Constraints - 上的 SAP HANAAmazon
约束：启动SAPHanaTopology优化前SAPHanaRHEL 7.xRHEL 8.x约束共同定位aws-vpc-move-ip资源与主SAPHana资源RHEL 7.xRHEL 8.x
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Constraints

定义两个约束，一个用于有助于将客户端流量路由到活动数据库主机的覆盖 IP 地址，另一个用于SAPHANA和SAPHanaTopology资源代理。

约束：启动SAPHanaTopology优化前SAPHana

以下命令将创建强制这些资源的启动顺序的约束。

RHEL 7.x

pcs constraint order SAPHanaTopology_HDB_00-clone then 
SAPHana_HDB_00-master symmetrical=false

[root@prihana ~]# pcs constraint order SAPHanaTopology_HDB_00-clone 
then SAPHana_HDB_00-master symmetrical=false
Adding SAPHanaTopology_HDB_00-clone SAPHana_HDB_00-master (kind: 
Mandatory) (Options: first-action=start then-action=start 
symmetrical=false)
[root@prihana ~]#

RHEL 8.x

pcs constraint order SAPHanaTopology_HDB_00-clone then 
SAPHana_HDB_00-clone symmetrical=false

  • symmetrical=false— 此属性定义它只是资源的开始顺序，不需要以相反的顺序停止。

  • interleave = true— 此属性允许在节点上并行启动这些资源。这允许SAPHana资源在任何节点上启动SAPHanaTopology资源在任何一个节点上运行。

使用以下命令创建约束：

[root@prihana ~]# pcs constraint order SAPHanaTopology_HDB_00-clone 
then SAPHana_HDB_00-clone symmetrical=false
Adding SAPHanaTopology_HDB_00-clone SAPHana_HDB_00-clone (kind: 
Mandatory) (Options: first-action=start then-action=start 
symmetrical=false)

这两种资源 (SAPHana和SAPHanaTopology）具有属性interleave=true，允许在节点上并行启动这些资源。

约束共同定位aws-vpc-move-ip资源与主SAPHana资源

以下命令将共同定位aws-vpc-move-ip资源中的SAPHana资源提升为主资源时。

RHEL 7.x

pcs constraint colocation add hana-oip with master SAPHana_HDB_00-master 2000
[root@prihana ~]# pcs constraint
Location Constraints:
Ordering Constraints:
  start SAPHanaTopology_HDB_00-clone then start SAPHana_HDB_00-master (kind:Mandatory) 
  (non-symmetrical)
Colocation Constraints:
  hana-oip with SAPHana_HDB_00-master (score:2000) (rsc-role:Started) (with-rsc-role:Master)
Ticket Constraints:
[root@prihana ~]#

RHEL 8.x

pcs constraint colocation add hana-oip with master SAPHana_HDB_00-clone 2000
[root@prihana ~]# pcs constraint
Location Constraints:
Ordering Constraints:
  start SAPHanaTopology_HDB_00-clone then start SAPHana_HDB_00-clone (kind:Mandatory) 
(non-symmetrical)
Colocation Constraints:
  hana-oip with SAPHana_HDB_00-clone (score:2000) (rsc-role:Started) (with-rsc-role:Master)
Ticket Constraints:
[root@prihana ~]#

您可以使用以下命令查看集群的最终状态：

[root@prihana ~]# pcs status
Cluster name: rhelhanaha
Stack: corosync
Current DC: sechana (version 1.1.19-8.el7_6.5-c3c624ea3d) - partition with quorum
Last updated: Tue Nov 10 17:54:13 2020
Last change: Tue Nov 10 17:53:48 2020 by root via crm_attribute on prihana

2 nodes configured
6 resources configured

Online: [ prihana sechana ]

Full list of resources:

 clusterfence   (stonith:fence_aws):    Started prihana
 Clone Set: SAPHanaTopology_HDB_00-clone [SAPHanaTopology_HDB_00]
     Started: [ prihana sechana ]
 Master/Slave Set: SAPHana_HDB_00-master [SAPHana_HDB_00]
     Masters: [ prihana ]
     Slaves: [ sechana ]
 hana-oip       (ocf::heartbeat:aws-vpc-move-ip):       Started prihana

Daemon Status:
  corosync: active/enabled
  pacemaker: active/enabled
  pcsd: active/enabled
[root@prihana ~]#

SAP HANA 群集设置的配置到此结束。您可以继续进行测试。