Local docker containers as JSON

docker-output-as.json.sh

# How to get docker ps data in JSON format 
# With curl version 7.40 and newer you can get data from the local unix socket, 
# and docker always runs the remote api on docker.sock.
# -----
# knbknb 2019, 2022

# list of all running Docker containers, return names only
curl -s --unix-socket /var/run/docker.sock  http://localhost/images/json | jq .[].Names

# list of all Docker images, return names (RepoTags) only
curl -s --unix-socket /var/run/docker.sock  http://localhost/containers/json | jq -c .[].RepoTags

## construct a filter with jq 
# Names/RepoTags of images _not_ containing "latest" in the inner RepoTags array
curl -s --unix-socket /var/run/docker.sock  http://localhost/images/json |  jq '. - map(select(.RepoTags[] | contains ("latest"))) | .[] .RepoTags[0]'
## found here: 
## How to filter an array of objects based on values in an inner array with jq?
## https://stackoverflow.com/questions/26701538/how-to-filter-an-array-of-objects-based-on-values-in-an-inner-array-with-jq

Sources:

curl -> jq: How to get docker ps data in JSON format

How to filter an array of objects based on values in an inner array with jq?