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using-az-aro.md

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Using az aro

This repo includes the development az aro extension. If you have a whitelisted subscription, it can be used against the pre-GA Azure Red Hat OpenShift v4 service, or (by setting RP_MODE=development) it can be used against a development RP running at https://localhost:8443/.

Installing the extension

  1. Install a supported version of Python, if you don't have one installed already. The az client supports Python 2.7 and Python 3.5+. A recent Python 3.x version is recommended.

  2. Install the az client, if you haven't already.

  3. Log in to Azure:

    az login

  4. Git clone this repository to your local machine:

    git clone https://github.com/jim-minter/rp
cd rp

    Note: you will be able to update the az aro extension in the future by simply running git pull.

  5. Build the development az aro extension:

    make az

  6. Add the ARO extension path to your az configuration:

    cat >>~/.azure/config <<EOF
[extension]
dev_sources = $PWD/python
EOF

  7. Verify the ARO extension is registered:

    az -v
...
Extensions:
aro                                0.1.0 (dev) /path/to/rp/python/az/aro
...
Development extension sources:
    /path/to/rp/python
...

Registering the resource provider

If using the pre-GA Azure Red Hat OpenShift v4 service with a whitelisted subscription, ensure that the Microsoft.RedHatOpenShift resource provider is registered:

az provider register -n Microsoft.RedHatOpenShift --wait

Prerequisites to create an Azure Red Hat OpenShift v4 cluster

You will need the following in order to create an Azure Red Hat OpenShift v4 cluster:

  1. A vnet containing two empty subnets, each with no network security group attached. Your cluster will be deployed into these subnets.

    RESOURCEGROUP=cluster-rg
CLUSTER=cluster

az group create -g "$RESOURCEGROUP" -l eastus
az network vnet create -g "$RESOURCEGROUP" -n vnet --address-prefixes 10.0.0.0/9
for subnet in "$CLUSTER-master" "$CLUSTER-worker"; do
  az network vnet subnet create -g "$RESOURCEGROUP" --vnet-name vnet -n "$subnet" --address-prefixes 10.$((RANDOM & 127)).$((RANDOM & 255)).0/24
done

  2. A cluster AAD application (client ID and secret) and service principal, or sufficient AAD permissions for az aro create to create these for you automatically.

  3. The RP service principal and cluster service principal must each have the Contributor role on the cluster vnet. If you have the "User Access Administrator" role on the vnet, az aro create will set up the role assignments for you automatically.

Using the extension

  1. Create a cluster:

    az aro create -g "$RESOURCEGROUP" -n "$CLUSTER" --vnet vnet --master-subnet "$CLUSTER-master" --worker-subnet "$CLUSTER-worker"

    Note: cluster creation takes about 45 minutes.

  2. Access the cluster console:

    You can find the cluster console URL (of the form https://console-openshift-console.apps.<random>.eastus.aroapp.io/) in the Azure Red Hat OpenShift v4 cluster resource:

    az aro list -o table

    You can log into the cluster using the kubeadmin user. The password for the kubeadmin user can be found as follows:

    az aro get-credentials -g "$RESOURCEGROUP" -n "$CLUSTER"

    Note: the cluster console certificate is not yet signed by a CA: expect a security warning in your browser.

  3. Scale the number of cluster VMs:

    COUNT=4

az aro update -g "$RESOURCEGROUP" -n "$CLUSTER" --worker-count "$COUNT"

  4. Delete a cluster:

    az aro delete -g "$RESOURCEGROUP" -n "$CLUSTER"

# (optionally)
for subnet in "$CLUSTER-master" "$CLUSTER-worker"; do
  az network vnet subnet delete -g "$RESOURCEGROUP" --vnet-name vnet -n "$subnet"
done