Integration with OpenShift Container Platform

Red Hat CloudForms 4.5

Adding Red Hat OpenShift Container Platform (with Metrics Enabled) as a Container Provider

Red Hat CloudForms Documentation Team

Abstract

This document provides a quick guide for integrating Red Hat OpenShift Container Platform container services (with metrics enabled) with Red Hat CloudForms. It is intended as an abridged reference for users already familiar with Red Hat CloudForms, Red Hat OpenShift Container Platform, and Red Hat Enterprise Linux.

Chapter 1. Overview

This guide walks you through adding a Red Hat OpenShift Container Platform cluster to a Red Hat CloudForms container provider catalog. This deployment focuses on enabling the OpenShift Container Platform cluster metrics plug-in, so that CloudForms can collect information from an OpenShift Container Platform cluster upon integration.

Each procedure in this guide is covered in greater detail in the Red Hat CloudForms and OpenShift Container Platform product documentation. However, links to the corresponding sections are provided for more detail.

The following sections will describe the required configuration for both products prior to integration.

Chapter 2. Prerequisites

This guide assumes that you have:

When enabling metrics on OpenShift Container Platform, you can store your metrics data on persistent or non-persistent storage. To use persistent storage, you need to provision a persistent volume specifically for this purpose before configuring the metrics components. See Persistent Volumes in the OpenShift Container Platform Architecture documentation for more information.

Chapter 3. Enabling OpenShift Container Platform Metrics

In order for CloudForms to collect OpenShift Container Platform node, pod, and container, you must first enable cluster metrics for your OpenShift cluster. This involves running the OpenShift Metrics services inside your cluster. If cluster metrics are already enabled on OpenShift, skip this section and proceed to Chapter 4, Retrieving the OpenShift Container Platform Management Token.

Note

This section is an abridged version of a more detailed chapter, namely Enabling Cluster Metrics from the OpenShift Installation and Configuration documentation. Refer to that chapter for more information.

3.1. Configuring the Required Service Accounts

Cluster metrics requires the following service accounts:

  • metrics-deployer
  • heapster
Important

If you deployed OpenShift using openshift-ansible-3.0.20, then the service account and roles required for enabling metrics will already be installed. You can skip this section and go to Section 3.2, “Configuring Metrics Components”.

To create these accounts:

  1. Log in as an administrator to any node within the OpenShift Container Platform cluster.
  2. Open a terminal.

  3. Switch to the openshift-infra project: 

    $ oc project openshift-infra

  4. Create a service account for the Metrics Deployer named metrics-deployer: 

    $ oc create -f - <<API
  apiVersion: v1
  kind: ServiceAccount
  metadata:
    name: metrics-deployer
  secrets:
  - name: metrics-deployer
  API

  5. As described in Section 3.2, “Configuring Metrics Components”, the Metrics Deployer uses the metrics-deployer service account. Configure the metrics-deployer account to have edit permissions in the openshift-infra project: 

    $ oadm policy add-role-to-user \
    edit system:serviceaccount:openshift-infra:metrics-deployer

  6. The heapster account will be automatically created in Section 3.2.1, “Deploying the Metrics Components”. However, pre-emptively grant it cluster-reader permission to the openshift-infra project: 

    $ oadm policy add-cluster-role-to-user \
    cluster-reader system:serviceaccount:openshift-infra:heapster

3.2. Configuring Metrics Components

The Metrics Deployer installs and configures the components required for OpenShift Container Platform metrics. By default, the Metrics Deployer uses self-signed certificates to secure communication between components. This document assumes that you will use this default. For information on alternative secure communication configurations, see Using Secrets in the OpenShift Container Platform Installation and Configuration documentation.

Note

This section is an abridged version of a more detailed chapter, namely Metrics Data Storage in the OpenShift Container Platform Installation and Configuration documentation. Refer to that chapter for more information on how to deploy the metrics plug-in using persistent and non-persistent storage.

