Getting started with the CLI
- About the CLI. With the OpenShift Container Platform command-line interface (CLI), you can create applications and...
- Installing the CLI. You can install the OpenShift CLI ( oc) in order to interact with OpenShift Container Platform from...
- Logging in to the CLI. You can log in to the oc CLI to access and manage your cluster. You must have...
Full Answer
How to create a new user in OpenShift?
Please follow these steps:
- Click Administration on the left menu
- Select Cluster Settings
- Select the Global configuration tab
- Scroll down to select OAuth
- Select the HTPASSWD option
- Select the file
How to create a project with OpenShift Origin?
How to Install and Configure OpenShift Origin PaaS Server on Ubuntu 20.04
- Prerequisites. A server running Ubuntu 20.04. ...
- Install Docker CE. ...
- Download OpenShift Origin. ...
- Start OpenShif Origin Cluster. ...
- Create Project on OpenShift. ...
- Access the OpenShift Web Console. ...
- Deploy Application on OpenShift Origin. ...
- Verify External Access. ...
- Conclusion. ...
What is OpenShift and why automation matters?
What is OpenShift and why automation matters. Dynatrace news What is OpenShift? Red Hat OpenShift is a hybrid cloud platform. It offers automated installation, upgrades, and lifecycle management throughout the container stack – the operating... Read Article. 11 months ago.
How to learn Shopify tutorial for beginners?
how to learn shopify development tutorials for beginners The basics will walk you through the set-up, configuration, publication, and management of your first online store via Shopify. A little-known fact is that more than 600,000 business in 175 countries run shop via Shopify.
How do I start an OpenShift server?
Step by Step Guide to OpenShift SetupStep 1 − First install Linux on both the machines, where the Linux 7 should be the least version. ... Step 2 − Configure Docker so that it should allow insecure communication on the local network only. ... Step 3 − Generate keys on the master machine and then copy the id_rsa.More items...
How do I log into OpenShift command line?
To log in using the CLI, collect your token from the web console's Command Line page, which is accessed from Command Line Tools in the Help menu.
How do I access OpenShift app?
The first step in allowing access to a service is to define an external IP address range in the master configuration file: Log in to OpenShift Container Platform as a user with the cluster admin role. $ oc login Authentication required (openshift) Username: admin Password: Login successful.
How do you bring up the OpenShift cluster?
Upgradation of Node Components Step 1 − Remove all atomic OpenShift packages from all the nodes where you wish to perform the upgrade. Step 2 − Next, disable node scheduling before upgrade. Step 3 − Replicate all the node from the current host to the other host. Step 4 − Upgrade Docker setup on host.
How do I run OC on Windows?
You can install the OpenShift CLI ( oc ) binary on Winndows by using the following procedure.From the web console, click ?.Click Command Line Tools.Select the oc binary for Windows platform, and then click Download oc for Windows for x86_64.Save the file.Unzip the archive with a ZIP program.More items...
What is OpenShift tutorial?
OpenShift is a cloud development Platform as a Service (PaaS) developed by Red Hat. It is an open source development platform, which enables the developers to develop and deploy their applications on cloud infrastructure. It is very helpful in developing cloud-enabled services.
How do I call OpenShift service?
How to call a Kubernetes Service on OpenShiftScenario 1 - K8s Client to K8s Service. ... Scenario 2 - K8s Client to K8s Service via the Apiman Gateway. ... Scenario 3 - External Client to K8s. ... Scanario 4 - External Client to K8s Service via the Apiman Gateway.
What is OpenShift server URL?
Console URL: The OpenShift Dedicated URL for the web console. https://console.
How do you find IP address in OpenShift?
The IP information displays in the Virtual Machine Overview screen for the virtual machine.In the OpenShift Virtualization console, click Workloads → Virtualization from the side menu.Click the Virtual Machines tab.Select a virtual machine name to open the Virtual Machine Overview screen.
How do I restart OpenShift Master API?
Modify each OpenShift Container Platform masterRestart the master API service: On every master: # master-restart api # master-restart controllers. The number of etcd nodes must be odd, so you must add at least two hosts.Restart the flanneld service: # systemctl restart flanneld.service.
What is an OpenShift operator?
Red Hat® OpenShift® Operators automate the creation, configuration, and management of instances of Kubernetes-native applications. Operators provide automation at every level of the stack—from managing the parts that make up the platform all the way to applications that are provided as a managed service.
How do I deploy single node OpenShift?
On the administration node, open a browser and navigate to Install OpenShift with the Assisted Installer. Click Create Cluster to create a new cluster. In the Cluster name field, enter a name for the cluster. Select Install single node OpenShift (SNO).
How to install OpenShift Container Platform?
