PowerVM 环境下实施 PowerHA 7.1的要点

然后在 HA 节点上（vioc）查看， sfwcom 已经可见。

# lscluster -i sfwcom
Network/Storage Interface Query
    
Cluster Name: wxycluster
Cluster UUID: 397cd38e-8bdc-11e2-844a-ce02cc0e300a
Number of nodes reporting = 1
Number of nodes stale = 0
Number of nodes expected = 1
    
Node node1
Node UUID = 398263b2-8bdc-11e2-844a-ce02cc0e300a
Number of interfaces discovered = 1
        Interface number 1, sfwcom
                IFNET type = 0 (none)
                NDD type = 304 (NDD_SANCOMM)
                Smoothed RTT across interface = 0
                Mean deviation in network RTT across interface = 0
                Probe interval for interface = 100 ms
                IFNET flags for interface = 0x00000000
                NDD flags for interface = 0x00000009
                Interface state = UP
# lsdev -C|grep sfw
sfw0           Available             Storage Framework Module
sfwcomm0       Available 20-T1-01-FF Fibre Channel Storage Framework Comm
sfwcomm1       Available             vLAN Storage Framework Comm

这样，在虚拟化环境下实现 PowerHA7.1 的 FC heartbeat 就完成了。

测试将 node1 节点 halt -q，然后再 node2 上观察 node1 节点的 sfwcom 接口状态，处于 stale 状态，而 node2    自身的 sfwcom 状态正常，这符合预期：

Node node1
Node UUID = 398263b2-8bdc-11e2-844a-ce02cc0e300a
Number of interfaces discovered = 3
        Interface number 1, en0
                IFNET type = 6 (IFT_ETHER)
                NDD type = 7 (NDD_ISO88023)
                MAC address length = 6
                MAC address = CE:02:CC:0E:30:0A
                Smoothed RTT across interface = 7
                Mean deviation in network RTT across interface = 3
                Probe interval for interface = 100 ms
                IFNET flags for interface = 0x1E080863
                NDD flags for interface = 0x0021081B
                Interface state = STALE
                Number of regular addresses configured on interface = 2
                IPv4 ADDRESS: 172.16.25.175 broadcast 172.16.25.255 netmask 255.255.255.0
                IPv4 ADDRESS: 172.16.25.178 broadcast 172.16.25.255 netmask 255.255.255.0
                Number of cluster multicast addresses configured on interface = 1
                IPv4 MULTICAST ADDRESS: 228.16.25.175
        Interface number 2, sfwcom
                IFNET type = 0 (none)
                NDD type = 304 (NDD_SANCOMM)
                Smoothed RTT across interface = 0
                Mean deviation in network RTT across interface = 0
                Probe interval for interface = 100 ms
                IFNET flags for interface = 0x00000000
                NDD flags for interface = 0x00000009
                Interface state = STALE
        Interface number 3, dpcom
                IFNET type = 0 (none)
                NDD type = 305 (NDD_PINGCOMM)
                Smoothed RTT across interface = 76
                Mean deviation in network RTT across interface = 7
                Probe interval for interface = 830 ms
                IFNET flags for interface = 0x00000000
                NDD flags for interface = 0x00000009
                Interface state = STALE

总结

通过目前的实施案例来看，在 PowerVM 环境下实施 PowerHA7.1 是完全没有问题的，PowerHA 也能实现其在物理分区中相同的功能。关于技术要点，总结如下：

PowerHA7.1 中允许 1 个 HA 节点只有 1 个网卡、1 个 BootIP 和一个 ServiceIP，并且 ServieIP 可以和 BootIP 在相同网段，这为在 VIOC 中简化网络结构提供了便利（网络的高可用通过 VIOS 上 SEA 的 NIB 或 EtherChannel 来实现） 。

netmon.cf 的功能的成功实现，解决了 PowerHA 监控虚拟网卡状态的问题

FC 心跳的虚拟环境下的实施保证了 VIOC 在没有物理 HBA 卡的情况下，通过虚拟 FC 心跳的功能，使 PowerHA 更加稳定，有效地预防脑裂。

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