Master Wildfly 8 Administration with this PDF 22 Guide
Wildfly 8 Administration Guide PDF 22: What You Need to Know
If you are looking for a comprehensive, practical and up-to-date guide on how to administer Wildfly 8, the latest version of the popular open source Java EE application server, then you have come to the right place. In this article, you will learn everything you need to know about installing, configuring, deploying, managing, monitoring, securing, clustering, backing up, troubleshooting, testing, developing and extending Wildfly 8. You will also learn how to upgrade and migrate from previous versions of Wildfly or JBoss AS, as well as how to use Wildfly 8 microservices and cloud features. By the end of this article, you will be able to master Wildfly 8 administration with ease and confidence.
wildfly 8 administration guide pdf 22
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How to Install and Configure Wildfly 8 on Your System
Before you can start using Wildfly 8, you need to install it on your system. The installation process is simple and straightforward. You just need to download the appropriate distribution for your operating system from the official website (https://wildfly.org/downloads/) and unzip it in a directory of your choice. You can also use the installer (https://wildfly.org/get-started/) if you prefer a graphical interface.
After installing Wildfly 8, you need to configure it according to your needs. The main configuration file is located in the standalone/configuration directory for standalone mode or in the domain/configuration directory for domain mode. The file name is standalone.xml or domain.xml, depending on the mode you choose. You can edit this file manually or use the CLI (command-line interface), the web console or the management API (application programming interface) to make changes.
The configuration file contains several elements that define various aspects of Wildfly 8. Some of the most important elements are:
<extensions>: This element specifies the modules that provide the core functionality of Wildfly 8, such as logging, security, messaging, transactions, etc.
<system-properties>: This element defines the system properties that affect the behavior of Wildfly 8 and the applications running on it.
<management>: This element configures the management interfaces and security realms for Wildfly 8.
<profile>: This element defines the subsystems that provide the Java EE services and features for Wildfly 8, such as servlets, EJBs, JPA, CDI, etc.
<socket-binding-group>: This element defines the network ports and addresses that Wildfly 8 uses for communication.
<server-group>: This element defines the groups of servers that share the same configuration and deployment in domain mode.
<host>: This element defines the hosts that run the servers in domain mode.
<deployment>: This element defines the applications that are deployed on Wildfly 8.
You can find more details about the configuration file and its elements in the official documentation (https://docs.wildfly.org/8/Admin_Guide.html#Configuration_Files).
How to Deploy and Manage Applications on Wildfly 8
Once you have installed and configured Wildfly 8, you can start deploying and managing your applications on it. You can deploy your applications in various ways, such as copying them to the standalone/deployments or domain/deployments directory, using the CLI, the web console or the management API, or using Maven or other tools. You can also use different formats for your applications, such as WAR, EAR, JAR or SAR.
After deploying your applications, you can manage them using the same tools that you used for deployment. You can start, stop, restart, undeploy, redeploy, enable, disable or view the status of your applications. You can also configure various aspects of your applications, such as datasources, JNDI names, security roles, dependencies, etc.
You can find more details about deploying and managing applications on Wildfly 8 in the official documentation (https://docs.wildfly.org/8/Admin_Guide.html#Application_Deployment_and_Management).
How to Monitor and Tune Wildfly 8 Performance
Monitoring and tuning Wildfly 8 performance is an essential task for any administrator. You need to keep an eye on the resource usage and performance metrics of Wildfly 8 and its applications, such as CPU, memory, disk, network, threads, sessions, requests, responses, etc. You also need to identify and resolve any performance issues or bottlenecks that may affect the availability and reliability of Wildfly 8 and its applications.
You can use various tools to monitor and tune Wildfly 8 performance, such as JConsole (https://docs.oracle.com/javase/8/docs/technotes/guides/management/jconsole.html), VisualVM (https://visualvm.github.io/), JMeter (https://jmeter.apache.org/), JProfiler (https://www.ej-technologies.com/products/jprofiler/overview.html), etc. You can also use the CLI, the web console or the management API to access and modify the performance attributes and operations of Wildfly 8 and its subsystems.
