2021-05-27 DCAE OOM Meeting

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Recording:

DCAE_OOM_meeting_05272021.mp4

Attendees:

@Vijay Kumar @Krzysztof Kuzmicki @Krzysztof Opasiak @Sylvain Desbureaux @Jack Lucas @Ajay Deep Singh 

Discussion Topics:

One off meeting to discuss HELM registry design/solution within ONAP - OOM-2734: Support for Helm registry within ONAP Closed

ONAP-HelmRegistrySupport_v1.0.pptx

Open items:

• SECCOM: Authentication choice between Basic Auth Bearer/Token Auth HTTPS(with certificates)

  • Authentication - HTTPS.Basicauth for Istanbul; explore HTTPS/cert for future

  • Fine grained authorization for Helm registry API's??

• OOM: Placeholder repo under OOM(oom/kubernetes/common/chartMuseum)

  • Preference of using charts as-is or custom charts using docker container

• DCAE: Service Application helm charts should be independently installed using “helm install” command

• How Service Applications helm charts will be loaded to chartMuseum:

  • Chart museum will connect to helm repo on RKE/Nexus (depending on installation) and download list of required charts.

  • Extending access outside cluster via Nodeport temporarily(for initial load)

  • Any other proposal ? 

OOM team comments from 05/26 meeting: 

• Remove RKE references from presentation

• Consider using PUSH based approach from external/helm registry to avoid FW/security constraint and keeping all flows unidirectional

Comments/discsussion 05/27/2021 

Determine need for registry 

• Usecase  1 - MS provided by ONAP  (static)

  • Charts packages are released/available and must be preloaded into registry part of Day0 

  • Integration/CLAMP will require static charts access to deploy on-demand/test flows

• Usecase  2 - Support dynamic MS onboarding/upload of helm charts (e.g Acumos flow)

  • Ms are not part of ONAP (private components onboarded per ONAP operator)

Determine how registry should be initalized

• How Service Applications helm charts will be loaded to chartMuseum:

  • Chart museum will connect to helm repo on RKE/Nexus (depending on installation) and download list of required charts.

  • Extending access outside cluster via Nodeport temporarily(for initial load)

  • Any other proposal ? 

    • Option 1 (PULL)- ChartMuseum (within cluster) will pull required charts part of install based on repo/config list provided; has dependency on nexus3 chart/release build out. Repo list can be nexus3 or repo cloned from ONAP/nexus3 part of offline support.

      • Security risk, certificate management etc to be considered

    • Option 2 (PUSH) - Use k8s api to provide required artifact within cluster (binding to push mechanism); all artifacts are made available upfront.

      • Reproducible 

                               Consensus on option#2 

Explore options#2 solutions

1. Preload via configMap

   • size constraint

2. Using script to preload charts

3. Handle via job (calls script or kubectl cp)

   1. chart 1- chartmusuem

   2. chartmuesum-init will include script (machine having access to cluster/chartmuseum registry)

      1. use kubectl proxy

   3. Cons: Not completely cloudnative

   4. Cons: need to be included part of gating/day0 OOM setup prior to Integration/gating executions

4. Docker container

   1. include all charts required part of initial load

   2. Automate docker creation/release and oom update can also be automated; need LF support

      1. Automate release

      2. Automate OOM updates

   3. Cons: Soluton not work if component charts are separated to individual repo

   4. Similar to oom/readiness (https://gerrit.onap.org/r/gitweb?p=oom/readiness.git;a=tree;h=refs/heads/master;hb=refs/heads/master)

5. K8s Operator with chartmuseum

   1. https://github.com/vtuson/chartmuseum-chart/tree/master/templates

Consensus on #3  or #4; finalize target for Istanbul in 1-2 weeks.

Target Repository/placeholder

Charts for ChartMuseum - oom/kubernetes/platform  -  Components should be able to use onap/chartmuseum or external instance based on configuration in values.yaml

Option#3 scripts → oom/kubernetes/contrib/tools