Install an Apache Zookeeper cluster manager to OpenShift

[computate]

As a team, install an Apache Zookeeper cluster manager to OpenShift.

Install an Apache Zookeeper Container Image Stream

• Login to your OpenShift environment here: https://api.rh-us-east-1.openshift.com
• Open the project named: southerncoalition
• Click the [ Add to Project ] button in the top right.
• Click "Deploy Image"
• Select "Image Name" and enter: quay.io/computate/computate-zookeeper
• For other values, you can leave them as the default, then click [ Create ]
• Click [ Close ]

Install an Apache Zookeeper Config Map

• Open the config maps of the OpenShift project by clicking [ Resources ] -> [ Config Maps ]
• Click "Create Config Map"
• For the config map "Name" enter: computate-zookeeper
• For the config map "Key", enter the name of the main Zookeeper config file: zoo.cfg
• For the config map "Value", see the contents of the main Zookeeper config file below:

tickTime=2000
dataDir=/opt/zookeeper
clientPort=2181
admin.enableServer=false

• Click [ Create ]

Install an Apache Zookeeper Persistent Volume Claim

• Open the persistent volume claims of the OpenShift project by clicking [ Storage ]
• Click "Create Storage"
• For the config map "Storage Class", enter: gp2-encrypted
• For the config map "Name" enter: computate-zookeeper
• For the config map "Size" in GiB, enter: 1
• For other values, you can leave them as the default, then click [ Create ]
• Click [ Create ]

Verify the Apache Zookeeper Service

• Open the services of the OpenShift project by clicking [ Applications ] -> [ Services ]
• Notice that an apache-zookeeper service already exists. Click on the "apache-zookeeper" service.
• Notice that it has a service with an assigned cluster IP address that proxies TCP traffic on port 2181 to a target port of 2181 on the pod. 2181 is the default port of Apache Zookeeper.
• You might notice a related pod that is not receiving traffic and is in a state of "Crash Loop Back-off". That is because the computate-zookeeper application is not completely configured yet.

Configure the Apache Zookeeper Deployment Config

• Open the deployment configs of the OpenShift project by clicking [ Applications ] -> [ Deployments ]
• Notice that an apache-zookeeper deployment config already exists. Click on the "apache-zookeeper" deployment config, then click on the "Configuration" tab.

Configure Apache Zookeeper Recreate deployments

• On the apache-zookeeper deployment config, click [ Actions ] -> Edit
• Change the Strategy Type to: Recreate
• to keep some existing rolling strategy parameters, click [ Yes ]
• Click [ Save ]

Configure an Apache Zookeeper Resource Limit

• On the apache-zookeeper deployment config, click [ Actions ] -> Edit Resource Limits
• For the "Memory" in MiB, enter: 256
• For other values, you can leave them as the default, then click [ Save ]

Configure Apache Zookeeper Data Volume Mount

• On the apache-zookeeper deployment config, click [ Actions ] -> Add Storage
• Select the existing "computate-zookeeper" persistent volume claim storage
• For the "Mount Path", enter: /opt/zookeeper/data
• For the "Volume Name", enter: volume-computate-zookeeper-data
• For other values, you can leave them as the default, then click [ Add ]

Configure Apache Zookeeper Config Volume Mount

• On the apache-zookeeper deployment config, click the "Configuration" tab
• In the "Volumes" section, click "Add Config Files"
• For the "Source", select: computate-zookeeper
• For the "Mount Path", enter: /opt/zookeeper/conf
• For other values, you can leave them as the default, then click [ Add ]

At this point, you should find the computate-zookeeper running with the pod no longer in an error state.