Store "host ignore" data in the domain wide model ------------------------------------------------- Key: WFCORE-1340 URL: https://issues.jboss.org/browse/WFCORE-1340 Project: WildFly Core Issue Type: Enhancement Components: Domain Management Reporter: Brian Stansberry Assignee: Brian Stansberry Fix For: 3.0.0.Alpha1 Including an EAP 6.x slave in a mixed domain managed by a WF 10 / EAP 7 DC is overly difficult operationally because potentially numerous host configurations need to be manually updated whenever new server groups and profiles are added. An issue with managing mixed domains is the need for the slave's host.xml to include configuration of what domain-wide content should be ignored. This isn't nice as it requires modifying potentially many host configs when new domain-wide content is added (e.g. new server groups or profiles that the legacy slaves won't understand.) Core 2 / Full 10 are better in this regard as they allow "ignore-unused-configuration" where stuff is auto-ignored. But this still has weaknesses: 1) The "ignore-unused-configuration" logic is slave-side and is not present in EAP 6.x slaves. So for those slaves manual configuration is the only option. 2) Extensions are not covered, so new extensions in later releases may need to be manually configured. (The goal though is to cover this in 11, so this JIRA would just provide a fallback for 11 DCs managing 10 slaves in case that goal is not met. EAP 6 slaves would not benefit from this though.) Idea here is to include config for host-ignores in the domain-wide model, for use by the DC. It's in the domain-wide model, not the DC's host.xml, to ensure that any backup HC has the latest data. Proposed structure: Resources are at address /host-ignore=* Attributes are: * slave-api-major-version * slave-api-minor-version * slave-api-micro-version * slave-release These identify the category of slave to which host-ignore data should be applied when a matching slave registers. The first 3 attributes identify the *core management API version* of the slave (not its release version.) The last is a user-friendly *alternative* to the first 3 and is an enum identifying well known releases (e.g. EAP6.2, EAP6.3, EAP6.4) from which the api versions can be derived. If slave-api-micro-version is undefined, the meaning is the config applies to all releases of the given major/minor version, excluding any for which a config with a micro version specified is also present. Not specifying a micro is expected to be the norm. The "slave-release" enums will be for minors. In addition to the above scoping attributes, the following attributes will be supported: * ignored-extensions * unignored-server-groups The ignored-extensions attribute is a list of extension names the resources for which (/extension=X) should be treated as ignored by the target hosts. The unignored-server-groups attribute is a list of server groups names the members of which should be treated as *not* ignored by the target hosts. These are the groups used by the host's servers. The server-group and related profile, socket-binding-group and deployment resources will not be ignored; all others will be ignored. This is the same data that a core 2 / WF 10 slave sends when it registers. This JIRA just provides a different mechanism for making the data known to the DC. Adding a new group to unignored-server-groups will not cause existing slave HCs to get new data sent to them, at least not in the first round of this work. The slave will need to reconnect to get new data. There is other data that could be included in these resources, e.g. fine grained "ignore" information matching what can be configured in host.xml, but that is out of scope for this first cut, and may never be added if there is no clear demand.