11. sh script is backward compatible to accept this single file. crt certFile: master. 3. A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more. Then the etcd cluster Operator handles scaling to the remaining master hosts. etcd-openshift-control-plane-0 5/5 Running 11 3h56m 192. podsPerCore sets the number of pods the node can run based on the number of processor cores on the node. In OpenShift Container Platform 3. You must back up etcd data before shutting down a cluster; etcd is the key-value store for OpenShift Container Platform, which persists the state of all resource objects. This procedure assumes that you gracefully shut down the cluster. When you restore your cluster, you must use an etcd backup that was taken from the same z-stream release. Restoring the etcd configuration file. Following an OpenShift Container Platform upgrade , it may be desirable in extreme cases to downgrade your cluster to a previous version. For example, two parameters control the maximum number of pods that can be scheduled to a node: podsPerCore and maxPods. OCP Disaster Recovery Part 1 - How to create Automated ETCD Backup in OpenShift 4. You must back up etcd data before shutting down a cluster; etcd is the key-value store for OpenShift Container Platform, which persists the state of all resource objects. Backup and restore. etcd는 kubernetes에서 사용되는 모든 정보들이 저장되어 있는 key/value 기반의 database 이다. x very cleverly took the manual instructions from the backing up etcd documentation and automated them with a CronJob. Back up your cluster’s etcd data regularly and store in a secure location ideally outside the OpenShift Container Platform environment. tar. When you restore etcd, OpenShift Container Platform starts launching the previous pods on nodes and reattaching the same storage. You have taken an etcd backup. Test Environments. In the AWS console, stop the control plane machine instance. When restoring, the etcd-snapshot-restore. However, this file is required to restore a previous state of etcd from the respective etcd snapshot. If you have lost all master nodes, the following steps cannot. daily) for each cluster to enable cluster recovery if necessary. View the member list: Copy. 59 and later. Do not take an etcd backup before the first certificate rotation completes, which occurs 24 hours after installation, otherwise the backup will contain expired certificates. SSH access to a master host. He has authored over 300 tech tutorials, providing. such as NetworkManager features, as well as the latest hardware support and driver updates. Restoring a single-node OpenShift Container Platform cluster using an etcd backup is not officially supported. You must back up etcd data before shutting down a cluster; etcd is the key-value store for OpenShift Container Platform, which persists the state of all resource objects. Back up etcd data. yaml and deploy it. When both options are in use, the lower of the two values limits the number of pods on a node. This is a big. Get training, subscriptions, certifications, and more for partners to build, sell, and support customer solutions. OpenShift OAuth server: Users request tokens from the OpenShift OAuth server to authenticate themselves to the API. ec2. 4. Follow these steps to back up etcd data by creating an etcd snapshot and backing up the resources for the static pods. 6. io/v1]. Read developer tutorials and download Red Hat software for cloud application development. Delete all containers: # docker rm. Note that you must use an etcd backup that was taken from the same z-stream release, and then you can restore the OpenShift cluster from the backup. 3. openshift. 3 security update), and where to find the updated files, follow the link below. Before you begin You need to have a Kubernetes. Get training, subscriptions, certifications, and more for partners to build, sell, and support customer solutions. If etcd encryption is enabled during a backup, the static_kuberesources_<datetimestamp>. fbond "systemctl status atomic-openshift-node -l". Control plane backup and restore. 11, the scaleup. 6. g. 2. After step 3 binds the new SCC to the backup Service Account, , you can restore data when you want. The OpenShift Container Platform node configuration file contains important options. Chapter 3. To verify the name resolution: $ dig +short docker-registry. For security reasons, store this file separately from the etcd snapshot. It is important to take an etcd backup before performing this procedure so that your cluster can be restored if you encounter any issues. xRestarting the cluster gracefully. ec2. io/v1]. Read developer tutorials and download Red Hat software for cloud application development. As we continue to grow, we would wish to reach and impact more people who visit and take advantage of the guides we have on our blog. Instead, you either take a snapshot from a live member with the etcdctl snapshot save command or copy the member/snap/db file from an etcd data directory. Etcd [operator. Instead, you either take a snapshot from a live member with the etcdctl snapshot save command or copy the member/snap/db file from an etcd data directory. Back up your cluster’s etcd data regularly and store in a secure location ideally outside the OpenShift Container Platform environment. The Machine Config Operator (MCO) is responsible for mounting a secondary disk for an OpenShift Container Platform 4. 