ChatGpt developed Module MMM-Dockerstat

sdetweil

@Rags but are you running this on the docker host? outside any container?

if u run this from INSIDE the container (where MM is running) , does it work?

as I recall, it does not.

I think the command (on the host) is

Usage:  docker exec [OPTIONS] CONTAINER COMMAND [ARG...]

docker exec container_id “docker -ps … rest of parms”

but you will have to use docker command to get the container_id from the name to use in the exec

long time ago, 9 years now, I wrote a whole bunch of scripts to support using docker to deploy and manage a software api testing service…

mumblebaj

@Rags you can drop the -f name portion which will then list all containers running. Maybe change the query to something like the following which should give you some JSON type object which you can then work with.

docker ps --format '{"ID":"{{ .ID }}", "Image": "{{ .Image }}", "Names":"{{ .Names }}, "Status": {{.Status}}"}'

This will return something like the below:

{"ID":"4c57d2ba3fd8", "Image": "getting-started", "Names":"silly_hodgkin, "Status": Up 44 minutes"}

From this you can then extract the container you want and check the status. What I have seen the query only returns all running containers

sdetweil

@mumblebaj but you don’t need to do all that fancy formatting if you are going to extract the info

awk can do that

11e836525b8d   jshridha/blueiris   "/usr/bin/supervisord"   2 years ago   Up 8 months   0.0.0.0:82->81/tcp, :::82->81/tcp, 0.0.0.0:5901->5900/tcp, :::5901->5900/tcp, 0.0.0.0:8280->8080/tcp, :::8280->8080/tcp   blueiris
(base) sam@sams:~/MagicMirror/config$

docker ps | awk ‘{print $1}’

awk can split a string into parts (using some separator char (-F parm, space is default) and then u can print out just the parm u want

also docker ps -q
only displays the container ids.

mumblebaj

@sdetweil Thanks Sam. I just installed Docker for the first time earlier and also learning. :-) Looks fun though. I was looking jq but can’t get that to work, How do i install jq on Docker? Or get it to work off the command line?

sdetweil

@mumblebaj sorry, no idea on jq

i use terminal commands all the time… jq only in nodejs

when I have a terminal command i need output of, I use terminal command tools.

the thing about docker is you can make an image of a ‘thing’ you want to run, and run it everywhere that supports that processor type. independent of OS and you can run multiple instance at the same time (scale up server?) without changing anything inside the image

start up a web server with this content (mapped source folder)
or that content , or both poof a docker command and up you go.

getting the folders mapped to the right place for the ‘thing’ in the container takes a little (tiny amount) work

Rags

@sdetweil said in ChatGpt developed Module MMM-Dockerstat:

@Rags but are you running this on the docker host? outside any container?

if u run this from INSIDE the container (where MM is running) , does it work?

as I recall, it does not.

I think the command (on the host) is
Usage:  docker exec [OPTIONS] CONTAINER COMMAND [ARG...]
docker exec container_id “docker -ps … rest of parms”

but you will have to use docker command to get the container_id from the name to use in the exec

long time ago, 9 years now, I wrote a whole bunch of scripts to support using docker to deploy and manage a software api testing service…

Sorry if i have not been clear. My MagicMirror is in the living room. The MM is running on the first pi( standalone ) not in any container. The second pi in my network is tucked away in my study. This machine is installed with Docker containing multiple containers, which include pihole, wireguard, nginx, apache etc. Occasionally, one or two containers would quit running and I would realise quite late that a particular service is down. That’s why i was trying to build this module so that the status of all containers are known in a jiffy on the MM display.
So when the MM docker module probes the second pi it should just ssh into it and retrieve the docker status easily, format the info in an array and display it. Simple (apparently ).

sdetweil

@Rags got it…

ssh will be the fun part (I think!)

karsten13

@Rags said in ChatGpt developed Module MMM-Dockerstat:

and I would realise quite late that a particular service is down

then docker ps --format "{{.Names}} {{.State}}" maybe is the better choice, State can be one of the following: (created|restarting|running|removing|paused|exited|dead)

Rags

@karsten13 said in ChatGpt developed Module MMM-Dockerstat:

docker ps --format "{{.Names}} {{.State}}

should this command produce an output when run directly on the docker machine? I am not getting any output.!

Docker ps -a gives this output listing all containers whether up or exited. I need to just pickup name and status

Now just need to workout (as Sam says ‘the fun part’) ssh into second pi retrieve the docker ps -a and display.

karsten13

@Rags

missed the -a

❯ docker ps -a --format "{{.Names}} {{.State}}"
magicmirror running
watchtower running
traefik running