Supported tags and respective Dockerfile links
How to use this image.
When you run the image without giving any command, the entrypoint will listen at port 13306 waiting for a command. To send a command, jun run:
echo "command here" | nc ip_of_container port
So, basically, you can get a cluster running by following the steps:
- start each container with:
without password
docker run \
-v /path/to/my.cnf:/etc/mysql/my.cnf \
-v /path/to/mariadb:/var/lib/mysql \
-v /path/to/certs/:/etc/ssl/mysql:ro \
-e MYSQL_ALLOW_EMPTY_PASSWORD=true \
babim/mariadb-galera
with password
docker run \
-v /path/to/my.cnf:/etc/mysql/my.cnf \
-v /path/to/mariadb:/var/lib/mysql \
-v /path/to/certs/:/etc/ssl/mysql:ro \
-e MYSQL_ROOT_PASSWORD=123456 \
babim/mariadb-galera
- concat all containers IP into a
gcomm://string, like:
gcomm://10.0.0.1,10.0.0.2,10.0.0.3
- start first container as new cluster:
echo "mysqld --wsrep-new-cluster --wsrep-cluster-address=gcomm://10.0.0.1,10.0.0.2,10.0.0.3" | nc 10.0.0.1 13306
- on all the subsequent containers, one at a time, starts it as part of existing cluster:
echo "mysqld --wsrep-cluster-address=gcomm://10.0.0.1,10.0.0.2,10.0.0.3" | nc 10.0.0.2 13306
echo "mysqld --wsrep-cluster-address=gcomm://10.0.0.1,10.0.0.2,10.0.0.3" | nc 10.0.0.3 13306
That's it, now you should have a running MariaDB cluster.
SSL certificates
You can generate self-signed certificate, mount the directory inside the container and set the appropriate [sst] settings at /etc/mysql/my.cnf.
Example my.cnf file:
[mysqld]
datadir=/var/lib/mysql
socket=/var/run/mysqld/mysqld.sock
user=mysql
binlog-format=ROW
default-storage-engine=InnoDB
innodb-autoinc-lock-mode=2
innodb-flush-log-at-trx-commit=0
innodb-buffer-pool-size=122M
innodb-doublewrite=1
innodb-flush-method=O_DIRECT
wsrep-provider=/usr/lib/galera/libgalera_smm.so
wsrep-cluster-name=my_super_cluster
wsrep-sst-method=rsync
query-cache-size=524288
log-error=/dev/stderr
[mysql_safe]
log-error=/dev/stderr
pid-file=/var/run/mysqld/mysqld.pid
[sst]
tca=/etc/ssl/mysql/ca.pem
tcert=/etc/ssl/mysql/server-cert.pem
tkey=/etc/ssl/mysql/server-key.pem
check status:
docker exec -ti database01 mysql -e "SHOW STATUS LIKE 'wsrep_cluster%'"
+--------------------------+--------------------------------------+
| Variable_name | Value |
+--------------------------+--------------------------------------+
| wsrep_cluster_conf_id | 3 |
| wsrep_cluster_size | 3 |
| wsrep_cluster_state_uuid | 2882bcb7-ab3b-11e5-ab75-2b510ef0ec6f |
| wsrep_cluster_status | Primary |
+--------------------------+--------------------------------------+