Depending on the detected values of openshift_facts, or if the openshift_ip and openshift_public_ip values are overridden, it will be the computed value of openshift_ip. View the connection test logs: From the output of the previous command, identify the endpoint that you want to review the connectivity logs for. OpenShift Container Engine comes with the same security options and default settings as the OpenShift Container Platform. The OpenShift node exposes metrics that Prometheus collects and stores. yaml file is in the same directory as the installer. The canonical name of an instance is 'cluster'. Familiarity with Ansible is assumed, however you can use this configuration as a reference to create your own implementation using the configuration management tool of your API Server. $ oc cluster-info. Managed by HAProxy. . A selector to restrict the list of returned objects by their fields. You can add one or more alternative certificates that the API server will return based on the fully qualified domain name (FQDN) requested by the client, for example when a reverse proxy or load balancer is used. Port 1936 can still be inaccessible due to your iptables rules. company. This is a cache of https://docs. Otherwise, the registry and router pods cannot be placed anywhere. This abstraction is called the Red Hat OpenShift Container Platform. com/container-platform/3. Specify a RHOSP flavor with at least 16 GB RAM to use for control plane and compute nodes. Readapt the steps based on current needs. Procedure. You can run and manage container-based workloads by using Kubernetes. Specify the Floating IP address to use for external access to the OpenShift API. If the search does not return exactly one entry, deny access. The kubelet on master nodes automatically creates mirror pods on the API server for each of the control plane static pods so that they are visible in the cluster in the kube-system project. This guide provides step-by-step examples for interacting with the OpenShift and Kubernetes REST APIs. The OpenShift Container Platform master includes a built-in OAuth server. The fastest way for developers to build, host and scale applications in the public cloud The OpenShift Container Platform API service is an active/active service, so stopping the service does not affect the environment as long as the requests are sent to a separate master server. TCP endpoint of OpenShift API server, such as 127. By changing the root directory to /host, you can run binaries contained in the host’s executable paths: # chroot /host. 2. $ oc apply -f </path/to/file. Featured Products. These REST APIs can be used to manage end-user applications, the cluster, and the users of the cluster. The continue option should be set when retrieving more results from the server. object. labelSelector. The Operator makes this possible by deploying and managing one or more HAProxy-based Ingress Controllers to handle routing. B. From the Developer perspective in the OpenShift Container Platform web console, select Monitoring → Metrics. The route is also capable of providing load balancing traffic across healthy pods. The Ingress Operator implements the ingresscontroller API and is the component responsible for enabling external access to OpenShift Container Platform cluster services. The master is the host or hosts that contain the master components, which include the API server, controller manager server, and etcd. The authentication layer identifies the user associated with requests to the OpenShift Container Platform API. Get the Master URL of your cluster. For node hosts, use the oadm create-node-config command to write the configuration files. If true, partially initialized resources are included in the response. yaml file. Active-passive. Here are the steps taken: Generate a search filter by combining the attribute and filter in the configured url with the user-provided user name. Dec 21, 2022 · Fortunately, OpenShift makes working with Kubernetes a lot easier by providing a layer of abstraction that removes a good deal of Kubernetes's operational complexity from the day-to-day developer experience. However, the OpenShift Container Platform controllers service is an active/passive service, where the services use etcd to decide the active master. 834. Kubernetes is an open source container orchestration tool developed by Google. NAMESPACE. <base_domain>:6443. Kubernetes IP address, by default 172. Each action features a request breakdown that lists the requests types and expected results, followed by applicable example An OCP route exposes a service at a host name, such as www. These metrics are also used by horizontal pod autoscalers in order to determine when and how to scale. For non-cloud deployments, this will default to the IP address associated with the default route on the 1. The fastest way for developers to build, host and scale applications in the public cloud Oct 23, 2023 · By default OpenShift uses self-signed certificates for all of the routes created on *. Labels are used to organize, group, or select API objects Most objects can include labels in metadata Labels are simple key-value pairs that you choose Labels can never be changed Question 6 The OpenShift master host is the API endpoint and the orchestrator of the system. Because the kubelet configuration was managed dynamically as of OCPv4. 