This document shows how to deploy an OpenShift instance on a server using CodeReady Containers (crc) that can be accessed remotely from one or more client machines (sometimes called a "headless" instance). This provides a low-cost test and development platform that can be shared by developers. Deploying this way also allows a user to create an instance that uses more cpu and memory resources than may be available on his or her laptop.
While there are benefits to this type of deployment, please note that the primary use case for crc is to deploy a local OpenShift instance on a workstation or laptop and access it directly from the same machine. The headless setup is configured completely outside of crc itself, and supporting a headless setup is beyond the mission of the crc development team. Please do not ask for changes to crc to support this type of deployment, it will only cost the team time as they politely decline :)
This repository contains incident reports for all [my company] products and services.
How to document an incident?
Copy the template.md file to a new file named YYYY-mm-dd-title-of-incident.md, eg. 2021-09-08-database-outage.md. Make sure the date is correct for UTC rather than your local time zone, for California staff this might mean the incident happened "tomorrow". Then fill in all the fields in the template and create a Pull Request. The [my team] team will review and merge it.
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The Arduino Yún's ability to connect to the Internet introduces many new possibilities to traditional Arduino development, such as capturing data from the web and making use of it inside of a sketch.
This project will demonstrate this ability by monitoring the number of upvotes accrued by a Reddit comment thread and alerting the user when new upvotes are added.
Many companies offer application programming interfaces (APIs, for short) that allow third-party programs to access their data. Reddit, for example, provides an API that gives detailed information and statistics for posts, comment threads, and users.
This project uses a Python script on the Yun's Linux side to read the current upvote count from a comment thread using Reddit's API. A skech running on the Arduino side will track this number and display a notification message on an LED matrix every time a new vote is added.
I assume that you have a running debian wheezy host with libvirt and qemu/kvm
installed. You need two guest VMs for this. The first guest will get the IP
192.168.100.2 and the second will get 192.168.100.100. All following commands
must be run with sudo or under root.
Internal Network
We create a new network named internal with libvirt and use it with the IP
Creating Let's Encrypt certificates for IBM free Kubernetes clusters
The IBM Kubernetes service free clusters consist of a single worker node with 2 CPU and 4 GB of memory for experimenting with Kubernetes. Unlike the fee-based service, these clusters do not include capabilities for application load balancing using ingress out-of-the-box. However, if you manage a DNS domain (any provider will suffice) and can add an A record, it's possible for you to configure your own ingress that can provide http and https session termination for your containerized applications. Getting a TLS-enabled website or simply an external REST API couldn't be easier!
Prerequisites
Free IBM Kubernetes Cluster (IKS) - upgrade your account from Lite plan to create one. In the example commands, we'll assume that this cluster is named mycluster
kubectl - match your cluster API version (as of 5/17/20 - this is ~1.16.9)
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