Store output diskspace df -h JSON

Question

I am attempting to gather basic disk space information from a server using a bash script, and store the output in JSON format. I am looking to record the available & use

Answer 1

The following does what you want, with the only requirement external to bash being a Python interpreter:

python_script=$(cat <<'EOF'
import sys, json

data = {'diskarray': []}
for line in sys.stdin.readlines():
    mount, avail, total = line.rstrip(';').split()
    data['diskarray'].append(dict(mount=mount, spacetotal=total, spaceavail=avail))
sys.stdout.write(json.dumps(data))
EOF
)

df -Ph | awk '/^\// { print $1" "$2" "$3";" }' | python -c "$python_script"

An alternate implementation using jq might look like this:

df -Ph | \
  jq -R -s '
    [
      split("\n") |
      .[] |
      if test("^/") then
        gsub(" +"; " ") | split(" ") | {mount: .[0], spacetotal: .[1], spaceavail: .[2]}
      else
        empty
      end
    ]'