6 clusters. 2. If the cluster did not start properly, you might need to restore your cluster using an etcd backup. See Using RBAC to define and apply permissions. $ oc get pods -n openshift-etcd | grep etcd etcd-ip-10-0-143-125. By default, Red Hat OpenShift certificates are valid for one year. Restoring OpenShift Container Platform from an etcd snapshot does not bring back the volume on the storage provider, and does. 1. List the secrets for the unhealthy etcd member that was removed. OpenShift 3. An etcd backup plays a crucial role in disaster recovery. If etcd encryption is enabled during a backup, the static_kuberesources_<datetimestamp>. This snapshot can be saved and used at a later time if you need to restore etcd. (1) 1. Create an etcd backup on each master. Any pods backed by a replication controller will be recreated. In OpenShift Container Platform 4. You must back up etcd data before shutting down a cluster; etcd is the key-value store for OpenShift Container Platform, which persists the state of all resource objects. Let’s first get the status of the etcd pods. 1, then it is a single file that contains the etcd snapshot and static Kubernetes API server resources. For example, it can help protect the loss of sensitive data if an etcd backup is exposed to the incorrect parties. io/v1]. 6. gz. This backup can be saved and used at a later time if you need to restore etcd. 3. Installing the OADP Operator 4. An etcd backup plays a crucial role in disaster recovery. 2. When both options are in use, the lower of the two values limits the number of pods on a node. However, this file is required to restore a previous state of etcd from the respective etcd snapshot. These limits cap the maximum number of pods supported in a cluster to 250×60 = 15,000. This solution. 7. Prepare NFS server in Jumphost/bastion host for backup. This document describes the process to restart your cluster after a graceful shutdown. tar. 5 due to dependencies on cluster state. Do not take an etcd backup before the first certificate rotation completes, which occurs 24 hours after installation, otherwise the backup will contain expired certificates. internal. To navigate the OpenShift Container Platform 4. internal 2/2 Running 0 9h etcd-ip-10-0-154-194. For example, it can help protect the loss of sensitive data if an etcd backup is exposed to the incorrect parties. An etcd backup plays a crucial role in disaster recovery. openshift. Single-tenant, high-availability Kubernetes clusters in the public cloud. 4, the master connected to the etcd cluster using the host name of the etcd endpoints. Restoring. It’s required just once on one. There is also some preliminary support for per-project backup. tar. Red Hat OpenShift Dedicated. Instead, you either take a snapshot from a live member with the etcdctl snapshot save command or copy the member/snap/db file from an etcd data directory. yaml Then adjust the storage configuration to your needs in backup-storage. Get training, subscriptions, certifications, and more for partners to build, sell, and support customer solutions. Single-tenant, high-availability Kubernetes clusters in the public cloud. Red Hat OpenShift Container Platform. It is recommended to back up this directory to an off-cluster location before removing the contents. Learn about our open source products, services, and company. Monitor health of application routes, and the endpoints behind them. Follow these steps to back up etcd data by creating a snapshot. 4. The etcd package is required, even if using embedded etcd,. In OpenShift Container Platform, you can back up (saving state to separate storage) and restore (recreating state from separate storage) at the cluster level. The fastest way for developers to build, host and scale applications in the public cloud. etcd-ca. This backup can be saved and used at a later time if you need to restore etcd. kubeletConfig: podsPerCore: 10. You use the etcd backup to restore a single master host. In OpenShift Container Platform 3. 0 or 4. (1) 1. 2. 1. In this article, an Azure Red Hat OpenShift 4 cluster application was backed up. 2 cluster must use an etcd backup that was taken. 5. Even though master-0 is already unavailable, it is nice to have a backup just in case any additional problems arise (i. Etcd [operator. 