Cloud Foundry is an opinionated Platform-as-a-Service that allows you to manage applications at scale. This article is part of a series that explores different facets of a Cloud Foundry deployment using the spring-music project as an example.
This article is Part 2 of a series on Cloud Foundry concepts:
In this particular article, we will create a Cloud Foundry Postgres service to externalize the persistent store instead of using the default in-memory H2 database which is destroyed every time the application is restarted or restaged.
Continue reading “Persisting spring-music data using Postgres service, Part 2”
The Go language with its simplicity, concurrency support, rich package ecosystem, and ability to compile down to a single binary is an attractive solution for writing services on Ubuntu.
However, the Go language does not natively provide a reliable way to daemonize itself. In this article I will describe how to take a couple of simple Go language programs and run them using a systemd service file that starts them at boot time on Ubuntu 16.04.
Continue reading “GoLang: Running a Go binary as a systemd service on Ubuntu 16.04”
ElastAlert from the Yelp Engineering group provides a very flexible platform for alerting on conditions coming from ElasticSearch.
In a previous article I fully describe running interactively on an Ubuntu server, and now I’ll expand on that by running it at system startup using a System-V init script.
One of the challenges of getting ElastAlert to run as a service is that is has a very strict set of module requirements that very easily conflicts with other Python applications, and so we will use Python’s virtualenv to build it in isolation and then call that wrapper from the service script.
Continue reading “ELK: Running ElastAlert as a service on Ubuntu 14.04”
Building services using Spring Boot gives a development team a jump start on many production concerns, including logging. But unlike a standard deployment where logging to a local file is where the developer’s responsibility typically ends, with Docker we must think about how to log to a public space outside our ephemeral container space.
The Docker logging drivers capture all the output from a container’s stdout/stderr, and can send a container’s logs directly to most major logging solutions (syslog, Logstash, gelf, fluentd).
As an added benefit, by making the logging implementation a runtime choice for the container, it provides flexibility to use a simpler implementation during development but a highly-available, scalable logging solution in production.
Continue reading “Docker: Sending Spring Boot logging to syslog”
The Spring framework provides a proven and well documented model for the development of custom projects and services. The Spring Boot project takes an opinionated view of building production Spring applications, which favors convention over configuration.
In this article we will explore how to configure a Spring Boot project to use the Simple Logging Facade for Java (SLF4J) with a Logback backend to send log events to the console, filesystem, and syslog.
Continue reading “Spring: Spring Boot with SLF4J/Logback sending to syslog”