| commit | author | age | ||
| ac2fc6 | 1 | #+begin_src ditaa :file ocp4-stack.png :cmdline -E -s 0.8 |
| OB | 2 | |
| 3 | OpenShift 4 Technology Stack | |
| 4 | ||
| 5 | +-------------+------------+----------+------------------------------+ | |
| 6 | User | Web Console | CLI | REST API | Source Code Management (SCM) | | |
| 7 | Interfaces | | oc/kubectl | | git | | |
| 8 | +--------------------+-----+----------+------------------------------+ | |
| 9 | Development | Templates (xPaaS) | Language Support | | |
| 10 | Deployment | Ready Applications | Runtimes (S2I) | | |
| 11 | +------------+------++-----------------------------------------------+ | |
| 12 | | | | OpenShift | | |
| 13 | Orchestration | Kubernetes | etcd | Extensions | | |
| 14 | | | | (Operators) | | |
| 15 | +------------+------+------------------------------------------------+ | |
| 16 | Runtime | CRI-O | | |
| 17 | | Container Runtime Interface - OCI | | |
| 18 | | OCI == Open Container Initiative | | |
| 19 | +----------------------+-------------------+-------------------------+ | |
| 20 | OS | Red Hat CoreOS | on Workers: RHEL7 | on Workers: Windows 10 | | |
| 21 | +----------------------+-------------------+-------------------------+ | |
| 22 | #+end_src | |
| 23 | ||
| 24 | IPI = Installer Provided Infrastructure = Full Stack Automation | |
| 25 | UPI = User Provided Infrastructure | |
| 26 | ||
| 27 | Infrastructure: | |
| 28 | - Virtual Machines or Bare Metal | |
| 29 | - Control Plane (master nodes) | |
| 30 | - Amount: 3 | |
| 31 | - Worker Plane (worker nodes) | |
| 32 | - redundancy, so at least 2 | |
| 33 | - in 4.5+: you can omit workers by creating an "edge cluster" | |
| 34 | - (optional) Infrastructure Plane (infra nodes) | |
| 35 | - redundancy, so at least 2 | |
| 36 | - Software Defined Network (SDN) | |
| 37 | - Pod Network, Cluster Network | |
| 38 | - Services Network | |
| 39 | - Machine Network | |
| 40 | - LoadBalancers | |
| 41 | - API Loadbalancer (Port 6443) | |
| 42 | - Application Loadbalancer (Port 80/443) | |
| 43 | - Persistent Storage | |
| 44 | - Filesystem Storage | |
| 45 | - NFS | |
| 46 | - Blockdevice Storage | |
| 47 | - iSCSI, FibreChannel, Ceph, EBS | |
| 48 | - Object Storage | |
| 49 | - S3 | |
| 50 | ||
| 51 | #+begin_src ditaa :file ocp4-installer.png :cmdline -E -s 0.8 | |
| 52 | ||
| 53 | Openshift Installer ---+ +---------+ +----------> ignition files | |
| 54 | | | | | | |
| 55 | install-config.yaml Manifests | |
| 56 | ||
| 57 | ||
| 58 | ||
| 59 | OpenShift Installer -> BootStrap Node -----------------+ | |
| 60 | [ etcd operator | MCS ] | | |
| 61 | ^ ^ ^ v | |
| 62 | ignition config --+ | +---- RHCOS images +----------------+ | |
| 63 | | | control plane n|+ | |
| 64 | container registry | RHCOS / etcd ||+ | |
| 65 | +----------------+|| | |
| 66 | +----------------+| | |
| 67 | +----------------+ | |
| 68 | #+end_src | |
