Orchestrate microservices

General
1

Hello,

I am analyzing some tools in order to orchestrate some microservices, so as to guarantee a synchronous process between all of them. Does node-red work for this purpose?

Kind regards

2

Depends how you communicate to these microservices.

node-red can talk many protocols on many mediums.

Perhaps you you provide a bit more info we can advise?

Are you meaning node-red would communicate to these services via REST apis? UDP? TCP? Serial? MQTT?

PS all of this :arrow_up: is possible & common place in node-red.

What is meant by "guarantee a synchronous process" - you can certainly ensure services are avaiable but ensuring synchronous process? Please explain what you are hoping to achieve.

3

Thanks for answering. The communication would be via REST APIs. With "guarantee a synchronous process" I meant to call a microservice, wait for its response and depending on it, decide the action to take.

4

Then, yes, all day long every day. This is all built into core.

The built in http request node can GET/POST/WHATEVER_YOU_DECIDE (plus headers if needed) to a REST interface & return the data (JSON / String / Buffer / whatever). From there depending on your criteria you might want to perform processing based on the statusCode or the data returned.

NOTE: The http requests are async by design (to prevent blocking) BUT as a node-red flow wont process the next item until the http request is resolved and returned - to all intents and purposes - appears to be synchronous.

There are far more possibilities that I am able to describe.

There are contrib nodes (like state machines, CRON, PLC Drivers) than can further automate things.

For example, I have one instance authenticates against users in a CouchDB, retrieves a cookie/token then performs POSTs/GETs etc against the DB using the cookie/token - all via HTTP

See here for a bit more info related to HTTP capabilities (note, this is only scratching the surface)

See this playlist: Node-RED Essentials. It is by the developers of node-red. They're nice & short and to the point. You should get a good feel for node-red in about 1hr.

2 Likes
5

Thank you very much for the info

6

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