147 lines
6.0 KiB
ReStructuredText
147 lines
6.0 KiB
ReStructuredText
Quick Start
|
|
===========
|
|
|
|
Install and Run Mistral
|
|
-----------------------
|
|
|
|
* Go through the installation manual: :doc:`Mistral Installation Guide </guides/installation_guide>`
|
|
|
|
Install Mistral Client
|
|
----------------------
|
|
|
|
* For installing mistralclient, please refer to :doc:`Mistral Client / CLI Guide </guides/mistralclient_guide>`
|
|
|
|
Export Keystone Credentials
|
|
---------------------------
|
|
|
|
To use the OpenStack command line tools you should specify environment variables with the configuration details for your OpenStack installation. The following example assumes that the Identity service is at ``127.0.0.1:5000``, with a user ``admin`` in the ``admin`` tenant whose password is ``password``::
|
|
|
|
$ export OS_AUTH_URL=http://127.0.0.1:5000/v2.0/
|
|
$ export OS_TENANT_NAME=admin
|
|
$ export OS_USERNAME=admin
|
|
$ export OS_PASSWORD=password
|
|
|
|
Write Workflow
|
|
--------------
|
|
|
|
For example, we have the following workflow::
|
|
|
|
---
|
|
version: "2.0"
|
|
|
|
my_workflow:
|
|
type: direct
|
|
|
|
input:
|
|
- names
|
|
|
|
tasks:
|
|
task1:
|
|
with-items: name in <% $.names %>
|
|
action: std.echo output=<% $.name %>
|
|
on-success: task2
|
|
|
|
task2:
|
|
action: std.echo="Done"
|
|
|
|
This is a simple workflow iterates through the given list of names in its first task (using "with-items") and stores
|
|
them as a task result (using echo action) and then stores word "Done" as a result of the second task.
|
|
|
|
Create Workflow Object
|
|
----------------------
|
|
|
|
Use *Mistral CLI* to create the workflow::
|
|
|
|
mistral workflow-create <workflow.yaml>
|
|
|
|
Make sure that output is like the following::
|
|
|
|
+-------------+--------+---------+---------------------+------------+
|
|
| Name | Tags | Input | Created at | Updated at |
|
|
+-------------+--------+---------+---------------------+------------+
|
|
| my_workflow | <none> | names | 2015-08-13 08:44:49 | None |
|
|
+-------------+--------+---------+---------------------+------------+
|
|
|
|
|
|
Run Workflow and Check the Result
|
|
---------------------------------
|
|
|
|
Use *Mistral CLI* to run just created workflow. Pass variable **names** as **workflow_input**::
|
|
|
|
mistral execution-create my_workflow '{"names": ["John", "Mistral", "Ivan", "Crystal"]}'
|
|
|
|
Make sure output is like the following::
|
|
|
|
+-------------+--------------------------------------+
|
|
| Field | Value |
|
|
+-------------+--------------------------------------+
|
|
| ID | 056c2ed1-695f-4ccd-92af-e31bc6153784 |
|
|
| Workflow | my_workflow |
|
|
| Description | |
|
|
| State | RUNNING |
|
|
| State info | None |
|
|
| Created at | 2015-08-28 09:05:00.065917 |
|
|
| Updated at | 2015-08-28 09:05:00.844990 |
|
|
+-------------+--------------------------------------+
|
|
|
|
After a while, check the status of the workflow execution (put execution id instead of example)::
|
|
|
|
mistral execution-get 056c2ed1-695f-4ccd-92af-e31bc6153784
|
|
|
|
+-------------+--------------------------------------+
|
|
| Field | Value |
|
|
+-------------+--------------------------------------+
|
|
| ID | 056c2ed1-695f-4ccd-92af-e31bc6153784 |
|
|
| Workflow | my_workflow |
|
|
| Description | |
|
|
| State | SUCCESS |
|
|
| State info | None |
|
|
| Created at | 2015-08-28 09:05:00 |
|
|
| Updated at | 2015-08-28 09:05:03 |
|
|
+-------------+--------------------------------------+
|
|
|
|
Statuses of each **task** also can be checked::
|
|
|
|
mistral task-list 056c2ed1-695f-4ccd-92af-e31bc6153784
|
|
|
|
+--------------------------------------+-------+---------------+--------------------------------------+---------+
|
|
| ID | Name | Workflow name | Execution ID | State |
|
|
+--------------------------------------+-------+---------------+--------------------------------------+---------+
|
|
| 91874635-dcd4-4718-a864-ac90408c1085 | task1 | my_workflow | 056c2ed1-695f-4ccd-92af-e31bc6153784 | SUCCESS |
|
|
| 3bf82863-28cb-4148-bfb8-1a6c3c115022 | task2 | my_workflow | 056c2ed1-695f-4ccd-92af-e31bc6153784 | SUCCESS |
|
|
+--------------------------------------+-------+---------------+--------------------------------------+---------+
|
|
|
|
Checking the result of task *'task1'*::
|
|
|
|
mistral task-get-result 91874635-dcd4-4718-a864-ac90408c1085
|
|
|
|
[
|
|
"John",
|
|
"Mistral",
|
|
"Ivan",
|
|
"Crystal"
|
|
]
|
|
|
|
If needed, we can go deeper and look at list of results of **action_executions** of single task::
|
|
|
|
mistral action-execution-list 91874635-dcd4-4718-a864-ac90408c1085
|
|
|
|
+--------------------------------------+----------+---------------+-----------+---------+------------+-------------+
|
|
| ID | Name | Workflow name | Task name | State | State info | Is accepted |
|
|
+--------------------------------------+----------+---------------+-----------+---------+------------+-------------+
|
|
| 20c2b65d-b899-437f-8e1b-50fe477fbf4b | std.echo | my_wirkflow | task1 | SUCCESS | None | True |
|
|
| 6773c887-6eff-46e6-bed9-d6b67d77813b | std.echo | my_wirkflow | task1 | SUCCESS | None | True |
|
|
| 753a9e39-d93e-4751-a3c1-569d1b4eac64 | std.echo | my_wirkflow | task1 | SUCCESS | None | True |
|
|
| 9872ddbc-61c5-4511-aa7e-dc4016607822 | std.echo | my_wirkflow | task1 | SUCCESS | None | True |
|
|
+--------------------------------------+----------+---------------+-----------+---------+------------+-------------+
|
|
|
|
Checking the result of first **action_execution**::
|
|
|
|
mistral action-execution-get-output 20c2b65d-b899-437f-8e1b-50fe477fbf4b
|
|
|
|
{
|
|
"result": "John"
|
|
}
|
|
|
|
**Congratulations! Now you are ready to use OpenStack Workflow Service!**
|