To install OpenShift Container Platform, you will need: 1 At least two physical or virtual RHEL 7+ machines, with fully qualified domain names (either real world or within a network) and password-less SSH access to each other. This guide uses master.openshift.example.com and node.openshift.example.com. These machines must be able to ping each other using these domain names. 2 A valid Red Hat subscription. 3 Wildcard DNS resolution that resolves your domain to the IP of the node. So, an entry like the following in your DNS server:
What to do before running installer on master?
Before running the installer on the master, set up password-less SSH access as this is required by the installer to gain access to the machines. On the master, run the following command.
Can you create roles in OpenShift?
By default, when installed for the first time, there are no roles or user accounts created in OpenShift Container Platform, so you need to create them. You have the option to either create new roles or define a policy that allows anyone to log in (to start you off).
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Contact our sales team for expert help configuring a Red Hat OpenShift product to suit your needs.
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Work with a Red Hat partner for help addressing a particular challenge or if you need industry-specific expertise.
What is Red Hat OpenShift 4?
Red Hat OpenShift 4 provides new tools that can enhance application architectures beyond basic microservices. With Service Mesh (Istio) and Serverless (Knative), OpenShift enables new architectural strategies in a codified and supported package.
What is ODO in OpenShift?
A CLI tool for developers who are writing, building, and deploying applications on OpenShift. With odo, developers get an opinionated CLI tool that supports fast, iterative development which abstracts away Kubernetes and OpenShift concepts, thus allowing them to focus on what's most important to them: code.
How to install OpenShift CLI?
You can install the OpenShift CLI ( oc) binary on Linux by using the following procedure. Navigate to the Infrastructure Provider page on the Red Hat OpenShift Cluster Manager site. Select your infrastructure provider, and, if applicable, your installation type.
Can I install OC on Linux?
If you installed an earlier version of oc, you cannot use it to complete all of the commands in OpenShift Container Platform 4.2. Download and install the new version of oc.
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What is OpenShift?
OpenShift - Overview. OpenShift is a cloud development Platform as a Service (PaaS) hosted by Red Hat. It’s an open source cloud-based user-friendly platform used to create, test, and run applications, and finally deploy them on cloud.
What is OpenShift application?
OpenShift is a cloud-enabled application Platform as a Service (PaaS). It’s an open source technology which helps organizations move their traditional application infrastructure and platform from physical, virtual mediums to the cloud. OpenShift supports a very large variety of applications, which can be easily developed ...
What is OpenShift extensible?
One of the key features of OpenShift is it is extensible, which helps the users support the application written in other languages. OpenShift comes with various concepts of virtualization as its abstraction layer. The underlying concept behind OpenShift is based on virtualization.
How did OpenShift come into existence?
OpenShift came into existence from its base named OpenShift V2, which was mainly based on the concept of year and cartridges, where each component has its specifications starting from machine creation till application deployment, right from building to deploying the application.
Does OpenShift need Red Hat?
System Requirement. In order to set up enterprise OpenShift, one needs to have an active Red Hat account. As OpenShift works on Kubernetes master and node architecture, we need to set up both of them on separate machines, wherein one machine acts as a master and other works on the node.
Is OpenShift a private platform?
In other words, OpenShift brings Docker and Kubernetes together to the enterprise level.
Can you use OpenShift on any cloud?
This gives the end user a true sense of multi-cloud offering, where they can use OpenShift on any cloud which satisfies their needs. This is one of the newest offering of Red Hat where the end user can use OpenShift to build test deploy and run their application on OpenShift which is hosted on cloud.
Know your state
The first thing I like to do is to ensure that I know what state my cluster is in before I carry out this type of activity. I want to know what namespaces I have ( oc projects ), what state pods are in ( oc get pods --all-namespaces ) and what state my nodes are in ( oc get nodes --show-labels ).
Plan for failure
Next, cut a backup of your cluster. You are probably doing this on a regular basis but if you're not you should take a look at tooling like https://velero.io/ which helps you to regularly snapshot your cluster state and persistent storage and ship it to one of a number of storage targets such as S3.
Stop your applications
Now that we know what our cluster looks like and we know that we can restore in the event of any issues, we can stop our application workload. Ensuring that application workload is stopped in a controlled manner helps us to avoid data loss.
Stop your cluster
Tip: Block storage volumes which have been dynamically provisioned through a cloud provider like AWS EBS or VMWare vSphere will remain attached to any nodes where pods were running with persistent storage unless that workload is stopped.
Start your master nodes
Once they have booted we can check that they are healthy using oc get nodes – all nodes should be in a ready state before continuing on to your infra nodes.
Start your infra nodes
Once your infra nodes have booted you can ensure that infra nodes are showing in a ready state, and that oc get pods –all-namespaces shows the logging, metrics, router and registry pods have started and are healthy.
Start your worker nodes
Once your worker nodes have booted you can ensure that all nodes are showing in a ready state with oc get nodes. Refer to the health check documentation for a more in-depth set of checks.
