execute docker commands from bash file

Question

How can one run docker commands from a bash (sh) script? I am trying to run:

#!/bin/bash
container= $(docker ps --format "{{.ID}} {{.Names}}" -a | grep testServer | awk '/'$imid'/ { print $1 }');
echo $container

but I get a blank for the container.

TIA

Sorry - it is a leftover. The goal was to get the container name. — Casey Harrils
– Casey Harrils, Commented May 15, 2017 at 16:53
I'd try with a simple docker command hardcoded until you get the printing working as expected. Then start doing clever grep/awk magic. — captncraig
– captncraig, Commented May 15, 2017 at 16:54
Do you really have a space between = and $ in your code, or is that a typo? — chepner
– chepner, Commented May 15, 2017 at 17:05

Community · Accepted Answer · 2017-05-23 12:03:06Z

1

It looks like the container id is printed to sterr and the $() construct only captures stdout.

As per this comment, you can use 2>&1 to redirect stderr to stdout, but I'm not quite sure how to work that into your snippet with the grep/awk chaining going on.

edited May 23, 2017 at 12:03

CommunityBot

11 silver badge

answered May 15, 2017 at 16:53

captncraig

23.3k18 gold badges116 silver badges154 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Pang · Accepted Answer · 2017-05-17 09:05:38Z

0

Did some testing - as suggested - and found that the following works from bash.

#!/bin/bash
container=$(docker ps --format "{{.ID}} {{.Names}}" -a | grep testServer  | awk '/'$imid'/ { print $1 }')
echo $container
if [[ $container = *[!\ ]* ]]; then
        echo "found something";
else
        echo "DID NOT find anything";
fi

I guess I just had to play around with it some more.

edited May 17, 2017 at 9:05

Pang

10.2k146 gold badges87 silver badges126 bronze badges

answered May 15, 2017 at 17:04

Casey Harrils

3,01315 gold badges57 silver badges100 bronze badges

2 Comments

captncraig Over a year ago

Maybe a saner way to do it. Unless you need to capture the exact container id to stop or kill it later.

Casey Harrils Over a year ago

Yes - I need to use the ID for later - so it works as needed

Collectives™ on Stack Overflow

execute docker commands from bash file

2 Answers 2

Comments

2 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

2 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related