This is the first post in a series that shows how to use the new release of the community version of Red Hat Ansible Tower. In this post, we will start with the installation of AWX on top of OpenShift. In the next post, I’ll show how to set a dynamic inventory to access the servers from AWS (EC2) and how to run a playbook to access our AWS EC2 inventory.
Continue reading “Guide to starting use AWX on top of OpenShift, the upstream of Red Hat Ansible Tower”
In an environment where OpenStack instances are automatically subscribed to Satellite, it is important that Satellite is notified of terminated instances so that is can safely delete its host record. Not doing so will:
- Exhaust the available subscriptions, leading to unsubscribed hosts not being able to apply updates and security errata.
- In the event that an emergency security errata needs to be deployed across the organization, Satellite administrators would be unable to determine if a host was either off or terminated, leading to uncertainty with their security posture.
In smaller environments, where one team is responsible for both OSP and Satellite, it’s possible to have one system administrator do this by using their administrator level access across both systems to determine which host records can be safely deleted in Satellite when the corresponding instance no longer exists.
Continue reading “Using Falcon to cleanup Satellite host records that belong to terminated OSP instances”
According to Wikipedia, entropy is the randomness collected by an operating system or application for use in cryptography or other uses that require random data.
Entropy is often overlooked, misconfigured or forgotten and it can originate in sporadic errors whether it can be timeouts, refused connections, etc. Such errors are difficult to debug as the errors happen only when there is not enough entropy available.
This article tries to explain briefly how to check if this can be a problem in a RHEL system and how to fix it.
NOTE: This article is meant to provide some helpful hints about entropy. It is not meant to be exhaustive or definitive. There are hundreds of information sources on the Internet such as KCS articles; https://access.redhat.com/articles/221583 and https://access.redhat.com/solutions/19866 where this article is based. Check the bibliography section for more information.
Continue reading “Entropy in RHEL based cloud instances”
New Relic is an application-monitoring platform that provides in-depth analytics and analysis for applications regardless of the type of environment where they are deployed, or as New Relic put it themselves:
“Gain end-to-end visibility across your customer experience, application performance, and dynamic infrastructure with the New Relic Digital Intelligence Platform.” – New Relic
Continue reading “Using New Relic in Red Hat Mobile Node.js Applications”
Are you attending RHTE (Red Hat Tech Exchange) APAC, interested in IoT and like to tinker with real hardware? Come join us for an evening of fun at CodeStarter IoT hackathon on Thursday, Sep 7th.
Continue reading Snag an IoT kit at CodeStarter at RHTE APAC
Today I want to introduce you to some features of OpenShift 3.6 while giving you the chance to have a hands-on experience with the Release Candidate.
First of all:
- It’s a Release Candidate and the features I’ll show you are marked as Tech Preview, so use them for testing purpose ONLY!
- We cannot use Minishift just because there is no Minishift updated yet. Anyway, I’ll show how could use its base iso-image.
- I don’t want to use ‘oc cluster up’ in a virtual machine just because setting up a virtual machine, to run it, would be a waste of time.
Continue reading “OpenShift 3.6 – Release Candidate (A Hands-On)”
Hey, developers! Do you care about using the best practices to apply your application to the cloud? If so then you should be using The 12-factor App, which is a methodology for building software-as-a-service. Today I like to talk about the 12-factor App, which I had presented to a group at the Red Hat Summit last month.
Continue reading “12 Factors to Cloud Success”