This section explains the range of support of PRIMECLUSTER in an FJcloud-Baremetal environment.
Number of cluster nodes: 1 to 2 nodes
Operation mode of the cluster system: 1:1 Standby operation, Mutual standby, Single-node cluster
Storage configurations: Block storage (iSCSI)
Network configurations
For the cluster interconnect, its network must be independent from the network used with the administrative LAN and the public LAN. This setting is not necessary in a single-node cluster.
The servers in the cluster system must communicate with the API endpoints. This setting is not necessary in a single-node cluster.
Security groups
One security group must be set among the servers in the cluster system for a security reason.
Another security group must be set between the servers and the management client in the cluster system.
Error of OS on the server and the cluster interconnect
The cyclic monitoring of the cluster interconnect (LAN) detects a hang-up of OS and the service is switched to the standby system.
Error of the shared disk and the disk access path
By combining the volume management function (GDS), a failure of the disk access and the disk access path can be detected (monitored by the Gds resource), and the service is switched to the standby system when the disk access is disabled or a failure of the whole system of the disk access path occurs.
Error of the cluster application
When a resource error of the cluster application occurs, the service is switched to the standby system.
Note
To take over the IP address of the server, setting the virtual NIC mode for GLS is required.
To take over the data of the Bare Metal server, setting the shared disk mirroring of GDS is required.
To take over the IP address of the Bare Metal server, setting the virtual NIC mode for GLS is required.
The following functions for PRIMECLUSTER are not available:
GDS Snapshot
Root class of GDS, and disk groups of GDS other than the mirror type (netmirror, stripe, concatenation, and switch)
In addition to the above functions, the following functions for PRIMECLUSTER are not available in a single-node cluster.
GDS
GFS
Duplicate virtual server names cannot be used in the project on FJcloud-Baremetal.
For Bare Metal server names that use PRIMECLUSTER, the following ASCII characters can be used.
Do not use other characters.
Uppercase letters
Lowercase letters
Numbers
"_" (Underscore)
"-" (Hyphen)
In an FJcloud-Baremetal environment, when an OS panic occurs, the cluster node may be powered off while the memory dump is being output, and it may not be possible to collect a complete memory dump.
