := c.registerService(service, task, alloc); err != nil {
mErr.Errors = append(mErr.Errors, err)
@ -165,6 +177,7 @@ func (c *ConsulService) Deregister(task *structs.Task, alloc *structs.Allocation
var mErr multierror.Error
c.trackedTskLock.Lock()
delete(c.trackedTasks, fmt.Sprintf("%s-%s", alloc.ID, task.Name))
delete(c.allocToService, alloc.ID)
c.trackedTskLock.Unlock()
for _, service := range task.Services {
serviceID := alloc.Services[service.Name]
@ -229,14 +242,14 @@ func (c *ConsulService) performSync() {
// Add new services which Consul agent isn't aware of
knownServices[serviceID] = struct{}{}
if _, ok := consulServices[serviceID]; !ok {
c.printLogMessage("[INFO] consul: registering service %s with consul.", service.Name)
c.printLogMessage("[INFO] consul: perform sync, registering service %s with consul.", service.Name)
c.registerService(service, trackedTask.task, trackedTask.alloc)
continue
}
// If a service has changed, re-register it with Consul agent
if service.Hash() != c.serviceStates[serviceID] {
c.printLogMessage("[INFO] consul: reregistering service %s with consul.", service.Name)
c.printLogMessage("[INFO] consul: perform sync hash change, reregistering service %s with consul.", service.Name)
c.registerService(service, trackedTask.task, trackedTask.alloc)
continue
}
@ -268,7 +281,7 @@ func (c *ConsulService) performSync() {
for _, consulService := range consulServices {
if _, ok := knownServices[consulService.ID]; !ok {
delete(c.serviceStates, consulService.ID)
c.printLogMessage("[INFO] consul: deregistering service %v with consul", consulService.Service)
c.printLogMessage("[INFO] consul: perform sync, deregistering service %v with consul", consulService.Service)
c.deregisterService(consulService.ID)
}
}

View File

@ -5,6 +5,7 @@ import (
"fmt"
"log"
"net"
"os"
"path/filepath"
"strconv"
"strings"
@ -441,6 +442,17 @@ func (d *DockerDriver) Start(ctx *ExecContext, task *structs.Task) (DriverHandle
}
}
if authConfig := d.config.Read("docker.auth.config"); authConfig != "" {
if f, err := os.Open(authConfig); err == nil {
defer f.Close()
if authConfigurations, err := docker.NewAuthConfigurations(f); err == nil {
if authConfiguration, ok := authConfigurations.Configs[repo]; ok {
authOptions = authConfiguration
}
}
}
}
err = client.PullImage(pullOptions, authOptions)
if err != nil {
d.logger.Printf("[ERR] driver.docker: failed pulling container %s:%s: %s", repo, tag, err)

