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93 lines
2.3 KiB
Plaintext
93 lines
2.3 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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// * machine_management/more-rhel-compute.adoc
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// * post_installation_configuration/node-tasks.adoc
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[id="rhel-preparing-node_{context}"]
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= Preparing a RHEL compute node
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Before you add a Red Hat Enterprise Linux (RHEL) machine to your {product-title} cluster, you must register each host with Red Hat Subscription Manager (RHSM), attach an active {product-title} subscription, and enable the required repositories.
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. On each host, register with RHSM:
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+
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[source,terminal]
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----
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# subscription-manager register --username=<user_name> --password=<password>
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----
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. Pull the latest subscription data from RHSM:
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+
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[source,terminal]
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----
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# subscription-manager refresh
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----
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. List the available subscriptions:
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+
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[source,terminal]
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----
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# subscription-manager list --available --matches '*OpenShift*'
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----
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. In the output for the previous command, find the pool ID for an {product-title} subscription and attach it:
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[source,terminal]
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----
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# subscription-manager attach --pool=<pool_id>
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----
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. Disable all yum repositories:
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.. Disable all the enabled RHSM repositories:
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[source,terminal]
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----
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# subscription-manager repos --disable="*"
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----
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.. List the remaining yum repositories and note their names under `repo id`, if any:
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+
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[source,terminal]
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----
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# yum repolist
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----
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.. Use `yum-config-manager` to disable the remaining yum repositories:
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[source,terminal]
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----
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# yum-config-manager --disable <repo_id>
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----
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Alternatively, disable all repositories:
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[source,terminal]
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----
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# yum-config-manager --disable \*
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----
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Note that this might take a few minutes if you have a large number of available repositories
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. Enable only the repositories required by {product-title} {product-version}:
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[source,terminal,subs="attributes+"]
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----
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# subscription-manager repos \
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--enable="rhel-8-for-x86_64-baseos-rpms" \
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--enable="rhel-8-for-x86_64-appstream-rpms" \
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--enable="rhocp-{product-version}-for-rhel-8-x86_64-rpms" \
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--enable="fast-datapath-for-rhel-8-x86_64-rpms"
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----
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. Stop and disable firewalld on the host:
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[source,terminal]
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----
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# systemctl disable --now firewalld.service
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----
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[NOTE]
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====
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You must not enable firewalld later. If you do, you cannot access {product-title} logs on the worker.
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====
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