Amazon t2.mikro for Jenkins testing

amazon ec2amazon-web-servicesJenkins

I got 3-4 small projects which I want to test with nightwatch and some up-requests. Is it possible to host jenkins on the small EC2 Instance of Amazon? Since this are only small projects with little income I don´t want to spend too much on the server for jenkins.

Other options? I got a Intel Atom D2700 with 2 GB here, but the fan is annoying as f*.. and jenkins seem to run not very well.

Best Answer

From some reference docs

The amount of memory Jenkins needs is largely dependent on many factors, which is why the RAM allotted for it can range from 200 MB for a small installation to 70+ GB for a single and massive Jenkins master. However, you should be able to estimate the RAM required based on your project build needs.

Each build node connection will take 2-3 threads, which equals about 2 MB or more of memory. You will also need to factor in CPU overhead for Jenkins if there are a lot of users who will be accessing the Jenkins user interface.

It is generally a bad practice to allocate executors on a master, as builds can quickly overload a master’s CPU/memory/etc and crash the instance, causing unnecessary downtime. Instead, it is advisable to set up agents that the Jenkins master can delegate jobs to, keeping the bulk of the work off of the masteritself.

A t2.micro has 1GB of RAM, which may be sufficient for testing. If you run out of RAM just move up to a larger t2 instance. Yes a t2.micro can be free for a year, but a t2.large with 8GB of RAM is only $0.128/hr. Turn it off when you're not using it and all you pay for is disk storage, which is $0.12/GB/month for general purpose SSD network attached storage (EBS).