View File

@ -10,9 +10,11 @@ import (
"sync"
"time"
"github.com/hashicorp/go-multierror"
"github.com/hashicorp/nomad/client/config"
"github.com/hashicorp/nomad/client/driver"
"github.com/hashicorp/nomad/nomad/structs"
"github.com/mitchellh/hashstructure"
cstructs "github.com/hashicorp/nomad/client/driver/structs"
)
@ -54,6 +56,9 @@ func NewTaskRunner(logger *log.Logger, config *config.Config,
alloc *structs.Allocation, task *structs.Task,
consulService *ConsulService) *TaskRunner {
// Merge in the task resources
task.Resources = alloc.TaskResources[task.Name]
// Build the restart tracker.
tg := alloc.Job.LookupTaskGroup(alloc.TaskGroup)
if tg == nil {
@ -319,21 +324,24 @@ func (r *TaskRunner) handleUpdate(update *structs.Allocation) error {
}
// Extract the task.
var task *structs.Task
var updatedTask *structs.Task
for _, t := range tg.Tasks {
if t.Name == r.task.Name {
task = t
updatedTask = t
}
}
if task == nil {
if updatedTask == nil {
return fmt.Errorf("task group %q doesn't contain task %q", tg.Name, r.task.Name)
}
r.task = task
// Merge in the task resources
updatedTask.Resources = update.TaskResources[updatedTask.Name]
// Update will update resources and store the new kill timeout.
var mErr multierror.Error
if r.handle != nil {
if err := r.handle.Update(task); err != nil {
r.logger.Printf("[ERR] client: failed to update task '%s' for alloc '%s': %v", r.task.Name, r.alloc.ID, err)
if err := r.handle.Update(updatedTask); err != nil {
mErr.Errors = append(mErr.Errors, fmt.Errorf("updating task resources failed: %v", err))
}
}
@ -342,14 +350,26 @@ func (r *TaskRunner) handleUpdate(update *structs.Allocation) error {
r.restartTracker.SetPolicy(tg.RestartPolicy)
}
/* TODO
// Re-register the task to consul and store the updated alloc.
r.consulService.Deregister(r.task, r.alloc)
r.alloc = update
r.consulService.Register(r.task, r.alloc)
*/
// Hash services returns the hash of the task's services
hashServices := func(task *structs.Task) uint64 {
h, err := hashstructure.Hash(task.Services, nil)
if err != nil {
mErr.Errors = append(mErr.Errors, fmt.Errorf("hashing services failed %#v: %v", task.Services, err))
}
return h
}
return nil
// Re-register the task to consul if any of the services have changed.
if hashServices(updatedTask) != hashServices(r.task) {
if err := r.consulService.Register(updatedTask, update); err != nil {
mErr.Errors = append(mErr.Errors, fmt.Errorf("updating services with consul failed: %v", err))
}
}
// Store the updated alloc.
r.alloc = update
r.task = updatedTask
return mErr.ErrorOrNil()
}
// Helper function for converting a WaitResult into a TaskTerminated event.

19
command/fs.go Normal file
View File

@ -0,0 +1,19 @@
package command
import "github.com/mitchellh/cli"
type FSCommand struct {
Meta
}
func (f *FSCommand) Help() string {
return "This command is accessed by using one of the subcommands below."
}
func (f *FSCommand) Synopsis() string {
return "Inspect the contents of an allocation directory"
}
func (f *FSCommand) Run(args []string) int {
return cli.RunResultHelp
}

View File

@ -29,7 +29,7 @@ func (f *FSCatCommand) Help() string {
}
func (f *FSCatCommand) Synopsis() string {
return "displays a file at a given location"
return "Cat a file in an allocation directory"
}
func (f *FSCatCommand) Run(args []string) int {

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@ -28,7 +28,7 @@ Usage: nomad fs ls <alloc-id> <path>
}
func (f *FSListCommand) Synopsis() string {
return "Lists list of files of an allocation directory"
return "List files in an allocation directory"
}
func (f *FSListCommand) Run(args []string) int {

View File

@ -27,7 +27,7 @@ Usage: nomad fs stat <alloc-id> <path>
}
func (f *FSStatCommand) Synopsis() string {
return "Stats an entry in an allocation directory"
return "Stat an entry in an allocation directory"
}
func (f *FSStatCommand) Run(args []string) int {

View File

@ -299,12 +299,14 @@ func (m *monitor) monitor(evalID string, allowPrefix bool) int {
// Monitor the next eval in the chain, if present
if eval.NextEval != "" {
m.ui.Info(fmt.Sprintf(
"Monitoring next evaluation %q in %s",
eval.NextEval, eval.Wait))
if eval.Wait.Nanoseconds() != 0 {
m.ui.Info(fmt.Sprintf(
"Monitoring next evaluation %q in %s",
limit(eval.NextEval, m.length), eval.Wait))
// Skip some unnecessary polling
time.Sleep(eval.Wait)
// Skip some unnecessary polling
time.Sleep(eval.Wait)
}
// Reset the state and monitor the new eval
m.state = newEvalState()

View File

@ -57,8 +57,8 @@ func Commands(metaPtr *command.Meta) map[string]cli.CommandFactory {
Meta: meta,
}, nil
},
"executor": func() (cli.Command, error) {
return &command.ExecutorPluginCommand{
"fs": func() (cli.Command, error) {
return &command.FSCommand{
Meta: meta,
}, nil
},

