Java Agent

CloudWisdom’s Java agent is a java monitoring agent with a programmable bytecode instrumentation engine that’s enabled by adding a JVM integration in CloudWisdom. The CloudWisdom Java integration allows CloudWisdom to collect JVM runtime system metrics like CPU, Memory, GC, Threads and Classes Count, and application components method performance statistics, such as number of calls and execution time.

Prerequisites

Must have Java 6 Or greater.

Configuration

1. Copy API key

  1. From the left navigation menu, select Integrations.
  2. Select the Java card. The name should be already populated, and Data Collection should be enabled. A unique API key for your account has already been generated.
  3. Copy the API key.

2. Download the Netuitive Java agent

  1. Download the Netuitive Java agent.
  2. Unzip the netuitive-zorka.zip file to the desired location. We recommend that you unzip the netuitive-zorka.zip file near the app it is monitoring.

You can also use the following command to obtain the most recent version of the Java Agent:
curl -s https://api.github.com/repos/Netuitive/zorka/releases/latest | jq -r ".assets[] | .browser_download_url"

Edit Config File

  1. Navigate to the zorka.properties file that was included in the netuitive-zorka-{version}.zip.
  2. Enable the jvm.bsh script and any other scripts as necessary at the top of the file.
  3. Change zorka.hostname and zorka.application to the correct value. zorka.hostname should be the fully qualified domain name of the host and zorka.application should be the name of your Java application.
  4. Optionally, if you’re setting up the Java agent on JBoss, you should change the zorka.mbs.autoregister setting to no.
  5. Optionally, if you’d like the Zorka Log to be managed by the default syslog, change the zorka.syslog setting to yes. Read more about the zorka.syslog setting here.
  6. Optionally, if you want Zorka to monitor clusters:
    • Uncomment zorka.clusters in the zorka.properties file and include the name of each element. The default setting (cluster 1, cluster 2) would create a JVM () element and two CLUSTER () elements with the names cluster1 and cluster2.
    • zorka.clusters = cluster1, cluster2
    • If you want to specify the element type of the clusters, uncomment zorka.clusters.type and change the setting to the desired element type. If the type is not specified, the default is CLUSTER.
    • zorka.clusters.type = CLUSTER
  7. Change the netuitive.api.key value to the unique API key generated for your account that you copied in step 1.
  8. Ensure the netuitive.api value is set to yes to enable data push to CloudWisdom.
  9. Modify the netuitive.api.interval value to the desired data push interval (in seconds). The agent will collect data at the desired interval but aggregate the values each minute and send a single set of values to the API. Data is sent as statistics (min, max, sum, avg, and count) instead of raw values. Data in the Metrics pagefor your JVM metrics is displayed using gauges instead of a counter to capture any delta between data points.
  10. Restart your app server with the following argument passed to the JVM (where the default path to the Netuitive Java agent unzipped directory is /opt/netuitive-zorka/):
 -javaagent:[path-to-netuitive-zorka-unzipped-dir]/netuitive.jar=[path-to-netuitive-zorka-unzipped-dir]

This integration’s package (computed metrics, dashboards, and policies that will give you important events and alerts) will be automatically enabled and provisioned to your account as soon as CloudWisdom receives data from the integration. The PACKAGES button on the integration setup page will become active once data is received, so you’ll be able to disable and re-enable the package at will.

Examples

We want to run the java application zorka-core-test.jar with our Java agent specified in the -javaagent JVM option.

 java -javaagent:/opt/netuitive-zorka/netuitive.jar=/opt/netuitive-zorka -jar zorka-core-test.jar