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Managing Fuse

Red Hat Fuse 7.0

Managing Fuse applications with Hawtio and Prometheus

Fuse Documentation Team

Abstract

When you deploy a Fuse application, you can use both the Fuse Console (Hawtio) and Prometheus to monitor and interact with Red Hat Fuse integrations.

Preface

Red Hat Fuse provides two enterprise monitoring tools for viewing and managing Fuse integrations:

  • The Fuse Console is a web-based console that you access from a browser to monitor and manage a running Fuse container. The Fuse Console is based on Hawtio open source software (http://hawt.io/).
  • Prometheus (https://prometheus.io/docs/introduction/overview/) stores system and integration-level metrics for Fuse distributions. You can use a graphical analytics interface, such as Grafana, to view and analyze the stored historical data.

The audience for this guide is Red Hat Fuse administrators. This guide assumes that you are familiar with the Red Hat Fuse platform, Apache Camel, and the processing requirements for your organization.

When you deploy a Fuse application, you can use both the Fuse Console (Hawtio) and Prometheus to monitor and interact with Red Hat Fuse integrations.

Fuse Console

The Fuse Console provides a central interface to examine and manage the details of one or more deployed Fuse containers. You can also monitor Red Hat Fuse and system resources, perform updates, and start or stop services.

The Fuse Console is available when you install Red Hat Fuse standalone or use Fuse on OpenShift. The integrations that you can view and manage in the Fuse Console depend on the plugins that are running. Possible plugins include:

  • Camel
  • JMX
  • Spring Boot
  • OSGI
  • Runtime
  • Logs

The Fuse Console is a web-based console. For a list of supported browsers, go to https://access.redhat.com/articles/310603.

Prometheus

Prometheus is container-native software built for storing historical data and for monitoring large, scalable systems of which Fuse on OpenShift is a component. It gathers data over an extended time, rather than just for the currently running session.

Part I. Accessing the Fuse Console

How you access the Fuse Console depends on your Fuse distribution:

Chapter 1. Accessing the Fuse Console on OpenShift

Note

Security and user management for the Fuse Console is handled by OpenShift. Role-based access control is not yet available for Fuse on OpenShift.

For a Fuse on OpenShift distribution, deploy the Fuse Console using the corresponding OpenShift template.

1.1. OpenShift templates for Fuse Console

Table 1.1, “Fuse Console templates” describes the two OpenShift templates that you can use to access the Fuse Console, depending on the type of Fuse application deployment.

Table 1.1. Fuse Console templates
TypeTemplateDescription

cluster

fis-console-cluster-template.json

Use an OAuth client that requires the cluster-admin role to be created. The Fuse Console can discover and connect to Fuse applications deployed across multiple namespaces or projects.

namespace

fis-console-namespace-template.json

Use a service account as OAuth client, which only requires the admin role in a project to be created. This restricts the Fuse Console access to this single project, and as such acts as a single tenant deployment.

Optionally, you can view a list of the template parameters by running the following command: 

oc process --parameters -f fis-console-namespace-template.json

1.2. Deploying the Fuse Console on your OpenShift cluster

You can deploy the Fuse Console from the OpenShift Console or from the command line.

1.2.1. Using the OpenShift Console

To deploy the Fuse Console on your OpenShift cluster, follow these steps (where myproject is the name of your project):

  1. If the Fuse Console templates are not already installed on OpenShift, run the following command to create the template as a resource in OpenShift: 

    oc create -n openshift -f https://raw.githubusercontent.com/jboss-fuse/application-templates/application-templates-2.1.fuse-000099-redhat-5/fis-console-namespace-template.json
  2. In the OpenShift console, select Add to Project → Select from Project to see the Fuse Console template.

1.2.2. Using the command line

To deploy the Fuse Console from the command line:

  1. Create a new application based on a Fuse Console template by running one of the following commands (where myproject is the name of your project):

    • For the Fuse Console cluster template, where myhost is the hostname: 

      oc new-app -n myproject -f https://raw.githubusercontent.com/jboss-fuse/application-templates/application-templates-2.1.fuse-000099-redhat-5/fis-console-cluster-template.json -p ROUTE_HOSTNAME=myhost

    • For the Fuse Console namespace template: 

      oc new-app -n myproject -f https://raw.githubusercontent.com/jboss-fuse/application-templates/application-templates-2.1.fuse-000099-redhat-5/fis-console-namespace-template.json
      Note
      You can omit the ROUTE_HOSTNAME parameter for the *namespace* template because OpenShift automatically generates one.

