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This document describes the steps to stop and start the database and RabbitMQ in a HA environment. |
Check Galera cluster leader
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On the datanodes, check the state of Galera:
Code Block [root@datanodes2 /]# cd /var/lib/mysql/ [root@datanodes2 mysql]# cat grastate.dat # GALERA saved state version: 2.1 uuid: c0e2c5f4-e045-11e9-988e-d6d16254ad99 seqno: -1 safe_to_bootstrap: 0
If there is a node with safe_to_bootstrap=1, you should start the cluster on this node
If no node is marked as safe_to_bootstrap, force it (using the virt virtual IP).
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Stop Galera cluster
To stop the Galera cluster do these steps.
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[root@datanodes1 mysql]# maxadmin show servers [root@datanodes1 mysql]# maxadmin list servers |
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Check RabbitMQ
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cluster and rejoin
On each node datanode server do these commands.
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rabbitmqctl stop_app rabbitmqctl join_cluster rabbit@datanodes1 rabbitmqctl join_cluster rabbit@datanodes2 rabbitmqctl start_app rabbitmqctl cluster_status |
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Start services and servers
After you restart the Galera, MySQL and RabbitMQ on the datanode servers, do these steps
On the services datanodes, manually start the Redis service
Start the monitoring cluster (remember to wait 5 minutes for Cassandra and 1 minute for KairosDB)
Start other Abiquo servers (or restart tomcat services)