You can find more details about monitoring and tuning Wildfly 8 performance in the official documentation (https://docs.wildfly.org/8/Admin_Guide.html#Performance_Monitoring_and_Tuning).
How to Secure Wildfly 8 with SSL, Authentication and Authorization
Securing Wildfly 8 with SSL (secure sockets layer), authentication and authorization is another important task for any administrator. You need to ensure that the communication between Wildfly 8 and its clients is encrypted and protected from eavesdropping and tampering. You also need to ensure that only authorized users can access Wildfly 8 and its applications and resources.
How to Cluster and Load Balance Wildfly 8 Servers
Clustering and load balancing Wildfly 8 servers is a useful technique for improving the scalability, availability and performance of Wildfly 8 and its applications. You can cluster and load balance Wildfly 8 servers by using mod_cluster (https://modcluster.io/), Undertow (http://undertow.io/) and Infinispan (https://infinispan.org/).
mod_cluster is a native Apache HTTP Server module that provides dynamic load balancing and failover of Wildfly 8 servers. It uses a smart algorithm that takes into account various factors, such as CPU load, memory usage, session count, etc., to distribute the requests among the available servers. It also supports sticky sessions, SSL, virtual hosts, etc.
Undertow is a high-performance web server that is embedded in Wildfly 8. It supports HTTP/2, WebSocket, Servlet 4.0, JSP, JSF, etc. It also provides load balancing capabilities by using a simple round-robin algorithm or a more advanced mod_cluster algorithm.
Infinispan is a distributed in-memory data grid that provides caching, clustering and data grid capabilities for Wildfly 8 and its applications. It supports replication, distribution, invalidation and expiration of data across multiple nodes. It also supports transactions, events, queries, etc.
You can find more details about clustering and load balancing Wildfly 8 servers in the official documentation (https://docs.wildfly.org/8/Admin_Guide.html#Clustering_and_Load_Balancing).
How to Use Wildfly 8 High Availability Features
High availability is another key feature of Wildfly 8 that ensures that Wildfly 8 and its applications can continue to operate without interruption or loss of data in case of failures or disasters. You can use various features of Wildfly 8 to achieve high availability, such as singleton services, distributed caches and failover domains.
Singleton services are services that are guaranteed to run on only one node in a cluster at any given time. They are useful for coordinating tasks or resources that require mutual exclusion or consistency across the cluster. You can use the <singleton> element in the configuration file to define singleton services.
Distributed caches are caches that are shared among multiple nodes in a cluster. They are useful for storing data that needs to be accessed or modified by multiple nodes or applications. You can use Infinispan to create and use distributed caches.
Failover domains are groups of servers that can take over the workload of another server in case of failure. They are useful for ensuring that the requests are always served by an available server. You can use mod_cluster to create and use failover domains.
You can find more details about using Wildfly 8 high availability features in the official documentation (https://docs.wildfly.org/8/Admin_Guide.html#High_Availability).
How to Backup and Restore Wildfly 8 Data
Backup and restore are essential operations for any administrator who wants to prevent data loss or corruption in case of failures or disasters. You can backup and restore Wildfly 8 data by using snapshots, backups and restores.
Snapshots are copies of the configuration and deployment files of Wildfly 8 at a given point in time. They are useful for saving the state of Wildfly 8 before making any changes or updates. You can use the CLI, the web console or the management API to create and manage snapshots.
Backups are copies of the data stored in the subsystems or applications of Wildfly 8 at a given point in time. They are useful for saving the data of Wildfly 8 before performing any maintenance or recovery tasks. You can use various tools to create and manage backups, such as Infinispan backup tools (https://infinispan.org/docs/stable/titles/rest/rest.html#rest_v2_backup_restore), JBoss EAP backup tools (https://access.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/7.3/html/administration_and_configuration_guide/backing_up_and_restoring_jboss_eap), etc.
