Task 01. Verify Cluster
Before proceeding with the HA test, let’s verify that the cluster is normally state and connect to the instance through the Session Manager.
- Connect to prihana instance through Session Manager. After log in to AWS Management Console, Connect to EC2 Instance Console.
- Choose HANA-HDB-Primary instance and click Connect.
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- Select Session Manager and click Connect.
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- Check SAP HANA System Replication (HSR) status.
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Check the status using hdbnsutil -sr_state command (using the hdbadm user)
- You can see that HAP(prihana) site is primary and HAS(sechana) site is sync.
sudo su - hdbadm
hdbnsutil -sr_state
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Check the status using HDBSettings.sh systemReplicationStatus.py command (using the hdbadm user)
- You can see that Primary node is prihana and Secondary node is sechana.
HDBSettings.sh systemReplicationStatus.py
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Check the status using SAPHanaSR-showAttr command (using root user)
- You can see that sechana node is SOK
exit
sudo su -
SAPHanaSR-showAttr
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Check the cluster configuration.
- crm is a tool to configure and manage clusters.
- To check how HA works, check the two options PREFER_SITE_TAKEOVER and AUTOMATED_REGISTER. If both are true, it means that Takeover is automatically performed, and if Secondary is normal, it is automatically registered.
- Confirm Cluster configuration using the crm configure show command (using root user)
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Check the cluster status.
- crm_mon is a command that provides the current state of the cluster (using root user).
- Execute this command to check if prihana is in Master status.
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