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Configure OpenShift Container Platform

Overview

This guide introduces you to the basic concepts of OpenShift Container Platform, and helps you configure a basic application. This guide provides the configuration steps following the installation of a basic OpenShift Container Platform environment, and is not suitable for deploying or installing a production environment of OpenShift.

Change Log In Identity Provider

The default behavior of a freshly installed OpenShift Container Platform instance is to deny any user from logging in. To change the authentication method to HTPasswd:

  1. Open the /etc/origin/master/master-config.yaml file in edit mode.

  2. Find the identityProviders section.

  3. Change DenyAllPasswordIdentityProvider to HTPasswdPasswordIdentityProvider provider.

  4. Change the value of the name label to htpasswd_auth and add a new line file: /etc/origin/master/htpasswd in the provider section.

    An example identityProviders section with HTPasswdPasswordIdentityProvider would look like the following.

    oauthConfig:
  ...
  identityProviders:
  - challenge: true
    login: true
    name: htpasswd_auth provider
    provider:
      apiVersion: v1
      kind: HTPasswdPasswordIdentityProvider
      file: /etc/origin/master/htpasswd

  5. Save the file.

Create User Accounts

Now that you are using the HTPasswdPasswordIdentityProvider provider, you need to generate these user accounts.

  1. You can use the httpd-tools package to obtain the htpasswd binary that can generate these accounts.

    # yum -y install httpd-tools

  2. Create a user account.

    # touch /etc/origin/master/htpasswd
    # htpasswd -b /etc/origin/master/htpasswd admin redhat

    You have created a user, admin, with the password, redhat.

  3. Restart OpenShift before going forward.

    # master-restart api
    # master-restart controllers

  4. Give this user account cluster-admin privileges, which allows it to do everything.

    $ oc adm policy add-cluster-role-to-user cluster-admin admin

    When running oc adm commands, you should run them only from the first master listed in the Ansible host inventory file, by default /etc/ansible/hosts.

  5. You can use this username/password combination to log in via the web console or the command line. To test this, run the following command.

    $ oc login -u admin

Before going forward, change to the default project.

$ oc project default

For more details, see roles and authentication.

Deploy the OpenShift Router

The OpenShift router is the entry point for external network traffic destined for OpenShift services. It supports HTTP, HTTPS, and any TLS-enabled traffic that uses SNI, which enables the router to send traffic to the correct service.

Without the router, OpenShift services and pods are unable to communicate with any resource outside of the OpenShift instance.

The installer creates a default router.

  1. Delete the default router using the following command.

    $ oc delete all -l router=router

  2. Create a new default router.

    $ oc adm router --replicas=1 --service-account=router

The OpenShift documentation contains detailed information on Router Overview.

Deploy an Internal Registry

Openshift provides an internal, integrated container image registry that can be deployed to locally manage images. OpenShift uses the docker-registry to store, retrieve, and build container images, as well as deploy and manage them throughout their lifecycle.

The installer creates a default registry.