  2. Obtain the status of your deployment by running this command: 

    oc status

    Here is an example response: 

    In project myproject on server https://192.168.64.12:8443
https://fuse-console.192.168.64.12.nip.io (redirects) (svc/fuse70-console-service)
dc/fuse70-console deploys openshift/jboss-fuse70-console:1.0
deployment #1 deployed 2 minutes ago - 1 pod
  3. To access the Fuse Console from a browser, use the provided URL (for example, https://fuse-console.192.168.64.12.nip.io).

Chapter 2. Accessing the Fuse Console for Spring Boot standalone

To access the Fuse Console for a standalone Fuse Spring Boot distribution:

  1. Add hawtio-springboot to your Fuse application’s pom.xml file dependencies. 

    <dependency>
  <groupId>io.hawt</groupId>
  <artifactId>hawtio-springboot</artifactId>
</dependency>

    Note that you do not need to specify the version because it is provided by the Maven BOM.

  2. Edit the src/main/resources/application.properties file and set endpoints.jolokia.sensitive to false: 

    endpoints.jolokia.sensitive = false

  3. Run the Fuse application by using the following command: 

    mvn spring-boot:run

  4. To determine the port number for the Fuse Console URL, obtain the management.port value by looking at the value set in the src/main/resources/application.properties file. For example: 

    management.port   = 10001

  5. To open the Fuse Console in a browser, use the following URL syntax where nnnnn is the value of the management.port property:

    http://localhost:nnnnn/hawtio/index.html

    For example: http://localhost:10001/hawtio/index.html

Chapter 3. Accessing the Fuse Console for JBoss EAP

Before you can access the Fuse Console for Red Hat JBoss Enterprise Application Platform, you must install Fuse on the JBoss EAP container. For step-by-step instructions, see Installing on JBoss EAP.

To access the Fuse Console for a standalone JBoss EAP distribution:

  1. Start Red Hat Fuse standalone with the following command:

    On Linux/Mac OS: ./bin/standalone.sh

    On Windows: ./bin/standalone.bat

  2. In a web browser, enter the URL to connect to the Fuse Console. For example: http://localhost:8080/hawtio
  3. In the login page, enter your user name and password and then click Log In.

By default, the Fuse Console shows the Home page. The left navigation tabs indicate the running plugins.

3.1. Resolving delayed Fuse Console loading

If the main Fuse Console page takes a long time to display in the browser, you might need to reduce the number and the size of the log files. You can use the periodic-size-rotating-file-handler to rotate the file when it reaches a maximum size (rotate-size) and maintains a number of files (max-backup-index). For details on how to use this handler, see the Red Hat JBoss Enterprise Application Platform product documentation.

Chapter 4. Accessing the Fuse Console for Karaf

To access the Fuse Console for Apache Karaf standalone:

  1. Install Fuse on the Karaf container. For step-by-step instructions, see Installing on Apache Karaf.

  2. In the command line, navigate to the directory in which you installed Red Hat Fuse and run the following command to start Fuse standalone: 

    ./bin/fuse

    The Karaf console starts and shows version information, the default Fuse Console URL, and a list of common commands.

  3. In a browser, enter the URL to connect to the Fuse Console. For example: http://localhost:8181/hawtio
  4. In the login page, enter your user name and password and then click Log In.

By default, the Fuse Console shows the Home page. The left navigation tabs indicate the running plugins.

4.1. Securing Fuse containers on Karaf

You can implement the following security features to secure Fuse containers on Apache Karaf:

  • Enable SSL/TLS security
  • Configure user authorization

4.1.1. Enabling SSL/TLS security

SSL/TLS security is not enabled by default for the Fuse Console. It is recommended that you enable SSL/TLS security on the Fuse Console to protect username/password credentials from snooping. For detailed instructions on how to enable SSL/TLS security, see the Security Guide.

4.1.2. Controlling user access to the Fuse Console

Note

For this release, role-based access control for the Fuse Console is only enabled for Fuse on Karaf standalone.

The operations that an authenticated user are allowed to perform depend on the role (or roles) assigned to that user, as listed in Table 4.1, “Role-based access on Karaf standalone”.

Ensure that you have the necessary user role authorization to perform the Fuse Console operations that you want to perform.