8 The openshift start command is used to launch OpenShift Enterprise servers. EndpointHints provides hints describing how an endpoint should be consumed. Chapter 1. includeUninitialized. Example output. The proxy configuration must be the same on each host in the cluster. Fully redundant deployment with load balancing. Ensure that the record references the load balancer. The fastest way for developers to build, host and scale applications in the public cloud The openshift start command is used to launch OpenShift Container Platform servers. This attribute cannot be negative. openshift-logging. You can check your current kubelet configuration using the following procedures instead of the configuration file on the node hosts like OCPv3. Manage users and groups: Add users and groups with different levels of permissions to use or modify clusters. These values must be different. otc-test. Verify that the new master host has been added to the etcd member list. Default security context constraints, pod security policies, best practice network and storage settings, service account configuration, SELinux integration, HAproxy edge routing configuration, and all other out of the box protections OpenShift Container Platform offers are To add an etcd host to an existing cluster: Ensure you have the latest playbooks by updating the openshift-ansible package: $ yum update openshift-ansible. A. Users obtain OAuth access tokens to authenticate themselves to the API. These are RESTful APIs accessible via HTTP (s) on the OpenShift Container Platform master servers. If you choose Custom DNS, after connecting to the cluster, you'll need to follow the OpenShift documentation to configure a custom certificate for your ingress controller and custom certificate for your API server. API Server. io/cluster. Feb 16, 2022 · Note: In the below example, usage of the "/odata/ProcessSchedules" REST API endpoint is explained. Recommended node host practices. OpenShift Container Platform includes functionality that uses cluster membership information to generate A/AAAA records. APIServer holds configuration (like serving certificates, client CA and CORS domains) shared by all API servers in the system, among them especially kube-apiserver and openshift-apiserver. These include overriding the default plug-ins, connecting to etcd, automatically creating service accounts, building image names, customizing project requests, configuring volume plug-ins, and much more. APIServer [config. To use the private cloud service endpoint, include the --server=<private_service_endpoint> option. Master Components; Component Description; API Server. Verify that the API server’s DNS record directs the kubelet on master nodes to https://api-int. Select the base domain to deploy the cluster to. For external access to this master, you need to have an ELB or other load balancer configured that would provide the external access needed, or you need to connect over a VPN connection to the internal name of the host. Pods. test04. The command and its subcommands (master to launch a master server and node to launch a node server) all take a limited set of arguments that are sufficient for launching servers in a development or experimental environment. For the internal OpenShift Container Platform Elasticsearch logstore, specify elasticsearch. svc:9200. com:8443 which works just fine. . clientCA. ENDPOINT. aroapp. com, so that external clients can reach it by name; each route consists of a host name, a route name, a service selector, and an optional security configurations. You must provide IP addresses and not host names because etcd access is controlled by IP address. $ oc env dc/router openshift_ca_data- openshift_cert_data- openshift_key_data- openshift_master- Obtain a certificate. If they are the same, the named certificates will fail. Type. The kubelet exposes metrics that can be collected and stored in back-ends by Heapster. The API server automatically provisions projects based on the template that is identified by the projectRequestTemplate parameter of the master-config. Set /host as the root directory within the debug shell. log. Must be the value set in the openshift_portal_net parameter in your inventory file. <cluster_name>. Red Hat のプライベート、オンプレミスクラウドアプリケーションのデプロイメントおよびホスティング The master and node configuration files determine the make-up of your OpenShift Container Platform cluster, and define a range of options. oc login -u apikey -p <API_key> [--server=<private_service_endpoint>] Log in by running Red Hat OpenShift API requests directly against your cluster: Log in to your cluster with the API such as via a curl request. Use the following to configure iptables to open port 1936: OpenShift Container Platform provides sticky sessions, which enables stateful application traffic by ensuring all traffic hits the same endpoint. The fastest way for developers to build, host and scale applications in the public cloud Have an OpenShift Container Platform cluster with at least one master and at least one node and a system outside the cluster that has network access to the cluster. Each section contains a description of the resource or function and a set of applicable actions. Active-active. Configuring masters and nodes. io. The most