Introduction

Connect to multiple ssh/docker hosts "in tmux".

intmux is a command line application to connect to multiple ssh/docker hosts within a tmux session. Supports connections to SSH hosts, local docker and docker-compose.

For each matching host intmux will create a new pane (up to --tmux-panes per window) and set the tmux synchronize-panes options (pass --tmux-no-sync to turn this off), and run a shell (configurable via --command, --script or other switches specific to the connection method).

You can intmux inside a tmux session (creates a new session within it) or out.

See a demo

SSH

The following command creates a new tmux session with one window with two panes (one ssh'd to host1, another to user@host2):

intmux ssh host1 user@host2

# Connect to hosts listed in inputfile.txt
intmux -i inputfile.txt ssh

# Connect to hosts, with a separate window for each host
intmux --tmux-panes 1 ssh host1 user@host2

# Connect and tail the syslogs:
intmux --command 'sudo tail -f /var/log/syslog' ssh host1 user@host2

# Run a script (copies local script to remote host, and executes it)
intmux --script ./local_script.sh ssh host1 user@host2

The 'ssh' command can be customized, for alternate connection methods such as mosh:

intmux ssh --ssh-command mosh host1 user@host2

Docker

intmux can also be used to connect to all running local docker instances:

# Connect to all local containers
intmux docker

# Connect to specific containers
intmux docker a_name f947ff94a995

# Look at logs on hosts:
intmux docker --docker-command 'logs -f' a_name f947ff94a995

Docker containers can also be connected to over SSH:

# Connect to all remote containers on two different hosts
intmux ssh-docker host1 user@host2

# Connect to specific containers
intmux ssh-docker --docker-containers "a_name,f947ff94a995" host1 user@host2

# Look at logs on hosts:
intmux ssh-docker --docker-command 'logs -f' --docker-containers "a_name,f947ff94a995" host1 user@host2

Docker-compose

All running services of the docker-compose in your current working directory can also be connected to:

# Connect to all containers
intmux compose

# Connect to specific containers:
intmux compose db web

Installation

Execute:

pip install intmux

Help

Main help:

intmux --help

usage: intmux [-h] [--log LOG] [--command COMMAND] [--input INPUT]
              [--script SCRIPT] [--tmux-panes PANES] [--tmux-sync]
              [--tmux-session SESSION]
              {ssh,docker,ssh-docker,compose} ...

Connect to several hosts in a tmux session.

positional arguments:
  {ssh,docker,ssh-docker,compose}
                        sub-command help
    ssh                 Connect to hosts via SSH
    docker              Connect to docker containers via 'docker exec'
    ssh-docker          Connect to docker containers on remote SSH hosts
    compose             Connect to docker containers associated with current
                        docker-compose via 'docker exec'

optional arguments:
  -h, --help            show this help message and exit
  --log LOG, -l LOG     Log level (default: WARN)
  --command COMMAND, -c COMMAND
                        Command to execute when connecting to a remote host
  --input INPUT, -i INPUT
                        Read list of hosts from input file when provided.
  --script SCRIPT, -s SCRIPT
                        Execute commands in local file remotely (executes over
                        --command option)
  --tmux-panes PANES, -p PANES
                        Max tmux panes per window (default: 6)
  --tmux-no-sync, -S    Do not run tmux's set-option synchronize-panes
  --tmux-session SESSION, -t SESSION
                        tmux session name (default: intmux)

SSH help:

intmux ssh -h

usage: intmux ssh [-h] [--ssh-options SSH_OPTIONS] [hosts [hosts ...]]

Connect to the provided hosts.

positional arguments:
  hosts                 SSH hosts to connect to.

optional arguments:
  -h, --help            show this help message and exit
  --ssh-command SSH_COMMAND, -sc SSH_COMMAND
                        SSH command (default: ssh)
  --ssh-options SSH_OPTIONS, -so SSH_OPTIONS
                        Options to pass to SSH connection.

Docker help:

intmux docker -h

usage: intmux docker [-h] [--docker-command DOCKER_COMMAND] [--approximate]
                     [hosts [hosts ...]]

Connect to the provided running containers

positional arguments:
  hosts                 List of docker containers to connect to (default:
                        connect to all containers)

optional arguments:
  -h, --help            show this help message and exit
  --docker-command DOCKER_COMMAND, -dc DOCKER_COMMAND
                        Docker command to execute (default: 'exec -it {}
                        bash'). If '{}' is included in the command, the docker
                        host is substituted there, the host is appended. NOTE:
                        may invalidate any --script/--command parameters if a
                        shell is not provided.
  --approximate, -a     Include any docker container names that only partially
                        match hosts.

Docker Compose help:

intmux compose -h

usage: intmux compose [-h] [--docker-command DOCKER_COMMAND] [--approximate]
                      [hosts [hosts ...]]

Connect to containers associated with the docker-compose in the current
directory.

positional arguments:
  hosts                 List of docker containers to connect to (default:
                        connect to all containers)

optional arguments:
  -h, --help            show this help message and exit
  --docker-command DOCKER_COMMAND, -dc DOCKER_COMMAND
                        Docker command to execute (default: 'exec -it {}
                        bash'). If '{}' is included in the command, the docker
                        host is substituted there, the host is appended.
  --approximate, -a     Include any docker container names that only partially
                        match hosts.

SSH Docker help:

intmux ssh-docker -h

usage: intmux ssh-docker [-h] [--ssh-options SSH_OPTIONS]
                         [--docker-containers DOCKER_CONTAINERS]
                         [--docker-command DOCKER_COMMAND] [--approximate]
                         [hosts [hosts ...]]

Connect to docker containers on provided SSH hosts

positional arguments:
  hosts                 SSH hosts to connect to.

optional arguments:
  -h, --help            show this help message and exit
  --ssh-options SSH_OPTIONS, -so SSH_OPTIONS
                        Options to pass to SSH connection.
  --docker-containers DOCKER_CONTAINERS, -dC DOCKER_CONTAINERS
                        Comma separated list of docker containers to connect
                        to (default: connect to all containers)
  --docker-command DOCKER_COMMAND, -dc DOCKER_COMMAND
                        Docker command to execute (default: 'exec -it {}
                        bash'). If '{}' is included in the command, the docker
                        host is substituted there, the host is appended. NOTE:
                        may invalidate any --script/--command parameters if a
                        shell is not provided.
  --approximate, -a     Include any docker container names that only partially
                        match hosts.

Notes

--script and --command will make multiple connections over SSH (one can send keys over tmux, but not easily track success of without capturing the result of $?, so shell commands have been string together with &&). Maybe I'll fix that some day, but in the meantime, to limit the number of connections I suggest turning on SSH ControlMaster settings by adding the following to your .ssh/config file:

ControlMaster auto
ControlPersist 60s
ControlPath /tmp/ssh-%h-%p-%r