add galera
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James Oliver
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19
templates/galera/0/README.md
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templates/galera/0/README.md
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# Galera Cluser (Experimental)
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### Info:
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This template creates a MariaDB Galera cluster on top of Rancher. Using the Galera plugin, the MariaDB cluster runs in a multi-master replicated mode.
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When deployed from the catalog, a three node cluster is created with a database, root password, database user and password. The cluster is set up for replication between all of the nodes. The cluster sits behind a light weight proxy layer that forwards all reads/writes to a single server in order for transaction locks. The proxy layer is fronted by a Rancher load balancer.
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Clients should access the cluster through the load balancer so they do not need to be updated in the event of a failure.
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When the cluster is completely stopped and started, user intervention is required to bring it back online. Instructions can be found in the [Galera documentation](http://galeracluster.com/documentation-webpages/quorumreset.html).
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The replication mechanism used in the cluster is based on the MySQL dump method. This has the side effect of taking a long time to bring in a new node when there are large data sets.
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### Usage:
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Once deployed, use a mysql client to connect:
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`mysql -u<db_user> -p -h<galera-lb>`
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52
templates/galera/0/docker-compose.yml
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templates/galera/0/docker-compose.yml
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mariadb-galera-server:
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image: rancher/galera:10.0.22-rancher2
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net: "container:galera"
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environment:
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TERM: "xterm"
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MYSQL_ROOT_PASSWORD: "${mysql_root_password}"
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MYSQL_DATABASE: "${mysql_database}"
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MYSQL_USER: "${mysql_user}"
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MYSQL_PASSWORD: "${mysql_password}"
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volumes_from:
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- 'mariadb-galera-data'
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labels:
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io.rancher.container.hostname_override: container_name
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entrypoint: bash -x /opt/rancher/start_galera
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mariadb-galera-data:
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image: rancher/galera:10.0.22-rancher2
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net: none
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environment:
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MYSQL_ALLOW_EMPTY_PASSWORD: "yes"
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volumes:
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- /var/lib/mysql
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- /etc/mysql/conf.d
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- /docker-entrypoint-initdb.d
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- /opt/rancher
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command: /bin/true
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labels:
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io.rancher.container.start_once: true
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galera-leader-forwarder:
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image: rancher/galera-leader-proxy:v0.1.0
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net: "container:galera"
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volumes_from:
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- 'mariadb-galera-data'
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galera:
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image: rancher/galera-conf:v0.2.0
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labels:
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io.rancher.sidekicks: mariadb-galera-data,mariadb-galera-server,galera-leader-forwarder
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io.rancher.container.hostname_override: container_name
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io.rancher.scheduler.affinity:container_label_soft_ne: io.rancher.stack_service.name=$${stack_name}/$${service_name}
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volumes_from:
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- 'mariadb-galera-data'
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stdin_open: true
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tty: true
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command: /bin/bash
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galera-lb:
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expose:
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- 3306:3307/tcp
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tty: true
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image: rancher/load-balancer-service
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links:
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- galera:galera
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stdin_open: true
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templates/galera/0/rancher-compose.yml
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templates/galera/0/rancher-compose.yml
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.catalog:
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name: "Galera DB"
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version: 10.0.22-rancher1
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description: |
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Galera Cluster based on MariaDB 10.0.22
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questions:
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- variable: "mysql_root_password"
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type: string
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required: true
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label: "MySQL Root Password"
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description: "Password given to the root mysql user"
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- variable: "mysql_database"
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type: string
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required: true
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label: "MySQL Database Name"
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description: "MySQL database to create"
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- variable: "mysql_user"
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type: string
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required: true
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description: "MySQL user for the created database"
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label: "MySQL DB User"
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- variable: "mysql_password"
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type: string
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required: true
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label: "MySQL DB Password"
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description: "Password for the MySQL user of the created database"
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galera:
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scale: 3
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metadata:
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mysqld: |
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innodb_file_per_table = 1
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innodb_autoinc_lock_mode=2
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query_cache_size=0
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query_cache_type=0
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innodb_flush_log_at_trx_commit=0
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binlog_format=ROW
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default-storage-engine=innodb
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wsrep_provider=/usr/lib/galera/libgalera_smm.so
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wsrep_provider_options="gcache.size = 2G"
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wsrep_sst_method=mysqldump
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wsrep_sst_auth=root:${mysql_root_password}
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progress=1
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galera-lb:
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scale: 1
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load_balancer_config: {}
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health_check:
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port: 42
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interval: 2000
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unhealthy_threshold: 3
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healthy_threshold: 2
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response_timeout: 2000
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66
templates/galera/catalogIcon-galera.svg
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templates/galera/catalogIcon-galera.svg
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After Width: | Height: | Size: 6.2 KiB |
5
templates/galera/config.yml
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5
templates/galera/config.yml
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name: MariaDB Galera Cluster
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description: |
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(Experimental) Synchronous multi-master cluster for MariaDB
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version: 10.0.22-rancher1
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category: Database
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