On Sun, 2024-06-09 at 23:13 +0300, ale...@pavlyuts.ru wrote: > Hi All, > > We intend to integrate Pacemaker as failover engine into a very > specific product. The handmade prototype works pretty well. It > includes a couple of dozens coordinated resources to implement one > target application instance with its full network configuration. The > prototype was made with pcs shell, but the process is very complex > and annoying for mass- rollout by field engineers. > > Our goal is to develop a kind of configuration shell to allow a user > to setup, monitor and manage app instance as entities, not as a set > of cluster resources. Means, user deals with app settings and status, > the shell translates it to resources configuration and status and > back. > > The shell be made with Python, as it is the best for us for now. The > question for me: what is the best approach to put Pacemaker under the > capote. I did not consider to build it over pcs as pcs output quite > hard to render, so I have to use more machine-friendly interface to > pacemaker for sure but the question is which ones fits our needs the > best.
pcs, crm shell, and the Pacemaker command-line tools are the basic options > It seems like the best way is to use custom resource agents, XML > structures and cibadmin to manage configuration and get status > information. However, it is not clean: should cibadmin be used > exclusively, or there also other API to pacemaker config pull/push? If you're using the command-line tools, yes, cibadmin is the interface for CIB XML configuration changes. Other tools can perform certain configuration changes at a logically higher level (for example, crm_attribute can set node attributes in the CIB), but cibadmin can handle any XML changes. > > Also, it is not clear how to manage resource errors and cleanup? Are > there other ways that call to crm_resource for cleanup and failed > resource restart? Could it be made via CIB manipulation like force > lrm history records delete? That's what crm_resource --cleanup is for > > I understand that the source is the ultimate answer for any question, > but I will be very grateful for any advice from ones who has all the > answers on their fingertips. > > Thank you in advance for sharing your thoughts and experience! > > Sincerely, > > Alex > > > _______________________________________________ > Manage your subscription: > https://lists.clusterlabs.org/mailman/listinfo/users > > ClusterLabs home: https://www.clusterlabs.org/ -- Ken Gaillot <kgail...@redhat.com> _______________________________________________ Manage your subscription: https://lists.clusterlabs.org/mailman/listinfo/users ClusterLabs home: https://www.clusterlabs.org/