View File

@ -1414,6 +1414,13 @@ func (s *Service) InitFields(job string, taskGroup string, task string) {
// Validate checks if the Check definition is valid
func (s *Service) Validate() error {
var mErr multierror.Error
// Ensure the name does not have a period in it.
// RFC-2782: https://tools.ietf.org/html/rfc2782
if strings.Contains(s.Name, ".") {
mErr.Errors = append(mErr.Errors, fmt.Errorf("service name can't contain periods: %q", s.Name))
}
for _, c := range s.Checks {
if err := c.Validate(); err != nil {
mErr.Errors = append(mErr.Errors, err)

View File

@ -485,6 +485,14 @@ func TestInvalidServiceCheck(t *testing.T) {
if err := s.Validate(); err == nil {
t.Fatalf("Service should be invalid")
}
s = Service{
Name: "service.name",
PortLabel: "bar",
}
if err := s.Validate(); err == nil {
t.Fatalf("Service should be invalid: %v", err)
}
}
func TestDistinctCheckID(t *testing.T) {

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@ -11,7 +11,7 @@ import (
const (
// TravisRunEnv is an environment variable that is set if being run by
// Travis.
TravisRunEnv = "TRAVIS_RUN"
TravisRunEnv = "CI"
)
type testFn func() (bool, error)

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@ -247,6 +247,9 @@ The `docker` driver has the following host-level configuration options:
to customize this if you use a non-standard socket (http or another
location).
* `docker.auth.config` - Allows an operator to specify a json file which is in
the dockercfg format containing authentication information for private registry.
* `docker.tls.cert` - Path to the server's certificate file (`.pem`). Specify
this along with `docker.tls.key` and `docker.tls.ca` to use a TLS client to
connect to the docker daemon. `docker.endpoint` must also be specified or

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@ -338,7 +338,7 @@ be specified using the `?region=` query parameter.
{
"EvalIDs": ["d092fdc0-e1fd-2536-67d8-43af8ca798ac"],
"EvalCreateIndex": 35,
"NodeModifyIndex": 34,
"NodeModifyIndex": 34
}
```
@ -378,7 +378,7 @@ be specified using the `?region=` query parameter.
{
"EvalID": "d092fdc0-e1fd-2536-67d8-43af8ca798ac",
"EvalCreateIndex": 35,
"NodeModifyIndex": 34,
"NodeModifyIndex": 34
}
```

