Add NOMAD_JOB_NAME to task environment

CHANGELOG.md

@@ -8,6 +8,7 @@ IMPROVEMENTS:
   * client: Enforce shared allocation directory disk usage [GH-1580]
   * client: Introduce a `secrets/` directory to tasks where sensitive data can
     be written [GH-1681]
+  * driver: Export `NOMAD_JOB_NAME` environment variable [GH-1804]
   * driver/docker: Support Docker volumes [GH-1767]
   * driver/docker: Allow Docker logging to be configured [GH-1767]
 

client/driver/driver.go

@@ -142,6 +142,7 @@ func GetTaskEnv(allocDir *allocdir.AllocDir, node *structs.Node,
 		SetTaskMeta(task.Meta).
 		SetTaskGroupMeta(tg.Meta).
 		SetJobMeta(alloc.Job.Meta).
+		SetJobName(alloc.Job.Name).
 		SetEnvvars(task.Env).
 		SetTaskName(task.Name)
 

client/driver/driver_test.go

@@ -153,6 +153,7 @@ func TestDriver_GetTaskEnv(t *testing.T) {
 		"NOMAD_ALLOC_ID":                alloc.ID,
 		"NOMAD_ALLOC_NAME":              alloc.Name,
 		"NOMAD_TASK_NAME":               task.Name,
+		"NOMAD_JOB_NAME":                alloc.Job.Name,
 	}
 
 	act := env.EnvMap()

client/driver/env/env.go

@@ -40,6 +40,9 @@ const (
 	// TaskName is the environment variable for passing the task name.
 	TaskName = "NOMAD_TASK_NAME"
 
+	// JobName is the environment variable for passing the job name.
+	JobName = "NOMAD_JOB_NAME"
+
 	// AllocIndex is the environment variable for passing the allocation index.
 	AllocIndex = "NOMAD_ALLOC_INDEX"
 
@@ -98,6 +101,7 @@ type TaskEnvironment struct {
 	PortMap          map[string]int
 	VaultToken       string
 	InjectVaultToken bool
+	JobName          string
 
 	// taskEnv is the variables that will be set in the tasks environment
 	TaskEnv map[string]string
@@ -188,6 +192,9 @@ func (t *TaskEnvironment) Build() *TaskEnvironment {
 	if t.TaskName != "" {
 		t.TaskEnv[TaskName] = t.TaskName
 	}
+	if t.JobName != "" {
+		t.TaskEnv[JobName] = t.JobName
+	}
 
 	// Build the node
 	if t.Node != nil {
@@ -452,11 +459,21 @@ func (t *TaskEnvironment) SetTaskName(name string) *TaskEnvironment {
 	return t
 }
 
+func (t *TaskEnvironment) SetJobName(name string) *TaskEnvironment {
+	t.JobName = name
+	return t
+}
+
 func (t *TaskEnvironment) ClearTaskName() *TaskEnvironment {
 	t.TaskName = ""
 	return t
 }
 
+func (t *TaskEnvironment) ClearJobName() *TaskEnvironment {
+	t.JobName = ""
+	return t
+}
+
 func (t *TaskEnvironment) SetVaultToken(token string, inject bool) *TaskEnvironment {
 	t.VaultToken = token
 	t.InjectVaultToken = inject

website/source/docs/jobspec/environment.html.md

@@ -52,6 +52,10 @@ environment variables.
     <td>`NOMAD_TASK_NAME`</td>
     <td>The task's name</td>
   </tr>
+  <tr>
+    <td>`NOMAD_JOB_NAME`</td>
+    <td>The job's name</td>
+  </tr>
   <tr>
     <td>`NOMAD_IP_<label>`</td>
     <td>The IP of the the port with the given label</td>
@@ -76,10 +80,11 @@ environment variables.
 
 ## Task Identifiers
 
-Nomad will pass both the allocation ID and name as well as the task's name.
-These are given as `NOMAD_ALLOC_ID`, `NOMAD_ALLOC_NAME`, `NOMAD_ALLOC_INDEX` and
-`NOMAD_TASK_NAME`. The allocation ID and index can be useful when the task being
-run needs a unique identifier or to know its instance count.
+Nomad will pass both the allocation ID and name as well as the task and job's
+names.  These are given as `NOMAD_ALLOC_ID`, `NOMAD_ALLOC_NAME`,
+`NOMAD_ALLOC_INDEX`, `NOMAD_JOB_NAME`, and `NOMAD_TASK_NAME`. The allocation ID
+and index can be useful when the task being run needs a unique identifier or to
+know its instance count.
 
 ## Resources
 

website/source/docs/jobspec/interpreted.html.md

@@ -224,6 +224,10 @@ a particular node and as such can not be used in constraints.
     <td><tt>${NOMAD_TASK_NAME}</tt></td>
     <td>The task's name</td>
   </tr>
+  <tr>
+    <td><tt>${NOMAD_JOB_NAME}</tt></td>
+    <td>The job's name</td>
+  </tr>
   <tr>
     <td><tt>${NOMAD_IP_&lt;label&gt;}</tt></td>
     <td>The IP for the given port <tt>label</tt>. See