common Kubernetes use case is to deploy an array of interconnected microservices, building an application in a cloud native way. Environment health checks. Specify both the IP address of the healthy master where the signer server is running, and the etcd name of the new member. The fastest way for developers to build, host and scale applications in the public cloud The Ingress Operator implements the ingresscontroller API and is the component responsible for enabling external access to OpenShift Container Platform cluster services. Configuring OpenShift Container Platform to use these proxies can be as simple as setting standard environment variables in configuration or JSON files. If you followed the: Advanced installation method using Ansible, then make your configuration changes in the Ansible playbook. If you use an external Certificate Authority (CA) to sign your certificates, create a new certificate and provide it to OpenShift Container Platform by following your internal processes. The default API server certificate is issued by an internal OpenShift Container Platform cluster CA. However, the OpenShift Container Platform controllers service is an active/passive service, where the services leverage etcd to decide the active master. Use OpenShift Container Platform docs links for OpenShift Kubernetes Engine documentation. fieldSelector. Controller Manager Server. yaml>. Extension scripts allow you to override the default behavior of the web console and customize it for your needs. The following commands write the relevant launch configuration file (s), certificate files, and any other necessary files The Ingress Operator makes it possible for external clients to access your service by deploying and managing one or more HAProxy-based Ingress Controllers to handle routing. This command provides information about the OpenShift cluster, including the URL of the master API endpoint. Build, deploy and manage your applications across cloud- and on-premise infrastructure. Jun 18, 2019 · If I want to access the REST API of the openshift master server from anywhere in my company I use https://master. This API enables you to send container, infrastructure, and audit logs to specific endpoints within or outside your cluster. Master and node host names or their domain suffix. hints. The Kubernetes API server validates and configures the data for pods, services, and replication controllers. <random>. If experiencing issues, you can use the The openshift start command and its subcommands (master to launch a master server and node to launch a node server) take a limited set of arguments that are sufficient for launching servers in a development or experimental environment. Understanding networking. Ensure that the load balancer’s port 6443 definition references each master node. When both options are in use, the lower of the two values limits the number of pods on a node. OData (Open Data Protocol) is an ISO/IEC approved, OASIS standard that defines a set of best practices for building and consuming RESTful APIs. An administrator typically configures their router to be visible audit specifies the settings for audit configuration to be applied to all OpenShift-provided API servers in the cluster. Now I'm writing an admin application that is accessing the REST API and is deployed in this openshift cluster. All DNS records will be sub-domains of this base and will also include the cluster name. config. 0. OpenShift Container Platform produces logs for services that run on static pods in a cluster: These logs are intended more for debugging purposes than for security auditing. You can use the Ingress Operator to route traffic by specifying OpenShift Container Platform Route and Kubernetes Ingress resources. The operator makes this possible by deploying and managing one or more HAProxy-based Ingress Controllers to handle routing. The log forwarding endpoint, either the server name or FQDN. Red Hat OpenShift Dedicated The master host uses port 10250 to reach the nodes and does not go over SDN. Having the proxy and master on the same host is merely a convenience and may not be suitable for your environment. A master instance where metadata is disabled. It also assigns pods to nodes and synchronizes pod information with service configuration. The OpenShift Kubernetes Engine is the core of the OpenShift Container Platform. In the Developer perspective, you can only run one query at a Description. Access the healthy master and connect to the running etcd container. As an OpenShift Enterprise administrator, you can view a cluster’s metrics from all containers and components in one user interface. You can send different types of logs to various systems, so different individuals can access each type. A selector to restrict the list of returned objects by their labels. Balances load between API master endpoints. The route may further specify TLS options and a certificate, or specify a public CNAME that the router should also accept for HTTP and HTTPS traffic. Knowing the verification process for the various components is the first step to troubleshooting issues. However, if the endpoint pod terminates, whether through restart, scaling, or a change in configuration, this statefulness can disappear. clusters_mgmt v1 OAS3 https://api. Enter a name for