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Yudhi Widyatama
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Installing APCu Extension in Openshift Origin PHP Build Image
Background Openshift Origin is an open-source software developed by Red Hat, that aims to make operating Kubernetes cluster simpler. In Openshift, a base build docker image is used and merged with application source codes to create deployment docker images....
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Ruby Blues in Openshift Origin v2 (or How I broke my app by installing new relic gem)
The day I tried to install a Ruby gem for New Relic RPM, it causes almost a day  downtime for Phusion Passenger-run Rails Application. It turns out that there are several thing that worth noting about Ruby dependency management. The First Error The error me...
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Running as Pods as Anyuid in Openshift Origin
When using Openshift Origin, by default all pods are running with 'restricted' context, where they are forced to use a generated user id. Some Containers just doesn't work that way, so we need to relax the restriction a bit. Reference :  https://blog.opensh...
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Cleaning Openshift Origin Images Registry
When using and tending an Openshift Origin cluster (for example, Origin version 3.7), it is normal to start the storage allocation in small sizes. However soon we find that storage for registry get filled up quickly with images from each build process. This...
Cleaning Openshift Origin Images Registry
Cleaning Openshift Origin Images Registry
inventorsparadox.blogspot.com
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Lessons Upgrading MySQL DB 5.1 to Percona 5.7
I just recently upgraded a database server that were previously running MySQL 5.1 (standard, Sun/Oracle version) into Percona Server 5.7. A few quirks notable enough to warrant this blog post. Planning and Preparation A Percona blog post ( mysql-upgrade-bes...
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Securing Openshift Origin Nodes
Background We have deployed Openshift Origin based cluster based on  Origin Milestone 4 release. When security assessment performed on several of the applications in the cluster, some issues crop up and needs further remediation. Some issue related to appli...
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How to create LVM volume with thin provisioning
This post shows how to create LVM volume with thin provisioning, that is, only actually used ranges of the volume will actually be allocated. Check volume groups First, check lvm volume groups to find out which vg has space for our thin volume pool. vgdispl...
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How to Run X Windows Server inside Docker Container
Background Sometimes I need to run X Windows-based applications inside Docker containers, and running the server locally is too unpractical because of latency reasons or the working laptop has no X Windows Server. First I tried to create a VirtualBox-based ...
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Docker Basic 101
Background This post would describe notes that results from my initial exploration using docker. Docker could be described as a thin VM. Essentially docker runs processes in a linux host in a semi-isolated environment. It was a brilliant technical accomplis...
Docker Basic 101
Docker Basic 101
inventorsparadox.blogspot.co.id
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Running X11 Apps inside Docker on Remote Server
Background Docker is fast-growing trend that I could no longer ignore, so I tried Docker running in a Linux server machine. Running server app is a breeze inside docker, but I need to run Pentaho Data Integration in the server, which uses X11 display. There...
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