3.2.1. Deploying the Metrics Components

OpenShift Container Platform uses Hawkular Metrics as its metrics engine. The Metrics Deployer will install the Hawkular Metrics service; however, you need to provide the external hostname so that CloudForms can reach the Hawkular Metrics service. The base configuration of the Metrics Deployer is defined in the /usr/share/openshift/examples/infrastructure-templates/enterprise/metrics-deployer.yaml file.

Before deploying OpenShift metrics, choose a storage option, then log in as an administrator to any node within the OpenShift Container Platform cluster. From there, open a terminal and run the corresponding command:

Deploying with persistent storage

With persistent storage, OpenShift metrics will be stored on a persistent volume. This offers metrics data protection by allowing it to survive a pod recreation or restart. OpenShift metrics requires a specifically configured persistent volume; see Persistent Volumes in the OpenShift Container Platform Architecture documentation. 

$ oc new-app \
    -f /usr/share/openshift/examples/infrastructure-templates/enterprise/metrics-deployer.yaml \
    -p HAWKULAR_METRICS_HOSTNAME=HAWKULARHOST
Deploying with non-persistent storage

With non-persistent storage, any stored metrics will be deleted when the pod is deleted. While it is much easier to run cluster metrics with non-persistent data, it does come with the risk of permanent data loss. So, while you no longer need to provision and configure a volume to store metric data, this does not offer the same protection as persistent storage. 

$ oc new-app \
    -f /usr/share/openshift/examples/infrastructure-templates/enterprise/metrics-deployer.yaml \
    -p HAWKULAR_METRICS_HOSTNAME=HAWKULARHOST \
    -p USE_PERSISTENT_STORAGE=false

For either command, replace HAWKULARHOST with the external hostname that CloudForms will use to reach the Hawkular Metrics service. HAWKULARHOST must be a fully-qualified domain name.

Either storage method deploys the required metrics components and creates the necessary service accounts. In particular, the metrics components will be configured to also use the specified HAWKULARHOST as its public endpoint.

3.2.2. Applying the Hawkular Metrics Settings to OpenShift Container Platform

After deploying the metrics components, configure OpenShift Container Platform to use them:

  1. Open the OpenShift Master Configuration file at /etc/origin/master/master-config.yaml. Add the metricsPublicURL parameter to the assetConfig section, specifying the HAWKULARHOST you specified in Section 3.2.1, “Deploying the Metrics Components”: 

    assetConfig:
    ...
    metricsPublicURL: "https://HAWKULARHOST/hawkular/metrics"

  2. Restart your OpenShift Container Platform master host: 

    $ sudo systemctl restart atomic-openshift-master

Chapter 4. Retrieving the OpenShift Container Platform Management Token

After enabling cluster metrics on your OpenShift Container Platform deployment, retrieve the management token while you are still logged in to the OpenShift Container Platform host. This will be required later in Chapter 6, Adding OpenShift Container Platform as a Container Provider.

For OpenShift Container Platform 3.3 or later
Provide the token needed to add an OpenShift Container Platform 3.3 (or later) provider.

Run the following to obtain the token needed to add an OpenShift Container Platform 3.3 (or later) provider: 

# oc sa get-token -n management-infra management-admin
eyJhbGciOiJSUzI1NiI...
For OpenShift Enterprise 3.2
Provide the token needed to add an OpenShift Enterprise 3.2 provider.

Run the following to obtain the token needed to add an OpenShift Enterprise 3.2 provider: 

# oc sa get-token -n management-infra management-admin
eyJhbGciOiJSUzI1NiI...
For OpenShift Enterprise 3.1
Provide the token needed to add an OpenShift Enterprise 3.1 provider.