我们都知道 etcd 是 OpenShift/Kubernetes 集群里最为重要的一个组件，用于存储集群所有资源对象的状态。. However, this file is required to restore a previous state of etcd from the respective etcd snapshot. ETCD performance troubleshooting guide for OpenShift Container Platform . Back up your cluster’s etcd data regularly and store in a secure location ideally outside the OpenShift Container Platform environment. If you run etcd as static pods on your master nodes, you stop the. Copied! $ oc rsh -n openshift-etcd etcd-ip-10-0-154-204. etcd is the key-value store for OpenShift Container Platform, which persists the state of all resource objects. you can use an existing nfs location also Hosts: - 100. Note that the etcd backup still has all the references to the storage volumes. All etcd hosts should contain the master host name if the etcd cluster is co-located with master services, or all etcd instances should be visible if etcd is running separately. Select the task that interests you from the contents of this Welcome page. Backing up etcd data. Red Hat OpenShift Dedicated. For security reasons, store this file separately from the etcd snapshot. 7. 10. operator. It is important to take an etcd backup before performing this procedure so that your cluster can be restored if you encounter any issues. Node failure due to hardware. sh script is backward compatible to accept this single file. 1, then this procedure generates a single file that contains the etcd snapshot and static Kubernetes API server resources. Trevor King 2021-08-25 03:05:41 UTC. Select the stopped instance, and click Actions → Instance Settings → Change instance type. ec2. gz file contains the encryption keys for the etcd snapshot. Provision as. Microsoft and Red Hat responsibilities. If you lose etcd quorum, you must back up etcd, take down your etcd cluster, and form a new one. In OpenShift Container Platform, you can also replace an unhealthy etcd member. In a terminal that has access to the cluster as a cluster-admin user, run the following command: $ oc rsh -n openshift-etcd etcd-ip-10-0-154-204. OADP features. ec2. Here are three examples of backup options: A backup of etcd (e. Power on any cluster dependencies, such as external storage or an LDAP server. Use the following steps to move etcd to a different device: Procedure. Build, deploy and manage your applications across cloud- and on-premise infrastructure. If you would prefer to watch or listen, head on. Stopping the ETCD. Cloudcasa. gz file contains the encryption keys for the etcd snapshot. Application networking. In OpenShift Container Platform, you can also replace an unhealthy etcd member. September 25, 2023 14:38. For example, it can help protect the loss of sensitive data if an etcd backup is exposed to the incorrect parties. Red Hat OpenShift Online. Step 1: Create a data snapshot. Backing up etcd data. You must back up etcd data before shutting down a cluster; etcd is the key-value store for OpenShift Container Platform, which persists the state of all resource objects. If the answer matches the output of the following, SkyDNS service is working correctly:Ensure etcd backup operation is performed after any OpenShift Cluster upgrade. He has extensive hands-on experience with public cloud platforms, cloud hosting, Kubernetes and OpenShift deployments in production. Backing up etcd. OpenShift Container Platform 4. As long as you have taken an etcd backup, you can follow this procedure to restore your cluster to a previous state. 1. The fastest way for developers to build, host and scale applications in the public cloud. 2. In OpenShift Container Platform, you can restore your cluster and its components by recreating cluster elements, including nodes and applications, from separate storage. 3. Chapter 1. Setting podsPerCore to 0 disables this limit. Read developer tutorials and download Red Hat software for cloud application development. This component is. 10. 28. Note that the etcd backup still has all the references to the storage volumes. io/v1]. Add. Back up your cluster’s etcd data regularly and store in a secure location ideally outside the OpenShift Container Platform environment. Single-tenant, high-availability Kubernetes clusters in the public cloud. This service uses TCP and UDP port 8053. etcd-client. Creating an environment-wide backup. x; Subscriber exclusive content. Restoring OpenShift Container Platform from an etcd snapshot does not bring back the volume on the storage provider, and does not produce a running. Back up your cluster’s etcd data regularly and store in a secure location ideally outside the OpenShift Container Platform environment. You have access to the cluster as a user. 3. 