docker-swarm

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Last edited Oct 10, 2019

Created on Oct 10, 2019

This example demonstrates a Docker Swarm deployment of a PHP application behind an Nginx load balancer, using a Compose file to define the service topology. The visualization shows the network layer with an overlay network bridging the webapp replicas and the manager-node proxy, while the Nginx configuration references an upstream cluster with multiple server IPs. The PHP container serves a simple script that echoes the container’s hostname and IP, illustrating dynamic scaling behavior. The code relies on Docker Compose’s `deploy` keys for replica counts, update parallelism, and placement constraints.

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