How can you check the status of nodes in a Docker Swarm?

To check the status of nodes in a Docker Swarm, the command used is "docker node ls." This command lists all the nodes in the swarm and provides crucial information about each one's status, availability, and role within the swarm.

The information displayed includes whether a node is in a "Ready" or "Down" state, which is essential for monitoring the health and availability of your swarm environment. This command effectively allows system administrators to manage and troubleshoot nodes efficiently, ensuring that the swarm is operating as intended.

The other commands do not provide the same comprehensive overview. For example, while "docker node inspect" can give detailed information about a specific node, it does not list the statuses of all nodes at once. Similarly, "docker node status" and "docker node show" are not valid Docker commands. Thus, "docker node ls" is the most effective and appropriate choice for checking the overall status of nodes in a Docker Swarm.