GoLang: Running a Go binary as a systemd service on Ubuntu 16.04

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.

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ELK: Connecting to ElasticSearch with a Go client

ElasticSearch very often serves as a repository for monitoring, logging, and business data.  As such, integrations with external system are a requirement.

The Go programming language with its convenient deployment binary and rich set of packages can easily serve as a bridge between these systems and the ElasticSearch server.

We will use the olivere/elastic package for this purpose, it is well maintained and has support for both ElasticSearch 5.x and 2.x depending on your import statement.  In this article, we will be hitting an ElasticSearch 2.x backend.

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GoLang: Running a Go binary as a SysV service on Ubuntu 14.04

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, run them using SystemV init scripts with their own process owner, standard logs, and started at boot time on Ubuntu 14.04.

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Zabbix: Sending Zabbix metrics using a Go client

The open-source Zabbix monitoring solution has a published, simple binary protocol that allows you to send metrics to the Zabbix server without relying on the Zabbix Agent – which makes it very convenient for integration with other parts of your infrastructure.

In this article, I’ll show how to use the go-zabbix package for sending metrics to the Zabbix server.  If instead you were looking to manipulate the backend server definitions (host, templates, hostgroups, etc.) using the REST API, then see my other article here.

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GoLang: Glide for Go language package management

Downloading 3rd party packages from github is made very simple in the Go language with the import statement. But similar to other languages, the complexity of versions and inter-dependencies begs the use of a package manager for any projects that are non-trivial (think npm for Javascript, pip for Python, Maven for Java, etc.).

Glide is a package manager for the Go programming language that can greatly ease the chore of package management by supporting package independence between projects, versioning, and non-master branches.

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Zabbix: Zabbix REST API using a Go client

The open-source Zabbix monitoring solution has a REST API that provides the ability for deep integrations with your existing monitoring, logging, and alerting systems.

This fosters development of community-driven modules like Ryan Day’s zabbix Go language package, which is an easy way to automate Zabbix tasks like creating hosts and manipulating other back end structures.

One of the nice things about the Go language is that libraries are generally statically linked into a single executable, so you only need to copy over a single executable.  You don’t have to copy 3rd party jars (Java) or require an internet connection to pypi from production system (Python).

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GoLang: Vendor directory for github branches other than master

Using 3rd party packages from github is made very simple in the Go language with the import statement.  But one problem is that “go get” will always pull the HEAD of the master branch and there is no way to explicitly specify another branch.

The ultimate answer would be to use a package dependency manager like Glide, which I describe in this article.  But if you cannot introduce Glide into your workflow yet then manually populating the vendor directory (enabled by default since 1.6) is a viable alternative.

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GoLang: Cross Compiling for Linux and Windows platforms

A nice feature of the Go language is the ability to build binaries for multiple platforms directly from a single source system.  As an example, even from a development Windows 7 32-bit machine, you can build binaries for both 64 bit Linux and Windows 2012 Servers.

Before Go 1.5, you needed a compiler for the target architecture, but now that the entire tool chain is written in Go, building for multiple architectures is easy.

And unlike other languages where additional external libraries need to be copied or downloaded on the target system, Go dependencies are generally statically linked [1,2,3,4] into a single binary which makes portability that much easier.

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GoLang: Installing the Go Programming language on Ubuntu 14.04

The Go programming language has gotten considerable momentum, and the fact that it compiles down to machine code has made it popular in containers like Docker where a single executable binary fits the execution model perfectly.

This article will detail installation on Ubuntu 14.04 with the standard hello world validation.

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