A Technical I.T./DevOps Blog
Question
What is Amazon VPC?
Answer
VPC stands for Virtual Private Cloud. For a typical VM in AWS, there are restrictions on IP address assignments. VPC allows you to configure servers and network access points without restrictions. It allows you to leverage AWS with your own network in a separate data center. It is ideal for hybrid clouds or situations where you need full control of networking without the constraints of typical AWS deployments.
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With U.S. dollars you can buy over 30 different cryptocurrencies directly! You no longer need to first buy Bitcoin then transfer it to another exchange as an intermediate step. Just change the drop down menu for “PAY WITH” to USD, and you can proceed to invest in alternative cryptocurrencies (or buy Bitcoin itself) directly! Changelly is user-friendly, and a great way to buy altcoins with Euros or U.S. Dollars.
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If you want to receive free cryptocurrency by just learning more,
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Continue reading “Interested in Buying Cryptocurrency besides Bitcoin (aka Altcoins)?”
The perceived usefulness of application servers seems unquestioned in many corners of the I.T. world. The conditions that facilitate the deployment of application servers in architectural planning persist. However some people think that code can be written to function on a server that interacts with a web and/or database server without a typical application server being deployed in the middle of the customized code and the OS itself. Some professionals do not think that application servers are necessary.
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Continue reading “Will the Market for Application Servers Grow?”
Problem scenario
You are trying to create a virtual router in OpenShift. When you run the command “oc adm router goodname” you get this error:
“error: router could not be created; could not retrieve list of security constraints to verify service account “router”: securitycontextconstraints.security.openshift.io is forbidden: User “jdoe” cannot list securitycontextconstraints.security.openshift.io at the cluster scope: User “jdoe” cannot list all securitycontextconstraints.security.openshift.io in the cluster”
What should you do?
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Question
What are the differences between Kubernetes and OpenShift?
Answer
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Continue reading “What Are the Differences between Kubernetes and OpenShift?”
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Continue reading “Advertisement: Get Passed Applicant Tracking System Screening Mechanisms”
Problem scenario
You installed OpenShift. You want to determine which version you are using. What do you do?
Solution
Run this command: oc version
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Continue reading “How Do You Find the Version of OpenShift That You Are Using?”
Problem scenario
OpenShift has projects unlike Kubernetes. You are using OpenShift. You are not sure which project you are working in. How do you find out its name?
Solution
Run this command: oc project
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Continue reading “How Do You Find What Project in OpenShift You Are Working In?”
Martin Luther King Jr. was a Nobel Peace Prize winner who died before the age of 40. He was not quite 5’7″ but made a massive impact on U.S. history. It is unlikely Barack Obama would have been elected President in 2008 had Martin Luther King Jr. not advanced the cause of civil rights for African Americans. King’s influence and inspiration will be felt for decades to come. On January 15, 2018 we observe Martin Luther King Jr.
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Problem scenario
You want to use OpenShift as opposed to Kubernetes. How do you deploy OpenShift to try it out?
Solution
1. Install Docker on Linux. We recommend you use a RedHat OS. The hardware requirements are not that high if you are just testing it for development and/or learning purposes. For directions on how to install Docker on a RedHat distribution of Linux, see this posting if it is in AWS.
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Continue reading “How Do Install and Configure OpenShift to Test It Out?”