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Deploying onos-topo

This guide deploys onos-topo through its Helm chart assumes you have a Kubernetes cluster running with an atomix controller deployed in a namespace. onos-topo Helm chart is based on Helm 3.0 version, with no need for the Tiller pod to be present. If you don't have a cluster running and want to try on your local machine please follow first the Kubernetes setup steps outlined in deploy with Helm. The following steps assume you have the setup outlined in that page, including the micro-onos namespace configured.

Installing

To install the onos-topo published chart in the micro-onos namespace run:

$ helm -n micro-onos install onos-topo onosproject/onos-topo

Note, that this assumes that https://charts.onosproject.org was added as onosproject Helm repo.

Alternately, you can deploy your own version of the chart from the root directory of the onos-helm-charts repo via the following:

$ helm install -n micro-onos onos-uenib onos-uenib

In either case, the output of the helm install command should look similar to the following:

NAME: onos-topo
LAST DEPLOYED: Wed Jul 14 14:30:27 2021
NAMESPACE: micro-onos
STATUS: deployed
REVISION: 1
TEST SUITE: None

helm install assigns a unique name to the chart and displays all the k8s resources that were created by it. To list the charts that are installed and view their statuses, run helm ls:

$ helm -n micro-onos ls
NAME        NAMESPACE   REVISION    UPDATED                             STATUS      CHART               APP VERSION
onos-topo   micro-onos  1           2021-07-14 14:30:27.81784 -0700 PDT deployed    onos-topo-1.0.15    v0.7.9

Partition Set

The onos-topo chart also deploys a custom Atomix PartitionSet resource to store all the topology information in a replicated and fail-safe manner. In the following example there is only one partition set deployed onos-topo-consensus-store-1-0.

$ kubectl -n micro-onos get pods
NAME                            READY   STATUS    RESTARTS   AGE
onos-topo-854bf799f-lrnkd       3/3     Running   0          2m42s
onos-topo-consensus-store-1-0   1/1     Running   0          2m41s

One can customize the number of partitions and replicas by modifying, in values.yaml, under store/raft the values of 

partitions: 1
partitionSize: 1

Uninstalling

To uninstall the onos-topo chart, run the following:

 helm delete -n micro-onos onos-topo

Troubleshooting

Helm offers two flags to help you debug your chart. This can be useful if your chart does not install, the pod is not running for some reason, or you want to trouble-shoot custom configuration values,

  • --dry-run check the chart without actually installing the pod.
  • --debug prints out more information about your chart
helm install -n micro-onos onos-topo --debug --dry-run onos-topo/