Docker - Swarm
If a service is deployed on a Docker Swarm overlay network, what IP address will containers use to communicate across nodes?
If a service is deployed on a Docker Swarm overlay network, what IP address will containers use to communicate across nodes?
medium📝 Command Output Q5 of 15
Step-by-Step Solution
Solution:
Step 1: Understand container communication in overlay networks
Containers get virtual IPs from the overlay network to communicate across hosts.Step 2: Evaluate options
The container's IP address assigned by the overlay network. correctly states containers use overlay-assigned IPs. Options A, B, and C are incorrect because communication is via container IPs, not host or manager IPs, and IPs are assigned.Final Answer:
The container's IP address assigned by the overlay network. -> Option CQuick Check:
Overlay network assigns container IPs for cross-node communication [OK]
Quick Trick: Containers use overlay network IPs, not host IPs [OK]
Common Mistakes:
- Confusing host IP with container IP
- Assuming no IP is assigned
- Thinking manager IP is used for container communication
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