To set a user role:

  1. Open the Red Hat Fuse etc/users.properties file in an editor.

  2. Add an entry for the user name, password, and role.

    For example, the following entry in the etc/users.properties file defines the admin user and grants the admin role. 

    admin = secretpass,admin
  3. Save the file.
Table 4.1. Role-based access on Karaf standalone
Operationadminmanagerviewer

login/logout

Y

Y

Y

View Help topics

Y

Y

Y

Set user preferences

Y

Y

Y

Connect

   

Discover and connect to remote integrations

Y

Y

Y

Discover and connect to local integrations

Y

Y

Y

Camel

   

View all running Camel applications

Y

Y

Y

Start, suspend, resume, and delete Camel Contexts

Y

Y

N

Send messages

Y

Y

N

Add endpoints

Y

Y

N

View routes, route diagrams, and runtime statistics

Y

Y

Y

Start and stop routes

Y

Y

N

Delete routes

Y

Y

N

JMX

   

Change attribute values

Y

Y

N

Select and view attributes in a time-based chart

Y

Y

Y

View operations

Y

Y

Y

OSGI

   

View bundles, features, packages, services, servers, framework, and configurations

Y

Y

Y

Add and delete bundles

Y

Y

N

Add configurations

Y

Y

N

Install and uninstall features

Y

Y

N

Runtime

   

View system properties, metrics, and threads

Y

Y

Y

Logs

   

Viewing logs

Y

Y

Y

For more information on role-based access control, see Deploying into Apache Karaf.

Chapter 5. Disabling the Fuse Console

How you disable the Fuse Console depends on your Fuse distribution.

5.1. Karaf

To disable the Fuse Console on Karaf so that it becomes inaccessible to all users without affecting any other component, follow these steps:

  1. To determine the hawtio-web bundle ID, use the following command to list the Fuse bundles that the Fuse Console uses:

    osgi:list | grep hawtio

  2. To stop the bundle, use the osgi:stop command. For example, if the hawtio :: Web console bundle has an ID of 246, type this command:

    osgi:stop 246

The bundle goes into the resolved state and you can no longer access the Fuse Console.

For more information about managing bundles, see the "Lifecycle Management" chapter of Deploying into Apache Karaf.

5.2. JBoss EAP

To disable the Fuse Console on JBoss EAP, do one of the following:

  • Remove the deployment file: $EAP_HOME/standalone/deployments/hawtio-wildfly-xxxxx.war
  • Undeploy the Fuse Console by using the JBoss EAP admin console or command line interface.

5.3. Spring Boot

For Spring Boot, the Fuse Console is not enabled by default.

5.4. OpenShift

For OpenShift, the Fuse Console is not enabled by default.

Part II. Viewing and managing Fuse applications

Chapter 6. Viewing containers and applications (Fuse on OpenShift)

When you login to the Fuse Console for OpenShift, the Fuse Console home page shows the available containers.

To manage (create, edit, or delete) containers, use the OpenShift console.

To view Fuse applications on the OpenShift cluster, click the Online tab.

Chapter 7. Connecting to remote Fuse integrations (standalone distributions)

The Fuse Console uses Jolokia, an agent-based approach to Java Management Extensions (JMX) that requires extra software (an agent) installed on the client. By default, Red Hat Fuse includes a jolokia agent.

With standalone Fuse Console distributions, you can connect to remote integrations that already have a jolokia agent (https://jolokia.org/) running inside them. If the process that you want to connect to does not have a jolokia agent inside, refer to the jolokia documentation (http://jolokia.org/agent.html).

7.1. Unlocking the Fuse Console

By default, Jolokia for Fuse 7 standalone (on Apache Karaf} and JBoss EAP) is locked and the Fuse Console is not accessible remotely.

To unlock the Fuse Console for a hostname or IP address other than locahost or 127.0.0.1, follow these steps:

  1. Open the jolokia-access.xml` file in an editor.

    On Karaf, the XML file is located in the $KARAF_HOME/etc folder.

    On JBoss EAP, it is located in the $EAP_HOME/standalone/configuration folder.

  2. Register the hostnames or IP addresses for the Fuse integrations that you want to access with the Fuse console by adding them to the <cors> section.

    For example, to access hostname 0.0.0.3 from the Fuse Console, add the <allow-origin>http://0.0.0.3:*</allow-origin> line as shown: 

    <!--

  Cross-Origin Resource Sharing (CORS) restrictions

  By default, only CORS access within localhost is allowed for maximum security.

