Docker status report script

docker-status

#!/bin/bash

# This script will run a 'docker ps' comamnd, passing through any arguments, and then run a 'docker inspect' on
# each container to get the bound port information. Exposed but unbound ports are not shown (unlike 'docker ps').
# It also filters out the host '0.0.0.0' since this is the assumed default value for '-p'. It makes the output much cleaner.
# If the docker container is configured with --net that will also be displayed.
# Requires the 'column' command. On my Synology, I get that with `sudo opkg install column`.

#NAMES                  IMAGE                                      STATUS              PORTS
list_names=('NAMES' '-----')
list_image=('IMAGE' '-----')
list_status=('STATUS' '------')
list_ports=('PORTS' '-----')

while IFS=$'\t' read -r id names image status ; do
    list_names+=("$names")
    list_image+=("$image")
    list_status+=("$status")
    ports=$(docker inspect --format='{{if ne .HostConfig.NetworkMode "default"}}--net={{.HostConfig.NetworkMode}}{{end}}{{range $p, $conf := .NetworkSettings.Ports}}{{ if $conf }}, {{if ne (index $conf 0).HostIp "0.0.0.0"}}{{(index $conf 0).HostIp}}:{{end}}{{(index $conf 0).HostPort}}:{{$p}}{{end}}{{end}}' $id | sed 's/^, //')
    list_ports+=("$ports")
done < <(docker ps --format '{{.ID}}\t{{.Names}}\t{{.Image}}\t{{.Status}}' $@)

# get length of an array
tLen=${#list_names[@]}

# loop through all the items in the array and output the contents in a table
for (( i=0; i<${tLen}; i++ ))
do
    echo ${list_names[$i]} $'\x1d' ${list_image[$i]} $'\x1d' ${list_status[$i]} $'\x1d' "${list_ports[$i]}"
done | column -t -s$'\x1d'

example

$ docker-status
NAMES                   IMAGE                                       STATUS         PORTS
-----                   -----                                       ------         -----
homeassistant           homeassistant/home-assistant                Up 2 days      --net=host
unbound                 unbound-custom                              Up 2 weeks     53:53/tcp, 53:53/udp
mqtt                    2bytes/mqtt:1.0.2                           Up 4 weeks     --net=mosquittodockermaster_default, 1883:1883/tcp, 2883:2883/tcp, 127.0.0.1:3883:3883/tcp
$ docker-status -a    
NAMES                   IMAGE                                       STATUS         PORTS
-----                   -----                                       ------         -----
elated_noyce            ubuntu                                      Created        
homeassistant           homeassistant/home-assistant                Up 2 days      --net=host
unbound                 unbound-custom                              Up 2 weeks     53:53/tcp, 53:53/udp
mqtt                    2bytes/mqtt:1.0.2                           Up 4 weeks     --net=mosquittodockermaster_default, 1883:1883/tcp, 2883:2883/tcp, 127.0.0.1:3883:3883/tcp
$ docker start elated_noyce
elated_noyce
$ docker-status -a         
NAMES                   IMAGE                                       STATUS                      PORTS
-----                   -----                                       ------                      -----
elated_noyce            ubuntu                                      Exited (0) 2 seconds ago    
homeassistant           homeassistant/home-assistant                Up 2 days                   --net=host
unbound                 unbound-custom                              Up 2 weeks                  53:53/tcp, 53:53/udp
mqtt                    2bytes/mqtt:1.0.2                           Up 4 weeks                  --net=mosquittodockermaster_default, 1883:1883/tcp, 2883:2883/tcp, 127.0.0.1:3883:3883/tcp