To use this option you’ll need access to servers you intend to use in your Kubernetes cluster. Provision each server according to Rancher requirements, which includes some hardware specifications and Docker. After you install Docker on each server, run the command provided in the Rancher UI to turn each server into a Kubernetes node.
Objectives for Creating Cluster with Custom Nodes
Want to use Windows hosts as Kubernetes workers?
See Configuring Custom Clusters for Windows before you start.
1. Provision a Linux Host
Begin creation of a custom cluster by provisioning a Linux host. Your host can be:
- A cloud-host virtual machine (VM)
- An on-premise VM
- A bare-metal server
- While creating your cluster, you must assign Kubernetes roles to your cluster nodes. If you plan on dedicating servers to each role, you must provision a server for each role (i.e. provision multiple servers).
- If you want to reuse a node from a previous custom cluster, clean the node before using it in a cluster again. If you reuse a node that hasn’t been cleaned, cluster provisioning may fail.
Provision the host according to the requirements below.
Each node in your cluster must meet our Requirements.
2. Create the Custom Cluster
From the Clusters page, click Add Cluster.
Enter a Cluster Name.
Use Member Roles to configure user authorization for the cluster.
- Click Add Member to add users that can access the cluster.
- Use the Role drop-down to set permissions for each user.
Use Cluster Options to choose the version of Kubernetes, what network provider will be used and if you want to enable project network isolation. To see more cluster options, click on Show advanced options.
Using Windows nodes as Kubernetes workers?
From Node Role, choose the roles that you want filled by a cluster node.
- Using Windows nodes as Kubernetes workers? See Node Configuration.
- Bare-Metal Server Reminder: If you plan on dedicating bare-metal servers to each role, you must provision a bare-metal server for each role (i.e. provision multiple bare-metal servers).
Copy the command displayed on screen to your clipboard.
Log in to your Linux host using your preferred shell, such as PuTTy or a remote Terminal connection. Run the command copied to your clipboard.
Note: Repeat steps 7-10 if you want to dedicate specific hosts to specific node roles. Repeat the steps as many times as needed.
When you finish running the command(s) on your Linux host(s), click Done.
- Your cluster is created and assigned a state of Provisioning. Rancher is standing up your cluster.
- You can access your cluster after its state is updated to Active.
- Active clusters are assigned two Projects,
Default(containing the namespace
System(containing the namespaces
kube-system, if present).
3. Amazon Only: Tag Resources
If you have configured your cluster to use Amazon as Cloud Provider, tag your AWS resources with a cluster ID.
Note: You can use Amazon EC2 instances without configuring a cloud provider in Kubernetes. You only have to configure the cloud provider if you want to use specific Kubernetes cloud provider functionality. For more information, see Kubernetes Cloud Providers
The following resources need to tagged with a
- Nodes: All hosts added in Rancher.
- Subnet: The subnet used for your cluster
Security Group: The security group used for your cluster.
Note: Do not tag multiple security groups. Tagging multiple groups generates an error when creating Elastic Load Balancer.
The tag that should be used is:
<CLUSTERID>can be any string you choose. However, the same string must be used on every resource you tag. Setting the tag value to
ownedinforms the cluster that all resources tagged with the
<CLUSTERID>are owned and managed by this cluster.
If you share resources between clusters, you can change the tag to: