Docker Object Tools

dockercat

#! /bin/sh

# dockercat - Print Docker config or secret object
# Copyright (C) 2021 Matous Jan Fialka, <https://mjf.cz/>
# Released under the terms of the "MIT License"

PROGRAM="${0##*/}"

if [ $# -eq 0 -o $# -ne 2 ]; then
  echo "Usage: $PROGRAM { config | secret } OBJECT" >&2
  exit 1
fi

case "$1" in
  'config' | 'secret')
    ;;
  *)
    echo "$PROGRAM: Unsupported object '$1'" >&2
    exit 2
esac

docker $1 inspect --format='{{.Spec.Data}}' --pretty "$2" |sed '1,/^Data:/d;${/^$/d}'

# vi:ft=sh

dockeredit

#! /bin/sh

# dockeredit - Edit Docker service config or secret object
# Copyright (C) 2021 Matous Jan Fialka, <https://mjf.cz/>
# Released under the terms of the "MIT License"

# WARNING: The service gets updated twice to keep the original object name!

PROGRAM="${0##*/}"

if [ $# -eq 0 -o $# -ne 4 ]; then
  echo "Usage: $PROGRAM { config | secret } SERVICE OBJECT PATH" >&2
  exit 1
fi

case $1 in
  'config' | 'secret')
    ;;
  *)
    echo "$PROGRAM: Unsupported object '$1'" >&2
    exit 1
    ;;
esac

tid="$(mktemp -q -u 'XXXXX')"
tmp="/tmp/$PROGRAM-$1-$2-$3-$tid.tmp"

cat <<- EOT
$PROGRAM: Using temporary identifier '$tid'
$PROGRAM: Using temporary file '$tmp'
EOT

if ! dockercat $1 "$3" >"$tmp"; then
  exit $?
fi

if ! ${EDITOR:-vi} "$tmp"; then
  exit $?
fi

if docker $1 create "$3.$tid" "$tmp" >/dev/null; then
  if docker service update -qd --update-failure-action rollback --$1-rm "$3" --$1-add source="$3.$tid",target="$4" "$2" >/dev/null; then
    if docker $1 rm "$3" >/dev/null; then
      if docker $1 create "$3" "$tmp" >/dev/null; then
        if docker service update --update-failure-action rollback --$1-rm "$3.$tid" --$1-add source="$3",target="$4" "$2"; then
          if docker $1 rm "$3.$tid" >/dev/null; then
            rm -f "$tmp"
          fi
        fi
      fi
    fi
  fi
fi

# vi:ft=sh