| New file |
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| | | #+begin_src ditaa :file ocp4-stack.png :cmdline -E -s 0.8 |
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| | | |
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| | | OpenShift 4 Technology Stack |
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| | | |
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| | | +-------------+------------+----------+------------------------------+ |
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| | | User | Web Console | CLI | REST API | Source Code Management (SCM) | |
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| | | Interfaces | | oc/kubectl | | git | |
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| | | +--------------------+-----+----------+------------------------------+ |
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| | | Development | Templates (xPaaS) | Language Support | |
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| | | Deployment | Ready Applications | Runtimes (S2I) | |
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| | | +------------+------++-----------------------------------------------+ |
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| | | | | | OpenShift | |
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| | | Orchestration | Kubernetes | etcd | Extensions | |
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| | | | | | (Operators) | |
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| | | +------------+------+------------------------------------------------+ |
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| | | Runtime | CRI-O | |
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| | | | Container Runtime Interface - OCI | |
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| | | | OCI == Open Container Initiative | |
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| | | +----------------------+-------------------+-------------------------+ |
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| | | OS | Red Hat CoreOS | on Workers: RHEL7 | on Workers: Windows 10 | |
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| | | +----------------------+-------------------+-------------------------+ |
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| | | #+end_src |
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| | | |
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| | | IPI = Installer Provided Infrastructure = Full Stack Automation |
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| | | UPI = User Provided Infrastructure |
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| | | |
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| | | Infrastructure: |
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| | | - Virtual Machines or Bare Metal |
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| | | - Control Plane (master nodes) |
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| | | - Amount: 3 |
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| | | - Worker Plane (worker nodes) |
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| | | - redundancy, so at least 2 |
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| | | - in 4.5+: you can omit workers by creating an "edge cluster" |
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| | | - (optional) Infrastructure Plane (infra nodes) |
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| | | - redundancy, so at least 2 |
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| | | - Software Defined Network (SDN) |
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| | | - Pod Network, Cluster Network |
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| | | - Services Network |
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| | | - Machine Network |
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| | | - LoadBalancers |
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| | | - API Loadbalancer (Port 6443) |
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| | | - Application Loadbalancer (Port 80/443) |
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| | | - Persistent Storage |
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| | | - Filesystem Storage |
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| | | - NFS |
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| | | - Blockdevice Storage |
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| | | - iSCSI, FibreChannel, Ceph, EBS |
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| | | - Object Storage |
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| | | - S3 |
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| | | |
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| | | #+begin_src ditaa :file ocp4-installer.png :cmdline -E -s 0.8 |
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| | | |
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| | | Openshift Installer ---+ +---------+ +----------> ignition files |
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| | | | | | | |
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| | | install-config.yaml Manifests |
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| | | |
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| | | |
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| | | |
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| | | OpenShift Installer -> BootStrap Node -----------------+ |
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| | | [ etcd operator | MCS ] | |
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| | | ^ ^ ^ v |
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| | | ignition config --+ | +---- RHCOS images +----------------+ |
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| | | | | control plane n|+ |
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| | | container registry | RHCOS / etcd ||+ |
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| | | +----------------+|| |
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| | | +----------------+| |
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| | | +----------------+ |
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| | | #+end_src |
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