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ssh-para

Parallel SSH jobs manager CLI (alternative to parallel-ssh)

Take a look at run-para if you need to run parallel jobs parameterized

ssh-para3

installation

pip install ssh-para

By default, ssh-para uses Nerd Fonts glyphs, modern terminals can now render the glyphs without installing specific font (the symbols can be overridden with SSHP_SYM_* environment variables, see below)

quick start

Run command on multiple hosts:
$ ssh-para -H host1 host2 host3 -- echo connection ok
Review last run results:
$ ssh-para -l
Review hosts statuses for last run:
$ ssh-para -L *.status
View failed hosts list:
$ ssh-para -L failed.status
Show output of command on all hosts:
$ ssh-para -L *.out
Show output of command for failed hosts:
$ ssh-para -L *.failed
Show output of command for host1:
$ ssh-para -L host1.out

usage

ssh-para -h
usage: ssh-para [-h] [-V] [-j JOB] [-d DIRLOG] [-m MAXDOTS] [-p PARALLEL] [-t TIMEOUT] [-r] [-v] [-D DELAY]
                [-f HOSTSFILE | -H HOSTS [HOSTS ...] | -C {bash,zsh,powershell} | -l | -L LOGS [LOGS ...]] [-s SCRIPT]
                [-a ARGS [ARGS ...]]
                [ssh_args ...]

ssh-para v1.ssh-para.dev

positional arguments:
  ssh_args

options:
  -h, --help            show this help message and exit
  -V, --version         ssh-para version
  -j JOB, --job JOB     Job name added subdir to dirlog
  -d DIRLOG, --dirlog DIRLOG
                        directory for ouput log files (default: ~/.ssh-para)
  -m MAXDOTS, --maxdots MAXDOTS
                        hostname domain displaylevel (default:1 => short hostname, -1 => fqdn)
  -p PARALLEL, --parallel PARALLEL
                        parallelism (default 4)
  -t TIMEOUT, --timeout TIMEOUT
                        timeout of each job
  -r, --resolve         resolve fqdn in SSHP_DOMAINS
  -v, --verbose         verbose display (fqdn + line for last output)
  -D DELAY, --delay DELAY
                        initial delay in seconds between ssh commands (default=0.3s)
  -f HOSTSFILE, --hostsfile HOSTSFILE
                        hosts list file
  -H HOSTS [HOSTS ...], --hosts HOSTS [HOSTS ...]
                        hosts list
  -C {bash,zsh,powershell}, --completion {bash,zsh,powershell}
                        autocompletion shell code to source
  -l, --list            list ssh-para results/log directories
  -L LOGS [LOGS ...], --logs LOGS [LOGS ...]
                        get latest/current ssh-para run logs
                        -L[<runid>/]*.out          : all hosts outputs
                        -L[<runid>/]<host>.out     : command output of host
                        -L[<runid>/]*.<status>     : command output of hosts <status>
                        -L[<runid>/]*.status       : hosts lists with status
                        -L[<runid>/]<status>.status: <status> hosts list
                        -L[<runid>/]hosts.list     : list of hosts used to connect (resolved if -r)
                        default <runid> is latest ssh-para run (use -j <job> -d <dir> to access logs if used for run)
                        <status>: [success,failed,timeout,killed,aborted]
  -s SCRIPT, --script SCRIPT
                        script to execute
  -a ARGS [ARGS ...], --args ARGS [ARGS ...]
                        script arguments

During run, use :

Environment variables:

Activate autocompletion:

Example

Patch redhat family hosts:

ssh-para -p 20 -f hostlist.txt -- 'sudo yum update -y;sudo shutdown -r +1'

Use specific ssh options / config (everything after -- will be passed to ssh command as is):

ssh-para -p 20 -H host1 host2 -- -F ~/.ssh/myconfig echo connect ok

Launch local script with argument on remote hosts:

ssh-para -p 20 -f hosts.txt -s ./myscript -a status

Extend limited resolv.conf search domains (try to resolve host in each domain, first resolved in the domain list is used as fqdn):

SSHP_DOMAINS="domain1.com domain2.com" ssh-para -r -H host1 host2 -- echo connect ok

Tips