Swarm mode initialization in Docker - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the command to initialize Docker Swarm mode on the current machine.

Docker

docker swarm [1]

Drag options to blanks, or click blank then click option'

Alaunch

Bstart

Ccreate

Dinit

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'start' instead of 'init' which is not a valid swarm command.

Using 'create' or 'launch' which are not Docker swarm commands.

The docker swarm init command initializes the current machine as a Swarm manager.

2fill in blank

medium

Complete the command to specify the advertise address when initializing Docker Swarm.

Docker

docker swarm init --advertise-addr [1]

Drag options to blanks, or click blank then click option'

Alocalhost

B192.168.1.100

C0.0.0.0

D255.255.255.0

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'localhost' which is not reachable by other nodes.

Using '0.0.0.0' which is a wildcard and invalid here.

Using a subnet mask like '255.255.255.0' instead of an IP address.

The --advertise-addr option requires the IP address that other nodes will use to connect to this manager.

3fill in blank

hard

Fix the error in the command to initialize Docker Swarm with a specific listen address.

Docker

docker swarm init --listen-addr [1]

Drag options to blanks, or click blank then click option'

A192.168.1.100:2377

Blocalhost:2377

C192.168.1.100

D0.0.0.0

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting the port number after the IP address.

Using 'localhost' which is not reachable by other nodes.

Using '0.0.0.0' which is invalid here.

The --listen-addr option requires an IP address and port, usually port 2377 for Swarm communication.

4fill in blank

hard

Fill both blanks to create a command that initializes Docker Swarm with a specific advertise and listen address.

Docker

docker swarm init --advertise-addr [1] --listen-addr [2]

Drag options to blanks, or click blank then click option'

A192.168.1.101

B192.168.1.102:2377

C192.168.1.101:2377

Dlocalhost

Attempts:

3 left

💡 Hint

Common Mistakes

Using IP with port for advertise address.

Using IP without port for listen address.

Using 'localhost' which is not valid for these options.

The advertise address is just the IP, while the listen address includes IP and port.

5fill in blank

hard

Fill all three blanks to create a command that initializes Docker Swarm with a specific advertise address, listen address, and a custom data path.

Docker

docker swarm init --advertise-addr [1] --listen-addr [2] --data-path-port [3]

Drag options to blanks, or click blank then click option'

A192.168.1.110

B192.168.1.110:2377

C4789

D2377

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing listen port with data path port.

Using IP with port for advertise address.

Using invalid port numbers.

The --data-path-port option sets the port for overlay network data traffic, default is 4789.