January 2019
Intermediate to advanced
484 pages
11h 48m
English
Content preview from DevOps with Kubernetes - Second Edition
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Stateless and stateful applications
Stateless applications don't need to preserve the application or user data on the disk volume. Although stateless applications may write the data to the filesystem while a container exists, it is not important in terms of the application's life cycle.
For example, the tomcat container runs some web applications. It also writes an application log under /usr/local/tomcat/logs/, but it won't be affected if it loses a log file.
But what if you need to persist an application log for analysis or auditing? In this scenario, Tomcat can still be stateless but share the /usr/local/tomcat/logs volume with another container such as Logstash (https://www.elastic.co/products/logstash). Logstash will then send a log to ...
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