https://github.com/jelastic-jps/tomcat-cluster

Apache Tomcat/TomEE Cluster with Automatic Scaling
https://github.com/jelastic-jps/tomcat-cluster

autoscaling cluster clustering containers docker high-availability jakartaee javaee loadbalancing scaling tomcat-configuration tomcat-scalable-java tomcat-server

Last synced: 3 days ago
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Apache Tomcat/TomEE Cluster with Automatic Scaling

• Host: GitHub
• URL: https://github.com/jelastic-jps/tomcat-cluster
• Owner: jelastic-jps
• License: apache-2.0
• Created: 2021-03-15T14:31:41.000Z (over 3 years ago)
• Default Branch: main
• Last Pushed: 2023-06-22T10:03:51.000Z (over 1 year ago)
• Last Synced: 2023-07-31T16:20:36.584Z (over 1 year ago)
• Topics: autoscaling, cluster, clustering, containers, docker, high-availability, jakartaee, javaee, loadbalancing, scaling, tomcat-configuration, tomcat-scalable-java, tomcat-server
• Language: JavaScript
• Homepage:
• Size: 145 KB
• Stars: 2
• Watchers: 4
• Forks: 4
• Open Issues: 0
• Metadata Files:
  • Readme: Readme.md
  • License: LICENSE

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README

        






# Tomcat/TomEE Auto-Clustering

The Apache Tomcat/TomEE remain popular over the years and work great in a clustered environment ensuring required level of high availability and scalability while hosting your applications. You can easily deploy such a cluster avoiding a setup complexity and even providing load balancing to efficiently distribute incoming traffic.

## Tomcat/TomEE Cluster Topology

Due to the native Tomcat clustering architecture, its topology includes two node groups:   

- Scalable **Load Balancer(LB)** - intended to process all incoming requests, sent to the cluster, and distribute them between *Worker* nodes

- Scalable *Worker* **Node 1..N** - application servers to run the required app and web services







Current implementation of Jelastic scalable Tomcat/TomEE cluster is built on top of Docker containers. This ensures additional reliability through operating each node as an isolated instance and enables simple [container update](https://docs.jelastic.com/docker-update) procedure. 

Upon cluster deployment, you will get the already configured and ready-to-work Apache Tomcat/TomEE cluster in the Cloud, that comprises 2 Tomcat/TomEE application servers (workers) and NGINX load balancer by default. 

## Automatic Scaling and Clustering Configuration 

Tomcat/TomEE cluster is configured to scale automatically. The appropriate modifications are automatically applied to  _Load Balancer_ configs and all cluster instances,  registering and configuring new *Worker* nodes.

In case you’d like to setup scaling strategy for your cluster, refer to the appropriate triggers parameters within the [Automatic Horizontal Scaling](https://docs.jelastic.com/automatic-horizontal-scaling) settings section.

## Cloud Hosting Deployment

### Public Cloud

To instantly host your own scalable Tomcat/TomEE cluster, click the **DEPLOY TO JELASTIC** button below. Within the opened frame, specify your email address, choose one of the [Jelastic Public Cloud providers](https://jelastic.cloud/) and press **Install**.

[![Deploy](images/deploy-to-jelastic.png)](https://jelastic.com/install-application/?manifest=https://raw.githubusercontent.com/jelastic-jps/tomcat-cluster/main/manifest.jps)

### Private Cloud

If working within Jelastic Private Cloud, copy link of the [*_manifest.jps_*](https://raw.githubusercontent.com/jelastic-jps/tomcat-cluster/main/manifest.jps) file above and [import](https://docs.jelastic.com/environment-import) it to the required Jelastic installation.