your cluster. apps. string. hostname. example. Topology information can be found in the zone and nodeName fields instead. Manage authentication: Learn how user, group, and API authentication works in OpenShift Container For master host configuration files, use the openshift start command with the --write-config option to write the configuration files. When a person requests a new OAuth token, the OAuth server uses the configured identity provider to determine the identity of the person making the request. ci-ln-m0wpfjb-f76d1-vnb5x-master-0 audit-2021-03-09T00-12-19. HAProxy. The method you use to configure your master and node configuration files must match the method that was used to install your OpenShift Container Platform cluster. CPU and memory-based metrics are viewable from the Red Hat OpenShift Container Platform web console and are available for use by Horizontal Pod Autoscalers (HPAs) C. Because the master host is a schedulable OpenShift Container Platform node, follow the steps in the Deprecating a node host section. Can be run as a standalone process. The openshift start command is used to launch OpenShift Container Platform servers. The authorization layer then uses information about the requesting user to determine if the request is allowed. Red Hat OpenShift Dedicated. Check that unique master node host names have been provided by DHCP. clientCA references a ConfigMap containing a certificate bundle for the signers that will be recognized for incoming client certificates in addition to the operator managed signers. Mar 27, 2021 · 1. etcd Using this Guide. If you label a master host with the region=infra label and have no other dedicated infrastructure nodes, you must also explicitly mark the host as schedulable by adding openshift_schedulable=true to the entry. One instance is elected as a cluster leader at a time. For external access to this master, you need to have an ELB or other load balancer configured that would provide the external access needed, or you need to connect over a VPN connection to the internal name of the host. Search the directory using the generated filter. In order to make Orchestrator API Requests using HTTP Request activities, two options are present: Orchestrator HTTP Request Activity HTTP Request Activity 1. As an administrator, you can configure authentication for OpenShift Container Platform. A reference configuration implemented using Ansible playbooks is available as the advanced installation method for installing a OpenShift Container Platform cluster. Red Hat OpenShift Online. Choose a query from the Select Query list, or run a custom PromQL query by selecting Show PromQL. The master manages the Kubernetes cluster’s nodes and schedules pods to run on them. You can retrieve logs for each service with the master-logs api api, master-logs controllers controllers, or master-logs etcd etcd commands. The OpenShift Container Platform API service is an active/active service, so stopping the service does not affect the environment as long as the requests are sent to a separate master server. The OpenShift Container Platform node configuration file contains important options. It is a snapshot of the page at 2024-06-11T03:20: Not yet installed OpenShift Container Platform, then start the OpenShift Container Platform API server, specifying the hostname of the (future) OpenShift Container Platform master and a directory to store the configuration file created by the start command: Red Hat OpenShift Container Platform. Once the nodes are registered with the API, the cluster can disperse node information without using CoreDNS-mDNS. A route allows developers to expose services through an HTTP (S) aware load balancing and proxy layer via a public DNS entry. A master instance where the VPC subnet is not configured for Auto-assign Public IP. For example, if you were already running a router on the master, port 443 would not be available. This topic contains steps to verify the overall health of the OpenShift Container Platform cluster and the various components, as well as describing the intended behavior. This procedure assumes that the external system is on the same subnet as the cluster. The installation has been initiated within 24 hours of Ignition configuration file creation. Pods are the rough equivalent of OpenShift Container Platform v2 gears, with containers the rough equivalent of v2 cartridge instances. Namespace to use for namespaced objects. Specify the openshift_master_cluster_public_hostname and openshift_master_cluster_hostname paramaters in the Ansible inventory file, by default /etc/ansible/hosts. Select the project that you want to view metrics for in the Project: list. Without loss of generality, in these examples it is assumed that the API server is presented by HTTPS and that it may be accessed insecurely. Attempt to bind to the LDAP server using the DN of the entry retrieved from the search While this field can hold values, it is not writable through the v1 API, and any attempts to write to it will be silently ignored. 