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@robsonke
Last active September 30, 2024 09:34
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This Bash script will loop through all running docker containers on a host and list the disk usage per mount. In case it's breaching the 65%, it will email you.
#!/bin/bash
# get all running docker container names
containers=$(sudo docker ps | awk '{if(NR>1) print $NF}')
host=$(hostname)
# loop through all containers
for container in $containers
do
echo "Container: $container"
percentages=($(sudo docker exec $container /bin/sh -c "df -h | grep -vE '^Filesystem|shm|boot' | awk '{ print +\$5 }'"))
mounts=($(sudo docker exec $container /bin/sh -c "df -h | grep -vE '^Filesystem|shm|boot' | awk '{ print \$6 }'"))
for index in ${!mounts[*]}; do
echo "Mount ${mounts[index]}: ${percentages[index]}%"
if (( ${percentages[index]} > 70 )); then
message="[ERROR] At $host and Docker container $container the mount ${mounts[index]} is at ${percentages[index]}% of its disk space. Please check this."
echo $message
echo $message | mail -s "Docker container $container at $host is out of disk space" "r.sonke@maxxton.com"
fi
done
echo ================================
done
@qwertycody
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loved this, thank you.

@famuyiwadayo
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This is so sweet, Thank you

@cristianghita24
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This helped me a lot, thank you

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ghost commented Feb 22, 2021

This helped me, thank you.

@shivanimmagadda
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shivanimmagadda commented Jun 10, 2021

I am looking for a bash script which list the images which are tagged with another version of image. any example?.

@BaronSam3di
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Smoove! 👍 thanks

@PapsOu
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PapsOu commented Aug 2, 2021

sudo docker ps ? sudo ? You should configure correctly your docker environment...

@imartinflores
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imartinflores commented Sep 24, 2021

Is there any way to add each container to an AssociativeArray , seems like it is not looping through them ,
but just returning the list of them as only 1 item. i.e

for container in $containers
do
myArray+=([key]=$container)
done
echo "${#myArray[@]}"

Is just printing the first container

Am I doing something wrong in there ?
Thanks!

@cottton
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cottton commented May 6, 2022

Should disable this line in the example or at least make the email an example email

echo $message | mail -s "Docker container $container at $host is out of disk space" "r.sonke@maxxton.com"

@robsonke
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robsonke commented May 6, 2022

Should disable this line in the example or at least make the email an example email

echo $message | mail -s "Docker container $container at $host is out of disk space" "r.sonke@maxxton.com"

Oh haha yes, pretty old script. People even copy pasted it without even modifying and sharing me their monitoring emails....

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