[wildfly-dev] Wildfly layers

Hi, here is an attempt to describe the galleon layers we could see exposed in order to build custom configurations. The way layers are provisioned by galleon make the provisioned server to be much smaller (in term of XML config and num of provisioned modules) than the default installation/configurations. We are here covering standalone kind of configuration. Feedbacks would be really welcome. I took the approach to not have layers to depend on legacy security-realms, we want elytron to be the way to go, so depending on these first place would create a maintainability issue. This does create some complexity when defining default configs, default config have to associate realms with management and subsystems to produce the default standalone configs we know. This complexity is not exposed. Each layer is "runnable", you can provision it and run it. Only common.* and standalone.* scripts are provisioned. Doesn't mean that running it alone makes sense. Any combination of layers should be valid. A layer brings its own dependencies and its XML configuration. Each subsystem (even server) is in charge to advertise to galleon what are the additional modules it is injecting or loading that should be provisioned but are not referenced from extension module. All the subsystems involved in the following layers have been updated to express these dependencies. Because Full layers are far from being defined, we could expect some adjustment. For core: Layers not bound to subsystems - base-server: root resource, pubic interface and socket binding. All layers depend at least on it. - management: unsecured management interface, management sockets, http-interface - secure-management: depends on management, configures elytron sasl authentication factory for management http interface - tools: all modules and tools script files (cli, add-user,...) - patching: patching modules. Layers bound to subsystems - core-management - deployment-scanner - discovery - elytron (brings openssl artifacts, openssl can't be used if elytron openssl provider is not configured.). - io - jmx - jmx-remoting: depends on jmx and configure remoting-connector. Depend on management (requires jboss.remoting.endpoint.management service) - logging - remoting: depends on io - request-controller - security-manager Aggregation Layer This layer defines a server with elytron secured management and all layers one would expect when running a core-server - core-server: depends on secure-management (brings elytron), jmx-remoting (brings jmx), logging, core-management, request-controller, security-manager. For servlet Layers not bound to subsystems - picketbox: A layer to brings picketbox module (and optional deps of picketbox present in servlet FP). Picketbox could be combined with some core layers without requiring the legacy security subsystem to be present. Layers bound to subsystems - ee: depends on naming - legacy-security (security sub-system): depends on naming and picketbox. - naming - undertow: depends on io and picketbox (to bring optional deps of picketbox, we still have hard dep on picketbox from security-negociation). This is a base undertow server, no security, no https-listener, empty servlet container (no support for servlet, jsp deployments). NB: welcome-content is not part of the layer, it is bring by the default configs. legacy default-security-domain "other" is also not configured, that is done in the default config too. - undertow-load-balancer: depends on io and picketbox. Undertow configured to act as a load-balancer. Web server layer This layer defines a server containing all layers one would expect when running an unsecure web-server. legacy-security is not included. In addition, this layer evolves undertow to be a full servlet-container (jsp, servlet, web-socket) and http-invoker. - web-server: ee (brings naming), deployment-scanner, undertow (brings picketbox and io) A note on combining layers. In order to evolve a web-server to become fully manageable, one would combine core-server (the management features) with web-server (web support). Because core layers are accessible from servlet FP, one could pick and choose from servlet FP to assemble his server. For example, a basic manageable unsecured (but ready to be configured for security) undertow server: undertow+management+elytron For full: We have identified an initial set of layers that would be the building blocks to help define cloud oriented configurations. Layers bound to subsystem: These layers depend (at least) on web-server (from servlet) - cdi: brings in weld and bean-validation - jaxrs - jpa: brings in hibernate default providers. In addition brings-in transactions, jca and infinispan (hibernate infinispan-cache). - activemq-jms: naked subsystem, no server configured. In addition brings-in transactions and jca - microprofile: opentracing, config, healths and metrics (last 2 depend on management). Layers that are simple extension of existing layers (would not appear as new layers but would extend content of servlet/core ones). - ee: add optional dependencies injected by dup present in full FP. - undertow: add undertow.js package. - tools: vault, jdr, wstools, appclient Aggregation layer - cloud-profile: contains cdi,jaxrs,jpa,activemq-jms,microprofile . All optionally included, allowing for exclusion (eg: exclude activemq-jms). Open questions SSL undertow As you noticed we don't have a layer for an SSL undertow. elytron doesn't offer an out of the box generation of self-signed certificate. Only legacy security realms offer this. So the way to go would be to provision undertow+elytron+management+tools (management+tools to use CLI), create the keystore, do the elytron configuration, add an https-listener, set the ssl-context, remove all the management related stuff from CLI. Then exclude the management+tools layers to get a smaller foot-print (tools bring a lot). NB: we could imagine that the CLI configuration is done from a provisioned server that contains tools so no need to provision tools with undertow. I am wandering if we should create an elytron SSL context that points to a "REPLACE_WITH_THE_PATH_TO_YOUR_KEYSTORE" kind of configuration to simplify configuration steps? I don't really like this idea to generate config that points to invalid artifacts but would simplify the configuration steps. Picketbox layer Because we want at some point to get rid-off this dependency, I am wandering if we should really define a layer for it. Could be that any dependency on it would imply the use of legacy-security layer. Picketbox is implicit when legacy-security layer is provisioned. Full layers granularity For now, we have included some major features (transactions, jca, infinispan) without making them layers. The layers that are depending on them are for the only consumers. When we progress with new layers, this would be revisited. Thank-you for having reached the end. ;-) JF