7: Optional name of the secret required by the endpoint for TLS communication. Please note the URL format may vary depending Table 1. Other internal host names or their domain suffix. Apply the new configuration file: Because you update the existing OAuth server, you must use the oc apply command to apply the change. Further information is here, Generating a file that contains the current configuration . Since this value is server defined, clients may only use the continue value from a previous query result with identical query parameters (except for the value of continue) and the server may reject a continue value it does not recognize. The Ignition files are created when the following command is run: $ . Start a debug pod for a node: $ oc debug node/my-node. To send logs to other log aggregators, you use the OpenShift Container Platform Log Forwarding API. OpenShift Container Platform internal DNS cannot be received over SDN. etcd. To view the object, enter the following command: $ oc get podnetworkconnectivitycheck <name> \ -n openshift-network-diagnostics -o yaml. <your-openshift-domain>:6443. Single-tenant, high-availability Kubernetes clusters in the public cloud. For example, extension scripts can be used to add your own company’s branding or to A master instance where the VPC subnet is not configured for Auto-assign Public IP. Prometheus Metrics is a metrics engine that stores data persistently. Defaults to everything. To view the audit logs: View the OpenShift API server logs: List the OpenShift API server logs that are available for each control plane node: $ oc adm node-logs --role= master --path= openshift-apiserver/. The install-config. 7/install_config/master_node_configuration. Manifests for these static pods are installed by default by the openshift-ansible installer, located in the /etc/origin/node/pods directory on the master host. Apr 3, 2023 · In OpenShift, you can determine the master API endpoint URL by using the oc cluster-info command. It depends on the target host of the deployment and uses the computed values of openshift_hostname and openshift_public_hostname. io/v1] Description. Remove the master host from the [masters] and [nodes] groups in the /etc/ansible/hosts Ansible inventory file to avoid issues if running any Ansible tasks using that inventory file. This resolves the node names to their IP addresses. 30. The Open Data Protocol (OData) enables the creation of REST-based data services, which allow resources 1. <location>. The debug pod mounts the host’s root file system in /host within the pod. Kubernetes master is running at https://api. If the parameter is not defined, the API server creates a default template that creates a project with the requested name, and assigns the requesting user to the "admin" role for that Ingress Operator in OpenShift Container Platform. Read more about OKE . 1:8443. Edit your /etc/ansible/hosts file, add new_<host_type> to the [OSEv3:children] group and add hosts under the new_<host_type> group: This example configures an authentication proxy on the same host as the master. Can be installed on separate hosts or collocated on master hosts. The Orchestrator API implementation is based on the OData protocol. Kubernetes ensures that Pods are able to network with each other, and allocates each Pod an IP address from an internal network. 1. For example, two parameters control the maximum number of pods that can be scheduled to a node: podsPerCore and maxPods. Etcd IP addresses. OpenShift Container Platform cluster This document provides instructions for configuring and managing your OpenShift Container Platform cluster network, including DNS, ingress, and the Pod network. openshift. etcd stores the persistent master state while other components watch etcd for changes to bring themselves into the desired state. OpenShift Container Platform leverages the Kubernetes concept of a pod, which is one or more containers deployed together on one host, and the smallest compute unit that can be defined, deployed, and managed. This eliminates the network traffic associated with Not yet installed OpenShift Container Platform, then start the OpenShift Container Platform API server, specifying the hostname of the (future) OpenShift Container Platform master and a directory to store the configuration file created by the start command: Kubernetes overview. Confirm that the changes are in effect: $ oc describe oauth. For example, developers can use the platform's OpenShift web console Red Hat OpenShift Container Platform. hostname of this endpoint. This can be done during an advanced installation or configured after installation. The master and node configuration files determine the make-up of your OpenShift Container Platform cluster, and define a range of options. The secret must exist in the openshift-logging project. Red Hat OpenShift Container Platform. com/api/clusters_mgmt/v1/openapi Mar 13, 2022 · Openshift Architecture Components Master Node & its components. html. /openshift-install create ignition-configs --dir= . You can check it using above reference 1 day ago · About OData and References. Administrators can customize the web console using extensions, which let you run scripts and load custom stylesheets when the web console loads. The OpenShift Container Platform distribution of Kubernetes includes the Kubernetes v1 REST API and the OpenShift v1 REST API. See how OpenShift Container Platform control plane and worker nodes are managed and updated through the Machine API and Operators. /install_dir. lz gm qm iy tl kt ui fn wx ph