...
If the master node is not on the same host as the deploy node, the user that runs the deploy playbooks must have an account on the master host under the same name, and that account must have sudo privileges like the account on the deploy node (see above). Also, the account should have password-less SSH login configured. See the description of configuring password-less login for the edge node administrator account in the Preparing Edge Nodes section.
The following command will prepare the master node for use:
ansible-playbook -i ./hosts master_install.yml --ask-become-pass
This playbook requires the password for sudo on the master node (the "become" password).
It will perform the following initialization tasks:
- Make sure there are entries for the master and edge node names in
/etc/hosts - Install required software packages including Docker, Kubernetes, pip, and mosquitto
- Install Python packages used by other playbooks (
kubernetesandcryptography) - Make sure the user can run docker commands
- Prepare basic configuration for Docker and Kubernetes
- Set up a user name and password for the MQTT service
Note, you can customize the MQTT user name and password using the mqtt_user and mqtt_pwd variables in the docker/playbook/group_vars/all/mqtt.yml file. These credentials must be used if you want to, for example, use the mosquitto_sub command to monitor incoming MQTT messages from the edge nodes the Python package kubernetes.
Creating the Docker Registry
...