Using Bash with Docker API to get the CLI bundle

Refer to the following steps:

1. Before you start the process of downloading the command-line bundle through the API, make sure that you have the curl, jq (a lightweight formatter for JSON payloads), and unzip utilities installed:

sudo apt-get update && sudo apt-get install curl jq unzip

1. Now, get the bearer token and call the API to retrieve the CLI files. Be sure to replace <ucp-ip> with the IP or DNS of your Docker PoC IP:

# Stash your Bearer token in an environment variable
AUTHTOKEN=$(curl -sk -d '{"username":"<username>","password":"<password>"}' https://<ucp-ip>/auth/login | jq -r .auth_token)

# Download the client certificate bundle
curl -k -H "Authorization: Bearer $AUTHTOKEN" https://<ucp-ip>/api/clientbundle -o bundle.zip

# Unzip the bundle.
unzip bundle.zip

# Run the utility script.
eval "$(<env.sh)"

# You are connected to the cluster - test it. 
docker node ls
... listing of your Docker Enterprise nodes