micro-healthchecks

This is a sample collection of tiny web server scripts that perform health checks / pings on internal services. Each of these scripts has only one function -- to report whether or not they could connect to a service. Additionally, these scripts should have as few dependencies as possible. These serve as supporting examples of a blog post about creating micro health check API endpoints for services that your APIs depend on. The original blog post can be found here: https://blog.runscope.com/posts/build-a-health-check-api-for-services-underneath-your-api

The interface for these scripts is minimal. They're intended to be requested via HTTP GET on a web server that supports the script's language with no required inputs in the URI, headers or body.

If the test is successful, the HTTP response code is 200 -- otherwise, it's 503. The response output is JSON and will be one of the two following responses:

{
 "status":"Connection successful"
}

or

{
 "status":"Unable to connect"
}

PHP

####MySQL > php/mysqlConnect.php This script uses PHP's internal mysqli extension. A valid username and password is required. $config['server] includes hostname and port number (e.g. 127.0.0.1:3306).

Python

####Redis > python/redisConnect.py This script requires the well supported redis-py library (GitHub link), which is installable by pip, easy_install or from source. The server hostname (or IP), port and database number are required config parameters.

####MongoDB > python/mongoConnect.py This script requires PyMongo (link), which is installable by pip, easy_install or from source. The server URI is required. This does not try to connect to a specific database, nor is it using ping. It only attempts to establish a client connection.

Perl

####DNS > perl/dnsConnect.py This script requires Net::DNS which is most easily installed using CPAN.

.Net

####MS SQL Server > dotnet/mssqlConnect.cs This is a Web API Controller class that can be dropped into any ASP.NET Web API enabled project. The server connection string parameters need to be supplied.

License

See LICENSE file in repo.