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@ -140,9 +140,9 @@ we should see both nodes in the `ready` state:
```
$ nomad node-status
ID DC Name Class Drain Status
f7780117-2cae-8ee9-4b36-f34dd796ab02 dc1 nomad <none> false ready
ffb5b55a-6059-9ec7-6108-23a2bbba95da dc1 nomad <none> false ready
ID Datacenter Name Class Drain Status
fca62612 dc1 nomad <none> false ready
c887deef dc1 nomad <none> false ready
```
We now have a simple three node cluster running. The only difference
@ -159,13 +159,13 @@ Then, use the [`run` command](/docs/commands/run.html) to submit the job:
```
$ nomad run example.nomad
==> Monitoring evaluation "77e5075f-2a1b-9cce-d14e-fe98cca9e17f"
==> Monitoring evaluation "8e0a7cf9"
Evaluation triggered by job "example"
Allocation "711edd85-f183-99ea-910a-6445b23d79e4" created: node "ffb5b55a-6059-9ec7-6108-23a2bbba95da", group "cache"
Allocation "98218a8a-627c-308f-8941-acdbffe1940c" created: node "f7780117-2cae-8ee9-4b36-f34dd796ab02", group "cache"
Allocation "e8957a7f-6fff-f61f-2878-57715c26725d" created: node "f7780117-2cae-8ee9-4b36-f34dd796ab02", group "cache"
Allocation "501154ac" created: node "c887deef", group "cache"
Allocation "7e2b3900" created: node "fca62612", group "cache"
Allocation "9c66fcaf" created: node "c887deef", group "cache"
Evaluation status changed: "pending" -> "complete"
==> Evaluation "77e5075f-2a1b-9cce-d14e-fe98cca9e17f" finished with status "complete"
==> Evaluation "8e0a7cf9" finished with status "complete"
```
We can see in the output that the scheduler assigned two of the
@ -181,17 +181,19 @@ Name = example
Type = service
Priority = 50
Datacenters = dc1
Status = <none>
Status = running
Periodic = false
==> Evaluations
ID Priority TriggeredBy Status
77e5075f-2a1b-9cce-d14e-fe98cca9e17f 50 job-register complete
ID Priority Triggered By Status
54dd2ae3 50 job-register complete
==> Allocations
ID EvalID NodeID TaskGroup Desired Status
711edd85-f183-99ea-910a-6445b23d79e4 77e5075f-2a1b-9cce-d14e-fe98cca9e17f ffb5b55a-6059-9ec7-6108-23a2bbba95da cache run running
98218a8a-627c-308f-8941-acdbffe1940c 77e5075f-2a1b-9cce-d14e-fe98cca9e17f f7780117-2cae-8ee9-4b36-f34dd796ab02 cache run running
e8957a7f-6fff-f61f-2878-57715c26725d 77e5075f-2a1b-9cce-d14e-fe98cca9e17f f7780117-2cae-8ee9-4b36-f34dd796ab02 cache run running
ID Eval ID Node ID Task Group Desired Status
102225ab 54dd2ae3 56b590e6 cache run running
f327d2b1 54dd2ae3 e4235508 cache run running
f91137f8 54dd2ae3 56b590e6 cache run running
```
We can see that all our tasks have been allocated and are running.

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@ -50,6 +50,7 @@ Available commands are:
alloc-status Display allocation status information and metadata
client-config View or modify client configuration details
eval-monitor Monitor an evaluation interactively
fs Inspect the contents of an allocation directory
init Create an example job file
node-drain Toggle drain mode on a given node
node-status Display status information about nodes

View File

@ -46,11 +46,11 @@ We can register our example job now:
```
$ nomad run example.nomad
==> Monitoring evaluation "3d823c52-929a-fa8b-c50d-1ac4d00cf6b7"
==> Monitoring evaluation "26cfc69e"
Evaluation triggered by job "example"
Allocation "85b839d7-f67a-72a4-5a13-104020ae4807" created: node "2512929f-5b7c-a959-dfd9-bf8a8eb022a6", group "cache"
Allocation "8ba85cef" created: node "171a583b", group "cache"
Evaluation status changed: "pending" -> "complete"
==> Evaluation "3d823c52-929a-fa8b-c50d-1ac4d00cf6b7" finished with status "complete"
==> Evaluation "26cfc69e" finished with status "complete"
```
Anytime a job is updated, Nomad creates an evaluation to determine what
@ -67,15 +67,16 @@ Name = example
Type = service
Priority = 50
Datacenters = dc1
Status = <none>
Status = running
Periodic = false
==> Evaluations
ID Priority TriggeredBy Status
3d823c52-929a-fa8b-c50d-1ac4d00cf6b7 50 job-register complete
ID Priority Triggered By Status
26cfc69e 50 job-register complete
==> Allocations
ID EvalID NodeID TaskGroup Desired Status
85b839d7-f67a-72a4-5a13-104020ae4807 3d823c52-929a-fa8b-c50d-1ac4d00cf6b7 2512929f-5b7c-a959-dfd9-bf8a8eb022a6 cache run running
ID Eval ID Node ID Task Group Desired Status
8ba85cef 26cfc69e 171a583b cache run running
