Docker for the Absolute Beginner - Hands-On - Docker Swarm

The video provides an introduction to Docker Swarm, explaining its purpose and basic concepts. It covers setting up a Docker Swarm cluster, designating manager and worker nodes, and initializing the Swarm. The tutorial discusses running applications in a Swarm environment, highlighting the challenges of manual deployment and the benefits of orchestration. Docker Swarm orchestration is introduced, focusing on Docker services and the creation of multiple application instances across nodes. The video concludes with a brief overview of advanced topics and a transition to Kubernetes.

What is the primary role of the manager node in a Docker Swarm cluster?

• To execute all Docker commands

• To manage and orchestrate the cluster

• To store all application data

• To act as a backup server

Why is manually running Docker commands on each node not ideal?

• It requires a lot of storage space

• It is time-consuming and error-prone

• It requires special hardware

• It increases network traffic

What does Docker Swarm orchestration help automate?

• Database management

• Network configuration

• Service distribution and load balancing

• User authentication

What command is used to create a Docker service in a Swarm cluster?

• docker run

• docker swarm init

• docker build

• docker service create

Which option is used with the 'docker service create' command to specify the number of instances?

• --instances

• --replicas

• --copies

• --nodes