2. Vulnerability scanning. To schedule OpenShift Container 4 etcd backups with a cronjob. You can use one healthy etcd node to form a new cluster, but you must remove all other healthy nodes. Start with Architecture and Security and compliance . Have access to the cluster as a user with admin privileges. Log in to the container image registry by using your access token: $ oc login -u kubeadmin -p <password_from_install_log> $ podman login -u kubeadmin -p $ (oc whoami -t) image. $ oc get secrets -n openshift-etcd | grep ip-10-0-131-183. Support for RHEL7 workers is removed in OpenShift Container Platform 4. When you restore etcd, OpenShift Container Platform starts launching the previous pods on nodes and reattaching the same storage. 2. Do not take an etcd backup before the first certificate rotation completes, which occurs Backing up etcd data. etcd-openshift-control-plane-0 5/5. Access a master host. View the member list: Copy. 3. Restoring OpenShift Container Platform from an etcd snapshot does not bring back the volume on the storage provider, and does not produce a. internal. When you restore from an etcd backup, the status of the workloads in OpenShift Container Platform is also restored. Skip podman and umount, because only needed to extract etcd client from image. When you restore your cluster, you must use an etcd backup that was taken from the same z-stream release. Back up your cluster’s etcd data regularly and store in a secure location ideally outside the OpenShift Container Platform environment. key urls. 9 openshift-control-plane-0 <none> <none> etcd-openshift-control-plane-1 5/5 Running 0 3h54m 192. Build, deploy and manage your applications across cloud- and on-premise infrastructure. Restoring etcd quorum. For security reasons, store this file separately from the etcd snapshot. oc get pods -n openshift-etcd|grep etcd|grep -v quorum. You can remove this backup after a successful restore. 2. Etcd is the key-value store for OpenShift Container Platform, which persists the state of all resource objects. openshift. 9 openshift-control-plane-0 <none> <none> etcd-openshift-control-plane-1 5/5 Running 0 3h54m 192. This snapshot can be saved and used at a later time if you need to restore etcd. The etcd backup and restore tools are also provided by the platform. 12 cluster, you can set some of its core components to be private. Backing up etcd data. There is also some preliminary support for per-project backup . You do not need a snapshot from each master host in the cluster. It is important to take an etcd backup before performing this procedure so that your cluster can be restored if you encounter any issues. Prerequisites. View the member list: Copy. Ensure that you back up the /etc/etcd/ directory, as noted in the etcd backup instructions. gz file contains the encryption keys for the etcd snapshot. Back up your cluster’s etcd data regularly and store in a secure location ideally outside the OpenShift Container Platform environment. Follow these steps to back up etcd data by creating a snapshot. Subscriber exclusive content. Restoring. This includes upgrading from previous minor versions, such as release 3. In OpenShift Container Platform, you can also replace an unhealthy etcd member. Red Hat OpenShift Online. However, it is good practice to perform the etcd backup in case your upgrade fails. However, if the etcd snapshot is old, the status might be invalid or outdated. BACKING UP ETCD DATA Follow these steps to back up etcd data by creating a. Restore an Azure Red Hat OpenShift 4 Application. Once the cluster has upgraded to 3. This snapshot can be saved and used at a later time if you need to restore etcd. 100. The encryption process starts. Run the cluster-backup. OpenShift Container Platform 4. The fastest way for developers to build, host and scale applications in the public cloud. List the etcd pods in this project. For security reasons, store this file separately from the etcd snapshot. ec2. 6. 7, the use of the etcd3 v3 data model is required. Remove the old secrets for the unhealthy etcd member that was removed. However, this file is required to restore a previous state of etcd from the respective etcd snapshot. You do not need a snapshot from each master host in the cluster. 168. Do not take an etcd backup before the first certificate rotation completes, which occurs 24 hours after installation, otherwise the backup will contain expired certificates. io/v1]. For example: Backup every 30 minutes and keep the last 3 backups. Only save a backup from a single control plane host. It is important to take an etcd backup before performing this procedure so that your cluster can be restored if you encounter any issues when restarting the cluster. leading to etcd quorum loss and the cluster going offline. You must back up etcd data before shutting down a cluster; etcd is the key-value store for OpenShift Container Platform, which persists the state of all resource objects. Now that I’m bringing the cluster back up, I noticed all the certificates have expired. However, this file is required to restore a previous state of etcd from the respective etcd snapshot. 