This week, we will take a look at Red Hat Container Development Kit (CDK). CDK provides a pre-built Container Development Environment based on Red Hat Enterprise Linux to help you develop container-based applications quickly. We will install CDK on a Windows machine and deploy our mykubernetesplanet from our last post to the Kubernetes cluster.
As written in the introduction, CDK will provide us an environment in order to develop container-based applications. I jumped upon it during my search for information about Minikube and I wanted to try it out and see what CDK has to offer in comparison to Minikube for example. CDK will create for you a VM running Red Hat Linux with Minishift. Minishift is a single-node OpenShift cluster (OpenShift is Red Hat's Kubernetes platform). By the way, Minishift is a fork of Minikube. Also, a local Docker registry is available. All information about CDK can be found at the of CDK.
Installation of CDK Complete installation instructions are available. Although these instructions seem to be complete, I had the impression that quite some of the instructions were duplicate or didn't need to be executed. I will, therefore, document the steps I had to take to install CDK on my Windows 10 machine and the problems I encountered.
First of all, installation needs to be done as an admin user, also the environment variables that need to be created, must be done as this same user. In order to download Red Hat components, you can download the Red Hat Development Suite. You will need a Red Hat Developer account for this which you can create for free and use the Red Hat products for development purposes (you will need a paid license when you want to use the Red Hat products in a production environment of course). With this Development Suite installer you can choose which Red Hat components you want to install. We will only check the following components:. Red Hat Container Development Kit.
Cygwin (which is automatically checked when CDK is checked) Beware that the installation will take up to 7GB of disk space. You will also need a virtualization platform installed. I have already Hyper-V installed and this is also the default CDK is using. Next, you will need to set the env variable HYPERVVIRTUALSWITCH to your external switch name of your Hyper-V settings (by means of the setx command). Beware to restart the console again, otherwise your env variable will have no value. If you don't have an external switch yet, you can do so via the Hyper-V Manager:. Right-click your machine and choose Virtual Switch Manager.
Create a New virtual network switch of type External. Finally, you need to choose your External Network Finally, you will have to add the Minishift executable to your user environment PATH variable. In your installation directory, you will have the Minishift executable and the Cygwin tools. In your user home directory, a.minishift directory is added which contains an ISO file and a oc executable (The oc command line tool which is used for interacting with OpenShift clusters). Start Minishift Now that we have installed CDK, we can start Minishift as follows. Make sure to start the command from your C-drive, otherwise the path to the ISO file will not be found: minishift start This gives us the following error: - Starting Minishift VM. FAIL E0519 13:57 520 start.go:368 Error starting the VM: Error starting stopped host: exit status 1.
With CDK Drive, you can manage multiple locations easily, compare and contrast location performance, and make educated decisions based on transaction data. Easy Configuration Every dealership works differently, so we made a DMS that adapts to yours. Release Notes for McAfee Agent 4.5 for Solaris 10 x86 Release Notes for McAfee Agent 4.5 for Solaris 10 x86 About this Document. DO NOT INSTALL THE SOFTWARE. ADP Software Install Agent, Free Download by SupportSoft. The service allows Firefox to install updates without UAC confirmation. Actions > Agent Software > Installing Windows Agents.
Error starting the VM: Error starting stopped host: exit status 1 I have not found out what the cause of this error was, but reading the installation instructions again, I executed the command: minishift setup-cdk Running the Minishift start command brings us a bit further, but we run against this error: Error to register VM: ssh command error: command: sudo -E subscription-manager register -auto-attach -username user -password 'password' err: exit status 70 output: Registering to: subscription.rhsm.redhat.com:443/subscription You must first accept Red Hat's Terms and conditions. Please visit. You may have to log out of and back into the Customer Portal in order to see the terms. Let's go to the in the error message, login with your Red Hat account and agree with the Terms and Conditions.
Stopping and starting Minishift still gives us an error: - Registering machine using subscription-manager Registration in progress. FAIL 20s Error to register VM: ssh command error: command: sudo -E subscription-manager register -auto-attach -username user -password 'password' err: exit status 1 output: Development units may only be used on hosted servers and with orgs that have active subscriptions. Registering to: subscription.rhsm.redhat.com:443/subscription The system has been registered with ID: Installed Product Current Status: Product Name: Red Hat Enterprise Linux Server Status: Not Subscribed Unable to find available subscriptions for all your installed products. Looking at the of my Red Hat account, I cannot find anything that is wrong. I read somewhere that this can be due to some latency when subscriptions are added and subscriptions are made available to the tools. After approximately an hour and a half I tried to start Minishift again, and then it suddenly worked. Finally, run the following command to start the OpenShift Web Console in your browser: minishift console With user developer and any password, you enter the OpenShift Web Console.
If you encounter problems with starting Minishift, you can enable extra logging and probably you will see the cause of the problem: minishift start -v=5 -show-libmachine-logs Important Notice Before You Continue Before you continue, we have to do some extra configuration. It is needed because several days after I installed Minishift, I could not start Minishift anymore due to the following error: Starting OpenShift using registry.access.redhat.com/openshift3/ose:v3.9.14. Starting OpenShift container.