  You can add trusted hostnames in the <cors> section to unlock CORS access from them.

  -->

  <cors>

    <!-- Allow cross origin access only within localhost -->

    <allow-origin>http*://localhost:*</allow-origin>

    <allow-origin>http*://127.0.0.1:*</allow-origin>

    <allow-origin>http://0.0.0.3:*</allow-origin>

    <!-- Whitelist the hostname patterns as <allow-origin> -->

    <!--

    <allow-origin>http*://*.example.com</allow-origin>

    <allow-origin>http*://*.example.com:*</allow-origin>

    -->

    <!-- Check for the proper origin on the server side to protect against CSRF -->

    <strict-checking />

  </cors>
  3. Save the file.

7.2. Allowing connections to remote Fuse instances

The Fuse Console’s proxy servlet uses whitelist host protection, with which by default the Fuse Console can only connect to localhost. If you want to connect the Fuse Console to other remote Fuse instances, you need to configure the whitelist as follows:

  • For Apache Karaf, make the following configuration changes in etc/system.properties file: 

    hawtio.proxyWhitelist = localhost, 127.0.0.1, myhost1, myhost2, myhost3

  • For JBoss EAP, make the following configuration changes in the standalone/configuration/standalone-*.xml file: 

     <property name=hawtio.proxyWhitelist" value="localhost, 127.0.0.1, myhost1, myhost2, myhost3"/>

  • For Spring Boot, configure the hawtio.proxyWhitelist system property in the main() method of your Spring Boot application: 

    System.setProperty("hawtio.proxyWhitelist", "localhost, 127.0.0.1, myhost1, myhost2, myhost3");

7.3. Connecting to a remote Jolokia instance

Before you begin, you need to know the host name, port, and path of the jolokia agent to be able to connect.

To connect to a remote Jolokia instance so that you can examine its JVM:

  1. Click the Connect tab.

  2. Click the Remote tab, and then Add connection.

    mf add connection
  3. Type the Name, Scheme (HTTP or HTTPS), and the hostname.
  4. Click Test Connection.
  5. Click Add.
Note

The Fuse Console automatically probes the local network interfaces other than localhost and 127.0.0.1 and adds them to the whitelist. Hence, you do not need to manually register the local machine’s addresses to the whitelist.

7.4. Setting data moving preferences

You can change the following Jolokia preferences, for example, if you want to more frequently refresh data that displays in the Fuse Console. Note that increasing the frequency of data updates impacts networking traffic and increases the number of requests made to the server.

  • Update rate - The period between polls to Jolokia to fetch JMX data (the default is 5 seconds).
  • Maximum depth - The number of levels that Jolokia will marshal an object to JSON on the server side before returning (the default is 7).
  • Maximum collection size - The maximum number of elements in an array that Jolokia marshals in a response (the default is 50,000).

To change the values of these settings:

  1. In the upper right of the Fuse Console, click the user icon and then click Preferences.

    mf preferences
  2. Edit the options and then click Close.

7.5. Viewing JVM runtime information

To view JVM runtime information, such as system properties, metrics, and threads, click the Runtime tab.

Chapter 8. Viewing and managing Apache Camel applications

In the Fuse Console’s Camel tab, you view and manage Apache Camel contexts, routes, and dependencies.

8.1. Overview

The Camel tab is only available when you connect to a container that uses one or more Camel routes.

You can view the following details:

  • A list of all running Camel contexts
  • Detailed information of each Camel context such as Camel version number and runtime statics
  • Lists of all routes in each Camel application and their runtime statistics
  • Graphical representation of the running routes along with real time metrics

You can also interact with a Camel application by:

  • Starting and suspending contexts
  • Managing the lifecycle of all Camel applications and their routes, so you can restart, stop, pause, resume, etc.
  • Live tracing and debugging of running routes
  • Browsing and sending messages to Camel endpoints

8.2. Interacting with a Camel application

To start, suspend, or delete a context:

  1. In the Camel tab’s tree view, click Camel Contexts.
  2. Check the box next to one or more contexts in the list.
  3. Click Start or Suspend.
  4. To delete a context, you must first stop it. Then click the ellipse icon and select Delete from the dropdown menu.
Note

When you delete a context, you remove it from the deployed application.

To view Camel application details:

  1. In the Camel tab’s tree view, click a Camel application.
  2. To view a list of application attributes and values, click Attributes.

