Presto-Admin Command-Line Options#

A quick overview of the possible CLI options for presto-admin can be found via ./presto-admin --extended-help. More details on those options can be found below.

--version

Prints out the current presto-admin version and exits.

-h, --help

Prints out a usage string, the basic presto-admin options and the available commands, then exits.

-d, --display

Prints detailed information about a given command.

e.g., to get detailed information about the server install command, enter:

./presto-admin -d server install
--extended-help

Prints out a usage string, all the presto-admin options and the available commands, then exits.

-I, --initial-password-prompt

Forces password prompt before running any commands on the cluster.

Either this option or the --password option is necessary if the user from ~/.prestoadmin/config.json needs a password for sudo.

Note that the SSH password and the sudo password must be the same, if passwordless SSH is not used.

-p PASSWORD, --password=PASSWORD

Sets password for use with authentication and/or sudo.

Either this option or the --initial-password-prompt option is necessary if the user from ~/.prestoadmin/config.json needs a password for sudo.

Note that the SSH password and the sudo password must be the same, if passwordless SSH is not used.

--abort-on-error

Aborts the command, instead of warning, if a command fails on any node. The default for presto-admin is to warn if a command fails on any node.

-a, --no_agent

Forces presto-admin not to seek out running SSH agents when using key-based authentication.

-A, --forward-agent

Enables forwarding of a local SSH agent to the remote end.

--colorize-errors

Colorizes error output.

-D, --disable-known-hosts

Turns off loading of a user’s SSH known_hosts file. Disabling known_hosts leaves you vulnerable to man-in-the-middle attacks. However,in some environments like EC2, a particular host getting a different key should not mean that you are not able to connect via SSH to that host.

-g HOST, --gateway=HOST

Routes SSH connections through the SSH daemon on the specified gateway host to their final destination.

-H HOSTS, --hosts=HOSTS

Sets the list of hosts where a presto-admin command should be executed. The values should be comma-separated and exist in your topology.

-i PATH

Adds the SSH private key file specified by PATH to the set of keys to try during key-based SSH authentication. May be repeated.

-k, --no-keys

Disables loading private key files from ~/.ssh/.

--keepalive=N

Sends an SSH keepalive every N seconds to keep SSH from timing out.

-n M, --connection-attempts=M

Makes M attempts to connect before giving up. The default number of attempts to try is 1.

--port=PORT

Sets the SSH connection port. If the SSH port is set both in ~/.prestoadmin/config.json and on the command line, the port specified on the command line will be used.

-r, --reject-unknown-hosts

Aborts when a host is not in the user’s SSH known_hosts file.

--system-known-hosts=SYSTEM_KNOWN_HOSTS

Loads the given SSH known_hosts file before reading the user’s known_hosts file.

-t N, --timeout=N

Sets the network connection timeout to N seconds. The default is 10 seconds.

-T N, --command-timeout=N

Sets the timeout for the given remote command to N seconds. The default is to have no timeout.

-u USER, --user=USER

Sets the user that is used for SSH connections. If the SSH username is set both in ~/.prestoadmin/config.json and on the command line, the username specified on the command line will be used.

-x HOSTS, --exclude-hosts=HOSTS

Sets the list of hosts to be excluded when executing a presto-admin command. The values should be comma-separated and exist in your topology.

--serial

Switches to run the command in serial. The default is to run in parallel, because parallel mode is usually faster. However, if you want a password prompt while the command is running (without specifying -I or --initial-password-prompt), the --serial flag is necessary.