List Rundeck Projects

The other day I found out that Rundeck has an API which allows it to be controlled remotely by scripts. I’ve decided to write a script to list all the projects defined in a rundeck instance. Prerequisites Before you start, you need: The instance’s URL (server and port) An api key for the user Make […]

Fix 418 Unused Error on Dreamhost

TL;DR: Have a look at the error log and then to the violated rule. Suddenly, I started to get 418 errors on one of my sites. I’d just get 418 from the source and as they say: that was that. Normally, I don’t even notice such errors, but this one broke a bunch of pages. […]

How to Develop Pipelines – Some Best Practices

These days I’m developing a bunch of pipelines to automatise the build/deployment process. Here are some things I’ve learned: How to develop Initially, I’ve started developing the pipeline as any other program: Create a repository, fire my editor, write a Jenkinsfile and use the Pipeline script from SCM. While the result is exactly what you […]

Sending HTTP requests with Jenkins Pipelines

As part of the CI/CD process, we might need to communicate with some external services’ APIs (e.g. notifying elastic search of a new index alias). I found an easy way to do it: Using a jenkins plugin. Jenkins plugin Jenkins has a HTTP request plugin. If you install it (or have it installed), you have […]

An Initial CI/CD Pipeline

Release-based deployments are sort of nice in the sense that you plan, draw a line, prepare stuff and release one or more components at the same time. It however stalls feature deployments a lot (e.g. a nice feature can be implemented in say a day but the release is sheduled in a month). It also […]

Copy Files From B to C via A with SSH

The other day I had an interesting situation to solve: I have some data on machine B and I want it copied on machine C. However, machines B and C have no direct connection (known_hosts), but machine A can connect to B and C without password. It is obvious that one needs to use machine […]

Run Restricted Groovy API in Jenkins

The more recent versions of Jenkins have improved on security. Unfortunately, a side-effect is that scripts which were running before would fail now. An example is:

… which would list the projects defined in Jenkins. Fortunately, you can have access to theis API via the In-process Script Approval plugin (which is installed by default). […]

Fix Missing In-process Script Approval in Jenkins

Normally, when you have a script or a method to be approved, you should see the In-process Script Approval entry in your Jenkins’ configuration: Unfortunately, the In-process Script Approval entry in Jenkins’ configuration is not always shown, even though we have items to be approved. I found that installing the Permissive Script Security and briefly […]

Fix Jenkins Ignored Plugin “Check Now”

TL;DR: Check if a browser extension is blocking your request when you click Check Now While playing more with jenkins, I’ve encountered an error while requesting Check Now for plugin updates: it seemed that my request got ignored. I’ve tried different URLs (with and without HTTPS, stable or not) with the same result: my request […]

Update Jenkins on Ubuntu

I’ve got an installation of Jenkins on a Ubuntu 14.04.5 LTS which I needed to update. In order to do so I did the following: Download the new version (2.107 at the moment of writing this post). In /home/user/backup/ execute:

Backup the old version (Jenkins war is installed in /usr/share/jenkins):

Overwrite the old […]

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