Adding your key to google cloud project metadata

add-gcloud-key.sh

#!/bin/bash
# Usage: add-gcloud-key.sh [PROJECT_ID]

set -eu

# Change these two lines
# USER=<your user name>
KEY="$HOME/.ssh/your_key.pub"

PROJECT="${1:+--project=$1}"

KEY_DATA="$(awk '{print $1, $2;}' $KEY)"
KEYS_FILE=$(mktemp ${TMP:-/tmp}/gcloud-keys-XXXXXX)
trap "rm -f '$KEYS_FILE'" HUP PIPE INT QUIT TERM EXIT

echo "Getting the current data..."
gcloud $PROJECT compute project-info describe | grep -ve '- key: sshKeys' | grep ssh | sed -r 's/^\s+//g' > "$KEYS_FILE"
if grep "^$USER:" "$KEYS_FILE"; then
    echo 'Key already exists'
    exit 0
fi

echo "Adding the key..."
echo "$USER:$KEY_DATA google-ssh {\"userName\":\"$USER\",\"expireOn\":\"2120-01-01T20:00:00+0000\"}"  >> "$KEYS_FILE"
gcloud $PROJECT compute project-info add-metadata --metadata-from-file sshKeys="$KEYS_FILE"

echo DONE