```
Here we can see that our evaluation that was created has completed, and that
@ -100,13 +101,13 @@ push the updated version of the job:
```
$ nomad run example.nomad
==> Monitoring evaluation "ec199c63-2022-f5c7-328d-1cf85e61bf66"
==> Monitoring evaluation "127a49d0"
Evaluation triggered by job "example"
Allocation "21551679-5224-cb6b-80a2-d0b091612d2e" created: node "2512929f-5b7c-a959-dfd9-bf8a8eb022a6", group "cache"
Allocation "b1be1410-a01c-20ad-80ff-96750ec0f1da" created: node "2512929f-5b7c-a959-dfd9-bf8a8eb022a6", group "cache"
Allocation "ed32a35d-8086-3f04-e299-4432e562cbf2" created: node "2512929f-5b7c-a959-dfd9-bf8a8eb022a6", group "cache"
Allocation "8ab24eef" created: node "171a583b", group "cache"
Allocation "f6c29874" created: node "171a583b", group "cache"
Allocation "8ba85cef" modified: node "171a583b", group "cache"
Evaluation status changed: "pending" -> "complete"
==> Evaluation "ec199c63-2022-f5c7-328d-1cf85e61bf66" finished with status "complete"
==> Evaluation "127a49d0" finished with status "complete"
```
Because we set the count of the task group to three, Nomad created two
@ -132,13 +133,23 @@ specification now:
```
$ nomad run example.nomad
==> Monitoring evaluation "d34d37f4-19b1-f4c0-b2da-c949e6ade82d"
==> Monitoring evaluation "ebcc3e14"
Evaluation triggered by job "example"
Allocation "5614feb0-212d-21e5-ccfb-56a394fc41d5" created: node "2512929f-5b7c-a959-dfd9-bf8a8eb022a6", group "cache"
Allocation "bf7e3ad5-b217-14fe-f3f8-2b83af9dbb42" created: node "2512929f-5b7c-a959-dfd9-bf8a8eb022a6", group "cache"
Allocation "e3978af2-f61e-c601-7aa1-90aea9b23cf6" created: node "2512929f-5b7c-a959-dfd9-bf8a8eb022a6", group "cache"
Allocation "9a3743f4" created: node "171a583b", group "cache"
Evaluation status changed: "pending" -> "complete"
==> Evaluation "d34d37f4-19b1-f4c0-b2da-c949e6ade82d" finished with status "complete"
==> Evaluation "ebcc3e14" finished with status "complete"
==> Monitoring next evaluation "b508d8f0-7f21-8d66-ec59-7f5b2573435a" in 0
==> Monitoring evaluation "b508d8f0"
Evaluation triggered by job "example"
Allocation "926e5876" created: node "171a583b", group "cache"
Evaluation status changed: "pending" -> "complete"
==> Evaluation "b508d8f0" finished with status "complete"
==> Monitoring next evaluation "ea78c05a-a15f-92ae-8c3d-59f4a1edd091" in 10s
==> Monitoring evaluation "ea78c05a"
Evaluation triggered by job "example"
Allocation "3c8589d5" created: node "171a583b", group "cache"
Evaluation status changed: "pending" -> "complete"
==> Evaluation "ea78c05a" finished with status "complete"
```
We can see that Nomad handled the update in three phases, only updating a single task
@ -152,10 +163,10 @@ is stopping the job. This is done with the [`stop` command](/docs/commands/stop.
```
$ nomad stop example
==> Monitoring evaluation "bb407de4-02cb-f009-d986-646d6c11366d"
==> Monitoring evaluation "fd03c9f8"
Evaluation triggered by job "example"
Evaluation status changed: "pending" -> "complete"
==> Evaluation "bb407de4-02cb-f009-d986-646d6c11366d" finished with status "complete"
==> Evaluation "fd03c9f8" finished with status "complete"
```
When we stop a job, it creates an evaluation which is used to stop all
@ -164,7 +175,7 @@ If we try to query the job status, we can see it is no longer registered:
```
$ nomad status example
Error querying job: Unexpected response code: 404 (job not found)
No job(s) with prefix or id "example" found
```
If we wanted to start the job again, we could simply `run` it again.

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@ -83,8 +83,8 @@ $ vagrant ssh
...
$ nomad node-status
ID DC Name Class Drain Status
72d3af97-144f-1e5f-94e5-df1516fe4add dc1 nomad <none> false ready
ID Datacenter Name Class Drain Status
171a583b dc1 nomad <none> false ready
```
The output shows our Node ID, which is a randomly generated UUID,
@ -99,8 +99,8 @@ ring using the [`server-members`](/docs/commands/server-members.html) command:
```text
$ nomad server-members
Name Addr Port Status Proto Build DC Region
nomad.global 127.0.0.1 4648 alive 2 0.1.0dev dc1 global
Name Address Port Status Protocol Build Datacenter Region
nomad.global 127.0.0.1 4648 alive 2 0.3.0dev dc1 global
```
The output shows our own agent, the address it is running on, its