Hi David There are some docs AndersW wrote in these tickets, for background info:
https://sourceforge.net/p/opensaf/tickets/64/ https://sourceforge.net/p/opensaf/tickets/2795/ You have to decide whether your etcd cluster is internal or external to your OpenSAF cluster. Basically, there are hooks in the OpenSAF code to obtain a "lock" in etcd before a node is promoted to Active. The sample etcd3.plugin assumes there's an etcd instance running locally on each SC. The configuration is in fmd.conf # To enable split brain prevention, change to 1 export FMS_SPLIT_BRAIN_PREVENTION=1 # Full path to key-value store plugin export FMS_KEYVALUE_STORE_PLUGIN_CMD=/full/path/to/etcd3.plugin Gary ________________________________ From: Hoyt, David <dh...@rbbn.com> Sent: 28 May 2020 23:53 To: opensaf-users@lists.sourceforge.net <opensaf-users@lists.sourceforge.net> Subject: [users] opensaf and etcd Hi all, I see opensaf has etcd plugins, and a README file that describes installing etcd, but I'm not clear on how opensaf actually works with etcd. Has anyone made use of this utility? Are there examples? Normally, an opensaf controller starts and broadcasts the UDP message to see if it can become the active controller. Basically, if it's the only one currently in the cluster, it becomes active. Now, if opensaf is configured to use etcd, does it still broadcast the UDP message or does it communicate with etcd and try and get the lock file? Thus, if it gets the lock file, it becomes active. If the active controller goes down for some reason, normally, the standby becomes active. Now, with etcd, how does this interaction work? Does the standby still become active and then it has to take ownership of the etcd lock file? Yet, the old active would still own it. Do I have to write code to bridge the gap between opensaf and etcd, using the plugins, or does opensaf already have the code in place to do this interaction once etcd is enabled? Again, some examples would help in the understanding of how opensaf makes use of etcd. Regards, David ----------------------------------------------------------------------------------------------------------------------- Notice: This e-mail together with any attachments may contain information of Ribbon Communications Inc. that is confidential and/or proprietary for the sole use of the intended recipient. Any review, disclosure, reliance or distribution by others or forwarding without express permission is strictly prohibited. If you are not the intended recipient, please notify the sender immediately and then delete all copies, including any attachments. ----------------------------------------------------------------------------------------------------------------------- _______________________________________________ Opensaf-users mailing list Opensaf-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/opensaf-users _______________________________________________ Opensaf-users mailing list Opensaf-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/opensaf-users
