cloudmesh-inventory.cloudmesh.host.command.host

Module Contents

Classes

HostCommand

class cloudmesh-inventory.cloudmesh.host.command.host.HostCommand

Bases: cloudmesh.shell.command.PluginCommand

do_host(self, args, arguments)

Usage:

host scp NAMES SOURCE DESTINATION [–dryrun] host ssh NAMES COMMAND [–dryrun] [–output=FORMAT] host config NAMES [IPS] [–user=USER] [–key=PUBLIC] host check NAMES [–user=USER] [–key=PUBLIC] host key create NAMES [–user=USER] [–dryrun] [–output=FORMAT] host key list NAMES [–output=FORMAT] host key gather NAMES [–authorized_keys] [FILE] host key scatter NAMES FILE host tunnel create NAMES [–port=PORT] host mac NAMES [–eth] [–wlan] [–output=FORMAT] host setup WORKERS [LAPTOP]

This command does some useful things.

Arguments:

FILE a file name

Options:

--dryrun

shows what would be done but does not execute

--output=FORMAT

the format of the output

–port=PORT starting local port for tunnel assignment

Description:

host scp NAMES SOURCE DESTINATION

TBD

host ssh NAMES COMMAND

runs the command on all specified hosts Example:

ssh red[01-10] “uname -a”

host key create NAMES

create a ~/.ssh/id_rsa and id_rsa.pub on all hosts specified Example:

ssh key create “red[01-10]”

host key list NAMES

list all id_rsa.pub keys from all hosts specifed

Example:

ssh key list red[01-10]

host key gather HOSTS FILE

gathers all keys from file FILE including the one from localhost.

ssh key gather “red[01-10]” keys.txt

host key scatter HOSTS FILE

copies all keys from file FILE to authorized_keys on all hosts, but also makes sure that the users ~/.ssh/id_rsa.pub key is in the file.

1. adds ~/.id_rsa.pub to the FILE only if its not already in it

2. removes all duplicated keys

Example:

ssh key scatter “red[01-10]”

host key scp NAMES FILE

copies all keys from file FILE to authorized_keys on all hosts but also makes sure that the users ~/.ssh/id_rsa.pub key is in the file and removes duplicates, e.g. it calls fix before upload

Example:

ssh key list red[01-10] > pubkeys.txt ssh key scp red[01-10] pubkeys.txt

host config NAMES IPS [–user=USER] [–key=PUBLIC]

generates an ssh config file tempalte that can be added to your .ssh/config file

Example:

cms host config “red,red[01-03]” “198.168.1.[1-4]” –user=pi

host check NAMES [–user=USER] [–key=PUBLIC]

This command is used to test if you can login to the specified hosts. It executes the hostname command and compares it. It provides a table with a sucess column

cms host check “red,red[01-03]”

host	success	stdout
red red01 red02 red03	True True True True	red red01 red02 red03

host tunnel create NAMES [–port=PORT]

This command is used to create a persistent local port forward on the host to permit ssh tunnelling from the wlan to the physical network (eth). This registers an autossh service in systemd with the defualt port starting at 8001.

Example:

cms host tunnel create red00[1-3]

host mac NAMES

returns the list of mac addresses of the named pis.

host setup WORKERS [LAPTOP]

Executes the following steps

cms bridge create –interface=’wlan0’ cms host key create red00[1-3] cms host key gather red00[1-3],you@yourlaptop.local keys.txt cms host key scatter red00[1-3],localhost keys.txt rm keys.txt cms host tunnel create red00[1-3]