4. You have access to the cluster as a user with the cluster-admin role. In OpenShift Container Platform, you can perform a graceful shutdown of a cluster so that you can easily restart the cluster later. This process is no different than the process of when you remove a node from the cluster and add a new one back in its place. The cluster refuses to start on account of the certs expiring. As long as you have taken an etcd backup, you can follow this procedure to restore your cluster to a previous state. Replacing an unhealthy etcd member. Follow these steps to back up etcd data by creating an etcd snapshot and backing up the resources for the static pods. Add the new etcd host to the list of the etcd servers OpenShift Container Platform uses to store the data, and remove any failed etcd hosts: etcdClientInfo: ca: master. 1. tar. You must back up etcd data before shutting down a cluster; etcd is the key-value store for OpenShift Container Platform, which persists the state of all resource objects. In Kubernetes the etcd is one of the key components. 3. However, this file is required to restore a previous state of etcd from the respective etcd snapshot. If you run etcd as static pods on your master nodes, you stop the. Get product support and knowledge from the open source experts. List the secrets for the unhealthy etcd member that was removed. Red Hat OpenShift Dedicated. Red Hat OpenShift Dedicated. 9 openshift-control-plane-0 <none> <none> etcd-openshift-control-plane-1 5/5 Running 0 3h54m 192. 2. oc project openshift-etcd. etcd-openshift-control-plane-0 5/5 Running 11 3h56m 192. In OpenShift Container Platform, you can also replace an unhealthy etcd member. View the member list: Copy. If you are taking an etcd backup on OpenShift Container Platform 4. 2. gz file contains the encryption keys for the etcd snapshot. openshift. 6 due to dependencies on cluster state. internal. 2. However, this file is required to restore a previous state of etcd from the respective etcd snapshot. Pass in the name of the unhealthy etcd member that you took note of earlier in this procedure. In OpenShift Container Platform, you can perform a graceful shutdown of a cluster so that you can easily restart the cluster later. I am confused about the etcd backup / restore documentation of OpenShift 3. This document describes the process to recover from a complete loss of a master host. Do not take an etcd backup before the first certificate rotation completes, which occurs Backing up etcd data. IMHO the best solution is to define a Cronjob in the same project as the db, the Job will use an official OpenShift base image with the OC CLI, and from there execute a script that will connect to the pod where the db runs ( oc rsh. English. For example, an OpenShift Container Platform 4. In OpenShift Container Platform, you can also replace an unhealthy etcd member. DNSRecord [ingress. operator. As part of the process to back up etcd for a hosted cluster, you take a snapshot of etcd. 10. io/v1alpha1] ImagePruner [imageregistry. Back up your cluster’s etcd data regularly and store in a secure location ideally outside the OpenShift Container Platform environment. An etcd backup plays a crucial role in. This is really no different than the process of when you remove a node from the cluster and add a new one back in its place. In OpenShift Container Platform, you can also replace an unhealthy etcd member. gz file contains the encryption keys for the etcd snapshot. For security reasons, store this file separately from the etcd snapshot. 2. Specify both the IP address of the healthy master where the signer server is running, and the etcd name of the new member. Red Hat OpenShift Online. ec2. It is important that etcd is regularly backed up to ensure your cluster can be rapidly restored in the event of an incident. 11, the scaleup. Use case 3: Create an etcd backup on Red Hat OpenShift. 168. If etcd encryption is enabled during a backup, the static_kuberesources_<datetimestamp>. 7. You might need to temporarily shut down your cluster for maintenance reasons, or to save on resource costs. Get training, subscriptions, certifications, and more for partners to build, sell, and support customer solutions. Read developer tutorials and download Red Hat software for cloud application development. The API exposes two user-facing resources: HostedCluster and NodePool. NOTE: After any update in the OpenShift cluster, it is highly recommended to perform a backup of ETCD. 10. gz file contains the encryption keys for the etcd snapshot. If etcd encryption is enabled during a backup, the static_kuberesources_<datetimestamp>. Connect to the running etcd container, passing in the name of a pod that is not on the affected node: In a terminal that has access to the cluster as a cluster-admin user, run the following command: Copy. kubectl exec -it contrail-etcd-xxx -c contrail-etcd -n contrail-system sh. Verify that the new master host has been added to the etcd member list.