Run the following to obtain the token needed to add an OpenShift Enterprise 3.1 provider:

  1. Obtain the management service account token name: 

    # oc describe sa -n management-infra management-admin
...
Tokens:  management-admin-token-0f3fh
         management-admin-token-q7a87

  2. Select and describe one of the tokens to retrieve the full token output, replacing management-admin-token-0f3fh with the name of your token: 

    # oc describe secret -n management-infra management-admin-token-0f3fh
...
Data
====
token:  eyJhbGciOiJSUzI1NiI...

Chapter 5. Configuring Red Hat CloudForms

Configuring CloudForms involves two steps:

  1. Section 5.1, “Configuring CloudForms Capacity and Utilization”, and
  2. Section 5.2, “Enabling SmartState Analysis”

These steps are required to allow CloudForms to collect metrics from OpenShift Container Platform (Chapter 3, Enabling OpenShift Container Platform Metrics) and use them to perform a SmartState analysis. You can choose different servers to perform either function; the following sections assume that you will.

5.1. Configuring CloudForms Capacity and Utilization

For metrics collection to work properly, you also need to configure Red Hat CloudForms to allow for all three Capacity & Utilization server roles, which are available from the settings menu under Configuration → Server → Server Control. For more information on capacity and utilization collection, see Assigning the Capacity and Utilization Server Roles in the Deployment Planning Guide.

To enable these server roles:

  1. From the settings menu, select Configuration, then select the server to configure from Settings → Zone in the accordion menu on the left.

  2. Navigate to the Server Roles list in the Server → Server Control section. From there, set the required capacity and utilization roles to ON, namely:

    1. Capacity & Utilization Coordinator
    2. Capacity & Utilization Data Collector
    3. Capacity & Utilization Data Processor
  3. Click Save.

Data collection is enabled immediately. However, the first collection begins 5 minutes after the server is started, and every 10 minutes after that. Therefore, the longest the collection takes after enabling the Capacity & Utilization Collector role is 10 minutes. The first collection from a particular provider may take a few minutes since Red Hat CloudForms is gathering data points going one month back in time.

For more information, see the Capacity and Utilization Collection section in the Deployment Planning Guide.

5.2. Enabling SmartState Analysis

After enabling the required server roles, enable SmartState analysis. See Smart State Analysis Support from the Support Matrix and Running a SmartState Analysis in Managing Providers for more information.

Enabling SmartState analysis is similar to Section 5.1, “Configuring CloudForms Capacity and Utilization”, in that the procedure also involves enabling server roles on a specific server. To do so:

  1. From the settings menu, select Configuration.
  2. Select the server to configure from Settings → Zone in the left pane of the appliance.

  3. Navigate to the Server Roles list in the Server → Server Control section. From there, set the appropriate SmartState roles to ON. Namely:

    1. SmartProxy
    2. SmartState Analysis
  4. Click Save.
Important

CloudForms performs SmartState analysis on container providers by creating an OpenShift pod to run the SmartState process. When using a proxy to connect to outside resources, such as the image repository used by OpenShift, add the proxy credentials to the OpenShift pod as described in https://access.redhat.com/solutions/2915411.

Chapter 6. Adding OpenShift Container Platform as a Container Provider

At this point, you should now be ready to add your OpenShift cluster to Red Hat CloudForms as a container provider. To do so, prepare the token you retrieved in Chapter 4, Retrieving the OpenShift Container Platform Management Token and follow the procedure below:

  1. Navigate to Compute → Containers → Providers.
  2. Click 1847 (Configuration), then click 1862 (Add a New Containers Provider).
  3. Enter a Name for the provider.
  4. From the Type list, select OpenShift Container Platform.
  5. Enter the appropriate Zone for the provider. By default, the zone is set to default.
  6. In the Default tab of the Endpoints section, enter the fully qualified domain name of the provider in the Hostname (or IPv4 or IPv6 address) field.
  7. Enter the Port of the provider. The default port is 8443.
  8. In the Token and Confirm Token fields, enter token obtained earlier in Chapter 4, Retrieving the OpenShift Container Platform Management Token.
  9. Click Validate to confirm that the Red Hat CloudForms can connect to the OpenShift Container Platform provider using the provided token.
  10. Next, click the Hawkular tab. From there, enter the HAWKULARHOST (from Section 3.2.1, “Deploying the Metrics Components”) in the Hostname (or IPv4 or IPv6 address) field.
  11. Enter the Port of the HAWKULARHOST. The default port is 443.
  12. Click Add.