Restores are operations that restore the configuration, deployment or data files of Wildfly 8 from a previous snapshot or backup. They are useful for recovering the state or data of Wildfly 8 after a failure or disaster. You can use the CLI, the web console or the management API to perform restores.
You can find more details about backing up and restoring Wildfly 8 data in the official documentation (https://docs.wildfly.org/8/Admin_Guide.html#Backup_and_Restore).
How to Troubleshoot and Debug Wildfly 8 Issues
Troubleshooting and debugging Wildfly 8 issues is a common and important task for any administrator who wants to identify and resolve any problems or errors that may affect the functionality or performance of Wildfly 8 and its applications. You can troubleshoot and debug Wildfly 8 issues by using logging, exception handling and debugging tools.
Logging is the process of recording the events and messages that occur during the execution of Wildfly 8 and its applications. It is useful for tracking the activities and outcomes of Wildfly 8 and its applications, as well as for detecting and diagnosing any issues or errors. You can use various mechanisms to configure and manage logging in Wildfly 8, such as loggers, handlers, formatters, filters, levels, categories, etc. You can also use the CLI, the web console or the management API to access and modify the logging attributes and operations of Wildfly 8 and its subsystems.
Exception handling is the process of dealing with the exceptions that are thrown by Wildfly 8 and its applications. It is useful for preventing the exceptions from causing unwanted or unexpected results or behaviors, as well as for providing useful information or actions for resolving the exceptions. You can use various mechanisms to handle exceptions in Wildfly 8, such as try-catch-finally blocks, throws clauses, exception mappers, error pages, etc.
Debugging is the process of finding and fixing the bugs or defects that cause the issues or errors in Wildfly 8 and its applications. It is useful for improving the quality and reliability of Wildfly 8 and its applications, as well as for learning and understanding how they work. You can use various tools to debug Wildfly 8 and its applications, such as Eclipse (https://www.eclipse.org/), IntelliJ IDEA (https://www.jetbrains.com/idea/), NetBeans (https://netbeans.org/), etc.
You can find more details about troubleshooting and debugging Wildfly 8 issues in the official documentation (https://docs.wildfly.org/8/Admin_Guide.html#Troubleshooting_and_Debugging).
How to Use Wildfly 8 Testing Tools
Testing is another essential task for any administrator who wants to ensure that Wildfly 8 and its applications are working correctly and meet the requirements and expectations of the users and stakeholders. You can test Wildfly 8 and its applications by using various tools, such as Arquillian (http://arquillian.org/), JUnit (https://junit.org/junit5/), Selenium (https://www.selenium.dev/), etc.
Arquillian is a testing framework that allows you to write and run integration tests for Java EE applications on Wildfly 8. It supports various types of tests, such as unit tests, functional tests, acceptance tests, etc. It also supports various modes of testing, such as embedded mode, managed mode, remote mode, etc.
JUnit is a testing framework that allows you to write and run unit tests for Java applications on Wildfly 8. It supports various features, such as annotations, assertions, test suites, test runners, etc. It also supports various extensions, such as Mockito (https://site.mockito.org/), PowerMock (https://github.com/powermock/powermock), etc.
How to Use Wildfly 8 Development Tools
Development is another important task for any administrator who wants to create and modify Wildfly 8 and its applications. You can develop Wildfly 8 and its applications by using various tools, such as Maven (https://maven.apache.org/), Eclipse (https://www.eclipse.org/), IntelliJ IDEA (https://www.jetbrains.com/idea/), etc.
Maven is a build automation tool that allows you to manage the dependencies, build lifecycle, plugins, profiles, etc. of Wildfly 8 and its applications. It supports various features, such as archetypes, goals, phases, repositories, etc. It also supports various plugins, such as wildfly-maven-plugin (https://docs.wildfly.org/8/Admin_Guide.html#Maven_Plugin), arquillian-maven-plugin (http://arquillian.org/arquillian-core/#maven), etc.
