Difference between revisions of "Pacemaker start and stop for Hana DB and application servers"
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[[Main Page|Home]] > [[Suse]] > [[SAP setup and maintenance]] > [[Pacemaker start and stop for Hana DB and application servers]] | |||
=Stop Application servers= | =pacemaker should not auto-start on node after reboot= | ||
The below article assumed paceamaker service does not automatically start on App and DB servers on OS boot. If the App or DB has pacemaker service enabled to automatically start on boot then steps might differ. Especially in that case the primary App (ACS) might start on secondary node and ERS might start on primary node. Hence best option is to have auto-start of pacemaker disabled on machie boot. | |||
If that is not possible, we should consider putting secondary node in maintenance mode before removing cluster from maintenance mode using: | |||
<pre> | |||
crm node maintenance <NODENAME> | |||
</pre> | |||
Once cluster services are up and running on primary properly. Then for secondary node use: | |||
<pre> | |||
crm node ready NODENAME | |||
</pre> | |||
=Stopping services= | |||
For stopping services: | |||
* Stop Application servers | |||
* Stop Database servers | |||
* Stop NFS server | |||
==Stop Application servers== | |||
To stop application servers use: | To stop application servers use: | ||
# Put the cluster in maintenance mode: | # Put the cluster in maintenance mode: | ||
Line 9: | Line 29: | ||
#:</pre> | #:</pre> | ||
# Stop SAP services (PAS & AAS services) with help of SAP Application team | # Stop SAP services (PAS & AAS services) with help of SAP Application team | ||
# Stop cluster services on | # Stop cluster services on '''Secondary node''' | ||
### Stop pacemaker cluster | ### Stop pacemaker cluster | ||
##:<pre> | ##:<pre> | ||
Line 18: | Line 38: | ||
##:: crm status | ##:: crm status | ||
##:</pre> | ##:</pre> | ||
# Stop cluster services on | # Stop cluster services on '''Primary node''' | ||
## Stop pacemaker cluster | ## Stop pacemaker cluster | ||
##:<pre> | ##:<pre> | ||
Line 29: | Line 49: | ||
==Stop Database servers== | |||
=Stop Database servers | |||
To stop database server use: | To stop database server use: | ||
# Put the cluster in maintenance mode: | # Put the cluster in maintenance mode: | ||
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#:</pre> | #:</pre> | ||
# Stop SAP DB services with help of SAP team | # Stop SAP DB services with help of SAP team | ||
# Stop cluster services on | # Stop cluster services on '''Secondary node''' | ||
## stop pacemaker cluster | ## stop pacemaker cluster | ||
##:<pre> | ##:<pre> | ||
Line 52: | Line 70: | ||
##:: HDB info | ##:: HDB info | ||
##:</pre> | ##:</pre> | ||
# Stop cluster services on | # Stop cluster services on '''Primary node''' | ||
## Stop pacemaker cluster | ## Stop pacemaker cluster | ||
##:<pre> | ##:<pre> | ||
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=Starting services= | |||
To start services: | |||
* Start NFS servers | |||
* Start database servers | |||
* Start application servers | |||
==Start database servers== | |||
To start database server use: | To start database server use: | ||
# Start HANA DB manually '''on primary node'''. Take Help from SAP team | |||
# Also wait for '''SAP application team''' to start Primary to Secondary replication at DB level. Once replication to secondary is in proper state, we can proceed further. | |||
# Start cluster services on '''Primary node''' | |||
## Start pacemaker cluster | ## Start pacemaker cluster | ||
##:<pre> | ##:<pre> | ||
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##:: crm status | ##:: crm status | ||
##:</pre> | ##:</pre> | ||
# After starting the services in master node, '''wait for 5-10 minutes'''. | |||
# Start cluster services on '''Secondary node''' | |||
## Start pacemaker cluster | ## Start pacemaker cluster | ||
##:<pre> | ##:<pre> | ||
Line 98: | Line 123: | ||
==Start application servers== | |||
= | |||
To start application servers use: | To start application servers use: | ||
# Start cluster services on | # Start cluster services on Primary node | ||
## Start pacemaker cluster | ## Start pacemaker cluster | ||
##:<pre> | ##:<pre> | ||
Line 114: | Line 138: | ||
##:: crm status | ##:: crm status | ||
##:</pre> | ##:</pre> | ||
# | # Check the cluster services on Secondary node | ||
# | ## Start cluster on secondary node | ||
## | ##:<pre> | ||
## | ##:: systemctl start pacemaker | ||
##:</pre> | |||
## Secondary node might automatically restart due to fencing, after the pacemaker cluster is started on the Primary node | |||
## After reboot, again start pacemaker on secondary node and check cluster services status | |||
##:<pre> | ##:<pre> | ||
##:: systemctl start pacemaker | |||
##:: crm status | ##:: crm status | ||
##:</pre> | ##:</pre> | ||
# Start SAP services (PAS & AAS services) with help of SAP Application team. This typically involves below on both application servers one for ERS and for ASCS: | |||
#:<pre> | |||
#:: su - <sapuser> | |||
#:: startsap | |||
#:</pre> | |||
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[[Main Page|Home]] > [[Suse]] > [[SAP setup and maintenance]] > [[Pacemaker start and stop for Hana DB and application servers]] |
Latest revision as of 03:45, 10 April 2024
Home > Suse > SAP setup and maintenance > Pacemaker start and stop for Hana DB and application servers
pacemaker should not auto-start on node after reboot
The below article assumed paceamaker service does not automatically start on App and DB servers on OS boot. If the App or DB has pacemaker service enabled to automatically start on boot then steps might differ. Especially in that case the primary App (ACS) might start on secondary node and ERS might start on primary node. Hence best option is to have auto-start of pacemaker disabled on machie boot.
