https://github.com/jelastic-jps/glassfish
GlassFish Cluster with Automatic Scaling
https://github.com/jelastic-jps/glassfish
auto-scaling cluster cluster-configuration clustering das docker docker-cluster glassfish glassfish-cluster glassfish-server haproxy load-balancer loadbalancing scalability worker-nodes
Last synced: about 1 month ago
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GlassFish Cluster with Automatic Scaling
- Host: GitHub
- URL: https://github.com/jelastic-jps/glassfish
- Owner: jelastic-jps
- License: apache-2.0
- Created: 2016-05-02T21:47:04.000Z (about 9 years ago)
- Default Branch: master
- Last Pushed: 2021-03-23T12:31:20.000Z (about 4 years ago)
- Last Synced: 2025-04-02T04:01:39.518Z (about 2 months ago)
- Topics: auto-scaling, cluster, cluster-configuration, clustering, das, docker, docker-cluster, glassfish, glassfish-cluster, glassfish-server, haproxy, load-balancer, loadbalancing, scalability, worker-nodes
- Language: JavaScript
- Homepage:
- Size: 253 KB
- Stars: 5
- Watchers: 3
- Forks: 12
- Open Issues: 0
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Metadata Files:
- Readme: README.md
- License: LICENSE.md
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README
# GlassFish with Automatic Clustering and Scaling
Java EE often looks like a black box when it comes to deployment, clustering and scaling. You can get rid of this complexity using pre-configured clusters in domain mode with automatically scaled instances and standard flows for zero code change deployment. The default topology and scaling triggers can be easily adjusted.
[Follow the link](https://jelastic.com/blog/glassfish-payara-auto-clustering-cloud-hosting/) to get more details on how clustering works and high availability is configured, as well as how to test this implementation.
## GlassFish Cluster Topology
Due to the native GlassFish clustering architecture, its topology includes three node groups:
- **_Load Balancer(LB)_** - intended to process all incoming requests, sent to the cluster, and distribute them between worker nodes
- **_Worker Node(W)_** - application server to handle the required app and web services
- **_Domain Administration Server (DAS)_** - management instance which performs centralized control of the cluster nodes and configure communication between them via SSH
Current implementation of Jelastic scalable GlassFish 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 deploying this solution, you’ll get the already configured and ready-to-work GlassFish cluster inside the Cloud, that consists of DAS node, 2 GF application servers (workers), NGINX load balancer and is secured by [Jelastic SSL](https://docs.jelastic.com/jelastic-ssl).
For the detailed guidance on this JPS package installation and management, refer to the [GlassFish Cluster with Automatic Load Balancing](https://jelastic.com/blog/how-to-configure-glassfish-cluster-with-automatic-load-balancing/) page.
## Automatic Scaling and Clustering Configuration
GlassFish cluster package automatically adjusts a number of Worker nodes based on current cluster load (up to 10 instances per layer) according to the following conditions:
- +1 node if RAM usage > 70% for at least 1 minute
- -1 node if RAM usage < 40% for at least 10 minute
The appropriate modifications are automatically applied to _DAS_ and _Load Balancer_ configs, and multiple application server instances are automatically interconnected that implements the commonly used clustering configuration.
In case you’d like to change the conditions of automatic nodes’ scaling, 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 GF cluster, click the **GET IT HOSTED** button below. Within the opened frame, specify your email address, choose one of the [Jelastic Public Cloud providers](https://jelastic.cloud/) and press **Install**.
[](https://jelastic.com/install-application/?manifest=https://raw.githubusercontent.com/jelastic-jps/glassfish/master/manifest.jps&keys=app.jelastic.eapps.com;app.jelastic.saveincloud.net;app.mircloud.host;app.j.layershift.co.uk;app.milesweb.cloud;app.paas.massivegrid.com)
### Private Cloud
If working within Jelastic Private Cloud, copy link of the [**_manifest.jps_**](https://raw.githubusercontent.com/jelastic-jps/glassfish/master/manifest.jps) file above and [import](https://docs.jelastic.com/environment-import) it to the required Jelastic installation.