A simple apb example designed to showcase the creation of an apb instanciating ressources in two namespaces.

In this example, we will create a servicemonitor object in a namespace with an operator-deployed prometheus.

The goal is to showcase how an apb can be used to auto register an application with a prometheus in order to gather metrics.

• oc client
• Openshift with a prometheus deployed via the prometheus operator in this scenario, the namespace is named app-monitoring

Create a new namespace

oc new-project simple-apb

Allow all namespaces to pull images from the apb namespace

oc adm policy add-role-to-group system:image-puller system:serviceaccounts -n simple-apb 

Build the sample application image in the simple-apb namespace This image is a sample python project that will expose metrics on /metrics with two custom metrics ws_srv_func and ws_srv_is_now_even The source code is available at https://github.com/christophefarges/flask-prometheus-ex

oc create -f sample-image

Configure the ansible-service-broker with the following

• set the role as admin as we will create a role in the namespace

    openshift:
        ...
        sandbox_role: admin

• add the following registry to the ansible-service-broker

    registry:
    -   name: localregistry
        namespaces:
        - simple-apb
        type: local_openshift
        white_list:
        - .*-apb

build the apb in this project

oc new-build --binary=true --name simple-apb -n simple-apb

oc start-build --follow --from-dir . simple-apb -n simple-apb

Allow all the serviceaccounts to create servicemonitors objects in the app-monitoring namespace

oc create clusterrole service-monitor-editor --verb=get,create,update,delete --resource=servicemonitors.monitoring.coreos.com -n app-monitoring                                                                                              ⏎
oc adm policy add-cluster-role-to-group service-monitor-editor system:serviceaccounts -n app-monitoring

Create a new simple-apb application from the service catalog, enable the monitoring and specify the namespace where prometheus in running (app-monitoring by default)

BSD