Deploy Kuma on Universal is broken

[wahmedswl]

What happened?

Hi!

Quick Start example for Deploy Kuma on Universal is broken. Able to bring-up Redis service via kuma-dp but not the 2nd app because it wanna run admin on 9902 but it's already taken by redis service "dataplane.readinessReporter.port": "9902",. How to configure the "dataplane.readinessReporter.port" explicitly via dataplane cli.

Thanks

[jijiechen]

Thanks for reporting.

We didn't provide a CLI argument to configure this port but you can configure it using an environment variable when you need to run multiple kuma DPs on the same host, here is an example:

export KUMA_READINESS_PORT=9903
export KUMA_APPLICATION_PROBE_PROXY_PORT=0
kuma-dp run

In addition, there is another port which may conflict among multiple DPs and you may disable it on Universal DPs by exporting environment variable KUMA_APPLICATION_PROBE_PROXY_PORT as 0. This feature is mainly used by Kubernetes users.

[wahmedswl]

@jijiechen Can this be configured via DP manifest yaml so that this can be put in Version Contol?

[wahmedswl]

@jijiechen Also, what is the way to configure multiple services again single Dataplane? In univeral mode, single kuma-dp should be run on machine, isn't it?

Thanks

[lukidzi]

Triage: we need to rework our quickstart on Universal, but we should add at least some improvement into docs configuring the probe port to avoid conflict

xref: #1960

[jijiechen]

These port unfortunately can't be configured via dataplane manifest.
Regarding you questions of "configuring multiple services again single Dataplane", I don't get your actual idea. It's recommended to run only a single dataplane on a host.

[wahmedswl]

@jijiechen Yes, that's why asked how to run multiple services on same dataplane? E.g. they create separate dataplane for every service; just look at the example in quick start, Redis and Example app have separate dataplane.

[jijiechen]

Conceptually a dataplane is a running instance of a service, so the relation service:dataplane has a 1:N mapping. In a typical microservices architecture, services are isolated units serving different business functionalities; and dataplanes are instances of each of these services.
On the other hand, technically, we generate different service objects/resources when a dataplane defines multiple ports in its manifests.

[vovasoft]

export KUMA_READINESS_PORT=9903
export KUMA_APPLICATION_PROBE_PROXY_PORT=0
kuma-dp run

It's not work

[Automaat]

The quickstart demo now works after rewritting it, and errors from this issues are now solved by: #2005

[jijiechen]

Hi @vovasoft we'll continue discussing in this issue #2010