eole-mariadb/README.md

eole-mariadb

Début des travaux pour l'utilisation de mariadb dans Eole avec des fonctionalitées avancées du type mise en clustter

How-to for Eole 2.6.2 (using this repo dico and templates)

FIXME

How-to for Eole 2.6.2 (From scratch)

Sources

• https://mariadb.com/kb/en/library/getting-started-with-mariadb-galera-cluster/
• https://mariadb.com/kb/en/library/installing-mariadb-deb-files/#installing-mariadb-galera-cluster-with-apt-get
• https://downloads.mariadb.org/mariadb/repositories/#mirror=ovh&distro=Ubuntu&distro_release=xenial--ubuntu_xenial&version=10.2
• http://galeracluster.com/documentation-webpages/?id=galera_parameters_0.8
• https://mariadb.com/kb/en/library/mariadb-galera-cluster-known-limitations/
• https://www.howtoforge.com/tutorial/how-to-install-and-configure-galera-cluster-on-ubuntu-1604/

Requirements

• 2 eolebase 2.6.2 servers

Adding MariaDB (Galera) cluster repository (on each server)

GenConfig (Mode Expert) -> Dépôt tiers :

• Libellé du dépôt : MariaDB
• Déclaration du dépôt : deb [arch=amd64] http://mariadb.mirrors.ovh.net/MariaDB/repo/10.2/ubuntu xenial main
• Méthode de récupération de la clé publique du dépôt : serveur de clés
• URL du serveur de clés : hkp://keyserver.ubuntu.com:80
• Empreinte de la clé : 0xF1656F24C74CD1D8

Installing MariaDB software on the First Node aka "Node1"

• Query-Auto
• apt install mariadb-server

Secure MariaDB installation

• mysql_secure_installation

Configure the Master

• vim /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="eole_cluster"
wsrep_cluster_address="gcomm://<IP_NODE1>,<IP_NODE2>"

# Galera Synchronization Configuration
wsrep_sst_method=rsync

# Galera Node Configuration
wsrep_node_address="<IP_NODE1>"
wsrep_node_name="Node1"

Open Firewall ports

• 3306/tcp
• 4444/tcp
• 4567/tcp
• 4568/tcp
• 4567/udp

Bootstraping the new cluster

• systemctl stop mariadb
• galera_new_cluster

Check cluster size

• mysql -u root -p -e "show status like 'wsrep_cluster_size'"

+--------------------+-------+
| Variable_name      | Value |
+--------------------+-------+
| wsrep_cluster_size | 1     |
+--------------------+-------+

Installing MariaDB software in the Second node aka "Node2"

• Query-Auto
• apt install mariadb-server

Secure MariaDB installation

• mysql_secure_installation

Configure the Master

• vim /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="eole_cluster"
wsrep_cluster_address="gcomm://<IP_NODE1>,<IP_NODE2>"

# Galera Synchronization Configuration
wsrep_sst_method=rsync

# Galera Node Configuration
wsrep_node_address="<IP_NODE2>"
wsrep_node_name="Node2"

Open Firewall ports

• 3306/tcp
• 4444/tcp
• 4567/tcp
• 4568/tcp
• 4567/udp

Restart MariaDB

• systemctl restart mysql

Check Cluster Size

• mysql -u root -p -e "show status like 'wsrep_cluster_size'"

+--------------------+-------+
| Variable_name      | Value |
+--------------------+-------+
| wsrep_cluster_size | 2     |
+--------------------+-------+