  3. To view a graphical representation of the application attributes::

    1. Click Chart.
    2. Click Edit to select the attributes that you want to see in the chart.
  4. To view inflight and blocked exchanges, click Exchanges.
  5. To view application endpoints, click Endpoints. You can filter the list by URL, Route ID, and direction.
  6. Click Type Converters to view, enable, and disable statistics related to the Camel built-in type conversion mechanism, that is used to convert message bodies and message headers to different types.
  7. Click Operations to view and execute JMX operations, such as adding or updating routes from XML or finding all Camel components available in the classpath.

To interact with Camel routes:

  1. In the Camel tab’s tree view, click the application’s routes folder to view a list of the routes:

    mf list of routes

  2. To start, stop, or delete one or more routes:

    1. Check the box next to one or more routes in the list.
    2. Click Start or Stop.

    3. To delete a route, you must first stop it. Then click the ellipse icon and select Delete from the dropdown menu.

      mf delete route
      Note
      • When you delete a route, you remove it from the deployed application.
      • You can also select a specific route in the tree view and then click the upper-right menu to start, stop, or delete it.
  3. To view a graphical diagram of the routes, click Route Diagram.
  4. To view inflight and blocked exchanges, click Exchanges.
  5. To view endpoints, click Endpoints. You can filter the list by URL, Route ID, and direction.
  6. Click Type Converters to view, enable, and disable statistics related to the Camel built-in type conversion mechanism, which is used to convert message bodies and message headers to different types.

To interact with a specific route:

  1. In the Camel tab’s tree view, select a route.
  2. To view a list of route attributes and values, click Attributes.
  3. To view a graphical representation of the route attributes, click Chart. You can click Edit to select the attributes that you want to see in the chart.
  4. To view inflight and blocked exchanges, click Exchanges.
  5. Click Operations to view and execute JMX operations on the route, such as dumping the route as XML or getting the route’s Camel ID value.

To trace messages through a route:

  1. In the Camel tab’s tree view, select a route.
  2. Select Trace, and then click Start tracing.

  3. To send messages to a route:

    1. In the Camel tab’s tree view, open the context’s endpoints folder and then select an endpoint.
    2. Click the Send subtab.
    3. Configure the message in JSON or XML format.
    4. Click Send.
  4. Return to the route’s Trace tab to view the flow of messages through the route.

To debug a route:

  1. In the Camel tab’s tree view, select a route.
  2. Select Debug, and then click Start debugging.

  3. To add a breakpoint, select a node in the diagram and then click Add breakpoint. A red dot appears in the node:

    mf breakpoint

    The node is added to the list of breakpoints:

    mf breakpointlist
  4. Click the down arrow to step to the next node or the Play button to resume running the route.
  5. Click the Pause button to suspend all threads for the route.
  6. Click Stop debugging when you are done. All breakpoints are cleared.

Chapter 9. Viewing and managing JMX domains and MBeans

Java Management Extensions (JMX) is a Java technology that allows you to manage resources (services, devices, and applications) dynamically at runtime. The resources are represented by objects called MBeans (for Managed Bean). You can manage and monitor resources as soon as they are created, implemented, or installed.

With the JMX plugin on the Fuse Console, you can view and manage JMX domains and MBeans. You can view MBean attributes, run commands, and create charts that show statistics for the MBeans.

The JMX tab provides a tree view of the active JMX domains and MBeans organized in folders. You can view details and execute commands on the MBeans.

To view and edit MBean attributes:

  1. In the tree view, select an MBean.
  2. Click the Attributes tab.
  3. Click an attribute to see its details.

To perform operations:

  1. In the tree view, select an MBean.
  2. Click the Operations tab, expand one of the listed operations.
  3. Click Execute to run the operation.

To view charts:

  1. In the tree view, select an item.
  2. Click the Chart tab.

Chapter 10. Viewing and managing your OSGI environment (Karaf standalone)

For Apache Karaf standalone distributions, you can view and manage the Red Hat Fuse OSGi environment. You can view and manage container bundles, features, and configurations, as well as Java packages and OSGi services.

