enable-high-availability

Description

Enable high availability (HA).

This command must be run on a host containing a running and connectable Master Aggregator.

Wrap the password string in single quotes (') to avoid having the shell try to interpret any special characters included in the string.

This command connects to the master aggregator, sets redundancy_level to 2, and then removes and re-adds half of the leaf nodes in the cluster into the second availability group.

This command will only work if all leaf nodes in the cluster share a user and password with the SUPER permission.

This command is offline and will interrupt the currently running workload. It is best to run this command before adding any leaf nodes to the cluster.

Usage

Usage:
  memsqlctl enable-high-availability [flags]

Flags:
  -h, --help                  Help for enable-high-availability
  -p, --password STRING       The database user's password for re-adding the leaf nodes
      --skip-colocate-check   Do not check whether the colocation of a leaf pair is necessary
      --skip-disk-check       Do not check that each leaf node's host has at least half of its disk space free
      --user string           The database user for re-adding the leaf nodes (default "root")

Global Flags:
  -c, --config FILE_PATH                     Path to the memsqctl config file
      --default-install-dir DIRECTORY_PATH   Path to the default install directory
      --insecure-ssl                         Fall back to insecure SSL connections to local nodes if memsqlctl is unable to otherwise establish a connection (ADVANCED)
  -j, --json                                 Print output in JSON format
      --node-metadata-file FILE_PATH         Path to the node metadata file
      --parallelism POSITIVE_INTEGER         Maximum amount of operations to be run in parallel
      --ssl-ca FILE_PATH                     The path to the CA certificate file (in PEM format) to authenticate the database certificate
      --timeout duration                     Maximum time for operation to complete (e.g., 30s, 10m, 1.5h)
      --verbose-json                         Print output in JSON format, include some warnings and user messages
  -v, --verbosity count                      Increase logging verbosity
  -y, --yes                                  Enable non-interactive mode and assume the user would like to move forward with the proposed actions by default

Remarks

This command is interactive unless you use either --yes or --json flag to override interactive behavior.
The memsqlctl enable-high-availability command is equivalent to the sdb-admin enable-high-availability command.