In this example, we have 3 MySQL instances on a single host created with MySQL Sandbox:ĬlusterControl monitoring multiple instances on same host Each MySQL instance must be treated as a single entity per server group. Monitoring multiple MySQL instances on a machine is still possible with ClusterControl with a simple workaround. It usually resides under /etc/ and /etc/mysql. As such, automatic recovery for node/cluster won’t work.Ĭonfiguration management – ClusterControl provisions the standard MySQL configuration directory. With multiple MySQL instances, this is a false positive approach. Process management – ClusterControl uses the standard ‘pgrep -f mysqld_safe’ to check if MySQL is running on that host. With the above assumptions, the following ClusterControl features do not work for a host with multiple instances:īackup – Percona Xtrabackup does not support multiple instances per host and mysqldump executed by ClusterControl only connects to the default socket. In an environment with multiple instances per host, you should expect redundant host statistics since it monitors the same host multiple times. It keeps monitoring the host statistics e.g CPU/RAM/disk/network for each MySQL instance individually.The MySQL is bound to an IP address reachable by ClusterControl node.MySQL client must be installed on the host and available on the executable path for the corresponding OS user.It monitors, manages and deploys only one MySQL instance per host.MySQL instances are configured uniformly across a cluster same port, the same location of logs, base/data directory and other critical configurations.With regards to the points mentioned above, ClusterControl assumes that in a cluster/server group: All MySQL instances are running with uniform configuration across the cluster/server group, e.g., listening port, error log, datadir, basedir, socket are identical.MySQL data redundancy should be configured on N+1 server.Only one MySQL instance per host (physical server or virtual machine).ClusterControl LimitationĪt the time of writing, ClusterControl does not support monitoring of multiple instances on one host per cluster/server group. In this blog post, we’ll show you how to configure ClusterControl to monitor multiple MySQL instances running on one host. Or you can use mysqld_multi available in MySQL to start or stop any number of separate mysqld processes running on different TCP/IP ports and UNIX sockets. You can use MySQL Sandbox to create multiple MySQL instances. This eliminates the potential for conflict between instances. Whether or not you use distinct server binaries, each instance that you run must be configured with unique values for several operating parameters. Or you might run multiple instances of the latest MySQL version, each managing a different set of databases. For example, you might run a server from MySQL 5.6 and one from MySQL 5.7, to see how the different versions handle a certain workload. It is possible to use a different MySQL server binary per instance, or use the same binary for multiple instances (or a combination of the two approaches). You might want to give different users access to their own MySQL servers that they manage themselves, or you might want to test a new MySQL release while keeping an existing production setup undisturbed. On some occasions, you might want to run multiple instances of MySQL on a single machine. Applies to MySQL based instances/clusters. This page was generated by GitHub Pages.Requires ClusterControl 1.6 or later. Using dbdeployer source for other projectsĭbdeployer is maintained by datacharmer.MySQL Document store, mysqlsh, and defaults.Using the direct path to the expanded tarball.Multiple sandboxes, same version and type.Standard and non-standard basedir names.From remote tarball to ready to use in one step.See the features comparison for more detail.ĭocumentation updated for version 1.66.0 (2 10:30 UTC) This is a port of MySQL-Sandbox, originally written in Perl, and re-designed from the ground up in Go. View on GitHub dbdeployerĭBdeployer is a tool that deploys MySQL database servers easily. dbdeployer DBdeployer is a tool that deploys MySQL database servers easily. Dbdeployer | DBdeployer is a tool that deploys MySQL database servers easily.
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