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 wget https://get.helm.sh/helm-v3.5.2-linux-amd64.tar.gz
 tar -zxvf helm-v3.5.2-linux-amd64.tar.gz
 sudo mv linux-amd64/helm /usr/local/bin/helm-v3.5.2
 sudo ln -s /usr/local/bin/helm-v3.5.2 /usr/local/bin/helm
 sudo rm /usr/local/bin/helm
 sudo ln -s /usr/local/bin/helm-v3.5.2 /usr/local/bin/helm

3) Tweak Microk8s

The below tweaks are not strictly necessary, but they help in making the setup more simple and flexible.

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microk8s kubectl describe node

to make things simpler as we will most likely interact a lot with kubectl, let's install a local copy of kubectl so we can use it to interact with the kubernetes cluster in a more straightforward way

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If you want to use a the same link trick as for helm (see above) this could allow you to switch between kubectl versions if needed

Now we need to provide our local kubectl client with a proper config file so that it can access the cluster, microk8s allows to retrive retrieve the cluster config very easily

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Client Version: version.Info{Major:"1", Minor:"19", GitVersion:"v1.19.7", GitCommit:"1dd5338295409edcfff11505e7bb246f0d325d15", GitTreeState:"clean", BuildDate:"2021-01-13T13:23:52Z", GoVersion:"go1.15.5", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"19+", GitVersion:"v1.19.7-34+02d22c9f4fb254", GitCommit:"02d22c9f4fb2545422b2b28e2152b1788fc27c2f", GitTreeState:"clean", BuildDate:"2021-02-11T20:13:16Z", GoVersion:"go1.15.8", Compiler:"gc", Platform:"linux/amd64"}

4) Download OOM repo

OOM provides a couple of plugins that we need to install for helm, the easiest is to get them straight from the repository.

Since we will also build the charts locally, it's the right time to download a local copy, you'll need to install git if it's not available yet on your machine

the example below pulls the latest version from master, it's probably wiser to select the right version (honolulu branch or a specific review you want to test)

cd
git clone --recursive "https://gerrit.onap.org/r/oom"

5) Install the needed Helm plugins

Onap deployments are using the deploy and undeploy plugins for helm

to install them just run :

helm plugin install ./oom/kubernetes/helm/plugins/undeploy/
helm plugin install ./oom/kubernetes/helm/plugins/deploy/

this will copy the plugins into your home directory .helm folder and make them available as helm commands

Another plugin we need is the push plugin, with helm3 there is no more an embedded repo to use.

helm plugin install https://github.com/chartmuseum/helm-push.git

Once all plugins are installed, you should see them as available helm commands when doing :

helm --help

6) Install the charmuseum repository

To align with how the previous release were deployed, we will setup a local chart repository.

To do, download the chartmuseum script and run it as a background task

curl https://raw.githubusercontent.com/helm/chartmuseum/main/scripts/get-chartmuseum | bash
mkdir ~/chartmuseum
chartmuseum --port=8080   --storage="local"   --storage-local-rootdir="~/chartstorage" &

you should see the chartmuseum repo starting locally, you can press enter to come back to your terminal

you can now inform helm that a local repo is available for use :

helm repo add local http://localhost:8080

Note this is a very basic setup, meaning you'll need to startup your local repo if you shut down your VM or if you exit this terminal, there are other ways to do it, like using a docker compose to ensure 'it's always on'