The ramblings of a computer geek
You can deploy an NFS server onto an Ubuntu Linux server to allow you to provide NFS exports to other machines on your network. The documentation below provides a very quick guide on how to do this. It assumes you have a Ubuntu Linux 22.04 LTS machine with some storage attached that you want to […]
More...We needed to install Ruby 2.7 instead of what normally comes with Ubuntu 20.04 LTS, if we installed a later than 2.7 Ruby version, the particular application (i.e. Staytus in this case) would barf. The nice people at BrightBox have created some packaged installs of Ruby at various versions.https://www.brightbox.com/docs/ruby/ubuntu/#adding-the-repositoryhttps://launchpad.net/~brightbox/+archive/ruby-ng (Latest version supported 20.04) We first […]
More...Sometimes it is helpful just to get a script running on a machine to generate some disk IO load. I use this for two main reasons, one is during the testing or proving of a storage platform in terms of its availability during a fail-over or maintenance situation (e.g. it’s storage processors), the other is […]
More...During some upcoming changes I needed to test a mobile application to use a test IP address for a standard hostname. Problem is, I didn’t want to root my Android phone to be able edit the hosts file. There are apps such as “Hosts Go”, but in my case these didn’t work. On a normal […]
More...Just a quick one, let’s say you need to tunnel some traffic over an SSH tunnel, its pretty simple to setup, in this example I’m wanting a local port 3128 on my local machine to be tunnelled over the SSH session to a remote server via another server (i.e. an SSH gateway). Okay, let’s break […]
More...So you have a Python script (for example), and you need to store some access credentials for an API it accesses (for example), now you could put the username and password in the script. There’s lots of reasons not to do this however, a key one being that if you are using a version control […]
More...If you try to monitor a cloudflare fronted website with NagiosXI check_http you may get this: After much fiddling found that if you formulate the check string as: You’ll get a result like this, which is what we want! You need to use this: Enable SSL/TLS hostname extension support (SNI) The SNI is Server Name […]
More...https://microk8s.io/docs/registry-images So images. A container is based on an image. You can pull these images in from the outside world, e.g. from a Public, Private registry, or from the built-in registry. For this copy the “hello-python” directory we created in Part 2 into one called “hello-python3”, you can delete the .tar file in there for […]
More...Well Part 2 was very long, so lets have a shorter one and cover how you can adjust your application on the fly and add the other worker nodes to the cluster. Updating an Application or Service on the Fly Kubernetes is a system whereby you declare what you want the “world” to look like, […]
More...Log onto your master node via SSH. We’re going to build an image and then deploy it, so as a developer you’d probably be developing on your own machine possibly running docker locally to test how your containers work before deploying the code to a repository where it can then be applied to a production […]
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