coherence-operator

Access the EFK (Elasticsearch, Fluentd and Kibana) Stack to View Logs

The Coherence Operator (the “operator”) manages Oracle Coherence on Kubernetes. It manages monitoring data through Prometheus, and logging data through the EFK stack.

This use case is covered in the samples. Refer to the samples documentation. To access and configure the Kibana user interface(UI), follow the instructions:

Install the Charts

When you install the coherence-operator and coherence charts, you must specify the following option for helm for both charts. This ensures that the EFK stack is installed and correctly configured.

--set logCaptureEnabled=true

Port Forward Kibana

Once you have installed both charts, use the following script to port forward the Kibana port 5601:

Note: If your chart is installed in a namespace other than the default, then include the --namespace option for both kubectl commands.

#!/bin/bash
trap "exit" INT

POD=$(kubectl get pods --namespace namespace | grep kibana | awk '{print $1}')
while :
do
   kubectl port-forward $POD --namespace namespace 5601:5601
done

Default Dashboards

There are a number of dashboards created via the import process.

Coherence Operator

• Coherence Operator - All Messages - Shows all Coherence Operator messages

Coherence Cluster

• Coherence Cluster - All Messages - Shows all messages

• Coherence Cluster - Errors and Warnings - Shows only errors and warnings

• Coherence Cluster - Persistence - Shows persistence related messages

• Coherence Cluster - Partitions - Shows Ppartition related messages

• Coherence Cluster - Message Sources - Allows visualization of messages via the message source (Thread)

• Coherence Cluster - Configuration Messages - Shows configuration related messages

• Coherence Cluster - Network - Shows network related messages such as communication delays and TCP ring disconnects

Default Queries

There are many queries related to common Coherence messages, warnings and errors that are loaded and can be accessed via the discover side-bar.

Troubleshooting

No Default Index Pattern

There are two index patterns created via the import process and the coherence-cluster-* pattern will be set as the default. If for some reason this is not the case, then perform the following steps to set coherence-cluster-* as the default:

1. Open the URL: http://127.0.0.1:5601/

2. Navigate to the Management side-bar.

3. Click Index Patterns, then select the coherence-cluster-* pattern.

4. Click Star on the top right to set as default.

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