Docker Swarm Cluster: Adding Worker Nodes, Manager Roles, and Starting the Service
In this video, we'll continue our Docker Swarm practice by creating a fully functional cluster with multiple nodes. I'll show you which ports need to be opened in the firewall, why it's important to check the Docker version on all nodes, and how to add new nodes to the cluster using Docker Swarm Join.
We'll explore the difference between a worker and a manager node, why Swarm management commands are only executed on the manager node, how to obtain a join token for a worker or manager node, and how to promote a worker to a manager node using Docker Node Update. Afterwards, we'll create an Nginx service with three replicas and see how Swarm distributes tasks across different nodes and provides access via a routing mesh. This is based on the downloaded scenario.