Kubernetes in Google Cloud – Part 1: the etcd cluster
So, I’ve been getting Kubernetes running (following Kelsey Hightower’s tutorial), you need an etcd/fleetd cluster running, and here’s how to get up to speed with that in the Google Cloud.
Category: Development
Building an image with an artifact inside it on a Mac
Prior to Docker 1.3, you couldn’t mount your Mac directories into your container. This is because Docker itself ran in a VirtualBox environment (boot2docker started this VM), so attempts to mount directories would be referencing the VM. Sure, there were …
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Docker Linking
Quick into to Docker’s automagic container linking. If you’re running on a single host and need containers to talk to each other, then this is worth a look.
Selenium, GhostDriver / PhantomJS and self-signed certificates
If you’re using self-signed HTTPS certificates and find your Selenium + GhostDriver (PhantomJS) scripts failing with a blank HTML page, you might need to tell PhantomJS to ignore SSL errors:- DesiredCapabilities dCaps = new DesiredCapabilities(); dCaps.setJavascriptEnabled(true); dCaps.setCapability(PhantomJSDriverService.PHANTOMJS_CLI_ARGS, new String[]{"–web-security=no", "–ignore-ssl-errors=yes"}); …
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Validating HTML source using Selenium and w3.org
So, you have an Ajax app and want some way to perform HTML validation. How about using Selenium (to ensure your Ajax app is rendered) and W3.org’s validator?
Docker v1.1.2 and a presentation
If you’re upgrading from Docker v1 on a Mac, there’s now a formal Docker installer. But if you’ve previously used Brew like me, I would ensure you do:- boot2docker stop boot2docker delete brew unlink docker brew unlink boot2docker boot2docker stop …
DropWizard to Twitter
A quick example of creating a DropWizard service to post to Twitter. You’ll need to register a new app with Twitter, and note down the API keys so it works with your account (instructions provided if you’ve never done this).
Update Docker on MacOS
Given Docker is now 1.0, and I was using 0.11 (which has a vulnerability which allows programs to break out from their Docker container), it’s time to upgrade my version running on MacOS. To upgrade the virtual machine:- boot2docker stop …
DropWizard and AWS
Time to make use of Amazon’s AWS offerings – specifically the Simple Storage Service. tl;dr / Executive Summary:- $ curl -L -O https://github.com/AndrewGorton/AwsFileStorage/archive/v1.0.0.zip $ unzip v1.0.0.zip $ cd AwsFileStorage-1.0.0 $ mvn package $ export AWS_ACCESS_KEY=<enter_your_aws_access_key_here> $ export AWS_SECRET_ACCESS_KEY=<enter_your_aws_secret_access_key_here> $ export …
Docker build machine for Maven/Java – part 2
Slight improvement to the previous post about building using a Docker container. I’ve split it into two parts. The first part simply creates an image with OpenJDK 1.7, Maven 3.1.1, Git, tar, unzip and vim. The second part downloads the …