November 2017
Intermediate to advanced
298 pages
7h 10m
English
Content preview from Deployment with Docker
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The web server
Our web server changes will be a bit trickier due to a quirk/feature of the NGINX configuration processing that may also impact you if you do Java-based DNS resolution. Essentially, NGINX caches DNS entries so hard that effectively, once it reads the configuration files, any new DNS resolution within that configuration will not actually take place at all unless some extra flags ( resolver ) are specified. With the Docker service being constantly mutable and relocatable, this is a serious issue that must be worked around to function properly on the Swarm. Here, you have a couple of options:
- Run a DNS forwarder (such as dnsmasq) in parallel with NGINX and use that as the resolver. This requires running both dnsmasq and NGINX ...
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