This interesting tweet by Clare Liguori came to my attention last week: This new img2lambda tool will take the layers of a Docker container and convert them to AWS layers for use in Lambda . I poked around with Clare's example and updated my lambda-php project in order to understand how it works. I …
Today marks a momentous day! I've released 0.94 of rst2pdf to PyPI ! If you have a need to convert plain text files to PDF, check it out. As the last release, 0.93, was December 2012, I think you could have reasonably assumed that the project was abandoned. So why did I bring it back from the dead? …
I use Apple's Reminders app to remind me about things that I need to do. It has the useful feature of syncing across my Mac, iPad and iPhone and I can add to it via Siri in my car. When I am notified on my Mac, a notification alert appears with two buttons: Complete and Later . Clicking Later offers a set of …
For a little website that I'm writing, I thought that I'd use IBM Cloud Object Storage (equivalent to AWS S3) as I'm generating the pages using OpenWhisk on IBM Cloud Functions . The documentation is quite good if you want to use the website, but is a bit spread all over the place if you're using the command …
Like, Simon Wardley , I think that serverless computing is an interesting space because the billing is granular (pay only when your code executes) and you don't need to worry about maintaining and provisioning servers or containers. So much so, that I maintain the Open Source PHP Runtime for Apache OpenWhisk …
As 2018 draws to a close, I take the time to look at the past year as I have done in years past , I look at the photos that I've taken and reminisce about all that I've done this year. January I started the year with ongoing efforts to reduce the pain in my joints and then visited America for CodeMash in …
One of my favourite command line utilities is autojump . It's a small command line utility that allows you to change directory without having to remember exactly where that directory is. For example, to start working on OpenWhisk, I simply type: j openw And the current directory is changed to /Users/rob/Projec…
Incredibly, macOS Mojave comes with Bash 3.22 by default still. Apparently this is due to licensing reasons, however Bash 4 has lots of lovely features including associative arrays that I'd like use. Hence, after reading the Internet for a bit, I've installed it on my Mac. This turned out to require just 3 commands: …
A friend emailed me recently asking about route specific configuration in Slim. He wants to be able to set properties when creating the route that he can pick up when the route is matched. The way to do this is using route arguments. I've written about route arguments before in the context of setting default …
I've recently been updating a website that was written a long time ago that has not been touched in a meaningful way in many years. In addition to the actual work I was asked to do, I took the opportunity to update the password hashing routines. This site is so old that the passwords are stored using MD5 hashes …
Recently I needed to test part of Slim that uses the built-in PHP functions header() and headers_sent() . To do this, I took advantage of PHP's namespace resolution rules where it will find a function within the same namespace first before finding one with the same name in the global namespace. The idea of how to …
I'm currently thinking about upgrading my camera to an EOS R or Z6 and, as result, I'm thinking about which lenses I should get. While discussing options with Stuart , I wondered which were my favourite focal lengths for the photos that I've taken in the past. To work this out, I decided to use the wonderful …
I'm more of a spaces person than a tabs person when it comes to source code and in Vim, I like to see the tab characters, so I have this setting: set listchars=tab:\⇥\ ,trail:·,extends:>,precedes:<,nbsp:+ This places a handy ⇥ character so that I can see the tabs: I'm currently working on a …
These are some notes for working on the OpenWhisk PHP Runtime , but are probably applicable to the other runtimes too. Setting up I have a clone of the runtimes I'm interested in and core side-by-side in a directory. You then need various tools for development, which are documented here for macOS & …
When writing an API, it's common to produce an output that conforms to a known media type such as JSON API or HAL , etc. I'm a strong believer that even though I'm writing an API, my application has a view layer. It's not the same as building an HTML page, but you still need to separate out the code that creates …
Any non-trivial PHP applications use various components to do its work, from PDO though to classes from Packagist. It's fairly common in a standard PHP application to use Dependency Injection to configure and load these classes when necessary. How do we do this in a serverless environment such as OpenWhisk ? This …
As with all serverless offerings OpenWhisk offers an API Gateway to provide HTTP routing to your serverless actions. This provides a number of advantages over web actions , the most significant of which are routing based on HTTP method, authentication and custom domains (in IBM Cloud). Creating routes with the wsk …
Every PHP project I write has dependencies on components from Packagist and my Serverless OpenWhisk PHP projects are no different. It turns out that adding Composer dependencies is trivial. Let's create a simple action that converts a number to it's string form. e.g. 123 becomes one hundred and twenty three …
Serverless Framework is a toolkit to help you mange and deploy a serverless application. (Personally, I'm not a fan of the name as the word "Serverless" already has a meaning in the same space!) It's a useful tool and supports all the major providers, though AWS Lambda seems to be first-among-equals. The OpenWhisk …
I have a project where I need to store a number of items into a data store. I have an OpenWhisk action that stores the items so I wrote an action that takes advantage of the OpenWhisk JS client library to do invoke my store action once for each item in an array that this action receives. This is the JavaScript …