If that is not possible, we should consider putting secondary node in maintenance mode before removing cluster from maintenance mode using:
crm node maintenance <NODENAME>
Once cluster services are up and running on primary properly. Then for secondary node use:
crm node ready NODENAME
Stopping services
For stopping services:
- Stop Application servers
- Stop Database servers
- Stop NFS server
Stop Application servers
To stop application servers use:
- Put the cluster in maintenance mode:
- crm configure property maintenance-mode=true
- Stop SAP services (PAS & AAS services) with help of SAP Application team
- Stop cluster services on Secondary node
- Stop pacemaker cluster
- systemctl stop pacemaker.service
- Check services status
- crm status
- Stop cluster services on Primary node
- Stop pacemaker cluster
- systemctl stop pacemaker.service
- Check cluster services status
- crm status
- Stop pacemaker cluster
Stop Database servers
To stop database server use:
- Put the cluster in maintenance mode:
- crm configure property maintenance-mode=true
- Stop SAP DB services with help of SAP team
- Stop cluster services on Secondary node
- stop pacemaker cluster
- systemctl stop pacemaker.service
- Check cluster services status
- crm status
- Check HANA DB services status
- su - <username>
- HDB info
- stop pacemaker cluster
- Stop cluster services on Primary node
- Stop pacemaker cluster
- systemctl stop pacemaker.service
- Check cluster services status
- crm status
- Check HANA DB services status
- su - <username>
- HDB info
- Stop pacemaker cluster
Starting services
To start services:
- Start NFS servers
- Start database servers
- Start application servers
Start database servers
To start database server use:
- Start HANA DB manually on primary node. Take Help from SAP team
- Also wait for SAP application team to start Primary to Secondary replication at DB level. Once replication to secondary is in proper state, we can proceed further.
- Start cluster services on Primary node
- Start pacemaker cluster
- systemctl start pacemaker.service
- Remove cluster from maintenance mode:
- crm configure property maintenance-mode=false
- Check cluster services status
- crm status
- Start pacemaker cluster
- After starting the services in master node, wait for 5-10 minutes.
- Start cluster services on Secondary node
- Start pacemaker cluster
- systemctl start pacemaker.service
- Check cluster services status
- crm status
- Start pacemaker cluster
Start application servers
To start application servers use:
- Start cluster services on Primary node
- Start pacemaker cluster
- systemctl start pacemaker.service
- Remove cluster from maintenance mode:
- crm configure property maintenance-mode=false
- Check cluster services status
- crm status
- Start pacemaker cluster
- Check the cluster services on Secondary node
- Start cluster on secondary node
- systemctl start pacemaker
- Secondary node might automatically restart due to fencing, after the pacemaker cluster is started on the Primary node
- After reboot, again start pacemaker on secondary node and check cluster services status
- systemctl start pacemaker
- crm status
- Start cluster on secondary node
- Start SAP services (PAS & AAS services) with help of SAP Application team. This typically involves below on both application servers one for ERS and for ASCS:
- su - <sapuser>
- startsap
Refer:
Home > Suse > SAP setup and maintenance > Pacemaker start and stop for Hana DB and application servers