How do I restore a cluster?

How do I restore a cluster?

If your Kubernetes cluster is broken, you can restore the cluster from a snapshot….Prerequisite: To restore snapshots from S3, the cluster needs to be configured to take recurring snapshots on S3.

1. In the Global view, navigate to the cluster that you want to restore from a snapshots.
2. Click the ⋮ > Restore Snapshot.

What is cluster configuration database?

The Cluster Configuration Database (CCD) is a highly available, replicated database that is used to store internal configuration data for Sun Cluster configuration needs. The CCD database is divided into an Initial (Init) and a Dynamic database.

How do I start a Sun cluster?

Become superuser on a cluster node. Create a user account to access the cluster through Sun Cluster Manager….This network is required to use the Sun Cluster Manager GUI.

1. Determine whether the Java Web Console service is restricted.
2. Restore external access to the Java Web Console service.

How do you restore a rancher?

1. Preparation. It is advised that you run the restore from your local host or a jump box/bastion where your cluster yaml, rke statefile, and kubeconfig are stored.
2. Place Snapshot. As of RKE v0.
3. Configure RKE. Use your original rancher-cluster.
4. Restore the Database and bring up the Cluster.

Where is a cluster’s configuration information stored?

Cluster configuration data files

• The GPFS cluster configuration data is stored in the /var/mmfs/gen/mmsdrfs file.
• When running GPFS administration commands, it is necessary for the GPFS cluster configuration data to be accessible to the node running the command.

How do I configure cluster computing?

To create the compute cluster, open the COMPUTE screen, click Configure and do the following in the Configure compute cluster window: In the Nodes section, select nodes to add to the compute cluster, make sure the network state of each selected node is Configured, and click Next.

Does SQL clustering improve performance?

While SQL Server clustering provides high availability and minimizes system downtime, SQL Server clustering will not improve the performance of the servers or applications. To improve performance, you need to upgrade the computing power of the servers.

What should you do before restoring an RKE snapshot?

Before you run this command, you must:

1. Run rke remove to remove your Kubernetes cluster and clean the nodes.
2. Download your etcd snapshot from S3, if applicable. Place the etcd snapshot and the pki. bundle. tar. gz file in /opt/rke/etcd-snapshots . Manually sync the snapshot across all etcd nodes.

How do I restore ETCD?

To restore etcd on a static pod:

1. If the pod is running, stop the etcd pod by moving the pod manifest YAML file to another directory:
2. Move all old data:
3. Set required permissions and selinux context on the data directory:
4. Restart the etcd pod by moving the pod manifest YAML file to the required directory:

How do I recover the cluster configuration?

The cluster configuration database is recovered from the backup store on one node (the node that we just ran our recovery from). To ensure that this is the copy of the cluster configuration that the cluster uses, this node must be started first. Wbadmin is kind enough to do this for us, but we need to start the other nodes in the cluster.

How does failover clustering work?

Failover clustering uses the Volume Shadow Copy Service (VSS) for backing up and restoring the failover cluster configuration. While a node is not part of a cluster or the cluster is down, the cluster configuration file (ClusDb) can be treated like any other registry hive.

How do I save the state of a clustered system?

This state is contained in the quorum resource or database. For a backup application to successfully save the state of a clustered system, at a minimum it will need to perform the following steps: Detect whether the system is a clustered system and determine its current state. Select a clustered node for backup.

What happens to the cluster configuration file when the cluster is down?

While a node is not part of a cluster or the cluster is down, the cluster configuration file (ClusDb) can be treated like any other registry hive. If the cluster is running, ClusDb will have to be committed on reboot as part of the registry.