How Can I launch an experiment using Golang/Python?

[cauwulixuan]

I'm newbee here, I followed Tutorials here, and here is my question:

In v0.7, I can setup CRDs in kubernetes cluster, and launch experiments by setup Experiment CR, how can I do that in v0.10?

If I need launch experiments and report results in my app (written by golang or python ...), how can I make it work using a iter8 SDK(something like that) OR just setup CRD and CR instead of a binary iter8 CLI ?

Many thanks if you have any suggestions.

[sriumcp]

Hi there! Welcome to Iter8!

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In v0.10, you do not need a CRD to run experiments inside Kubernetes. Iter8 v0.10 uses a combination of namespace scoped built-in Kubernetes resources (like secrets and jobs) to run the experiment inside Kubernetes.

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The iter8 binary enables you to set up Kubernetes experiments in addition to local experiments. Please refer to https://iter8.tools/0.10/tutorials/load-test-http/kubernetesusage/ and https://iter8.tools/0.10/tutorials/load-test-grpc/kubernetesusage/. Both of these are examples of launching experiments inside Kubernetes.

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In the Golang source for Iter8, launching Kubernetes experiments is enabled by this method. For an example of how this method is used, please see here.

Perhaps the Golang SDK for launching experiments should be better documented in the README? If you think this documentation would help, could you please create a documentation issue in this repo? We are happy to work on these docs if it would be useful for you.

[cauwulixuan]

Thanks for your reply @sriumcp

Iter8 v0.10 uses a combination of namespace scoped built-in Kubernetes resources (like secrets and jobs) to run the experiment inside Kubernetes.

I can see secrets and jobs were created after I ran

iter8 k launch -c load-test-http --set url=https://httpbin.org/get

But I can't just use iter8 CLI in my code, right? Do you have any other more native usage in my senario? I also create a documentation issue #1267

[cauwulixuan]

@sriumcp BTW, How can I setup custom metrics? I want to use several custom metrics in prometheus, not only built-in HTTP latency and error-related metrics. Should I setup a new task, and could you provide a official progress on setup task?

[sriumcp]

Hi @cauwulixuan Yes, custom Prometheus metrics (or any other database) is already possible in v0.10. We're in the process of documenting this. @Alan-Cha... comments?