Chapter 7. Container Image Scanning

7.1. Configuring Image Scanning

Red Hat CloudForms manages vulnerability scanning of container images. When an OpenShift provider is added, OpenShift images from the internal registry are discovered. To enable image scanning, perform the following configuration steps:

  1. Navigate to Compute → Containers → Providers.
  2. Select the checkboxes of the OpenShift providers on which to enable scanning.
  3. From the Policy pull-down menu, click Manage Policies.
  4. Select the OpenSCAP profile checkbox.
  5. Click Save.

This action will trigger a SmartState analysis, or scan, of all images referenced by the OpenShift provider. The initial scan may take several hours to complete, depending on the number and size of images. OpenShift limits the number of scanning pods. Only three images can be scanned simultaneously.

7.2. Scheduling A Recurring Scan

Software vulnerability databases are updated frequently. To apply these updates, a rescan is required. To schedule a recurring scan of container images:

schedule openscap scan
  1. From the settings menu, select Configuration.
  2. From Settings → Zones in the left pane of the appliance, select Schedules.
  3. From the drop-down menu, click Configuration → Add a new Schedule.
  4. Type an arbitrary Name.
  5. Type an arbitrary Description.
  6. Ensure the Active checkbox is selected.
  7. In Action, select Container Image Analysis.
  8. In Filter, select All Container Images for Containers Provider, OpenShift.
  9. In Run, set the schedule as desired.
  10. Set the Time Zone, Starting Date, and Starting Time.
  11. Click Add.

7.3. Working with Images

7.3.1. Viewing Results

Image scanning results are displayed in each image summary page.

  1. Select Compute → Containers → Container Images.
  2. Click the desired image.

For an OpenSCAP HTML report, locate the Configuration section and select OpenSCAP HTML.

container configuration

For compliance and scanning history information, locate the Compliance section and note the Status field or select Available from the History field.

container scan history

7.3.2. Manual Scanning

SmartState analysis scanning may be initiated manually for images. From an image summary page, select Configuration → Perform SmartState Analysis. Refreshing the image page will reflect the latest scan results and compliance history.

7.3.3. Evaluating Compliance

If the image scan policy has been updated since the last scan, compliance conditions may be re-evaluated. From an image summary page, select Policy → Check Compliance of Last Known Configuration. Refreshing the image page will reflect the latest compliance history.

7.4. OpenSCAP Policy Profile

Red Hat CloudForms is pre-configured with a default scanning policy profile. This includes conditions to scan and identify compliance, as well as annotate compliance failure. SmartState analysis is performed when new images are added to OpenShift.

7.4.1. Customizing the Scanning Policy Profile

The default OpenSCAP policy profile cannot be edited. To customize scanning policy, copy the default profile as a starting point and edit.

  1. Navigate to Control → Explorer.
  2. Select Policy Profiles → All Policy Profiles → OpenSCAP Profile.
  3. Select Configuration → Copy this Policy Profile.

The copied profile can be edited as required. Be sure to assign the customized profile to the OpenShift provider.

7.5. Controlling OpenShift Pod Execution

Through the default policy profile, non-compliant images receive the control policy action Mark as Non-Compliant. This action annotates the image object (not to be confused with the imagestream object) with images.openshift.io/deny-execution=true. This annotation may be used to prevent nodes from running non-compliant images. Refer to OpenShift Image Policy documentation for configuration details.

7.6. Reference

More information about OpenSCAP, see visit the OpenSCAP web site.