Ticket [#1453] added support for autoscaling, which allows scale-out from an
initial cluster containing at least one node. This commit adds support for
scaling out from a cluster containing zero nodes, or alternatively, a cluster
where the active node is not a configured node. The use cases are as follows:
* Support loading a backup that was created on a different cluster where none of
the new nodes have the same name as any of the nodes in the old cluster.
* Support cluster restart on a system where nodes don't have persistent local
storage (or persistent host names / node names) - i.e. a system where a node
reboot will always result in a scale-in followed by a scale-out
* Make scaling more robust, e.g. imagine a case when a one-node cluster is
scaled out by adding a second node, but then the original node is removed
before scale-out of the new node has completed.
---
src/clm/clmd/clms_main.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/src/clm/clmd/clms_main.c b/src/clm/clmd/clms_main.c
index 9a46bd845..c21e89bab 100644
--- a/src/clm/clmd/clms_main.c
+++ b/src/clm/clmd/clms_main.c
@@ -163,8 +163,16 @@ static uint32_t clms_self_node_info(void)
node = clms_node_get_by_name(&node_name_dn);
if (node == NULL) {
- LOG_ER("%s not found in the database. Please verify %s",
- node_name_dn.value, node_name_file);
+ if (clms_cb->scale_out_script != NULL) {
+ LOG_NO("Own node %s not found in the database. It will "
+ "be scaled out since autoscaling is enabled.",
+ node_name_dn.value);
+ rc = NCSCC_RC_SUCCESS;
+ } else {
+ LOG_ER("Own node %s not found in the database. Please "
+ "update %s or enable autoscaling",
+ node_name_dn.value, node_name_file);
+ }
goto done;
}
--
2.13.1
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