> > Hi, > > I see that Mistral can perform workflow automation and task execution per > scheduling but wanted to confirm if workflows can be executed in real-time > on-demand via REST API? Can a REST API call into Mistral execute the > workflow upon request, is what I am confirming, as it seems it is the case. > Besides on-demand, is the purpose of Triggers currently being developed to > automatically detect changes or notifications and execute in response to > these triggers? If so I would highly recommend triggers based on database > change log, on file changes , on message arrival inside an AMQP queue, and on > polling a REST API in which you expect a certain result, or status message. > > Secondly, if one has a very tailored and mature cloud orchestration and > operations process in place and wants to migrate to OpenStack and offer > similar automation integrating with external change management systems, > performing secondary LDAP searches, performing multiple SOR / DB queries, and > thus interacting with other external non-cloud related technologies as part > of the process of creating new tenants, adding users, creating new images, > and creating and deploying machine instances would mistral be the best > mechanism for this, in terms of driving automation, and invoking 3rd party > APIs during and as part of the process? > > My current use case looks like this: > > 1) Tenant requests VM with specific properties (image, etc etc) --> Service > Now > 2) Service Now ---> API ( based on properties/inputs ) query a DB to > automatically generate a server name ) > 3) API ---> OpenStack API to provision new VM. > > > This is just an example, during this exchange, the API will interact with > several external systems besides a DB, and do more than just autogenerate > custom and unique machine names. In this case, the API could be Mistral that > I am calling via REST. I would create API wrappers to the other components ( > which for the most part, I already have) and Mistral would now call both > wrapper APIs and OpenStack APIs to provision a machine via Nova with all of > the dependencies met. > > Your advice is kindly appreciated, > Raanan > > >
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