The software described in this documentation is either no longer supported or is in extended support.
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You can configure Inter-Server Synchronization (ISS) to synchronize channel content, channel permissions, and organizational trust settings between Spacewalk servers. The configuration of local non-content settings for users and organizations is not affected. One Spacewalk server acts as a master to provide content to any number of slave Spacewalk servers. Typical use cases include:
The content on the slave servers is regularly synchronized with the master server to obtain the latest maintenance releases.
Content is developed and tested on the master server before distribution to the slave servers.
Slave servers have local content that is additional to that synchronized from the master server.
You can configure master servers that are themselves slaves of a higher-level master Spacewalk server. The usual ISS topology is a tree-like hierarchy, where there is one top-level master server and each slave has only one master, rather than a directed graph, where there might be several top-level master servers and each slave can have more than one master. If a slave has more than one master, you can designate one to be the default master with which the slave synchronizes.
You can use the spacewalk-sync-setup command to set up the relationships between master and slave Spacewalk servers, or you can use the Spacewalk web interface to configure each server independently.