OpenShift Cloud Computing：高级安装

Question

I want to install OpenShift using the advanced installation - method on Centos7 (EC2). But first I need to know some issues:

URL of tutorial: https://docs.openshift.com/enterprise/3.0/admin_guide/install/advanced_install.html#installing-ansible

First I need to configure the prerequisitions on the master and its 2 nodes ( https://docs.openshift.org/latest/install_config/install/prerequisites.html ). When that's done the advanced installation will start.

1) Do I have to install ansible on the master only and running the installer at the end or do I need to install anything on the node (except docker)?

2) Which steps do I have to follow here: https://github.com/openshift/openshift-ansible or just download the repo and following the tutorial.

3) Is there something necessary what needs to be installed or configured which is not cited?

Answer 1

You are correct to start with the prerequisite steps outlined in the origin documentation .

In particular,

• Ensure that you've completed host preparation steps . These steps include packages that must be installed on every system.
• Ensure that you've configured host access . The ansible installer uses ssh key authentication by default so you must be able to login to each system (including the master) from the master with ssh key authentication.
• Ensure that the output of hostname -f outputs the correct hostname of each system.

Once you've finished with the prerequisite steps, you will move on to the advanced installation section . Steps for installing ansible and creating an ansible host inventory can be found here. You only need to install ansible on the master. Once you've installed ansible and created a host inventory you can run the ansible playbook to begin the installation.

Afterwards, you can verify the installation and then complete follow up items such as configuring authentication , creating a router and creating a docker registry .

If you encounter any problems with the advanced installer, create an issue with the openshift-ansible project.