![]() ![]() Management is performed remotely from the OpenShift Container Platform cluster. For example, RHCOS software is in RPM packages, and each RHCOS system starts up with a RHEL kernel and a set of services that are managed by the systemd init system.Īlthough it contains RHEL components, RHCOS is designed to be managed more tightly than a default RHEL installation. The same quality, security, and control measures that support RHEL also support RHCOS. The underlying operating system consists primarily of RHEL components. The following list describes key features of the RHCOS operating system: If you install your cluster on infrastructure that you manage, you must follow the installation documentation to obtain the RHCOS images, generate Ignition config files, and use the Ignition config files to provision your machines. If you install your cluster on infrastructure that the cluster provisions, RHCOS images are downloaded to the target platform during installation, and suitable Ignition config files, which control the RHCOS configuration, are used to deploy the machines. While RHCOS is the default operating system for all cluster machines, you can create compute machines, which are also known as worker machines, that use RHEL as their operating system. RHCOS is the only supported operating system for OpenShift Container Platform control plane, or master, machines. RHCOS is supported only as a component of OpenShift Container Platform 4.1 for all OpenShift Container Platform machines. Created by the same development teams that created Red Hat Enterprise Linux Atomic Host and CoreOS Container Linux, RHCOS combines the quality standards of Red Hat Enterprise Linux (RHEL) with the automated, remote upgrade features from Container Linux. Red Hat Enterprise Linux CoreOS (RHCOS) represents the next generation of single-purpose container operating system technology. Changing Ignition Configs after installation Configuring RHCOS in OpenShift Container Platformĥ.2. ![]() Red Hat Enterprise Linux CoreOS (RHCOS)"ĥ.1.2. Red Hat Enterprise Linux CoreOS (RHCOS)"Ĭollapse section "5. Red Hat Enterprise Linux CoreOS (RHCOS)Įxpand section "5. Creating a Kubernetes Manifest for OpenShift Container Platform"Ĥ.3.1. Creating a Kubernetes Manifest for OpenShift Container Platform"Ĭollapse section "4.3. Creating a Kubernetes Manifest for OpenShift Container PlatformĮxpand section "4.3. Building a simple container"Ĭollapse section "4.2. About developing containerized applicationsĮxpand section "4.2. Understanding OpenShift Container Platform development"Ĥ.1. Understanding OpenShift Container Platform development"Ĭollapse section "4. Understanding OpenShift Container Platform developmentĮxpand section "4. Understanding the Machine Config OperatorĤ. About the OpenShift Container Platform update serviceģ.1.2.4. Platform Operators in OpenShift Container Platformģ.1.2.3. Operators in OpenShift Container Platform"ģ.1.2.1. Operators in OpenShift Container Platform"Ĭollapse section "3.1.2. Operators in OpenShift Container PlatformĮxpand section "3.1.2. Machine roles in OpenShift Container Platform"ģ.1.2. Machine roles in OpenShift Container Platform"Ĭollapse section "3.1.1. Machine roles in OpenShift Container PlatformĮxpand section "3.1.1. Understanding the OpenShift Container Platform control plane"ģ.1.1. Understanding the OpenShift Container Platform control plane"Ĭollapse section "3.1. Understanding the OpenShift Container Platform control planeĮxpand section "3.1. The OpenShift Container Platform control plane"ģ.1. The OpenShift Container Platform control plane"Ĭollapse section "3. The OpenShift Container Platform control planeĮxpand section "3. About the OpenShift Container Platform update serviceģ. OpenShift Container Platform installation overview"Ģ.2. OpenShift Container Platform installation overview"Ĭollapse section "2.1. OpenShift Container Platform installation overviewĮxpand section "2.1. Installation and update"Ĭollapse section "2. Internet and Telemetry access for OpenShift Container PlatformĮxpand section "2. OpenShift Container Platform 3 and 4ġ.1.4. ![]() OpenShift Container Platform lifecycleġ.1.3.5. Simplified installation and update processġ.1.3.4. OpenShift Container Platform overview"ġ.1.3.2. OpenShift Container Platform overview"Ĭollapse section "1.1.3. OpenShift Container Platform overviewĮxpand section "1.1.3. The benefits of containerized applications"ġ.1.3. The benefits of containerized applications"Ĭollapse section "1.1.2. The benefits of containerized applicationsĮxpand section "1.1.2. Introduction to OpenShift Container Platform"ġ.1.2. Introduction to OpenShift Container Platform"Ĭollapse section "1.1. Introduction to OpenShift Container PlatformĮxpand section "1.1. OpenShift Container Platform architecture"ġ.1. OpenShift Container Platform architecture"Ĭollapse section "1. OpenShift Container Platform architectureĮxpand section "1. ![]()
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