Eclipse is an integrated development environment (IDE) that allows you to write and edit the code, run and debug the tests, deploy and manage the applications, etc. of Wildfly 8 and its applications. It supports various features, such as editors, views, perspectives, launchers, etc. It also supports various plugins, such as JBoss Tools (https://tools.jboss.org/), m2eclipse (https://www.eclipse.org/m2e/), etc.
IntelliJ IDEA is another IDE that allows you to write and edit the code, run and debug the tests, deploy and manage the applications, etc. of Wildfly 8 and its applications. It supports various features, such as code completion, refactoring, debugging, testing, etc. It also supports various plugins, such as JBoss Integration (https://plugins.jetbrains.com/plugin/216-jboss-integration), Maven Integration (https://plugins.jetbrains.com/plugin/1166-maven), etc.
You can find more details about using Wildfly 8 development tools in the official documentation (https://docs.wildfly.org/8/Admin_Guide.html#Development_Tools).
How to Upgrade and Migrate from Previous Versions of Wildfly or JBoss AS
Upgrade and migration are common operations for any administrator who wants to benefit from the new features and improvements of Wildfly 8 or switch from JBoss AS (application server), the predecessor of Wildfly 8. You can upgrade and migrate from previous versions of Wildfly or JBoss AS by using the migration tool, the compatibility mode and the migration guide.
The migration tool is a CLI tool that allows you to analyze and migrate the configuration and deployment files of previous versions of Wildfly or JBoss AS to Wildfly 8. It supports various features, such as scanning, reporting, transforming, copying, etc. You can download the migration tool from the official website (https://wildfly.org/downloads/#migration-tool).
The compatibility mode is a mode that allows you to run previous versions of Wildfly or JBoss AS on Wildfly 8 without any changes or modifications. It supports various features, such as legacy subsystems, legacy profiles, legacy management interfaces, etc. You can enable the compatibility mode by using the --compatibility option when starting Wildfly 8.
The migration guide is a document that provides detailed instructions and best practices on how to upgrade and migrate from previous versions of Wildfly or JBoss AS to Wildfly 8. It covers various topics, such as prerequisites, steps, tips, troubleshooting, etc. You can access the migration guide from the official website (https://docs.wildfly.org/8/Migration_Guide.html).
You can find more details about upgrading and migrating from previous versions of Wildfly or JBoss AS in the official documentation (https://docs.wildfly.org/8/Admin_Guide.html#Upgrade_and_Migration).
How to Extend and Customize Wildfly 8 with Modules, Subsystems and Extensions
Extend and customize are advanced operations for any administrator who wants to add new functionality or modify existing functionality of Wildfly 8 and its applications. You can extend and customize Wildfly 8 by using modules, subsystems and extensions.
Modules are units of code that provide specific functionality or services for Wildfly 8 and its applications. They are organized in a hierarchical structure based on their names and dependencies. They are loaded dynamically by a modular class loader that avoids class loading conflicts and improves performance. You can create and use custom modules by using the module add or module remove commands in the CLI or by using the <module> element in the configuration file.
Subsystems are components that provide Java EE services and features for Wildfly 8 and its applications. They are configured and managed by the <subsystem> element in the configuration file. They are implemented by modules that contain the code and resources for the subsystems. You can create and use custom subsystems by using the subsystem add or subsystem remove commands in the CLI or by using the <subsystem> element in the configuration file.
Extensions are plugins that provide management interfaces and operations for Wildfly 8 and its subsystems. They are registered and loaded by the <extension> element in the configuration file. They are implemented by modules that contain the code and resources for the extensions. You can create and use custom extensions by using the extension add or extension remove commands in the CLI or by using the <extension> element in the configuration file.
You can find more details about extending and customizing Wildfly 8 with modules, subsystems and extensions in the official documentation (https://docs.wildfly.org/8/Admin_Guide.html#Extending_and_Customizing).
How to Use Wildfly 8 Microservices Features
Microservices are a software architecture style that consists of developing and deploying applications as a collection of small, independent an