Accessing to a MariaDB Galera Cluster on Ubuntu 16.04 from SpringBoot app

Question

I've installed a MariaDB Galera Cluster on Ubuntu 16.04 in 2 nodes.

Here the info from node1:

root@localhost:~# sudo more /etc/mysql/conf.d/galera.cnf
[mysqld]
binlog_format=ROW
default-storage-engine=innodb
innodb_autoinc_lock_mode=2
bind-address=0.0.0.0
# Galera Provider Configuration
wsrep_on=ON
wsrep_provider=/usr/lib/galera/libgalera_smm.so
# Galera Cluster Configuration
wsrep_cluster_name="galera_cluster"
wsrep_cluster_address="gcomm://192.168.143.81,192.168.148.75"

# Galera Synchronization Configuration
wsrep_sst_method=rsync

# Galera Node Configuration
wsrep_node_address="192.168.143.81"
wsrep_node_name="Node1"

and Here the info from node2:

mysqld]
binlog_format=ROW
default-storage-engine=innodb
innodb_autoinc_lock_mode=2
bind-address=0.0.0.0
# Galera Provider Configuration
wsrep_on=ON
wsrep_provider=/usr/lib/galera/libgalera_smm.so
# Galera Cluster Configuration
wsrep_cluster_name="galera_cluster"
wsrep_cluster_address="gcomm://192.168.143.81,192.168.148.75"

# Galera Synchronization Configuration
wsrep_sst_method=rsync

# Galera Node Configuration
wsrep_node_address="192.168.148.75"
wsrep_node_name="Node2”

I am accessing the DB from a Java app. with these properties:

spring.datasource.url=jdbc:mysql://192.168.143.81:3306/can_peris_db
spring.datasource.username=peris
spring.datasource.password=3nRam0nD3L3s0l1v3s
spring.jpa.show-sql=false
spring.jpa.properties.hibernate.format_sql=true
hibernate.dialect=org.hibernate.dialect.MySQLDialect

Everything is working fine and the data is replicated in both DBs.. but when I shut down the server 192.168.143.81 I got the error java.net.NoRouteToHostException: No route to host (Host unreachable)

Is there a way to connect automatically to the host that is available ?

Answer 1

You need to set up a floating IP and install Keepalived