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55 lines
1.7 KiB
Plaintext
55 lines
1.7 KiB
Plaintext
// Module included in the following assemblies:
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//
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// * machine_management/adding-rhel-compute.adoc
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[id="rhel-adding-node_{context}"]
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= Adding a RHEL compute machine to your cluster
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You can add compute machines that use Red Hat Enterprise Linux as the operating
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system to an {product-title} {product-version} cluster.
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.Prerequisites
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* You installed the required packages and performed the necessary configuration
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on the machine that you run the playbook on.
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* You prepared the RHEL hosts for installation.
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.Procedure
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Perform the following steps on the machine that you prepared to run the
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playbook:
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. Create an Ansible inventory file that is named `/<path>/inventory/hosts` that
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defines your compute machine hosts and required variables:
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+
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----
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[all:vars]
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ansible_user=root <1>
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#ansible_become=True <2>
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openshift_kubeconfig_path="~/.kube/config" <3>
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[new_workers] <4>
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mycluster-worker-0.example.com
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mycluster-worker-1.example.com
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----
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<1> Specify the user name that runs the Ansible tasks on the remote compute
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machines.
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<2> If you do not specify `root` for the `ansible_user`, you must set `ansible_become`
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to `True` and assign the user sudo permissions.
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<3> Specify the path to the `kubeconfig` file for your cluster.
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<4> List each RHEL machine to add to your cluster. You must provide the
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fully-qualified domain name for each host. This name is the host name that the
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cluster uses to access the machine, so set the correct public or private name
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to access the machine.
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. Run the playbook:
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+
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----
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$ cd /usr/share/ansible/openshift-ansible
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$ ansible-playbook -i /<path>/inventory/hosts playbooks/scaleup.yml <1>
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----
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<1> For `<path>`, specify the path to the Ansible inventory file
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that you created.
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