title: mariadb 10.1.13 galera cluster : error
body: <p>mariadb 10.1.x galera cluster setting.</p>
  <p>first node 192.168.159.132</p>
  <h1>/etc/mysql/my.cnf</h1>
  <pre><code>[galera]
  # Mandatory settings
  wsrep_on=ON
  wsrep_provider=/usr/lib/galera/libgalera_smm.so
  wsrep_cluster_address=gcomm://192.168.159.132,192.168.159.135,192.168.159.136
  binlog_format=row
  default_storage_engine=InnoDB
  innodb_autoinc_lock_mode=2
  </code></pre>
  <p>first node 192.168.159.132</p>
  <h1>$ sudo service mysql bootstrap</h1>
  <pre><code>* Bootstrapping the cluster mysqld
  Starting mysql (via systemctl): mysql.service
  Job for mariadb.service failed because the control process exited with error code. See &quot;systemctl status mariadb.service&quot; and &quot;journalctl -xe&quot; for details.
  </code></pre>
  <h1>$ systemctl status mariadb.service</h1>
  <pre><code>[ERROR] WSREP: gcs/src/gcs_core.cpp:gcs_core_open():208: Failed to open backend connection: -110 (Connection timed out)
  [ERROR] WSREP: gcs/src/gcs.cpp:gcs_open():1379: Failed to open channel 'my_wsrep_cluster' at 'gcomm://192.168.32.251,192.168.32.252,192.168.32...ection timed out)
  [ERROR] WSREP: gcs connect failed: Connection timed out
  [ERROR] WSREP: wsrep::connect(gcomm://192.168.32.251,192.168.32.252,192.168.32.253) failed: 7
  [ERROR] Aborting
  systemd[1]: mariadb.service: Main process exited, code=exited, status=1/FAILURE
  systemd[1]: Failed to start MariaDB database server.
  systemd[1]: mariadb.service: Unit entered failed state.
  systemd[1]: mariadb.service: Failed with result 'exit-code'.
  </code></pre>
  <h1>Why &quot;Galera Cluster&quot; not Start?</h1>
  <h1>How To checking &quot;Connection Time Out&quot;?</h1>