The OSGi tab contains a series of subtabs with options for each container component:

Bundles
List of installed bundles. You can install and uninstall bundles, start and stop bundles, and edit bundle properties. You can also filter the list and toggle between list and grid view.
Features
List of available features. You can install and uninstall features or feature repositories, and drill down to view feature details.
Packages
List of installed Java packages. You can view package versions and associated bundles.
Services
List of running services. You can view service IDs, associated bundles and object classes.
Declarative Services
List of declarative OSGi services. You can view the service state and drill down to view service details. You can also activate and deactivate services.
Server
Detailed information about the local or remote host in read-only mode.
Framework
Configuration options for the container OSGi framework. You can set the framework start level and the initial bundle start level.
Configuration
List of configuration objects. You can view the state of each object and drill down to view or edit object details. You can also create a new configuration object.

10.1. Viewing and monitoring thread state

To view and monitor the state of threads:

  1. Click the Runtime tab and then the Threads subtab. The Threads page lists active threads and stack trace details for each thread. By default, the thread list shows all threads in descending ID order.
  2. To sort the list by increasing ID, click the ID column label.
  3. Optionally, filter the list by thread state (for example, Blocked) or by thread name.
  4. To drill down to detailed information for a specific thread, such as the lock class name and full stack trace for that thread, in the Actions column, click More.

Chapter 11. Viewing log entries

You can view log entries for Red Hat Fuse in the Logs tab. The Logs tab is available (for Fuse standalone on Karaf and Fuse standalone on JBoss EAP) when the Java application has the Log MBean available .

You can filter the list of logs to show specific log types, and drill down to each log entry to view detailed information about the log entry.

The Logs tab contains the following sections:

Action Bar
Options to filter the log entries section according to a text string or the logging level.
Log Entries
List view of the log entries. By default, the list shows log entries in ascending order. You can change the default sorting in the User → Preferences → Server Logs page. Click the log entry link to drill down to details about the log entry, such as the bundle name, thread, and the full message text.

11.1. Setting Fuse Console log attributes

You can customize the following Fuse Console browser settings for storing log messages:

  • The number of log statements to keep in the Fuse Console (the default is 100).
  • The global log level: INFO (the default), OFF, ERROR, WARN, and DEBUG.
  • The child-level Hawtio messages to include, such as hawtio-oauth and hawtio-core-utils.

To change the defaults:

  1. In the upper right corner of the Fuse Console, click the user icon and then click Preferences from the drop-down menu:

    mf preferences
  2. Edit the options and then click Close.

To reset the Console Logs settings to the default values, click Reset → Reset settings.

Chapter 12. Changing the Fuse Console branding

To change the branding name and image for the Fuse Console, you can edit the following files:

  • The hawtconfig.json file in the Fuse Console’s war file (karaf-install-dir/system/io/hawt/hawtio-war/version/hawtio-war-version.war): 

    {
  "branding": {
    "appName": "Hawtio Management Console",
    "appLogoUrl": "img/hawtio-logo.svg",
    "companyLogoUrl": "img/hawtio-logo.svg"
  },
  "about": {
    "title": "Hawtio Management Console",
    "productInfo": [],
    "additionalInfo": "",
    "copyright": "",
    "imgSrc": "img/hawtio-logo.svg"
  },
  "disabledRoutes": []
}
  • The war file’s style sheet (.css) file to modify other aspects of the Fuse Console UI.
Note

If you have already run the Fuse Console in a web browser, the branding is stored in the browser’s local storage. To use new branding settings, you must clear the browser’s local storage.

Chapter 13. Ensuring that data displays correctly in the Fuse Console

If the display of the queues and connections in the Fuse Console is missing queues, missing connections, or displaying inconsistent icons, adjust the Jolokia collection size parameter that specifies the maximum number of elements in an array that Jolokia marshals in a response.

  1. In the upper right corner of the Fuse Console, click the user icon and then click Preferences.

    mf preferences
  2. Increase the value of the Maximum collection size option (the default is 50,000).
  3. Click Close.

Part III. Accessing Prometheus

Note

For this release, Prometheus is only supported for Fuse on OpenShift. For documentation about Prometheus on OpenShift Container Platform, go to: https://access.redhat.com/documentation/en-us/openshift_container_platform/3.9/html/installation_and_configuration/install-config-cluster-metrics#openshift-prometheus

Important

Prometheus on OpenShift Container Platform is a Technology Preview feature only. Technology Preview features are not supported with Red Hat production service level agreements (SLAs), might not be functionally complete, and Red Hat does not recommend to use them for production. These features provide early access to upcoming product features, enabling customers to test functionality and provide feedback during the development process.

