Mistral Configuration Guide =========================== Mistral configuration is needed for getting it work correctly either with real OpenStack environment or without OpenStack environment. **NOTE:** The most of the following operations should performed in mistral directory. 1. Generate *mistral.conf* (if it does not already exist):: oslo-config-generator --config-file tools/config/config-generator.mistral.conf --output-file etc/mistral.conf 2. Edit file **etc/mistral.conf**. 3. **If you are not using OpenStack, skip this item.** Provide valid keystone auth properties:: [keystone_authtoken] auth_uri = http://:5000/v3 identity_uri = http:// admin_password = admin_tenant_name = 4. **If you don't use OpenStack**, provide ``auth_enable = False`` in config file:: [pecan] auth_enable = False 5. **If you are not using OpenStack, skip this item**. Register Mistral service and Mistral endpoints on Keystone:: $ MISTRAL_URL="http://[host]:[port]/v2" $ keystone service-create --name mistral --type workflowv2 $ keystone endpoint-create --service_id mistral --publicurl $MISTRAL_URL --adminurl $MISTRAL_URL --internalurl $MISTRAL_URL 6. Configure transport properties in the corresponding config section: for RabbitMQ it is **oslo_messaging_rabbit**:: [oslo_messaging_rabbit] rabbit_userid = rabbit_password = rabbit_host = **NOTE**: Make sure that backend transport configuration is correct. Example for RabbitMQ:: [DEFAULT] rpc_backend = rabbit 7. Configure database. **SQLite can't be used in production**. Use *MySQL* or *PostgreSQL* instead. Here are the steps how to connect *MySQL* DB to Mistral: Make sure you have installed **mysql-server** package on your Database machine (it can be your Mistral machine as well). Install MySQL driver for python:: pip install mysql-python Create the database and grant privileges:: mysql -u root -p CREATE DATABASE mistral; USE mistral GRANT ALL ON mistral.* TO 'root':@; Configure connection in Mistral config:: [database] connection = mysql://:@:3306/mistral **NOTE**: If PostgreSQL is used, configure connection item as below:: connection = postgresql://:@:5432/mistral 8. **If you are not using OpenStack, skip this item.** Update mistral/actions/openstack/mapping.json file which contains all allowed OpenStack actions, according to the specific client versions of OpenStack projects in your deployment. Please find more detailed information in tools/get_action_list.py script. 9. Configure Task affinity feature if needed. It is needed for distinguishing either single task executor or one task executor from group of task executors:: [executor] host = my_favorite_executor Then, this executor can be referred in DSL by:: ...Workflow YAML... my_task: ... target: my_favorite_executor ...Workflow YAML... 10. After that try to run mistral engine and see it is running without any error:: mistral-server --config-file --server engine