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Reviewing Tasks

An operator uses the CLI to interact with the Director. Certain CLI commands result in complex and potentially long running operations against the IaaS, blobstore, or other resources. Such commands are associated with a Director task and continue running on the Director even if the CLI disconnects from the Director.

To find out if a CLI command has an associated Director task, look for "Director task [NUM]" in its output:

bosh -d zookeeper deploy zookeeper.yml

Should result in:

Using deployment 'zookeeper'

Task 766 # <---
...snip...

Currently active tasks

At any time the Director might be performing multiple tasks at once. Active tasks can be in two states: queued or processing.

To see all currently active tasks:

bosh tasks

Should result in:

+-----+------------+-------------------------+-------+-------------------------------+--------+
| #   | State      | Timestamp               | User  | Description                   | Result |
+-----+------------+-------------------------+-------+-------------------------------+--------+
| 766 | processing | 2015-01-27 21:39:30 UTC | admin | create deployment             |        |
| 765 | queued     | 2015-01-27 21:35:02 UTC | admin | scheduled SnapshotDeployments |        |
+-----+------------+-------------------------+-------+-------------------------------+--------+

Joining tasks

Since Director tasks continue to run in the background even if the CLI has disconnected, you can rejoin a task at any time:

bosh task 766

Should result in:

Director task 766
...snip...

Tasks can be joined in different output modes:

  • event (default): human readable high-level events
  • debug: detailed logs showing all internal communication between the Director and the Agents
  • cpi: detailed logs showing all requests and responses from the CPI
bosh task 766 --debug

Should result in:

Director task 766

I, [2015-01-27T21:33:19.469158 #1769] [0x3fab30147330]  INFO -- TaskHelper: Director Version: 1.2811.0
I, [2015-01-27T21:33:19.469212 #1769] [0x3fab30147330]  INFO -- TaskHelper: Enqueuing task: 766
I, [2015-01-27 21:33:21 #2725] []  INFO -- DirectorJobRunner: Looking for task with task id 766
D, [2015-01-27 21:33:21 #2725] [] DEBUG -- DirectorJobRunner: (0.001125s) SELECT * FROM "tasks" WHERE "id" = 766

...snip...

Canceling tasks

Tasks can be cancelled before and while they are running. Canceling an active task will not take immediate effect; however, the Director will stop task execution at a next safe checkpoint. To cancel a task, either press Ctrl+C while tracking the task or run:

bosh cancel-task 766

Finished tasks

The Director keeps a record of tasks that have finished. Finished tasks can be in two states: done or error.

To view recently finished tasks:

bosh tasks --recent

Should result in:

+-----+-------+-------------------------+--------+--------------------------+-----------------------------------------------------------+
| #   | State | Timestamp               | User   | Description              | Result                                                    |
+-----+-------+-------------------------+--------+--------------------------+-----------------------------------------------------------+
| 768 | done  | 2015-01-27 21:39:30 UTC | admin  | run errand smoke-tests   | Errand `smoke-tests' completed successfully (exit code 0) |
| 766 | done  | 2015-01-27 21:33:42 UTC | admin  | create deployment        | /deployments/mysql-dep                                    |
| 765 | error | 2015-01-27 21:27:48 UTC | admin  | create deployment        | Timed out pinging to 95206a0e-4dd9-4598-a074-2aee54793f0f |
| 764 | done  | 2015-01-27 21:25:50 UTC | admin  | create stemcell          | /stemcells/bosh-aws-xen-ubuntu-trusty-go_agent/2827       |
| 760 | done  | 2015-01-27 21:25:01 UTC | admin  | create release           | Created release `cf-mysql/16'                             |
| 759 | error | 2015-01-27 21:23:43 UTC | admin  | create release           | No space left on device @ io_write -...                   |
+-----+-------+-------------------------+--------+--------------------------+-----------------------------------------------------------+

Showing 30 recent tasks

You can also run bosh tasks --recent=NUM to retrieve more tasks.

Note

--all flag shows all tasks. Without that flag, the Director returns a subset of finished tasks that it deems important.

Joining finished tasks

Finished tasks can be joined just like active tasks but only to view their output (see various output modes). Finished tasks cannot be cancelled.