For more information on Red Hat Technology Preview features support scope, see https://access.redhat.com/support/offerings/techpreview/.

You can use Prometheus to monitor and store Fuse on OpenShift data by exposing an endpoint with your Fuse application’s data to Prometheus format. Prometheus stores the data so that you can use a graphical tool, such as Grafana, to visualize and run queries on the data.

1. OpenShift setup

To use Prometheus to monitor Fuse on OpenShift you must:

  • Install the Ansible Service Broker (ASB), which requires OpenShift v3.9 or later. To install the Ansible Service Broker, follow the instructions here: https://github.com/openshift/ansible-service-broker
  • When you start OpenShift, use the --service-catalog option.

2. Installing Prometheus

The Ansible Playbook Bundle uses an image of Prometheus: https://github.com/ansibleplaybookbundle/prometheus-apb

  1. To install the Ansible Playbook Bundle (APB), run these commands: 

    wget https://raw.githubusercontent.com/openshift/ansible-service-broker/master/
           scripts/run_latest_build.sh

chmod +x run_latest_build.sh

./run_latest_build.sh

  2. To give the developer account permissions to install, run the following commands: 

    oc create -n ansible-service-broker -f https://raw.githubusercontent.com/ansibleplaybookbundle/ansible-playbook-bundle/apb-1.1.6-1/templates/openshift-permissions.template.yaml
    oc export cm/broker-config -n ansible-service-broker | sed 's/sandbox_role: .*/sandbox_role: \"admin\"/' | oc replace -f - cm/broker-config -n ansible-service-broker

    The Prometheus APB should appear.

  3. Follow the provided instructions. Optionally, you can install Grafana.

For information about getting started with Prometheus, go to: https://prometheus.io/docs/prometheus/latest/getting_started/

3. Configuring Prometheus

You can set the following environment variables in OpenShift in order to configure your application’s Prometheus agent:

Table 3. Prometheus Environment Variables
Environment VariableDescriptionDefault

AB_PROMETHEUS_HOST

The host address to bind.

0.0.0.0

AB_PROMETHEUS_OFF

If set, disables the activation of Prometheus (echoes an empty value).

Prometheus is enabled.

AB_PROMETHEUS_PORT

The Port to use.

9779

AB_JMX_EXPORTER_CONFIG

Uses the file (including path) as the Prometheus configuration file.

The /opt/prometheus/prometheus-config.yml file with Camel metrics

AB_JMX_EXPORTER_OPTS

Additional options to append to the JMX exporter configuration.

Not applicable.

4. Controlling the metrics that Prometheus monitors and collects

By default, Prometheus uses a configuration file ( https://raw.githubusercontent.com/jboss-fuse/application-templates/master/prometheus/prometheus-config.yml) that includes all possible metrics exposed by Camel.

If you have custom metrics within your application that you want Prometheus to monitor and collect (for example, the number of orders that your application processes), you can use your own configuration file. Note that the metrics that you can identify are limited to those supplied in JMX.

To use a custom configuration file to expose JMX beans that are not covered by the default configuration, follow these steps:

  1. Create a custom Prometheus configuration file. You can use the contents of the default file (prometheus-config.yml https://raw.githubusercontent.com/jboss-fuse/application-templates/master/prometheus/prometheus-config.yml) as a guide for the format.

    You can use any name for the custom configuration file, for example: my-prometheus-config.yml

  2. Add your prometheus configuration file (for example, my-prometheus-config.yml) to your application’s src/main/fabric8-includes directory.

  3. Create a src/main/fabric8/deployment.xml file within your application and add an entry for the AB_JMX_EXPORTER_CONFIG environment variable with its value set to your configuration file. For example: 

    env:
    name: AB_JMX_EXPORTER_CONFIG
value: “my-prometheus-config.yml”

    This environment variable applies to your application at the pod level.

  4. Rebuild and deploy your application.

5. Viewing Prometheus metrics with Grafana

Grafana is an analytics platform that allows you to query, visualize, alert on and understand your metrics using dashboards.

To view Prometheus metrics with Grafana, you need to:

6. Generating alerts

For an example of using Prometheus for OpenShift to generate alerts, see the Red Hat Cloud Forms Monitoring, Alerts, and Reporting guide:

https://access.redhat.com/documentation/en-us/red_hat_cloudforms/4.6/html/monitoring_alerts_and_reporting/integrating_prometheus_alerts

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